UN Regulation No 79 – Uniform provisions concerning the approval of vehicles with regard to steering equipment [2025/3]

Official Journal EN of the European Union L series 2025/3 10.1.2025 Only the original UN/ECE texts have legal effect under international public law. The status and date of entry into force of this Regulation should be checked in the latest version of the UN/ECE status document TRANS/WP.29/343, available at: https://unece.org/status- 1958-agreement-and-annexed-regulations UN Regulation No 79 – Uniform provisions concerning the approval of vehicles with regard to steering equipment [2025/3] Incorporating all valid text up to: Supplement 6 to the 04 series of amendments – Date of entry into force: 10 January 2025 This document is meant purely as documentation tool. The authentic and legally binding texts are: ECE/TRANS/WP.29/2019/73 ECE/TRANS/WP.29/2020/11 ECE/TRANS/WP.29/2020/67 ECE/TRANS/WP.29/2021/14 ECE/TRANS/WP.29/2021/72 ECE/TRANS/WP.29/2021/82 (as amended by paragraph 99 of the report ECE/TRANS/WP.29/1159) ECE/TRANS/WP.29/2021/138 ECE/TRANS/WP.29/2022/16 ECE/TRANS/WP.29/2022/81 ECE/TRANS/WP.29/2023/69 ECE/TRANS/WP.29/2024/8 ECE/TRANS/WP.29/2024/62 CONTENTS Regulation Introduction 1. Scope 2. Definitions 3. Application for approval 4. Approval 5. Constructions provisions 6. Test provisions 7. Conformity of production 8. Penalties for non-conformity of production 9. Modifications and extension of approval of the vehicle type 10. Production definitively discontinued 11. Names and addresses of Technical Services responsible for conducting approval tests and of Type Approval Authorities 12. Transitional provisions ELI: http://data.europa.eu/eli/reg/2025/3/oj 1/83EN OJ L, 10.1.2025 Annexes 1 Communication 2 Arrangements of approval marks 3 Braking performance for vehicles using the same energy source to supply steering equipment and braking device 4 Additional provisions for vehicles equipped with Auxiliary Steering Equipment 5 Provisions for trailers having hydraulic steering transmissions 6 Special requirements to be applied to the safety aspects of electronic control systems Appendix 1 - Model assessment form for electronic systems 7 Special provisions for the powering of trailer steering systems from the towing vehicle 8 Test requirements for corrective and automatically commanded steering functions 9 Compatibility between towing vehicles and trailers with regard to data transmission according to ISO 11992 for environmental monitoring 10 Test procedure to assess the functional compatibility of vehicles equipped with ACSF control lines Introduction The intention of the Regulation is to establish uniform provisions for the layout and performance of steering systems fitted to vehicles used on the road. Traditionally the major requirement has been that the main steering system contains a positive mechanical link between the steering control, normally the steering wheel, and the road wheels in order to determine the path of the vehicle. The mechanical link, if amply dimensioned, has been regarded as not being liable to failure. Advancing technology, coupled with the wish to improve occupant safety by elimination of the mechanical steering column, and the production advantages associated with easier transfer of the steering control between left and right hand drive vehicles, has led to a review of the traditional approach and the Regulation is now amended to take account of the new technologies. Accordingly it will now be possible to have steering systems in which there is not any positive mechanical connection between the steering control and the road wheels. Systems whereby the driver remains in primary control of the vehicle but may be helped by the steering system being influenced by signals initiated on-board the vehicle are defined as "Advanced Driver Assistance Steering Systems". Such systems can incorporate an "Automatically Commanded Steering Function", for example, using passive infrastructure features to assist the driver in keeping the vehicle on an ideal path (Lane Guidance, Lane Keeping or Heading Control), to assist the driver in manoeuvring the vehicle at low speed in confined spaces or to assist the driver in coming to rest at a pre-defined point (Bus Stop Guidance). Advanced Driver Assistance Steering Systems can also incorporate a "Corrective Steering Function" that, for example, warns the driver of any deviation from the chosen lane (Lane Departure Warning), corrects the steering angle to prevent departure from the chosen lane (Lane Departure Avoidance) or corrects the steering angle of one or more wheels to improve the vehicle's dynamic behaviour or stability. In the case of any Advanced Driver Assistance Steering System, the driver can, at all times, choose to override the assistance function by deliberate action, for example, to avoid an unforeseen object in the road. Advances in technology have enabled the possibility for vehicles to be operated by an Automated Driving System (ADS) without the need for any human driver. As an initial step, this Regulation has been adapted to allow the approval of vehicles with an ADS where those vehicles are also equipped with manual driving controls. It is expected that in the manual driving mode the technical requirements can be applied as they would be for a conventional vehicle. In the automated driving mode, it is important that the requirements of Annex 6 are applied appropriately to the transmission links between the ADS and the steering equipment and, in the absence of a driver, that any faults in the steering equipment are identified by and/or transmitted to the ADS. It is also important that an 2/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 ADS is only permitted to control the steering equipment if the ADS complies with the applicable regulatory requirements in the geographical area(s) where it can operate. In a second step, the Regulation will be further adapted to allow for the approval of automated vehicles which do not have manual steering controls, or which only have manual controls for use in limited circumstances such as vehicle recovery. It was previously anticipated that future technology would also allow steering to be influenced or controlled by sensors and signals generated either on or off-board the vehicle. This had led to several concerns regarding responsibility for the primary control of the vehicle and the absence of any internationally agreed data transmission protocols with respect to off-board or external control of steering. Therefore, the Regulation does not permit the general approval of systems that incorporate functions by which the steering can be controlled by external signals, for example, transmitted from roadside beacons or active features embedded into the road surface, unless these functions meet the definition of an ADS. Such systems, which do not require the presence of a driver, but which are not ADS, have been defined as 'Autonomous Steering Systems'. This Regulation also prevents the approval of positive steering of trailers by means of electrical control from the towing vehicle as there are currently no standards applicable to this application. It is expected that at some time in the future, ISO 11992 will be amended to include messages associated with the transmission of steering control. 1. Scope 1.1. This Regulation applies to the steering equipment of vehicles of categories M, N and O.(1) 1.2. This Regulation does not apply to: 1.2.1. Steering equipment with a purely pneumatic transmission; 1.2.2. Autonomous Steering Systems as defined in paragraph 2.3.3.; 1.2.3. Steering systems exhibiting the functionality defined as ACSF of Category B2, D or E in paragraphs 2.3.4.1.3., 2.3.4.1.5., or 2.3.4.1.6., respectively, until specific provisions are introduced in this Regulation. 1.2.4. Vehicles of Categories M and N which are not equipped with manual steering controls intended for use during normal operation. 2. Definitions For the purposes of this Regulation: 2.1. "Approval of a vehicle" means the approval of a vehicle type with regard to its steering equipment. 2.2. "Vehicle type" means a vehicle which does not differ with respect to the manufacturer's designation of the vehicle type and in essential characteristics such as: 2.2.1. Type of steering equipment, steering control, steering transmission, steered wheels, and energy source. 2.3. "Steering equipment" means all the equipment the purpose of which is to determine the direction of movement of the vehicle. (1) As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3), document ECE/TRANS/WP.29/78/Rev.7, para. 2 - https://unece.org/transport/standards/transport/vehicle-regulations-wp29/resolutions. ELI: http://data.europa.eu/eli/reg/2025/3/oj 3/83EN OJ L, 10.1.2025 The steering equipment consists of: — The steering control, — The steering transmission, — The steered wheels, — The energy supply, if any. 2.3.1. "Steering control" means the part of the steering equipment directly actuated by a driver which controls its operation, but which may also operate without direct intervention of the driver (e.g. due to action by an Advanced Driver Assistance Steering System or ADS). For steering equipment in which the steering forces are provided solely or partly by the muscular effort of the driver the steering control includes all parts up to the point where the steering effort is transformed by mechanical, hydraulic or electrical means; 2.3.2. "Steering transmission" means all components which form a functional link between the steering control and the road wheels. The transmission is divided into two independent functions: The control transmission and the energy transmission. Where the term "transmission" is used alone in this Regulation, it means both the control transmission and the energy transmission. A distinction is drawn between mechanical, electrical and hydraulic transmission systems or combinations thereof, according to the means by which the signals and/or energy is transmitted. 2.3.2.1. "Control transmission" means all components by means of which signals are transmitted for control of the steering equipment. 2.3.2.2. "Energy transmission" means all components by means of which the energy required for control/regulation of the steering function of the wheels is transmitted. 2.3.3. "Autonomous Steering System" means a system, other than an ADS, that incorporates a function within a complex electronic control system that causes the vehicle to follow a defined path or to alter its path in response to signals initiated and transmitted from off-board the vehicle. The driver will not necessarily be in primary control of the vehicle. 2.3.4. "Advanced Driver Assistance Steering System" means a system, additional to the main steering system, that provides assistance to the driver in steering the vehicle but in which the driver remains at all times in primary control of the vehicle. It comprises at least one of the following functions: 2.3.4.1. "Automatically commanded steering function (ACSF)" means a function within an electronic control system where actuation of the steering system can result from automatic evaluation of signals initiated on-board the vehicle, possibly in conjunction with passive infrastructure features, to generate control action in order to assist the driver. 2.3.4.1.1. "ACSF of Category A" means a function that operates at a speed no greater than 10 km/h to assist the driver, on demand, in low speed or parking manoeuvring. 2.3.4.1.2. "ACSF of Category B1" means a function which assists the driver in keeping the vehicle within the chosen lane, by influencing the lateral movement of the vehicle. 2.3.4.1.3. "ACSF of Category B2" means a function which is initiated/activated by the driver and which keeps the vehicle within its lane by influencing the lateral movement of the vehicle for extended periods without further driver command/confirmation 4/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 2.3.4.1.4. "ACSF of Category C" means, a function which is initiated/activated by the driver and which can perform a single lateral manoeuvre (e.g. lane change) when commanded by the driver. 2.3.4.1.5. "ACSF of Category D" means a function which is initiated/activated by the driver and which can indicate the possibility of a single lateral manoeuvre (e.g. lane change) but performs that function only following a confirmation by the driver. 2.3.4.1.6. "ACSF of Category E" means a function which is initiated/activated by the driver and which can continuously determine the possibility of a manoeuvre (e.g. lane change) and complete these manoeuvres for extended periods without further driver command/confirmation. 2.3.4.2. "Corrective Steering Function (CSF)" means a control function within an electronic control system whereby, for a limited duration, changes to the steering angle of one or more wheels may result from the automatic evaluation of signals initiated on-board the vehicle, in order: (a) To compensate a sudden, unexpected change in the side force of the vehicle, or; (b) To improve the vehicle stability (e.g. side wind, differing adhesion road conditions "μ-split"), or; (c) To correct lane departure. (e.g. to avoid crossing lane markings, leaving the road). 2.3.4.3. "Emergency Steering Function (ESF)" means a control function which can automatically detect a potential collision and automatically activate the vehicle steering system for a limited duration, to steer the vehicle with the purpose of avoiding or mitigating a collision, with: (a) Another vehicle driving(2)in an adjacent lane: (i) Drifting towards the path of the subject vehicle and/or; (ii) Into which path the subject vehicle is drifting and/or; (iii) Into which lane the driver initiates a lane change manoeuver. (b) An obstacle obstructing the path of the subject vehicle or when the obstruction of the subject vehicle’s path is deemed imminent. ESF shall cover one or more use cases from the list above. 2.3.4.4. "Remote Control Manoeuvring (RCM)" means a function actuated by the driver that provides direct control on steering angle, acceleration, and deceleration for low speed manoeuvring. The actuation is made by a remote control device in close proximity to the vehicle. 2.3.4.5. "Risk Mitigation Function (RMF)" means an emergency function which can, in the event the driver becomes unresponsive, automatically activate the vehicle steering system for a limited duration to steer the vehicle with the purpose of bringing the vehicle to a safe stop within a target stop area. 2.3.5. "Steered wheels" means the wheels, the alignment of which may be altered directly or indirectly in relation to the longitudinal axis of the vehicle in order to determine the direction of movement of the vehicle. (The steered wheels include the axis around which they are rotated in order to determine the direction of movement of the vehicle); 2.3.6. "Energy supply" includes those parts of the steering equipment which provide it with energy, regulate that energy and where appropriate, process and store it. It also includes any storage reservoirs for the operating medium and the return lines, but not the vehicle's engine (except for the purpose of paragraph 5.3.2.1.) or its drive to the energy source. (2) The vehicle may be driving in the same or the opposite direction as the subject vehicle. ELI: http://data.europa.eu/eli/reg/2025/3/oj 5/83EN OJ L, 10.1.2025 2.3.6.1. "Energy source" means the part of the energy supply, which provides the energy in the required form. 2.3.6.2. "Energy reservoir" means that part of the energy supply in which the energy provided by the energy source is stored, for example, a pressurised fluid reservoir or vehicle battery. 2.3.6.3. "Storage reservoir" means that part of the energy supply in which the operating medium is stored at or near to the atmospheric pressure, for example a fluid reservoir. 2.4. Steering parameters 2.4.1. "Steering control effort" means the force applied to the steering control in order to steer the vehicle. 2.4.2. "Steering time" means the period of time from the beginning of the movement of the steering control to the moment at which the steered wheels have reached a specific steering angle. 2.4.3. "Steering angle" means the angle between the projection of a longitudinal axis of the vehicle and the line of intersection of the wheel plane (being the central plane of the wheel, normal to the axis around which it rotates) and the road surface. 2.4.4. "Steering forces" mean all the forces operating in the steering transmission. 2.4.5. "Mean steering ratio" means the ratio of the angular displacement of the steering control to the mean of the swept steering angle of the steered wheels for a full lock-to-lock turn. 2.4.6. "Turning circle" means the circle within which are located the projections onto the ground plane of all the points of the vehicle, excluding the external devices for indirect vision and the front direction indicators, when the vehicle is driven in a circle. 2.4.7. "Nominal radius of steering control" means in the case of a steering wheel the shortest dimension from its centre of rotation to the outer edge of the rim. In the case of any other form of control it means the distance between its centre of rotation and the point at which the steering effort is applied. If more than one such point is provided, the one requiring the greatest effort shall be used. 2.4.8. "Remote Controlled Parking (RCP)" means an ACSF of category A, actuated by the driver, providing parking or low speed manoeuvring. The actuation is made in close proximity to the vehicle or the vehicle combination. 2.4.9. "Specified maximum RCP operating range (S )" means the maximum distance between the nearest point of the RCPmax motor vehicle or of the contour of both vehicles in case of vehicle combination and the remote control device or alternatively the driver (for systems based on detection of driver position and movement), up to which ACSF is designed to operate. 2.4.10. "Specified maximum speed V " means the maximum speed up to which an ACSF is designed to operate. smax 2.4.11. "Specified minimum speed V " means the minimum speed down to which an ACSF is designed to operate. smin 2.4.12. "Specified maximum lateral acceleration ay " means the maximum lateral acceleration of the vehicle up to which smax an ACSF is designed to operate. 2.4.13. An ACSF is in "off mode" (or "switched off") when the function is prevented from generating a steering control action to assist the driver. 6/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 2.4.14. An ACSF is in "standby mode" when the function is switched on, but the conditions (e.g. system operating conditions, deliberate action from driver) for being active are not all met. In this mode, the system is not ready to generate a steering control action to assist the driver. 2.4.15. An ACSF is in "active mode" (or "active") when the function is switched on and the conditions for being active are met. In this mode, the system continuously or discontinuously controls the steering system, generating, or being ready to generate, a steering control action to assist the driver. 2.4.16. A "Lane Change Procedure" starts when the direction indicator lamps are activated and ends when the direction indicator lamps are deactivated. It comprises the following operations: (a) Activation of the direction indicator lamps; (b) Lateral movement of the vehicle towards the lane boundary; (c) Lane Change Manoeuvre; (d) Resumption of the lane keeping function; (e) Deactivation of direction indicator lamps. 2.4.17. A "Lane Change Manoeuvre" is part of the Lane Change Procedure and, (a) Starts when the outside edge of the tyre tread of the power-driven vehicle’s front wheel closest to the lane markings touches the inside edge of the lane marking to which the vehicle is being manoeuvred, (b) Ends when the rear wheels of the power-driven vehicle (or combination) have fully crossed the lane marking. 2.4.18. "Specified maximum RCM operating range (S )" means the maximum distance between the nearest point of RCMmax the motor vehicle and the remote-control device up to which RCM is designed to operate. 2.4.19. "Target stop area" means a potential stopping area (e.g. emergency lane, hard shoulder, beside the road, slowest lane of traffic, own lane of travel). 2.4.20. “Beside the road” means the area of road surface beyond the boundaries of the carriageway which is not a hard shoulder or refuge area. 2.5. Types of steering equipment Depending on the way the steering forces are produced, the following types of equipment are distinguished: 2.5.1. For motor vehicles: 2.5.1.1. "Main steering system" means the steering equipment of a vehicle which is mainly responsible for determining the direction of travel. It may comprise: 2.5.1.1.1. "Manual steering equipment" in which the steering forces result solely from the muscular effort of the driver; 2.5.1.1.2. "Power assisted steering equipment" in which the steering forces result from both the muscular effort of the driver and the energy supply (supplies). ELI: http://data.europa.eu/eli/reg/2025/3/oj 7/83EN OJ L, 10.1.2025 2.5.1.1.2.1. Steering equipment in which the steering forces result solely from one or more energy supplies when the equipment is intact, but in which the steering forces can be provided by the muscular effort of the driver alone if there is a fault in the steering (integrated power systems), is also considered to be power assisted steering equipment; 2.5.1.1.3. "Full-power steering equipment" in which the steering forces are provided solely by one or more energy supplies; 2.5.1.2. "Self-tracking steering equipment" means a system designed to create a change of steering angle on one or more wheels only when acted upon by forces and/or moments applied through the tyre to road contact. 2.5.1.3. "Auxiliary Steering Equipment (ASE)" means a system in which the wheels on axle(s) of vehicles of categories M and N are steered in addition to the wheels of the main steering equipment in the same or opposite direction to those of the main steering equipment and/or the steering angle of the front and/or the rear wheels may be adjusted relative to vehicle behaviour. 2.5.2. For trailers: 2.5.2.1. "Self-tracking steering equipment" means a system designed to create a change of steering angle on one or more wheels only when acted upon by forces and/or moments applied through the tyre to road contact. 2.5.2.2. "Articulated steering" means equipment in which the steering forces are produced by a change in direction of the towing vehicle and in which the movement of the steered trailer wheels is linked to the relative angle between the longitudinal axis of the towing vehicle and that of the trailer. 2.5.2.3. "Self-steering" means equipment in which the steering forces are produced by a change in direction of the towing vehicle and in which the movement of the steered trailer wheels is firmly linked to the relative angle between the longitudinal axis of the trailer frame or a load replacing it and the longitudinal axis of the sub- frame to which the axle(s) is (are) attached. 2.5.2.4. "Additional steering equipment" means a system, independent of the main steering system, by which the steering angle of one or more axle(s) of the steering system can be influenced selectively for manoeuvring purposes. 2.5.2.5. "Full-power steering equipment" means equipment in which the steering forces are provided solely by one or more energy supplies. 2.5.3. Depending on the arrangement of the steered wheels, the following types of steering equipment are distinguished: 2.5.3.1. "Front-wheel steering equipment" in which only the wheels of the front axle(s) are steered. This includes all wheels which are steered in the same direction; 2.5.3.2. "Rear-wheel steering equipment" in which only the wheels of the rear axle(s) are steered. This includes all wheels which are steered in the same direction; 2.5.3.3. "Multi-wheel steering equipment" in which the wheels of one or more of each of the front and the rear axle(s) are steered; 2.5.3.3.1. "All-wheel steering equipment" in which all the wheels are steered; 2.5.3.3.2. "Buckle steering equipment" in which the movement of chassis parts relative to each other is directly produced by the steering forces. 8/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 2.6. Types of steering transmission Depending on the way the steering forces are transmitted, the following types of steering transmission are distinguished: 2.6.1. "Purely mechanical steering transmission" means a steering transmission in which the steering forces are transmitted entirely by mechanical means; 2.6.2. "Purely hydraulic steering transmission" means a steering transmission in which the steering forces, somewhere in the transmission, are transmitted only by hydraulic means; 2.6.3. "Purely electric steering transmission" means a steering transmission in which the steering forces, somewhere in the transmission, are transmitted only through electric means; 2.6.4. "Hybrid steering transmission" means a steering transmission in which part of the steering forces is transmitted through one and the other part through another of the above mentioned means. However, in the case where any mechanical part of the transmission is designed only to give position feedback and is too weak to transmit the total sum of the steering forces, this system shall be considered to be purely hydraulic or purely electric steering transmission. 2.7. "Electric control line" means the electrical connection between two vehicles which provides the steering control function to a towed vehicle within a combination. It comprises the electrical wiring and connector and includes the parts for data communication and the electrical energy supply for the trailer control transmission. 2.8. "Data communication" means the transfer of digital data under the rules of a protocol. 2.9. "Point-to-point" means a topology of a communication network with only two units. Each unit has an integrated termination resistor for the communication line. 2.10. (reserved) 2.11. “Automated Driving System (ADS)” means the vehicle hardware and software that are collectively capable of performing the entire Dynamic Driving Task (DDT) on a sustained basis. 2.11.1. “Dynamic Driving Task (DDT)” means the real-time operational and tactical functions required to operate the vehicle. 3. Application for approval 3.1. The application for approval of a vehicle type with regard to the steering equipment shall be submitted by the vehicle manufacturer or by his duly accredited representative. 3.2. It shall be accompanied by the undermentioned documents in triplicate, and by the following particulars: 3.2.1. A description of the vehicle type with regard to the items mentioned in paragraph 2.2.; the vehicle type shall be specified; 3.2.2. A brief description of the steering equipment with a diagram of the steering equipment as a whole, showing the position on the vehicle of the various devices influencing the steering; ELI: http://data.europa.eu/eli/reg/2025/3/oj 9/83EN OJ L, 10.1.2025 3.2.3. In the case of full power steering systems and systems to which Annex 6 of this Regulation applies, an overview of the system indicating the philosophy of the system and the fail-safe procedures, redundancies and warning systems necessary to ensure safe operation in the vehicle. The necessary technical files relating to such systems shall be made available for discussion with the Type Approval Authority and/or Technical Service. Such files will be discussed on a confidential basis. 3.3. A vehicle representative of the vehicle type to be approved shall be submitted to the Technical Service responsible for conducting approval tests. 4. Approval 4.1. If the vehicle submitted for approval pursuant to this Regulation meets all relevant requirements given in this Regulation, approval of that vehicle type with regard to the steering equipment shall be granted. 4.1.1. The Type Approval Authority shall verify the existence of satisfactory arrangements for ensuring effective control of the conformity of production as given in paragraph 7. of this Regulation, before type approval is granted. 4.2. An approval number shall be assigned to each type approved. Its first two digits (at present 03) shall indicate the series of amendments incorporating the most recent major technical amendments made to the Regulation at the time of issue of the approval. The same Contracting Party shall not assign this number to another vehicle type or to the same vehicle type submitted with different steering equipment from that described in the documents required by paragraph 3. 4.3. Notice of approval or of extension or refusal of approval of a vehicle type pursuant to this Regulation shall be communicated to the Parties to the 1958 Agreement which apply this Regulation, by means of a form conforming to the model in Annex 1 to this Regulation. 4.4. There shall be affixed, conspicuously and in a readily accessible place specified on the approval form, to every vehicle conforming to a vehicle type approved under this Regulation, an international approval mark consisting of: 4.4.1. a circle surrounding the letter "E" followed by the distinguishing number of the country which has granted approval;(3) 4.4.2. the number of this Regulation, followed by the letter "R", a dash and the approval number to the right of the circle prescribed in paragraph 4.4.1. 4.5. If the vehicle conforms to a vehicle type approved, under one or more other Regulations annexed to the Agreement, in the country which has granted approval under this Regulation, the symbol prescribed in paragraph 4.4.1. need not be repeated; in such a case the Regulation and approval numbers and the additional symbols of all the Regulations under which approval has been granted in the country which has granted approval under this Regulation shall be placed in vertical columns to the right of the symbol prescribed in paragraph 4.4.1. 4.6. The approval mark shall be clearly legible and shall be indelible. 4.7. The approval mark shall be placed close to or on the vehicle data plate affixed by the manufacturer. (3) The distinguishing numbers of the Contracting Parties to the 1958 Agreement are reproduced in Annex 3 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), document ECE/TRANS/WP.29/78/Rev.6, Annex 3 - https://unece.org/transport/ standards/transport/vehicle-regulations-wp29/resolutions. 10/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 4.8. Annex 2 to this Regulation gives examples of arrangements of approval marks. 5. Construction provisions 5.1. General provisions 5.1.1. The steering system shall ensure easy and safe handling of the vehicle up to its maximum design speed or in case of a trailer up to its technically permitted maximum speed. There shall be a tendency to self-centre when tested in accordance with paragraph 6.2. with the intact steering equipment. The vehicle shall meet the requirements of paragraph 6.2. in the case of motor vehicles and of paragraph 6.3. in the case of trailers. If a vehicle is fitted with an auxiliary steering system, it shall also meet the requirements of Annex 4. Trailers equipped with hydraulic steering transmissions shall comply also with Annex 5. 5.1.2. It shall be possible to travel along a straight section of road without unusual steering correction by the driver and without unusual vibration in the steering system at the maximum design speed of the vehicle. 5.1.3. The direction of operation of the steering control shall correspond to the intended change of direction of the vehicle and there shall be a continuous relationship between the steering control deflection and the steering angle. These requirements do not apply to systems that incorporate an automatically commanded or corrective steering function, to steering being controlled by an ADS, or to ASE. These requirements may also not necessarily apply in the case of full power steering when the vehicle is stationary, during low-speed manoeuvres at speeds up to a maximum speed of 15km/h and when the system is not energised. 5.1.4. The steering equipment shall be designed, constructed and fitted in such a way that it is capable of withstanding the stresses arising during normal operation of the vehicle, or combination of vehicles. The maximum steering angle shall not be limited by any part of the steering transmission unless specifically designed for this purpose. Unless otherwise specified, it will be assumed that for the purpose of this Regulation, not more than one failure can occur in the steering equipment at any one time and two axles on one bogie shall be considered as one axle. 5.1.5. The effectiveness of the steering equipment, including the electrical control lines, shall not be adversely affected by magnetic or electric fields. This shall be demonstrated by fulfilling the technical requirements and respecting the transitional provisions of UN Regulation No. 10 by applying: (a) The 03 series of amendments for vehicles without a coupling system for charging the Rechargeable Electric Energy Storage System (traction batteries); (b) The 04 series of amendments for vehicles with a coupling system for charging the Rechargeable Electric Energy Storage System (traction batteries). 5.1.6. Advanced driver assistance steering systems shall only be approved in accordance with this Regulation where the function does not cause any deterioration in the performance of the basic steering system. In addition they shall be designed such that the driver may, at any time and by deliberate action, override the function. 5.1.6.1. A CSF system shall be subject to the requirements of Annex 6. 5.1.6.1.1. Every CSF intervention shall immediately be indicated to the driver by an optical warning signal which is displayed for at least 1 s or as long as the intervention exists, whichever is longer. When a flashing mode is used, a lighting phase shall be visible at the end of the intervention or later. ELI: http://data.europa.eu/eli/reg/2025/3/oj 11/83EN OJ L, 10.1.2025 In the case of a CSF intervention which is controlled by an Electronic Stability Control (ESC) or a Vehicle Stability Function as specified in the relevant UN Regulation (i.e. UN Regulations Nos. 13, 13-H or 140), the ESC flashing tell-tale indicating the interventions of ESC may be used, as long as the intervention exists, as an alternative to the optical warning signal specified above. 5.1.6.1.2. In the case of a CSF intervention which is based on the evaluation of the presence and location of lane markings or boundaries of the lane the following shall apply additionally: 5.1.6.1.2.1. In the case of an intervention longer than: (a) 10 s for vehicles of category M and N , or 1 1 (b) 30 s for vehicles of category M , M and N , N , 2 3 2 3 an acoustic warning signal shall be provided until the end of the intervention. 5.1.6.1.2.2. In the case of two or more consecutive interventions within a rolling interval of 180 seconds and in the absence of a steering input by the driver during the intervention, an acoustic warning signal shall be provided by the system during the second and any further intervention within a rolling interval of 180 seconds. Starting with the third intervention (and subsequent interventions) the acoustic warning signal shall continue for at least 10 seconds longer than the previous warning signal. 5.1.6.1.2.3. For vehicles of categories M and M equipped with a Lane Departure Warning System (LDWS) fulfilling the 2 3 technical requirements of Regulation No. 130, the acoustic warning signal specified in paragraphs 5.1.6.1.2.1. and 5.1.6.1.2.2. may be replaced by a haptic warning, provided it is not solely given via the steering wheel. 5.1.6.1.3. The steering control effort necessary to override the directional control provided by the system shall not exceed 50 N in the whole range of CSF operations. 5.1.6.1.4. The requirements in paragraphs 5.1.6.1.1., 5.1.6.1.2. and 5.1.6.1.3. for CSF, which are reliant on the evaluation of the presence and location of lane markings or boundaries of the lane, shall be tested in accordance with the relevant vehicle test(s) specified in Annex 8 to this Regulation. 5.1.6.2. Vehicles equipped with an ESF shall fulfil the following requirements. An ESF system shall be subject to the requirements of Annex 6. 5.1.6.2.1. Any ESF shall only start an intervention in the case where a risk of a collision is detected. 5.1.6.2.2 Any vehicle fitted with ESF shall be equipped with means to monitor the driving environment (e.g. lane markings, road edge, other road users) in line with the specified use case. These means shall monitor the driving environment at any time the ESF is active. 5.1.6.2.3. An automatic avoidance manoeuvre initiated by an ESF shall not lead the vehicle to leave the road, if applicable for the specified use case according to para. 5.1.6.2.10. 5.1.6.2.3.1. In the case of an ESF intervention on a road or a lane delimited with lane markings on one or both side(s), an automatic avoidance manoeuver initiated by an ESF shall not lead the vehicle to cross a lane marking. However, if the intervention starts during a lane change performed by the driver or during an unintentional drift into the adjacent lane, the system may steer the vehicle back into its original lane of travel. 12/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.1.6.2.3.2. In the absence of a lane marking on one or on both side(s) of the vehicle, a single ESF intervention is permitted, provided that it does not produce a lateral offset of the vehicle greater than 0.75 m in a direction where the lane marking is absent. The lateral offset during the automatic avoidance manoeuvre shall be determined using a fixed point on the front of the vehicle at the start and at the conclusion of the ESF intervention. The lateral offset of 0.75 m may be exceeded by a system intervention if the vehicle speed during the whole intervention is below 20 km/h and the lateral offset rate generated by the system is limited to 2 m/s, calculated as an average for a time period of 1 s. 5.1.6.2.4. The ESF intervention shall not lead the vehicle to collide with another road user.(4) 5.1.6.2.5. The manufacturer shall demonstrate during type approval, to the satisfaction of the Technical Service, which means to monitor the driving environment are fitted to the vehicle to satisfy the provisions in the subparagraphs of paragraph 5.1.6.2. above. 5.1.6.2.6. Any intervention of an ESF shall be indicated to the driver with an optical and with an acoustic or haptic warning signal to be provided at the latest with the start of the ESF intervention and maintained as long as the intervention exists. For this purpose appropriate signals used by other warning systems (e.g. blind spot detection, lane departure warning, forward collision warning) are deemed to be sufficient to fulfil the requirements for the respective optical, acoustic or haptic signals above. 5.1.6.2.7. A system failure shall be indicated to the driver with an optical warning signal. However, when the system is manually deactivated, the indication of failure mode may be suppressed. 5.1.6.2.8. The steering control effort necessary to override the directional control provided by the system shall not exceed 50 N. 5.1.6.2.9. The vehicle shall be tested in accordance with the relevant vehicle tests specified in Annex 8 to this Regulation. 5.1.6.2.10. System information data The following data shall be provided, together with the documentation package required in Annex 6 to this Regulation, to the Technical Service at the time of type approval: (a) Use case(s) where ESF is designed to operate (among the use cases a i, a ii, a iii and b. specified in the ESF definition in paragraph 2.3.4.3.), (b) The conditions under which the system is active, e.g. the vehicle speed range V , V , smax smin (c) How ESF detects a risk of a collision, (d) Description of the means to detect the driving environment, (e) How to deactivate/reactivate the function, (f) How it is ensured that the overriding force does not exceed the limit of 50 N. 5.1.6.3. Vehicles equipped with an RMF shall fulfil the following requirements. An RMF system shall be subject to the requirements of Annex 6. (4) Until uniform test procedures have been agreed, the manufacturer shall provide the Technical Service with documentation and supporting evidence to demonstrate compliance with this provision. This information shall be subject to discussion and agreement between the Technical Service and the vehicle manufacturer. ELI: http://data.europa.eu/eli/reg/2025/3/oj 13/83EN OJ L, 10.1.2025 5.1.6.3.1. Any RMF shall start an intervention only: (a) If the driver is either directly (e.g. through a driver monitoring system) or indirectly (e.g. prolonged failed response to a warning, failure to control the vehicle) assessed to be unresponsive; or (b) If it is manually activated. If the system provides a means for manual activation, this means shall be protected against unintentional operation and accessible to the driver and to passengers adjacent to the driver. 5.1.6.3.2. Unless a request for action (e.g. hands-on warning) was already given or the system was manually activated, there shall be an optical and additionally an acoustic and/or haptic (e.g. brake jerks) warning signal before every RMF intervention in order to stimulate the driver to take back control. This warning phase shall start at least 5 seconds before the RMF starts an intervention, unless vehicle control by the system is required sooner to prevent the vehicle from crossing the lane markings or to keep an appropriate distance to other vehicles. Every RMF intervention shall be indicated to the driver by an optical and additionally an acoustic and/or haptic (e.g. brake jerks) warning signal for as long as the intervention exists. These warning signals shall be distinct and of a great urgency. 5.1.6.3.3. An RMF intervention shall not unreasonably deactivate or suppress the functionality of activated assistance systems (e.g. AEBS). 5.1.6.3.4. The signal to activate the hazard warning lights shall be generated with the start of the intervention. 5.1.6.3.5. It shall be possible to override the RMF intervention of the function at any time by a distinct action of the driver. The RMF shall implement strategies to provide protection against unintentional override by inputs to the driving controls (e.g. by requiring a significant change in a single input to the accelerator or brake pedal or multiple inputs to override the RMF). These strategies shall be demonstrated to the Technical Service at the time of type approval. 5.1.6.3.6. During the RMF intervention the vehicle shall slow down with a deceleration demand not greater than 4m/s2, unless required by the surrounding traffic (e.g. a decelerating lead vehicle). Higher deceleration demand values are also permissible for very short durations, e.g. as haptic warning to stimulate the driver to take back control. 5.1.6.3.7. Once the RMF has brought the vehicle to a safe stop in the target stop area, the vehicle shall not move away without manual input. 5.1.6.3.8. If the RMF system detects any failures preventing it from performing an intervention, this shall be signalled to the driver. 5.1.6.3.9. Additional provisions for systems with the purpose of bringing the vehicle to a safe stop outside its own lane of travel. 5.1.6.3.9.1. The RMF shall only be permitted to change lanes, if the vehicle is equipped with detection capabilities to the front, side and rear. 14/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.1.6.3.9.2. Lane change procedures shall only be performed in an uncritical way as described in paragraphs 5.1.6.3.9.7. and 5.1.6.3.9.8. In case the target stop area cannot be reached in an uncritical way the RMF shall aim to keep the vehicle within its current lane of travel while the vehicle is stopping. 5.1.6.3.9.3. Before initiating a lane change procedure, RMF shall, if deemed appropriate, reduce the vehicle speed to minimize the risk related to that lane change (e.g. by adapting the speed of the vehicle to that of other vehicles in the target lane). A lane change procedure shall not start within the first 5s following the start of the RMF intervention. 5.1.6.3.9.4. During the intervention the system may perform a single or multiple lane change(s) across regular lanes of traffic and/or to the hard shoulder. Lane changes shall be made only if under the traffic situation these lane changes can be considered to minimize the risk to safety of the vehicle occupants and other road users. 5.1.6.3.9.5. A lane change during the intervention shall only be performed if the system has sufficient information about its surrounding to the front, side and rear (as defined in paragraph 5.1.6.3.9.17.) in order to assess the criticality of that lane change. 5.1.6.3.9.6. A lane change during the intervention shall not be performed towards a lane intended for traffic moving in the opposite direction. 5.1.6.3.9.7. The intervention shall not cause a collision with another vehicle or road user in the predicted path of the vehicle during a lane change. 5.1.6.3.9.8. A lane change procedure shall be predictable and manageable for other road users. 5.1.6.3.9.8.1. During the lane change manoeuvre, the RMF shall aim to avoid a lateral acceleration of more than 1 m/s2 in addition to the lateral acceleration generated by the lane curvature. 5.1.6.3.9.8.2. A lane change manoeuvre shall only be started if a vehicle in the target lane is not forced to unmanageably decelerate due to the lane change of the vehicle. 5.1.6.3.9.8.2.1. During the lane change manoeuvre, RMF shall aim to avoid inducing a longitudinal deceleration of more than 3.7 m/s2 for a vehicle approaching from the rear. 5.1.6.3.9.8.2.2. A lane change manoeuvre shall only be started if there is sufficient space to a vehicle following behind or approaching from the rear in the adjacent lane. 5.1.6.3.9.8.2.3. In case the RMF decelerates the vehicle during a lane change procedure, this deceleration shall be factored in when assessing the distance to a vehicle approaching from the rear, and the deceleration shall be manageable for the vehicle approaching from the rear. 5.1.6.3.9.8.2.4. Where there is not sufficient headway time for the vehicle behind at the end of the lane change procedure, the RMF shall not increase the rate of deceleration for a certain period of time after the completion of the lane change procedure except for the purpose of avoiding or mitigating the risk of an imminent collision. 5.1.6.3.9.8.2.5. How the provisions of paragraph 5.1.6.3.9.8.2. and its subparagraphs are implemented in the system design shall be demonstrated to the Technical Service during type approval. 5.1.6.3.9.9. The lane change manoeuvre shall aim to be one continuous movement. ELI: http://data.europa.eu/eli/reg/2025/3/oj 15/83EN OJ L, 10.1.2025 5.1.6.3.9.10. A lane change during the intervention shall be completed without undue delay. 5.1.6.3.9.11. A lane change manoeuvre shall only be started if the manoeuvre is anticipated to be completed before the vehicle comes to a standstill (i.e. in order to avoid coming to standstill while in the middle of two regular lanes due to stopped traffic ahead). 5.1.6.3.9.12 Additional provisions for system behaviour for the vehicle’s final lane change during a lane change manoeuvre that is bringing the vehicle to a safe stop beside the road. 5.1.6.3.9.12.1. All provisions of paragraph 5.1.6.3.9. shall be applied except 5.1.6.3.9.11., 5.1.6.3.9.13., 5.1.6.3.9.14. and 5.1.6.3. 9.16. 5.1.6.3.9.12.2. The vehicle may come to a standstill on the lane mark beside the road. 5.1.6.3.9.12.3. In addition to the provisions of paragraph 5.1.6.3.9.7., an acoustic warning may be given as warning to other road users unless traffic rules in the country prohibits using an acoustic warning. 5.1.6.3.9.12.4. When bringing the vehicle to a stop beside the road the vehicle speed shall not exceed 10 km/h. 5.1.6.3.9.13. A lane change manoeuvre during an intervention shall be indicated in advance to other road users by activating the appropriate direction indicator lamps instead of the hazard warning lights. 5.1.6.3.9.14. Once the lane change manoeuvre is completed the direction indicator lamps shall be deactivated in a timely manner, and the hazard warning lights shall become active again. 5.1.6.3.9.15. (Reserved). 5.1.6.3.9.16. Notwithstanding paragraph 5.1.6.3.9.14. when several consecutive lane changes are performed as part of the RMF intervention, the direction indicator may remain active throughout these lane changes while the lateral behaviour shall ensure that each lane change manoeuvre can be perceived as an individual manoeuvre by following traffic. 5.1.6.3.9.17. If the vehicle is equipped with the capability to perform lane changes during the RMF intervention, the manufacturer shall declare the detection ranges to the front, side and rear. The declared ranges shall be sufficient to assess that a change into a lane immediately to the left or to the right of the vehicle does not cause a critical situation with another vehicle or road user during a lane change. The Technical Service shall assess the correspondence of declared detection ranges and lane change strategy and shall verify that the vehicle’s sensing system detects vehicles during the relevant test in Annex 8. These ranges shall be equal or greater than the declared ranges. 5.1.6.3.10. The system shall implement strategies to draw external attention to the emergency situation (e.g. triggering an emergency call, activating the horn, keeping the hazard warning lights active), when the driver remains unresponsive once RMF has brought the vehicle to standstill. 5.1.6.3.11. Special provisions for M /M vehicles 2 3 16/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.1.6.3.11.1. In case the system provides a means for manual activation by a passenger, the RMF system shall provide an indication to this passenger upon activation of the RMF. This indication shall continue until the RMF intervention starts or the activation is overridden by the driver. The driver shall be enabled to override the request from the passenger in order to suppress the RMF intervention. 5.1.6.3.11.2. An RMF fitted to a vehicle of Class I, II or A as defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3) shall provide an acoustic and optical indication to the passengers before the intervention would start. 5.1.6.3.12 System information data The following data shall be provided, together with the documentation package required in Annex 6 of this Regulation, to the Technical Service at the time of type approval: (a) Information on how the system confirms that the driver is unresponsive; (b) Information on whether the system is capable of performing lane changes and what is considered a target stop area by the system (c) Description of the means to detect the driving environment; (d) Information/specification on which road types (e.g. motorway, country roads, urban areas, etc.) the system is designed to intervene and how this is ensured; (e) Means to override the function and how the system provides protection against unintentional override; (f) Description of the driver warning and information concept, including warning before and during an RMF intervention (g) In case of lane change capability (i) A detailed description of the design provisions implemented to ensure safety of the manoeuvre (ii) The means by which the vehicle detects others road users, obstacles and the target stop area (iii) Description of how the system selects an appropriate target stop area and a description of the safety criteria on which this selection is based (h) Information/specification of the maximum speed the system operates with regards to different traffic environments (highway, urban, etc.) as well as information/specification on how the speed is reduced (e.g. adapted to surrounding traffic; no harsh braking endangering other road users) in order to come to a safe stop. 5.1.7. Towing vehicles equipped with a connection to supply electrical energy to the steering system of the trailer and trailers that utilise electrical energy from the towing vehicle to power the trailer steering system shall fulfil the relevant requirements of Annex 7. 5.1.8. Steering transmission 5.1.8.1. Adjustment devices for steering geometry shall be such that after adjustment a positive connection can be established between the adjustable components by appropriate locking devices. 5.1.8.2. Steering transmission which can be disconnected to cover different configurations of a vehicle (e.g. on extendable semi-trailers), shall have locking devices which ensure positive relocation of components; where locking is automatic, there shall be an additional safety lock which is operated manually. ELI: http://data.europa.eu/eli/reg/2025/3/oj 17/83EN OJ L, 10.1.2025 5.1.9. Steered wheels The steered wheels shall not be solely the rear wheels. This requirement does not apply to semi-trailers. 5.1.10. Energy supply The same energy supply may be used for the steering equipment and other systems. However, in the case of a failure in any system which shares the same energy supply steering shall be ensured in accordance with the relevant failure conditions of paragraph 5.3. 5.1.11. Control systems The requirements of Annex 6 shall be applied to the safety aspects of electronic vehicle control systems that provide or form part of the control transmission of the steering function including advanced driver assistance steering systems. However, systems or functions, that use the steering system as the means of achieving a higher level objective, are subject to Annex 6 only insofar as they have a direct effect on the steering system. If such systems are provided, they shall not be deactivated during type approval testing of the steering system. 5.2. Special provisions for trailers 5.2.1. Trailers (with the exception of semi-trailers and centre-axle trailers) which have more than one axle with steered wheels and semi-trailers and centre-axle trailers which have at least one axle with steered wheels shall fulfil the conditions given in paragraph 6.3. However, for trailers with self-tracking steering equipment a test under paragraph 6.3. is not necessary if the axle load ratio between the un-steered and the self-tracking axles equals or exceeds 1.6. under all loading conditions. However for trailers with self-tracking steering equipment, the axle load ratio between un-steered or articulated steered axles and friction-steered axles shall be at least 1 under all loading conditions. 5.2.2. If the towing vehicle of a vehicle combination is driving straight ahead, the trailer and towing vehicle shall remain aligned. If alignment is not retained automatically, the trailer shall be equipped with a suitable adjustment facility for maintenance. 5.3. Failure provisions and performance 5.3.1. General 5.3.1.1. For the purposes of this Regulation the steered wheels, the steering control and all mechanical parts of the steering transmission shall not be regarded as liable to breakage if they are amply dimensioned, are readily accessible for maintenance, and exhibit safety features at least equal to those prescribed for other essential components (such as the braking system) of the vehicle. Where the failure of any such part would be likely to result in loss of control of the vehicle, that part shall be made of metal or of a material with equivalent characteristics and shall not be subject to significant distortion in normal operation of the steering system. 5.3.1.2. The requirements of paragraphs 5.1.2., 5.1.3. and 6.2.1. shall also be satisfied with a failure in the steering equipment as long as the vehicle can be driven with the speeds required in the respective paragraphs. In this case paragraph 5.1.3. shall not apply for full power steering systems when the vehicle is stationary. 5.3.1.3. Any failure in a transmission other than purely mechanical shall clearly be brought to the attention of the vehicle driver as given in paragraph 5.4. When a failure occurs, a change in the average steering ratio is permissible if the steering effort given in paragraph 6.2.6. is not exceeded. 18/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.3.1.4. In the case where the braking system of the vehicle shares the same energy source as the steering system and this energy source fails, the steering system shall have priority and shall be capable of meeting the requirements of paragraphs 5.3.2. and 5.3.3. as applicable. In addition the braking performance on the first subsequent application, shall not drop below the prescribed service brake performance, as given in paragraph 2. of Annex 3 to this Regulation. 5.3.1.5. In the case where the braking system of the vehicle shares the same energy supply as the steering system and there is a failure in the energy supply, the steering system shall have priority and shall be capable of meeting the requirements of paragraphs 5.3.2. and 5.3.3. as applicable. In addition the braking performance on the first subsequent application shall comply with the prescriptions of paragraph 3. of Annex 3 to this Regulation. 5.3.1.6. The requirements for the braking performance in paragraphs 5.3.1.4. and 5.3.1.5. above shall not apply if the braking system is such that in the absence of any energy reserve it is possible with the service brake control to achieve the safety requirement for the secondary braking system mentioned in: (a) Paragraph 2.2. of UN Regulation No. 13-H, Annex 3 (for M and N vehicles); 1 1 (b) Paragraph 2.2. of UN Regulation No. 13, Annex 4 (for M , M and N vehicles). 2 3 5.3.1.7. In the case of trailers the requirements of paragraphs 5.2.2. and 6.3.4.1. shall also be met when there is a failure in the steering system. 5.3.2. Power assisted steering systems 5.3.2.1. Should the engine stop or a part of the transmission fail, with the exception of those parts listed in paragraph 5.3.1.1., there shall be no immediate changes in steering angle. As long as the vehicle is capable of being driven at a speed greater than 10 km/h the requirements given in paragraph 6., relating to a system with a failure, shall be met. 5.3.3. Full power steering systems 5.3.3.1. The system shall be designed such that the vehicle cannot be driven indefinitely at speeds above 10 km/h where there is any fault which requires operation of the warning signal referred to in paragraph 5.4.2.1.1. 5.3.3.2. In case of a failure within the control transmission, with the exception of those parts listed in paragraph 5.1.4., it shall still be possible to steer with the performance laid down in paragraph 6. for the intact steering system. 5.3.3.3. In the event of a failure of the energy source of the control transmission, it shall be possible to carry out at least 24 "figure of eight" manoeuvres, where each loop of the figure is 40 m diameter at 10 km/h speed and at the performance level given for an intact system in paragraph 6. The test manoeuvres shall begin at an energy storage level given in paragraph 5.3.3.5. 5.3.3.4. In the event of a failure within the energy transmission, with the exception of those parts listed in paragraph 5.3.1.1., there shall not be any immediate changes in steering angle. As long as the vehicle is capable of being driven at a speed greater than 10 km/h the requirements of paragraph 6. for the system with a failure shall be met after the completion of at least 25 "figure of eight" manoeuvres at 10 km/h minimum speed, where each loop of the figure is 40 m diameter. The test manoeuvres shall begin at an energy storage level given in paragraph 5.3.3.5. 5.3.3.5. The energy level to be used for the tests referred to in paragraphs 5.3.3.3. and 5.3.3.4. shall be the energy storage level at which a failure is indicated to the driver. ELI: http://data.europa.eu/eli/reg/2025/3/oj 19/83EN OJ L, 10.1.2025 In the case of electrically powered systems subject to Annex 6, this level shall be the worst case situation outlined by the manufacturer in the documentation submitted in connection with Annex 6 and shall take into account the effects of e.g. temperature and ageing on battery performance. 5.4. Warning signals 5.4.1. General provisions 5.4.1.1. Any fault which impairs the steering function and is not mechanical in nature shall be signalled clearly to the driver of the vehicle. Despite the requirements of paragraph 5.1.2. the deliberate application of vibration in the steering system may be used as an additional indication of a fault condition in this system. In the case of a motor vehicle, an increase in steering force is considered to be a warning indication; in the case of a trailer, a mechanical indicator is permitted. 5.4.1.2. Optical warning signals shall be visible, even by daylight and distinguishable from other alerts; the satisfactory condition of the signals shall be easily verifiable by the driver from the driver's seat; the failure of a component of the warning devices shall not entail any loss of the steering system's performance. 5.4.1.3. Acoustic warning signals shall be by continuous or intermittent sound signal or by vocal information. Where vocal information is employed, the manufacturer shall ensure that the alert uses the language(s) of the market into which the vehicle is sold. Acoustic warning signals shall be easily recognized by the driver. 5.4.1.4. If the same energy source is used to supply the steering system and other systems, an acoustic or optical warning shall be given to the driver, when the stored energy/fluid in the energy/storage reservoir drops to a level liable to cause an increase in steering effort. This warning may be combined with a device provided to warn of brake failure if the brake system uses the same energy source. The satisfactory condition of the warning device shall be easily verifiable by the driver. 5.4.2. Special provisions for full-power steering equipment 5.4.2.1. Power-driven vehicles shall be capable of providing steering failure and defect warning signals, as follows: 5.4.2.1.1. A red warning signal, indicating failures defined in paragraph 5.3.1.3. within the main steering equipment; 5.4.2.1.2. Where applicable, a yellow warning signal indicating an electrically detected defect within the steering equipment, which is not indicated by the red warning signal; 5.4.2.1.3. If a symbol is used, it shall comply with symbol J 04, ISO/IEC registration number 7000-2441 as defined in ISO 2575:2000; 5.4.2.1.4. The warning signal(s) mentioned above shall light up when the electrical equipment of the vehicle (and the steering system) is energised. With the vehicle stationary, the steering system shall verify that none of the specified failures or defects is present before extinguishing the signal. Specified failures or defects which should activate the warning signal mentioned above, but which are not detected under static conditions, shall be stored upon detection and be displayed at start-up and at all times when the ignition (start) switch is in the "on" (run) position, as long as the failure persists. 20/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.4.3. In the case where additional steering equipment is in operation and/or where the steering angle generated by that equipment has not been returned to normal driving position a warning signal shall be given to the driver. 5.5. Provisions for the periodic technical inspection of steering equipment 5.5.1. As far as practicable and subject to agreement between the vehicle manufacturer and the Type Approval Authority, the steering equipment and its installation shall be so designed that, without disassembly, its operation can be checked with, if necessary, commonly used measuring instruments, methods or test equipment. 5.5.2. It shall be possible to verify in a simple way the correct operational status of those Electronic Systems, which have control over steering. If special information is needed, this shall be made freely available. 5.5.2.1. At the time of type approval the means implemented to protect against simple unauthorized modification to the operation of the verification means chosen by the manufacturer (e.g. warning signal) shall be confidentially outlined. Alternatively this protection requirement is fulfilled when a secondary means of checking the correct operational status is available. 5.6. Provisions for ACSF Any ACSF shall be subject to the requirements of Annex 6. 5.6.1. Special provisions for ACSF of Category A Any ACSF of Category A shall fulfil the following requirements. 5.6.1.1. General 5.6.1.1.1. The system shall only operate until 10 km/h (+2 km/h tolerance) 5.6.1.1.2. The system shall be active only after a deliberate action of the driver and if the conditions for operation of the system are fulfilled (all associated functions – e.g. brakes, accelerator, steering, camera/radar/lidar – are working properly). 5.6.1.1.3. The system shall be able to be deactivated by the driver at any time. ELI: http://data.europa.eu/eli/reg/2025/3/oj 21/83EN OJ L, 10.1.2025 5.6.1.1.4. In case the system includes accelerator and/or braking control of the vehicle, the vehicle shall be equipped with a means to detect an obstacle (e.g. vehicles, pedestrian) in the manoeuvring area and to bring the vehicle immediately to a stop to avoid a collision.(5) 5.6.1.1.5. Whenever the system becomes operational, this shall be indicated to the driver. Any termination of control shall produce a short but distinctive driver warning by an optical warning signal and either an acoustic warning signal or by imposing a haptic warning signal (except for the signal on the steering control in parking manoeuvring). For RCP, the requirements for driver warning shown above shall be fulfilled by the provision of an optical warning signal at least at the remote control device. 5.6.1.2. Additional provisions for RCP 5.6.1.2.1. The parking manoeuvre shall be initiated by the driver but controlled by the system. A direct influence on steering angle, value of acceleration and deceleration via the remote-control device or by the movement of the driver shall not be possible. 5.6.1.2.2. Either a continuous actuation of the remote-control device by the driver or alternatively (for systems based on detection of driver position and movement) a continuous movement of the driver in the same longitudinal direction as the vehicle, is required during the parking manoeuvre. 5.6.1.2.3. For systems based on continuous actuation of the remote-control device, the vehicle shall stop immediately, if: (a) The continuous actuation is interrupted; (b) The distance between vehicle and remote-control device exceeds the specified maximum RCP operating range (S ); or RCPmax (c) The signal between remote control and vehicle is lost. For systems based on detection of driver position and movement, the vehicle shall stop immediately if: (a) The continuous movement of the driver is interrupted; (b) The distance between vehicle and remote-control device or driver exceeds the specified maximum RCP operating range (S ); RCPmax (c) The detection of the driver is lost; or (d) There is a rapid increase in the movement speed of the driver. 5.6.1.2.4. If a door or trunk of the vehicle is opened during the parking manoeuvre, the vehicle shall stop immediately. 5.6.1.2.5. If the vehicle has reached its final parking position, either automatically or by confirmation from the driver, and the start/run switch is in the off position, the parking braking system shall be automatically engaged. 5.6.1.2.6 At any time during a parking manoeuvre that the vehicle becomes stationary, the RCP function shall prevent the vehicle from rolling away. 5.6.1.2.7. The specified maximum RCP operating range shall not exceed 6 m. 5.6.1.2.8. The system shall be designed to be protected against unauthorized activation or operation of the RCP systems and interventions into the system. (5) Until uniform test procedures have been agreed, the manufacturer shall provide the Technical Service the documentation and supporting evidence to demonstrate compliance with these provisions. This information shall be subject to discussion and agreement between the Technical Service and vehicle manufacturer. 22/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.6.1.2.9. For RCP systems based on detection of driver position and movement, the deactivation referred to in paragraph 5.6.1.1.3. shall be trough a simple and obvious action that will be recognised by the system. 5.6.1.2.10 In the case that RCP is designed to operate in combination with a trailer, the manufacturer shall demonstrate to the Technical Service: — How the safety of this operation is ensured; — How S is enforced for different trailer lengths; RCPmax — How sensing is achieved with the trailer in place; and — How additional sensing capabilities are implemented (if applicable). 5.6.1.3. System information data 5.6.1.3.1. Following data shall be provided together with the documentation package required in Annex 6 to this Regulation to the Technical Service at the time of type approval: 5.6.1.3.1.1. The value for the specified maximum RCP operating range (S ); RCPmax 5.6.1.3.1.2. The conditions under which the system can be activated, i. e. when the conditions for operation of the system are fulfilled; 5.6.1.3.1.3. For RCP systems the manufacturer shall provide the technical authorities with an explanation how the system is protected against unauthorized activation. 5.6.1.3.1.4. For RCP systems based on detection of driver position and movement the manufacturer shall demonstrate to the technical service during type approval how a person is identified as the driver, how this person is tracked and how the driver initiates and terminates control. This shall be subject to agreement of the technical service. 5.6.2. Special Provisions for ACSF of Category B1 Any ACSF of Category B1 shall fulfil the following requirements. 5.6.2.1. General 5.6.2.1.1. The activated system shall at any time, within the boundary conditions, ensure that the vehicle does not cross a lane marking for lateral accelerations below the maximum lateral acceleration specified by the manufacturer ay . smax It is recognised that the maximum lateral acceleration specified by the vehicle manufacturer ay may not be smax achievable under all conditions (e.g. inclement weather, different tyres fitted to the vehicle, laterally sloped roads) The system shall not deactivate or unreasonably switch the control strategy in these other conditions. . The system may exceed the specified value ay by not more than 0.3 m/s2, while not exceeding the smax maximum value specified in the table in paragraph 5.6.2.1.3. of this Regulation. Notwithstanding the sentence above, for time periods of not more than 2 s the lateral acceleration of the system may exceed the specified value ay by not more than 40 per cent, while not exceeding the smax maximum value specified in the table in paragraph 5.6.2.1.3. of this Regulation by more than 0.3 m/s2. 5.6.2.1.2. The vehicle shall be equipped with a means for the driver to activate (standby mode) and deactivate (off mode) the system. It shall be possible to deactivate the system at any time by a single action of the driver. Following this action, the system shall only become active again as a result of a deliberate action by the driver. ELI: http://data.europa.eu/eli/reg/2025/3/oj 23/83EN OJ L, 10.1.2025 5.6.2.1.3. The system shall be designed so that excessive intervention of steering control is suppressed to ensure the steering operability by the driver and to avoid unexpected vehicle behaviour, during its operation. To ensure this, the following requirements shall be fulfilled: (a) The steering control effort necessary to override the directional control provided by the system shall not exceed 50 N; (b) The specified maximum lateral acceleration ay shall be within the limits as defined in the following smax table: Table 1 For vehicles of category M , N 1 1 > 100 - 130 km/ Speed range 10 - 60 km/h > 60 - 100 km/h > 130 km/h h Maximum value for the specified 3m/s2 3m/s2 3m/s2 3m/s2 maximum lateral acceleration Minimum value for the specified 0m/s2 0,5m/s2 0,8m/s2 0,3m/s2 maximum lateral acceleration For vehicles of category M , M , N , N 2 3 2 3 Speed range 10 - 30 km/h > 30 - 60 km/h > 60 km/h Maximum value for the specified 2,5m/s2 2,5m/s2 2,5m/s2 maximum lateral acceleration Minimum value for the specified 0m/s2 0,3m/s2 0,5m/s2 maximum lateral acceleration (c) The moving average over half a second of the lateral jerk generated by the system shall not exceed 5 m/s3. 5.6.2.1.4. The requirements in paragraphs 5.6.2.1.1. and 5.6.2.1.3. of this Regulation shall be tested in accordance with relevant vehicle test(s) specified in Annex 8 of this Regulation. 5.6.2.2. ACSF of Category B1 operation 5.6.2.2.1. If the system is active an optical signal shall be provided to the driver. 5.6.2.2.2. When the system is in standby mode, an optical signal shall be provided to the driver. 5.6.2.2.3. When the system reaches its boundary conditions set out in paragraph 5.6.2.3.1.1. of this Regulation (e.g. the specified maximum lateral acceleration ay ) and both in the absence of any driver input to the steering smax control and when any front tyre of the vehicle starts to cross the lane marking, the system shall avoid sudden loss of steering support by continuing to provide assistance to the extent possible as outlined in the safety concept of the vehicle manufacturer and shall clearly inform the driver about this system status by an optical warning signal and additionally by an acoustic or haptic warning signal. 24/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 For vehicles of categories M , M , N and N , the warning requirement above is deemed to be fulfilled if the 2 3 2 3 vehicle is equipped with a Lane Departure Warning System (LDWS) fulfilling the technical requirements of UN Regulation No. 130, the original version (00 series of amendments). 5.6.2.2.4. A system failure shall be signalled to the driver by an optical warning signal. However, when the system is manually deactivated by the driver, the indication of the failure may be suppressed. 5.6.2.2.5. When the system is active and in the speed range between 10 km/h or V , whichever is higher, and V , it smin smax shall provide a means of detecting that the driver is holding the steering control. If, after a period of no longer than 15 seconds the driver is not holding the steering control, an optical warning signal shall be provided. This signal may be the same as the signal specified below in this paragraph. The optical warning signal shall indicate to the driver to place their hands on the steering control. It shall consist of pictorial information showing hands and the steering control and may be accompanied by additional explanatory text or warning symbols - see examples below: If, after a period of no longer than 30 seconds the driver is not holding the steering control, at least the hands or steering control in the pictorial information provided as optical warning signal shall be shown in red and an acoustic warning signal shall be provided. The warning signals shall be active until the driver is holding the steering control, or until the system is deactivated, either manually or automatically. The system shall be automatically deactivated at the latest 30 seconds after the acoustic warning signal has started. After deactivation the system shall clearly inform the driver about the system status by an acoustic emergency signal which is different from the previous acoustic warning signal, for at least five seconds or until the driver holds the steering control again. The above requirements shall be tested in accordance with the relevant vehicle test(s) specified in Annex 8 to this Regulation. 5.6.2.2.6. Unless otherwise specified, the optical signals described in paragraph 5.6.2.2. shall all be different from each other (e.g. different symbol, colour, blinking, text). 5.6.2.3. System information data 5.6.2.3.1. Following data shall be provided together with the documentation package required in Annex 6 to this regulation to the Technical Service at the time of type approval; 5.6.2.3.1.1. The conditions under which the system can be activated and the boundaries for operation (boundary conditions). The vehicle manufacturer shall provide values for V , V and ay for every speed range as smax smin smax mentioned in the table of paragraph 5.6.2.1.3. of this Regulation; 5.6.2.3.1.2. Information about how the system detects that the driver is holding the steering control. ELI: http://data.europa.eu/eli/reg/2025/3/oj 25/83EN OJ L, 10.1.2025 5.6.2.3.1.3. Information about inputs other than lane markings (e.g. road boundaries, infrastructural separation, surrounding traffic, map data) that the system uses to reliably determine the course of the lane. 5.6.3. (Reserved for ACSF of Category B2) 5.6.4. Special Provisions for ACSF of Category C Power-driven vehicles equipped with an ACSF of Category C and trailers supporting lane change function(s) shall fulfil the relevant following requirements. 5.6.4.1. General 5.6.4.1.1. A power-driven vehicle equipped with an ACSF of Category C shall also be equipped with an ACSF of Category B1 complying with the requirements of this UN Regulation. 5.6.4.1.2. When the ACSF of Category C is in standby mode, the ACSF of Category B1 shall aim to centre the vehicle in the lane, unless a different position in lane is deemed reasonable due to the situation or resulting from driver input (e.g. when another vehicle is driving close beside). This shall be demonstrated by the vehicle manufacturer to the Technical Service during type approval. 5.6.4.2. Activation/deactivation of the ACSF of Category C system 5.6.4.2.1. The default status of the system shall be off at the initiation of each new engine start/run cycle. This requirement does not apply when a new engine start/run cycle is performed automatically, e.g. the operation of a stop/start system. 5.6.4.2.2. The vehicle shall be equipped with a means for the driver to activate (standby mode) and deactivate (off mode) the system. The same means as for an ACSF of Category B1 may be used. 5.6.4.2.3. The system shall only be activated (standby mode) after a deliberate action by the driver. Activation by the driver shall only be possible on roads where pedestrians and cyclists are prohibited and which, by design, are equipped with a physical separation that divides the traffic moving in opposite directions and which have at least two lanes in the direction the vehicles are driving. These conditions shall be ensured by the use of at least two independent means. In the case of a transition from a road type with a classification permitting an ACSF of Category C, to a type of road where an ACSF of Category C is not permitted, the system shall be deactivated automatically (off mode), unless a missing second lane in driving direction is the only condition not fulfilled from the above (e.g. a connector between two highways). Notwithstanding the activation and transition criteria above and following an activation request on any type of road by a deliberate action with the same means as for ACSF of Category B1, the ACSF of Category C may switch automatically to standby mode: (a) When the system has verified that the road is of a valid type as described above; and (b) In order to avoid distraction to the driver, not before the vehicle has reached a regular lane of travel. 26/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.6.4.2.4. It shall be possible to deactivate the system (off mode) at any time by a single action of the driver. Following this action, the system shall only be able to be reactivated (standby mode) by a deliberate action of the driver. 5.6.4.2.5. Notwithstanding the requirements above it shall be possible to perform the corresponding tests in Annex 8 of this Regulation on a test track. 5.6.4.3. Overriding A steering input by the driver shall override the steering action of the system. The steering control effort necessary to override the directional control provided by the system shall not exceed 50 N. The system may remain active, provided that priority is given to the driver during the overriding period. 5.6.4.4. Lateral acceleration The lateral acceleration induced by the system during the lane change manoeuvre: (a) Shall not exceed 1 m/s2 in addition to the lateral acceleration generated by the lane curvature, and (b) Shall not cause the total vehicle lateral acceleration to exceed the maximum values indicated in tables of paragraph 5.6.2.1.3. above. The moving average over half a second of the lateral jerk generated by the system shall not exceed 5 m/s3. 5.6.4.5. Human Machine Interface (HMI) 5.6.4.5.1. Unless otherwise specified, the optical signals identified in paragraph 5.6.4.5. shall be easily distinguishable from each other (e.g. different symbol, colour, blinking, text). 5.6.4.5.2. When the system is in standby mode (i.e. ready to intervene), an optical signal shall be provided to the driver. An automatic change into the standby mode as defined in paragraph 5.6.4.2.3 shall be indicated to the driver in a prominent and understandable way. This indication shall be different from the optical signal of the standby mode itself (e.g. an additional popup message, blinking indication) unless an off-mode indication is displayed at least after the activation. 5.6.4.5.3. When the lane change procedure is ongoing an optical signal shall be provided to the driver. 5.6.4.5.4. When the lane change procedure is suppressed, in accordance with paragraph 5.6.4.6.8., the system shall clearly inform the driver about this system status by an optical warning signal and additionally by an acoustic or haptic warning signal. In case the suppression is initiated by the driver, an optical warning is sufficient. 5.6.4.5.5. A system failure shall be signalled immediately to the driver by an optical warning signal. However, when the system is manually deactivated by the driver, the indication of failure mode may be suppressed. If a system failure occurs during a lane change manoeuvre, the failure shall be signalled to the driver by an optical, and an acoustic or haptic warning. 5.6.4.5.5.1. In case the vehicle is coupled to a trailer of Category O or O supporting lane change function(s), the system 3 4 failure signal transmitted from the trailer via the electric control line shall trigger the aforementioned warning signal accordingly. ELI: http://data.europa.eu/eli/reg/2025/3/oj 27/83EN OJ L, 10.1.2025 5.6.4.5.6. The system shall provide a means of detecting that the driver is holding the steering control and shall warn the driver in accordance with the warning strategy below: If, after a period of no longer than 3s after the initiation of the lane change procedure and before the start of the lane change manoeuvre, the driver is not holding the steering control, an optical warning signal shall be provided. This signal shall be the same as the signal specified in paragraph 5.6.2.2.5. above. The warning signal shall be active until the driver is holding the steering control, or until the system is deactivated, either manually or automatically according to 5.6.4.6.8. 5.6.4.6. Lane Change Procedure 5.6.4.6.1. The initiation of a lane change procedure of an ACSF of Category C shall only be possible if an ACSF of Category B1 is already active. 5.6.4.6.2. The lane change procedure requires, and shall start immediately after, a manual activation by the driver of the direction indicator to the intended side for the lane change. 5.6.4.6.3. When the lane change procedure starts, the ACSF of Category B1 shall be suspended and the ACSF of Category C shall carry on the lane keeping function of ACSF of category B1, until the lane change manoeuvre starts. 5.6.4.6.4. The lateral movement of the vehicle towards the intended lane shall not start earlier than 1.0 second after the start of the lane change procedure. Additionally, the lateral movement to approach the lane marking and the lateral movement necessary to complete the lane change manoeuvre, shall be completed as one continuous movement. The lane change manoeuvre shall be initiated either automatically or by a second deliberate action of the driver. A vehicle shall not be equipped with both these means of initiation. 5.6.4.6.4.1. Automatic initiation of the lane change manoeuvre In case of an automatic initiation the lane change manoeuvre shall commence between 3.0 seconds and 5.0 seconds after the manual activation of the procedure as described in paragraph 5.6.4.6.2. and shown in the Figure below. 28/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.6.4.6.4.2. Initiation of the lane change manoeuvre by a second deliberate action In case of an initiation by a second deliberate action the lane change manoeuvre shall commence between 3.0 and 7.0 seconds after the manual activation of the procedure as described in paragraph 5.6.4.6.2. Additionally, the lane change manoeuvre shall commence at the latest 3.0 seconds after the second deliberate action as shown in the Figure below. The control to operate the second deliberate action shall be located in the steering control area. 5.6.4.6.5. The lane change manoeuvre shall be completed in less than: (a) 5 seconds for M , N vehicle categories; 1 1 (b) 10 seconds for M , M , N , N vehicle categories. 2 3 2 3 5.6.4.6.6. Once the lane change manoeuvre has completed, ACSF of Category B1 lane keeping function shall resume automatically. 5.6.4.6.7. The direction indicator shall remain active throughout the whole period of the lane change manoeuvre and shall be automatically deactivated by the system no later than 0.5 seconds after the resumption of ACSF of Category B1 lane keeping function as described in paragraph 5.6.4.6.6. above. Automatic deactivation by the system of the direction indicator is required only if the lane change manoeuvre is initiated automatically, and if the direction indicator control is not fully engaged (latched position) during the lane change manoeuvre. 5.6.4.6.8. Suppression of the Lane Change Procedure 5.6.4.6.8.1. The lane change procedure shall be suppressed automatically by the system when at least one of the following situations occurs before the lane change manoeuvre has started: (a) The system detects a critical situation (as defined in paragraph 5.6.4.7.), (b) The system is overridden or switched off by the driver, (c) The system reaches its boundaries (e.g. lane markings are no longer detected), (d) The system has detected that the driver is not holding the steering control at the start of the lane change manoeuvre, ELI: http://data.europa.eu/eli/reg/2025/3/oj 29/83EN OJ L, 10.1.2025 (e) The direction indicator lamps are manually deactivated by the driver; (f) Following the deliberate action of the driver to start the procedure described in paragraph 5.6.4.6.2., the lane change manoeuvre has not commenced: (i) At the latest after 5.0 seconds, in the case of an automatic initiation, (ii) At the latest after 7.0 seconds, in the case of an initiation by a second deliberate action, (iii) At the latest after 3.0 seconds after the second deliberate action, in the case of an initiation by a second deliberate action, whatever is appropriate (g) The system, with an initiation of the lane change manoeuvre by a second deliberate action, has not detected the second deliberate action at the latest 5.0 seconds after the start of the lane change procedure. (h) The lateral movement described in paragraph 5.6.4.6.4. is not continuous. 5.6.4.6.8.2. Manual deactivation of the lane change procedure, using the manual control of the direction indicator, shall be possible for the driver at any time. 5.6.4.7. Critical situation A situation is deemed to be critical when, at the time a lane change manoeuvre starts, an approaching vehicle in the target lane would have to decelerate at a higher level than 3m/s2, 0.4 seconds after the lane change manoeuvre has started, to ensure the distance between the two vehicles is never less than that which the lane change vehicle travels in 1 second. The resulting critical distance at the start of the lane change manoeuvre shall be calculated using the following formula: S = (v - v ) * t + (v - v )2 / (2 * a) + v * t critical rear ACSF B rear ACSF ACSF G Where: v is The actual speed of the approaching vehicle or 130 km/h whatever value is lower rear v is The actual speed of the ACSF vehicle ACSF a = 3 m/s2 (Deceleration of the approaching vehicle) t = 0.4 s (Time after the start of the lane change manoeuvre at which the B deceleration of the approaching vehicle starts) t = 1 s (Remaining gap of the vehicles after the deceleration of the approaching G vehicle). 5.6.4.8. Minimum distance and minimum operation speed 5.6.4.8.1. Rear detection and minimum operation speed 5.6.4.8.1.1. Specific requirements applicable to power driven vehicles able to assist lane change in solo condition and to trailers of Category O or O supporting lane change function(s). 3 4 30/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 The ACSF of Category C shall be able to detect vehicles approaching from the rear in an adjacent lane up to a distance S as specified below: rear The minimum distance S shall be declared by the vehicle manufacturer. The declared value shall not be less rear than 55 m. The declared distance shall be tested according to the relevant test in Annex 8 using a two-wheeled motor vehicle of Category L 1 as the approaching vehicle. 3 Additionally, for trailers supporting lane change function, the detection area specified in paragraph 5.6.4.8.2. shall be extended to the sides of the trailer including the coupling device. 5.6.4.8.1.2. Specific requirements applicable to power-driven vehicles of Category N and N able to assist lane change 2 3 when coupled to a trailer of Category O or O supporting lane change functions: 3 4 (a) The detection area specified in paragraph 5.6.4.8.2. shall apply to the sides of the power-driven vehicle, while the detection behind the rearmost point of the vehicle shall be deemed optional. (b) The vehicle shall fulfil the requirements of paragraph 5.6.4.9. (c) The ACSF of Category C shall be deactivated (off mode) if the coupled trailer of Category O3 or O4 is not fulfilling the requirements of paragraph 5.6.4.9. (Unless the power-driven vehicle is able to assist lane change when coupled to a trailer not supporting lane change functions, as specified in paragraph 5.6.4.8.1.3.). 5.6.4.8.1.3. Specific requirements applicable to power-driven vehicles of Category N and N able to assist lane change 2 3 when coupled to a trailer of Category O or O not supporting lane change functions: 3 4 (a) The minimum distance S shall be declared by the vehicle manufacturer. The declared value shall be rear specified from to the rearmost point of the trailer and shall not be less than 55 m. The declared distance S shall be tested with a trailer not supporting lane change function(s) according rear to the relevant test in Annex 8 using a two-wheeled motor vehicle of Category L 1 as the approaching 3 vehicle. (b) The vehicle manufacturer shall also declare the maximum trailer length L up to which the power-driven T vehicle is able to perform a lane change manoeuvre. L shall be specified as the distance between the T coupling point of the trailer (e.g. the kingpin of a semi-trailer, the drawbar eye of a full-trailer) and its rearmost point. The power-driven vehicle shall use the relevant information(s) transmitted from the trailer (e.g. via the electric control line) to assess the actual length of the coupled trailer or alternatively from detection means belonging to the towing vehicle. In case the coupled trailer is longer than the maximum trailer length L or if the information of the actual trailer length is not available, the ACSF-C shall be deactivated T (off mode). The vehicle manufacturer shall demonstrate, to the satisfaction of the technical services (e.g. by simulating the relevant messages from the trailer), that the ACSF-C is deactivated once the trailer length is higher than the specified value L or the trailer length is not known by the power-driven vehicle. T (c) Additionally, the detection area specified in paragraph 5.6.4.8.2. shall be extended to the sides of the combination. ELI: http://data.europa.eu/eli/reg/2025/3/oj 31/83EN OJ L, 10.1.2025 5.6.4.8.1.4. The minimum operation speed V , down to which the ACSF of Category C is permitted to perform a lane smin change manoeuvre, shall be calculated with minimum distance S using the following formula: rear qffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi V Smin ¼ a�ðt B – t GÞ + vapp – a2�ðt B – t GÞ2 – 2�a�ðvapp�t G – SrearÞ Where: S is The minimum distance declared by the manufacturer in [m]; rear V = 36.1 m/s (The speed of the approaching vehicle is 130 km/h i.e. 36.1 m/s); app a = 3 m/s2 (Deceleration of the approaching vehicle); t = 0.4 s (Time after the start of the manoeuvre at which the deceleration of the B approaching vehicle starts); t = 1 s (Remaining gap of the vehicles after the deceleration of the G approaching vehicle); V in [m/s] is The resulting minimum activation speed of the ACSF of Category C. smin If the vehicle is operated in a country with a general maximum speed limit below 130 km/h, this speed limit may be used as an alternative for V in the above formula to calculate the minimum operation speed V . app smin In this case the vehicle shall be equipped with a means to detect the country of the operation and shall have information available on the general maximum speed limit of this country. Notwithstanding the requirements above in paragraph 5.6.4.8.1., the ACSF of Category C is permitted to perform a lane change manoeuvre at speeds lower than the calculated V provided that the following smin conditions are met: (a) The system has detected another vehicle in the adjacent lane into which the lane change is planned at a distance lower than S ; and rear (b) The situation is not deemed to be critical according to paragraph 5.6.4.7. (e.g. at low speed differences and V < 130 km/h); app (c) The declared value S is greater than the calculated value S from paragraph 5.6.4.7. above. rear critical 5.6.4.8.2. Detection area on ground level The vehicle system detection area on ground level shall be at minimum as shown in the figure below. 32/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.6.4.8.3. After each vehicle new engine start/run cycle (other than when performed automatically, e.g. the operation of a stop/start systems), the ACSF of Category C function shall be prevented by the power-driven vehicle from performing a lane change manoeuvre until the system of the power driven vehicle or the trailer (as relevant) has detected, at least once, a moving object at a distance greater than the minimum distance S declared by rear the manufacturer in paragraph 5.6.4.8.1. above. 5.6.4.8.4. The ACSF of Category C shall be able to detect blindness of the sensor (e.g. due to accumulation of dirt, ice or snow). The ACSF of Category C shall be prevented, upon detection of blindness on the power-driven vehicle or on the trailer, as relevant, from performing the lane change manoeuvre. The status of the system shall be signalled to the driver no later than on the initiation of the lane change procedure. The same warning as the one specified in paragraph 5.6.4.5.5. (system failure warning) may be used. 5.6.4.9. Connections, for ACSF between power-driven vehicle and trailer The following paragraphs apply to vehicles implementing lane change function(s) based on trailers supporting lane change function(s). 5.6.4.9.1. The data communication line shall conform to ISO 11992-1:2019 and ISO 11992-3:2021 and be a point-to- point type using: (a) The fifteen-pin connector according to ISO 12098; or, (b) In the case of systems where the connection of the electric control line is automated, the automated connector shall, as a minimum, provide the same number of pins as the abovementioned ISO 12098 connector. 5.6.4.9.1.1. The support of messages defined within ISO 11992-3:2021 is specified within Annex 9 to this Regulation for the power-driven vehicle and trailer as appropriate. 5.6.4.9.1.2. The functional compatibility of power-driven and towed vehicles equipped with electric control lines as defined above shall be assessed at the time of type approval by checking that the relevant provisions of ISO 11992-1:2019 and ISO 11992-3:2021 are fulfilled. Annex 10 of this Regulation provides an example of tests that may be used to perform this assessment. 5.6.4.9.1.3. When a power-driven vehicle is equipped with an electric control line connected to a trailer equipped with an electric control line, a continuous failure (> 40 ms) within the electric control line shall be detected in the power-driven vehicle and shall be signalled to the driver by the warning signal specified in paragraph 5.6.4.5.5., when such vehicles are connected via the electric control line. 5.6.4.9.1.4. The Power-driven vehicles shall be able to use the data transmitted from a trailer to perform the functionality and the performance of an ACSF of Category C and shall send the GPM 11 message to the trailer and receive the GPM 21 message prior to the enabling the ACSF-functionality of the motor vehicle if a trailer is coupled. ELI: http://data.europa.eu/eli/reg/2025/3/oj 33/83EN OJ L, 10.1.2025 5.6.4.9.2. Special provisions for trailers supporting lane change function(s). 5.6.4.9.2.1. The functionality shall be enabled only if GPM 11 message is received and GPM 21 messages are sent as defined in ISO 11992-3:2021. 5.6.4.9.2.2. If a trailer provides data communication via the electric control line and is equipped with ACSF-sensors it shall be in conformance to ISO 11992-3:2021 and according to the Annex 9 of this Regulation. Failure warning signals required from the trailer by this Regulation shall be activated via the above connector. The requirement to be applied to trailers with respect to the transmission of failure warning signals shall be those, as appropriate, which are prescribed for motor vehicles in paragraph 5.6.4.5.5. 5.6.4.9.2.3. A system failure in the trailer shall be transmitted to the motor vehicle. 5.6.4.10. System information data 5.6.4.10.1. The following data shall be provided, together with the documentation package required in Annex 6 of this UN Regulation, to the Technical Service at the time of type approval. 5.6.4.10.1.1. The conditions under which the system can be activated and the boundaries for operation (boundary conditions). The vehicle manufacturer shall provide values for V , V and ay for every speed range smax smin smax as mentioned in the table of paragraph 5.6.2.1.3. of this UN Regulation. 5.6.4.10.1.2. Information about how the system detects that the driver is holding the steering control. 5.6.4.10.1.3. The means to override and to suppress or cancel. 5.6.4.10.1.4. Information about how the failure warning signal status and the confirmation of the valid software version related ACSF performance can be checked via the use of an electronic communication interface.(6) 5.6.4.10.1.5. Documentation about which system software version related ACSF performance is valid. This documentation shall be updated whenever a software version was amended. 6 5.6.4.10.1.6. Information on the sensor range over lifetime. The sensor range shall be specified in such way that any influence on deterioration of the sensor shall not affect the fulfilment of paragraphs 5.6.4.8.3. and 5.6.4.8.4. of this UN Regulation. 5.6.4.11. The vehicle with ACSF of Category C shall be tested in accordance with relevant vehicle test(s) specified in Annex 8 of this UN Regulation. For driving situations not covered by the tests of Annex 8, the safe operation of the ACSF shall be demonstrated by the vehicle manufacturer on the base of Annex 6 of this UN Regulation. 5.7. Provisions for RCM fitted to vehicles of category M and N . 1 1 Any RCM shall be subject to the requirements of Annex 6. (6) This paragraph shall be reviewed once the Task Force on Cyber Security and Over the Air issues (TF CS/OTA) reporting to the World Forum for the Harmonization of Vehicle Regulations (WP.29) Informal Working Group on Intelligent Transport Systems/Automated Driving has finalized its work on measures for software identification and, if necessary, amended accordingly. 34/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.7.1. Vehicles of category M and N meeting the requirements of Category G(7) may be equipped with RCM 1 1 provided the system fulfils the following requirements. 5.7.1.1. The RCM function shall consist of software and hardware on a vehicle that enables the vehicle to be manoeuvred remotely, and an actuator that operates the function located on a separate remote-control device. 5.7.1.2. The RCM function shall be active only after a deliberate action of the driver and if the conditions for operation of the system are fulfilled (all associated functions – e.g. brakes, accelerator, steering, camera/ radar/lidar are working properly). 5.7.1.3. The RCM function shall only operate if there is a continuous actuation of a dedicated button/switch on the remote-control device by the driver. Another button/switch on the remote-control device may be used to control the manoeuvring of the vehicle. 5.7.1.4. Whenever the RCM function is operated, this shall be indicated to the driver by an optical signal at least at the remote-control device. 5.7.1.5. The RCM function shall only operate until 5 km/h (+1 km/h tolerance). 5.7.1.6. At any time during a manoeuvre that the vehicle becomes stationary, the RCM function shall prevent the vehicle from rolling away. 5.7.1.7. If the continuous actuation is interrupted or the distance between the vehicle and the remote control device exceeds the specified maximum RCM operating range (S ) or the secure connection between the RCMmax remote control device and the vehicle is lost, the vehicle shall stop immediately. 5.7.1.8. The specified maximum RCM operating range (S ) shall not exceed 6 m. RCMmax 5.7.1.9. It shall be possible for the driver to deactivate the RCM function at any time. 5.7.1.10. If a door or trunk of the vehicle is opened during the manoeuvre, the vehicle shall stop immediately, and the RCM function shall be deactivated. 5.7.1.11. Security 5.7.1.11.1 The RCM function shall be protected against unauthorized activation or operation of the RCM function and interventions into the function. 5.7.1.11.2 The connection between the remote-control device and the vehicle shall be secured and encrypted. It shall be ensured by technical means that the RCM function can only be operated by an authorised remote-control device. 5.7.1.12. System information data The Following data shall be provided together with the documentation package required in Annex 6 of this Regulation to the Technical Service at the time of type approval: 5.7.1.12.1. The value for the specified maximum RCM operating range (S ); RCMmax 5.7.1.12.2. The conditions under which the RCM function can be activated, i.e. when the conditions for operation of the system are fulfilled; (7) As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document ECE/TRANS/WP.29/78/Rev.6, para. 2 - https://unece.org/transport/standards/transport/vehicle-regulations-wp29/resolutions. ELI: http://data.europa.eu/eli/reg/2025/3/oj 35/83EN OJ L, 10.1.2025 5.7.1.12.3. The Manufacturer shall provide the technical authorities with an explanation of how the function is protected against unauthorized activation or operation. 5.7.1.13. The RCM function shall be so designed that its activation can only be achieved provided the vehicle is not in any of the following locations: (a) A public road/highway; (b) A public car park; (c) An area designated exclusively for use by pedestrians and/or pedal cyclists. The vehicle shall be capable of confirming that it is not located in any of the above locations whilst the RCM function is active and this shall be achieved by at least two independent technical means.(8) If navigation maps are used for this purpose, the RCM function shall be disabled if the map data has not been updated in the previous 12 months. 5.7.1.14. The vehicle shall be equipped with a means to detect an obstacle (e.g. vehicles, pedestrian) in the manoeuvring area and to bring the vehicle immediately to a stop to avoid a collision. 5.7.1.15. If the vehicle stops having detected an obstacle in the manoeuvring area, subsequent operation shall only be possible following confirmation from the driver. The vehicle shall respond to any subsequent objects detected in the manoeuvring area as prescribed in paragraph 5.7.1.14. 5.7.1.16. It shall only be possible to operate the RCM function when drive is provided to at least one front axle and one rear axle simultaneously. 5.7.1.17. The vehicle shall detect if, while the RCM function is active, the vehicle enters any of the locations listed under paragraph 5.7.1.13. In such a case, the vehicle shall stop immediately, and the RCM function shall be deactivated. 5.7.1.18. The RCM function shall only operate for a maximum total distance travelled of 100m. This distance may be reset if there is no input on the remote control device for at least 1 minute or if the system has been deactivated and a time period of at least 1 minute has elapsed. The distance shall be subsequently measured from the next point at which the RCM function is operated. 5.7.1.19. The driver shall be issued with a warning signal when the total distance travelled is 75m (+5m tolerance). This shall be fulfilled by the provision of an optical warning signal and either a haptic or acoustic warning signal at least at the remote control device. 5.7.1.20. If the vehicle reaches or exceeds the maximum total distance travelled defined in paragraph 5.7.1.18., the vehicle shall stop immediately and the RCM function shall be deactivated. It shall not be possible to subsequently activate the RCM function until a time period of at least 1 minute has elapsed. This shall be indicated to the driver at least at the remote control device. 5.7.1.21. The manufacturer shall provide the Technical Service with documentation and supporting evidence to demonstrate compliance with the provisions of paragraphs 5.7.1.13., 5.7.1.14., 5.7.1.15 and 5.7.1.17. This information shall be subject to discussion and agreement between the Technical Service and vehicle manufacturer. (8) Two different types of map (e.g. navigation and topographical) supplied by two different suppliers are satisfactory for this requirement. 36/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 5.8. Special Provisions for vehicles equipped with an Automated Driving System The steering equipment of any vehicle equipped with an Automated Driving System, other than Automated Lane Keeping Systems as defined in UN Regulation No. 157, shall fulfil the following requirements. 5.8.1. An ADS may control the vehicle’s steering equipment provided that the ADS is designed to comply with relevant national and/or international technical regulations and relevant national legislation governing operation, and provided that its activation is restricted by technical means to the jurisdiction(s) where these apply. Compliance with this requirement shall be declared by the manufacturer at the time of the application for approval. 5.8.2. Compliance with the applicable performance requirements of this UN Regulation whilst the ADS is active shall be demonstrated in accordance with Annex 6. 5.8.2.1. The transmission links between the ADS and the steering equipment (excluding the ADS itself), are subject to the requirements of Annex 6. 5.8.3. Whilst the ADS is active, detected faults as described in paragraph 5.4. of this UN Regulation shall be transmitted to the ADS. 5.8.3.1. Notwithstanding paragraph 5.4.1.1., faults which impair the steering function, and which can under manual driving conditions be detected by a driver due to vibration in the steering system or an increase in the steering force, shall be detected by the steering system and transmitted to the ADS unless the ADS itself is capable of detecting or sensing the presence of these faults. 6. Test provisions 6.1. General provisions 6.1.1. The test shall be conducted on a level surface affording good adhesion. 6.1.2. During the test(s), the vehicle shall be loaded to its technically permissible maximum mass and its technically permissible maximum load on the steered axle(s). In the case of axles fitted with ASE, this test shall be repeated with the vehicle loaded to its technically permissible maximum mass and the axle equipped with ASE loaded to its maximum permissible mass. 6.1.3. Before the test begins, the tyre pressures shall be as prescribed by the manufacturer for the mass specified in paragraph 6.1.2. when the vehicle is stationary. 6.1.4. In the case of any systems that use electrical energy for part or all of the energy supply, all performance tests shall be carried out under conditions of actual or simulated electrical load of all essential systems or systems components which share the same energy supply. Essential systems shall comprise at least lighting systems, windscreen wipers, engine management and braking systems. 6.2. Provisions for motor vehicles 6.2.1. It shall be possible to leave a curve with a radius of 50 m at a tangent without unusual vibration in the steering equipment at the following speed: Category M vehicles: 50 km/h; 1 Category M , M , N , N and N vehicles: 40 km/h or the maximum design speed if this is below the speeds given 2 3 1 2 3 above. ELI: http://data.europa.eu/eli/reg/2025/3/oj 37/83EN OJ L, 10.1.2025 6.2.2. When the vehicle is driven in a circle with its steered wheels at approximately half lock and a constant speed of at least 10 km/h, the turning circle shall remain the same or become larger if the steering control is released. 6.2.3. During the measurement of control effort, forces with a duration of less than 0.2 seconds shall not be taken into account. 6.2.4. The measurement of steering efforts on motor vehicles with intact steering equipment. 6.2.4.1. The vehicle shall be driven from straight ahead into a spiral at a speed of 10 km/h. The steering wheel control effort shall be measured at the nominal radius of the steering control until the position of the steering control corresponds to turning radius given in the table below for the particular category of vehicle with intact steering. One steering movement shall be made to the right and one to the left. 6.2.4.2. The maximum permitted steering time and the maximum permitted steering control effort with intact steering equipment are given in the table below for each category of vehicle. 6.2.5. The measurement of steering efforts on motor vehicles with a failure in the steering equipment. 6.2.5.1. The test described in paragraph 6.2.4. shall be repeated with a failure in the steering equipment. The steering effort shall be measured until the position of the steering control corresponds to the turning radius given in the table below for the particular category of vehicle with a failure in the steering equipment. 6.2.5.2. The maximum permitted steering time and the maximum permitted steering control effort with a failure in the steering equipment are given in the table below for each category of vehicle. Table 2 Steering control effort requirements Vehicle Category INTACT WITH A FAILURE Maximum effort Time(s) Turning Maximum Time(s) Turning Radius (daN) radius Effort (m) (m) (daN) M 15 4 12 30 4 20 1 M 15 4 12 30 4 20 2 M 20 4 12(**) 45(*) 6 20 3 N 20 4 12 30 4 20 1 N 25 4 12 40 4 20 2 N 20 4 12(**) 45(*) 6 20 3 (*) 50 for rigid vehicles with 2 or more steered axles excluding self tracking equipment (**) or full lock if 12 m radius is not attainable. 6.3. Provisions for trailers 6.3.1. The trailer shall travel without excessive deviation or unusual vibration in its steering equipment when the towing vehicle is travelling in a straight line on a flat and horizontal road at a speed of 80 km/h or the technically permissible maximum speed indicated by the trailer manufacturer if this is less than 80 km/h. 38/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 6.3.2. With the towing vehicle and trailer having adopted a steady state turn corresponding to a turning circle radius of 25 m (see paragraph 2.4.6.) at a constant speed of 5 km/h, the circle described by the rearmost outer edge of the trailer shall be measured. This manoeuvre shall be repeated under the same conditions but at a speed of 25 km/h ±1 km/h. During these manoeuvres, the rearmost outer edge of the trailer travelling at a speed of 25 km/h ±1 km/h shall not move outside the circle described at a constant speed of 5 km/h by more than 0.7 m. 6.3.3. No part of the trailer shall move more than 0.5 m beyond the tangent to a circle with a radius of 25 m when towed by a vehicle leaving the circular path described in paragraph 6.3.2. along the tangent and travelling at a speed of 25 km/h. This requirement shall be met from the point the tangent meets the circle to a point 40 m along the tangent. After that point the trailer shall fulfil the condition specified in paragraph 6.3.1. 6.3.4. The annular ground area swept by the towing vehicle/trailer combination with an intact steering system, driving at no more than 5 km/h in a constant radius circle with the front outer corner of the towing vehicle describing a radius of 0.67 x vehicle combination length but not less than 12.5 m is to be measured. 6.3.4.1. If, with a fault in the steering system, the measured swept annular width is > 8.3 m, then this shall not be an increase of more than 15 per cent compared with the corresponding value measured with the intact steering system. There shall not be any increase in the outer radius of the swept annular width. 6.3.5. The tests described in paragraphs 6.3.2., 6.3.3. and 6.3.4. shall be conducted in both clockwise and anti-clockwise directions. 7. Conformity of production The Conformity of Production Procedures shall comply with those set out in the 1958 Agreement, Schedule 1 (E/ ECE/TRANS/505/Rev.3) with the following requirements: 7.1. The holder of the approval shall ensure that results of the conformity of production tests are recorded and that the annexed documents remain available for a period determined in agreement with the Type Approval Authority or Technical Service. This period shall not exceed 10 years counted from the time when production is definitively discontinued; 7.2. The Type Approval Authority which has granted type approval or its Technical Service may at any time verify the conformity control methods applied in each production facility. The normal frequency of these verifications shall be once every two years. 8. Penalties for non-conformity of production 8.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be withdrawn if the requirement laid down in paragraph 7.1. is not complied with or if sample vehicles fail to comply with the requirements of paragraph 6. of this Regulation. 8.2. If a Contracting Party to the Agreement applying this Regulation withdraws an approval it has previously granted, it shall forthwith so notify the other Contracting Parties applying this Regulation, by means of a communication form conforming to the model in Annex 1 to this Regulation. 9. Modification and extension of approval of the vehicle type 9.1. Every modification of the vehicle type shall be notified to the Type Approval Authority which granted the approval. The Type Approval Authority may then either: 9.1.1. Consider that the modifications made are unlikely to have an appreciable adverse effect and that in any case the vehicle still complies with the requirements; or ELI: http://data.europa.eu/eli/reg/2025/3/oj 39/83EN OJ L, 10.1.2025 9.1.2. Require a further test report from the Technical Service responsible for conducting the tests. 9.2. Confirmation or extension or refusal of approval, specifying the alterations, shall be communicated by the procedure specified in paragraph 4.3. to the Parties to this Regulation. 9.3. The Type Approval Authority issuing the extension of approval shall assign a series number for such an extension and inform there of the other Parties to the 1958 Agreement applying this Regulation by means of a communication form conforming to the model in Annex 1 to this Regulation. 10. Production definitively discontinued If the holder of the approval completely ceases to manufacture a type of vehicle approved in accordance with this Regulation, he shall so inform the Type Approval Authority which granted the approval. Upon receiving the relevant communication that Type Approval Authority shall inform thereof the other Parties to the 1958 Agreement applying this Regulation by means of a communication form conforming to the model in Annex 1 to this Regulation. 11. Names and addresses of technical series responsible for conducting approval tests and of Type Approval Authorities The Contracting Parties to the 1958 Agreement applying this Regulation shall communicate to the United Nations Secretariat the names and addresses of the Technical Services responsible for conducting approval tests and of the Type Approval Authorities which grant approval and to which forms certifying approval or extension or refusal or withdrawal of approval, issued in other countries, are to be sent. 12. Transitional provisions 12.1. Transitional Provisions applicable to the 02 series of amendments: 12.1.1. As from the official date of entry into force of the 02 series of amendments, no Contracting Party applying this Regulation shall refuse to grant or refuse to accept UN type approvals under this Regulation as amended by the 02 series of amendments unless otherwise specified below. 12.1.2. As from 1 April 2018, Contracting Parties applying this Regulation shall not be obliged to accept UN type approvals to any preceding series of amendments, first issued after 1 April 2018. 12.1.3. Until 1 April 2021, Contracting Parties applying this Regulation shall continue to accept UN type approvals to the preceding series (01) of amendments to this Regulation, first issued before 1 April 2018. 12.1.4. As from 1 April 2021, Contracting Parties applying this Regulation shall not be obliged to accept UN type approvals issued to the preceding series of amendments to this Regulation. 12.1.5. Notwithstanding paragraph 12.1.4., UN type approvals to the preceding series of amendments to this Regulation, which are not affected by the 02 series of amendments shall remain valid and Contracting Parties applying this Regulation shall continue to accept them. 12.1.6. Until 1 April 2020, type approvals according to the 02 series of amendment to this Regulation may be granted to new vehicle types not complying with the red colour for the hands-off warning signal, mandated in paragraph 5.6.2.2.5., and having multi information displays installed in the instrument cluster not capable of indicating red waning signals or using standalone tell-tales only. 40/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 12.2. Transitional Provisions applicable to the 03 series of amendments: 12.2.1. As from the official date of entry into force of the 03 series of amendments, no Contracting Party applying this Regulation shall refuse to grant or refuse to accept UN type approvals under this Regulation as amended by the 03 series of amendments. 12.2.2. As from 1 September 2019, Contracting Parties applying this Regulation shall not be obliged to accept UN type approvals to the preceding series (02) of amendments, first issued after 1 September 2019. 12.2.3. Until 1 September 2021, Contracting Parties applying this Regulation shall continue to accept UN type approvals to the preceding series (02) of amendments to this Regulation, first issued before 1 September 2019. 12.2.4. As from 1 September 2021, Contracting Parties applying this Regulation shall not be obliged to accept type approval issued to the preceding series of amendments to this Regulation. 12.2.5. Notwithstanding paragraph and 12.2.4., Contracting Parties applying this Regulation shall continue to accept UN type approvals issued according to a preceding series of amendments to this Regulation, for vehicles which are not affected by the provisions introduced with the 03 series of amendments. 12.3. Transitional Provisions applicable to the 04 series of amendments: 12.3.1. As from the official date of entry into force of the 04 series of amendments, no Contracting Party applying this Regulation shall refuse to grant or refuse to accept UN type approvals under this Regulation as amended by the 04 series of amendments. 12.3.2. As from 1 September 2023, Contracting Parties applying this Regulation shall not be obliged to accept UN type approvals to the preceding series of amendments, first issued after 1 September 2023. 12.3.3. Until 1 September 2025, Contracting Parties applying this Regulation shall continue to accept UN type approvals to the preceding series of amendments to this Regulation, first issued before 1 September 2023. 12.3.4. As from 1 September 2025, Contracting Parties applying this Regulation shall not be obliged to accept type approvals issued to the preceding series of amendments to this Regulation. 12.3.5. Notwithstanding paragraph 12.3.2. and 12.3.4., Contracting Parties applying this Regulation shall continue to accept UN type approvals issued according to a preceding series of amendments to this Regulation, for vehicles which are not affected by the provisions of paragraph 5.1.6.3.9. introduced with the 04 series of amendments. 12.4. General transitional provisions: 12.4.1. Contracting Parties applying this Regulation shall not refuse to grant UN type approvals according to any preceding series of amendments to this Regulation or extensions thereof. ELI: http://data.europa.eu/eli/reg/2025/3/oj 41/83EN OJ L, 10.1.2025 ANNEX 1 Communication (Maximum format: A4 (210 × 297 mm) issued by: Name of administration: .................................... .................................... .................................... () Concerning:(2) Approval granted Approval extended Approval refused Approval withdrawn Production definitively discontinued of a vehicle type with regard to steering equipment pursuant to UN Regulation No. 79 Approval No. ................................................................................................................. 1. Trade name or mark of vehicle ......................................................................................... 2. Vehicle type ............................................................................................................ 3. Manufacturer's name and address ...................................................................................... 4. If applicable, name and address of manufacturer's representative ...................................................... 5. Brief description of the steering equipment ............................................................................ 5.1. Type of steering equipment ............................................................................................ 5.2. Steering control ........................................................................................................ 5.3. Steering transmission .................................................................................................. 5.4. Steered wheels ......................................................................................................... 5.5. Energy source .......................................................................................................... 5.6. Vehicle is equipped with an ADS: ...............................................................................yes/no 6. Results of tests, vehicle characteristics ................................................................................. 6.1. Steering effort required to achieve a turning circle of 12 m radius with an intact system and 20 m radius with a system in the failed condition .......................................................................................... 6.1.1. Under normal conditions .............................................................................................. (1) Distinguishing number of the country which has granted/extended/refused/withdrawn approval (see approval provisions in this Regulation). (2) Strike out what does not apply. 42/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 6.1.2. After failure of special equipment ...................................................................................... 6.2. Other tests required by this Regulation ......................................................................pass/fail2 6.3. Adequate documentation in accordance with Annex 6 was supplied in respect of the following parts of the steering system: ................................................................................................................. 7. Applicable only to towing vehicles 7.1. The towing vehicle is/is not2 equipped with an electrical connector fulfilling the relevant requirements of Annex 7 7.2. The maximum current available is ................................................................................A(3) 7.3. The power-driven vehicle is equipped with an ACSF of Category C (yes/no). If yes: 7.3.1. The power-driven vehicle supports lane changes according to paragraph 5.6.4.8.1.1. - system in solo condition (i.e. without being coupled to a trailer of Category O or O ) (yes/no) 3 4 7.3.2. The power-driven vehicle supports lane changes when coupled to a trailer supporting lane change function(s) according to paragraph 5.6.4.8.1.2. and 5.6.4.9.2. (yes/no) 7.3.3. The power-driven vehicle supports lane changes when coupled to a trailer by fulfilling paragraph 5.6.4.8.1.3. without support of the trailer. This also includes the case, if the power-driven vehicle does not use the support of a trailer supporting lane change function(s) according to paragraph 5.6.4.8.1.1. and 5.6.4.9.2. (yes/no) 8. Applicable only to trailers 8.1. The steering system of the trailer fulfils the relevant provisions of Annex 7 to UN Regulation No. 79 ....... Yes/No2 8.2. The maximum current required for the trailer steering system is ...................................................A3 8.3. The trailer steering system is/is not2 able to supply auxiliary equipment on the trailer with electrical energy. 8.4. The trailer is equipped with an ACSF of Category C supporting lane change function(s) according to paragraph 5.6.4.8.1.1. and 5.6.4.9.2. and the Annex 9 (yes/no) 9. Vehicle submitted for approval on ..................................................................................... 10. Technical Service responsible for conducting approval tests ........................................................... 11. Date of report issued by that service ................................................................................... 12. Number of report issued by that service ............................................................................... 13. Approval granted/extended/refused/withdrawn2 14. Position of approval mark on vehicle .................................................................................. 15. Place ................................................................................................................... (3) As defined by the vehicle manufacturer – see paragraphs 2.3. and 3.1. of Annex 7 as appropriate. ELI: http://data.europa.eu/eli/reg/2025/3/oj 43/83EN OJ L, 10.1.2025 16. Date .................................................................................................................... 17. Signature ............................................................................................................... 18. Annexed to this communication is a list of documents in the approval file deposited at the administration services having delivered the approval and which can be obtained upon request. 44/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 ANNEX 2 Arrangements of approval marks MODEL A (See paragraph 4.4. of this Regulation) a = 8 mm min The above approval mark affixed to a vehicle shows that the vehicle type concerned has, with regard to steering equipment, been approved in the Netherlands (E 4) pursuant to UN Regulation No. 79 under approval No. 042439. The approval number indicates that the approval was granted in accordance with the requirements of UN Regulation No. 79 incorporating the 04 series of amendments. MODEL B (See paragraph 4.5. of this Regulation) a = 8 mm min The above approval mark affixed to a vehicle shows that the vehicle type concerned has been approved in the Netherlands (E 4) pursuant to Regulations Nos. 79 and 31.(1) The approval numbers indicate that, at the dates when the respective approvals were given, UN Regulation No. 79 incorporating the 04 series of amendments and UN Regulation No. 31 included the 02 series of amendments. (1) The second number is given merely as an example. ELI: http://data.europa.eu/eli/reg/2025/3/oj 45/83EN OJ L, 10.1.2025 ANNEX 3 Braking performance for vehicles using the same energy source to supply steering equipment and braking device 1. For tests carried out in accordance with this annex the following vehicle conditions shall be met: 1.1. The vehicle shall be loaded to its technically permissible maximum mass distributed between the axles as declared by the vehicle manufacturer. Where provision is made for several arrangements of the mass on the axles, the distribution of the maximum mass between the axles shall be such that the mass on each axle is proportional to the maximum permissible mass for each axle. In the case of tractors for semi-trailers, the mass may be repositioned approximately half way between the kingpin position resulting from the above loading conditions and the centreline of the rear axle(s); 1.2. The tyres shall be inflated to the cold inflation pressure prescribed for the mass to be borne by the tyres when the vehicle is stationary; 1.3. Before the start of the tests the brakes shall be cold, that is, with a disc or outer brake drum surface temperature less than 100 oC. 2. If an energy source failure occurs, service braking performance on the first brake application shall achieve the values given in the table below. Table 3 Category V (km/h) Service braking (m/s2) F (daN) M 100 6,43 50 1 M and M 60 5,0 70 2 3 (i) 80 5,0 70 N (a),(b) 1 (ii) 100 6,43 50 N and N 60 5,0 70 2 3 (a) The applicant shall select the appropriate row (i) or (ii) and this choice shall be subject to the agreement of the Technical Service. (b) Information: The values in row (i) are aligned with the corresponding provisions in UN Regulation No. 13, the values in row (ii) are aligned with the corresponding provisions in UN Regulation No. 13-H. 3. After any failure in the steering equipment, or the energy supply, it shall be possible after eight full stroke actuations of the service brake control, to achieve at the ninth application, at least the performance prescribed for the secondary (emergency) braking system (see table below). In the case where secondary performance requiring the use of stored energy is achieved by a separate control, it shall still be possible after eight full stroke actuations of the service brake control to achieve at the ninth application, the residual performance (see table below). Table 4 Secondary and residual efficiency Category V (km/h) Secondary braking (m/s2) Residual braking (m/s2) M 100 2,44 - 1 M and M 60 2,5 1,5 2 3 46/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 Category V (km/h) Secondary braking (m/s2) Residual braking (m/s2) (i) 70 2,2 1,3 N (a),(b) 1 (ii) 100 2,44 - N 50 2,2 1,3 2 N 40 2,2 1,3 3 (a) The applicant shall select the appropriate row (i) or (ii) and this choice shall be subject to the agreement of the Technical Service. (b) Information: The values in row (i) are aligned with the corresponding provisions in UN Regulation No. 13, the values in row (ii) are aligned with the corresponding provisions in UN Regulation No. 13-H. ELI: http://data.europa.eu/eli/reg/2025/3/oj 47/83EN OJ L, 10.1.2025 ANNEX 4 Additional provisions for vehicles equipped with Auxiliary Steering Equipment 1. General Provisions Vehicles fitted with Auxiliary Steering Equipment (ASE) in addition to the requirements given in the body of this Regulation shall also comply with the provisions of this annex. 2. Specific Provisions 2.1. Transmission 2.1.1. Mechanical steering transmissions Paragraph 5.3.1.1. of this Regulation applies. 2.1.2. Hydraulic steering transmissions The hydraulic steering transmission shall be protected from exceeding the maximum permitted service pressure T. 2.1.3. Electric steering transmissions The electric steering transmission shall be protected from excess energy supply. 2.1.4. Combination of steering transmissions A combination of mechanical, hydraulic and electric transmissions shall comply with the requirements specified in paragraphs 2.1.1., 2.1.2. and 2.1.3. above. 2.2. Testing requirements for failure 2.2.1. Malfunction or failure of any part of the ASE (except for parts not considered to the susceptible to breakdown as specified in paragraph 5.3.1.1. of this Regulation) shall not result in a sudden significant change in vehicle behaviour and the relevant requirements of paragraph 6. of this Regulation shall still be met. Furthermore, it shall be possible to control the vehicle without abnormal steering correction. This shall be verified by the following tests: 2.2.1.1. Circular test The vehicle shall be driven into a test circle with a radius "R" m and a speed "v" km/h corresponding to its category and the values given in the table below: Table 5 Vehicle category R(3) v(1),(2) M and N 100 80 1 1 M and N 50 50 2 2 M and N 50 45 3 3 (1) If the ASE is in a mechanically locked position at this specified speed, the test speed will be modified to correspond to the maximum speed where the system is functioning. Maximum speed means the speed when the ASE becomes locked minus 5 km/h. (2) If the dimensional characteristics of the vehicle imply an overturning risk, the manufacturer shall provide to the Technical Service behaviour simulation data demonstrating a lower maximum safe speed for conducting the test. Then the Technical Service will choose this test speed. (3) If, due to the configuration of the test site, the values of the radii cannot be observed, the tests may be carried out on tracks with other radii, (maximum variation: ± 25 per cent) provided that the speed is varied to obtain the transverse acceleration resulting from the radius and speed indicated in the table for the particular category of vehicle. 48/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 The failure shall be introduced when the specified test speed has been reached. The test shall include driving in a clockwise direction, and in a counter-clockwise direction. 2.2.1.2. Transient test 2.2.1.2.1. Until uniform test procedures have been agreed, the vehicle manufacturer shall provide the Technical Services with their test procedures and results for transient behaviour of the vehicle in the case of failure. 2.3. Warning signals in case of failure. 2.3.1. Except for parts of ASE not considered susceptible to breakdown as specified in paragraph 5.3.1.1. of this Regulation, the following failure of ASE shall be clearly brought to the attention of the driver. 2.3.1.1. A general cut-off of the ASE electrical or hydraulic control. 2.3.1.2. Failure of the ASE energy supply. 2.3.1.3. A break in the external wiring of the electrical control if fitted. ELI: http://data.europa.eu/eli/reg/2025/3/oj 49/83EN OJ L, 10.1.2025 ANNEX 5 Provisions for trailers having hydraulic steering transmissions 1. General provisions Vehicles fitted with hydraulic steering transmission, in addition to the requirements given in the body of this Regulation shall also comply with the provisions of this annex. 2. Specific provisions 2.1. Performance of hydraulic lines and hose assemblies. 2.1.1. The hydraulic lines of hydraulic transmission shall be capable of a burst pressure at least four times the maximum normal service pressure (T) specified by the vehicle manufacturer. Hose assemblies shall comply with ISO Standards 1402:1994, 6605:1986 and 7751:1991. 2.2. In systems dependent on an energy supply; 2.2.1. The energy supply shall be protected from excess pressure by a pressure limiting valve which operates at the pressure T. 2.3. Protection of steering transmission; 2.3.1. The steering transmission shall be protected from excess pressure by a pressure limiting valve which operates at between 1.1 T and 2.2 T. The operating pressure of the pressure limiting valve shall be of a value that is compatible with the operating characteristics of the steering system installed on the vehicle. This shall be confirmed by the vehicle manufacturer at the time of type approval. 50/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 ANNEX 6 Special requirements to be applied to the safety aspects of electronic control systems 1. General This annex defines the special requirements for documentation, fault strategy and verification with respect to the safety aspects of Electronic System(s) (paragraph 2.3.) and Complex Electronic Vehicle Control System(s) (paragraph 2.4. below) as far as this Regulation is concerned. This annex shall also apply to safety related functions identified in this Regulation which are controlled by electronic system(s) (paragraph 2.3.) as far as this Regulation is concerned. This annex does not specify the performance criteria for "The System" but covers the methodology applied to the design process and the information which must be disclosed to the Technical Service, for type approval purposes. This information shall show that "The System" respects, under non-fault and fault conditions, all the appropriate performance requirements specified elsewhere in this Regulation and that it is designed to operate in such a way that it does not induce safety critical risks. The applicant (e.g. the manufacturer) may provide evidence that an Auxiliary Steering Equipment (ASE) (if fitted) has previously been assessed as part of an approval in accordance with the requirements of Annex 4 of this Regulation (as required under the original version of this Regulation, its 01 or its 02 series of amendments). In this case, the requirements of this Annex shall not be applied to that ASE for the purposes of an approval in accordance with the 03 series of amendments. 2. Definitions For the purposes of this annex, 2.1. The System"means an electronic control system or complex electronic control system that provides or forms part of the control transmission of a function to which this Regulation applies. This also includes any other system covered in the scope of this Regulation, as well as transmission links to or from other systems that are outside the scope of this Regulation, that acts on a function to which this Regulation applies." 2.2. "Safety Concept" is a description of the measures designed into the system, for example within the electronic units, so as to address system integrity and thereby ensure safe operation under fault and non-fault conditions, including in the event of an electrical failure. The possibility of a fall-back to partial operation or even to a back-up system for vital vehicle functions may be a part of the safety concept. 2.3. "Electronic control system" means a combination of units, designed to co-operate in the production of the stated vehicle control function by electronic data processing. Such systems, commonly controlled by software, are built from discrete functional components such as sensors, electronic control units and actuators and connected by transmission links. They may include mechanical, electro-pneumatic or electro-hydraulic elements. 2.4. "Complex Electronic Vehicle Control Systems" are those electronic control systems in which a function controlled by an electronic system or the driver may be over-ridden by a higher level electronic control system/function. A function which is over-ridden becomes part of the complex system, as well as any overriding system/function within the scope of this Regulation. The transmission links to and from overriding systems/function outside of the scope of this Regulation shall also be included. ELI: http://data.europa.eu/eli/reg/2025/3/oj 51/83EN OJ L, 10.1.2025 2.5. "Higher-Level Electronic Control" systems/functions are those which employ additional processing and/or sensing provisions to modify vehicle behaviour by commanding variations in the function(s) of the vehicle control system. This allows complex systems to automatically change their objectives with a priority which depends on the sensed circumstances. 2.6. "Units" are the smallest divisions of system components which will be considered in this annex, since these combinations of components will be treated as single entities for purposes of identification, analysis or replacement. 2.7. "Transmission links" are the means used for inter-connecting distributed units for the purpose of conveying signals, operating data or an energy supply. This equipment is generally electrical but may, in some part, be mechanical, pneumatic or hydraulic. 2.8. "Range of control" refers to an output variable and defines the range over which the system is likely to exercise control. 2.9. "Boundary of functional operation" defines the boundaries of the external physical limits within which the system is able to maintain control. 2.10. "Safety Related Function" means a function of "The System" that is capable of changing the dynamic behaviour of the vehicle. "The System" may be capable of performing more than one safety related function. 2.11. "Control strategy" means a strategy to ensure robust and safe operation of the function(s) of "The System" in response to a specific set of ambient and/or operating conditions (such as road surface condition, traffic intensity and other road users, adverse weather conditions, etc.). This may include the automatic deactivation of a function or temporary performance restrictions (e.g. a reduction in the maximum operating speed, etc.). 3. Documentation 3.1. Requirements The manufacturer shall provide a documentation package which gives access to the basic design of "The System" and the means by which it is linked to other vehicle systems or by which it directly controls output variables. The function(s) of "The System", including the control strategies, and the safety concept, as laid down by the manufacturer, shall be explained. Documentation shall be brief, yet provide evidence that the design and development has had the benefit of expertise from all the system fields which are involved. For periodic technical inspections, the documentation shall describe how the current operational status of "The System" can be checked. The Technical Service shall assess the documentation package to show that "The System": (a) Is designed to operate, under non-fault and fault conditions, in such a way that it does not induce safety critical risks; (b) Respects, under non-fault and fault conditions, all the appropriate performance requirements specified elsewhere in this Regulation; and, (c) Was developed according to the development process/method declared by the manufacturer and that this includes at least the steps listed in paragraph 3.4.4. 3.1.1. Documentation shall be made available in two parts: (a) The formal documentation package for the approval, containing the material listed in paragraph 3. (with the exception of that of paragraph 3.4.4.) which shall be supplied to the Technical Service at the time of submission of the type approval application. This documentation package shall be used by the Technical Service as the basic reference for the verification process set out in paragraph 4. of this annex. The Technical Service shall ensure that this documentation package remains available for a period determined in agreement with the Approval Authority. This period shall be at least 10 years counted from the time when production of the vehicle is definitely discontinued. 52/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 (b) Additional material and analysis data of paragraph 3.4.4. which shall be retained by the manufacturer, but made open for inspection at the time of type approval. The manufacturer shall ensure that this material and analysis data remains available for a period of 10 years counted from the time when production of the vehicle is definitely discontinued." 3.2. Description of the functions of "The System" including control strategies A description shall be provided which gives a simple explanation of all the functions including control strategies of "The System" and the methods employed to achieve the objectives, including a statement of the mechanism(s) by which control is exercised. Any described function that can be over-ridden shall be identified and a further description of the changed rationale of the function’s operation provided. Any enabled or disabled safety related functions providing assistance to the driver as defined in paragraph 2.3.4. of this Regulation, when the hardware and software are present in the vehicle at the time of production, shall be declared and are subject to the requirements of this annex, prior to their use in the vehicle. 3.2.1. A list of all input and sensed variables shall be provided and the working range of these defined, along with a description of how each variable affects system behaviour. 3.2.2. A list of all output variables which are controlled by "The System" shall be provided and an indication given, in each case, of whether the control is direct or via another vehicle system. The range of control (paragraph 2.7.) exercised on each such variable shall be defined. 3.2.3. Limits defining the boundaries of functional operation (paragraph 2.8.) shall be stated where appropriate to system performance. 3.3. System layout and schematics 3.3.1. Inventory of components. A list shall be provided, collating all the units of "The System" and mentioning the other vehicle systems which are needed to achieve the control function in question. An outline schematic showing these units in combination, shall be provided with both the equipment distribution and the interconnections made clear. 3.3.2. Functions of the units The function of each unit of "The System" shall be outlined and the signals linking it with other units or with other vehicle systems shall be shown. This may be provided by a labelled block diagram or other schematic, or by a description aided by such a diagram. 3.3.3. Interconnections Interconnections within "The System" shall be shown by a circuit diagram for the electric transmission links, by a piping diagram for pneumatic or hydraulic transmission equipment and by a simplified diagrammatic layout for mechanical linkages. The transmission links both to and from other systems shall also be shown 3.3.4. Signal flow, operating data and priorities There shall be a clear correspondence between transmission links and the signals between Units. Priorities of signals on multiplexed data paths shall be stated wherever priority may be an issue affecting performance or safety. ELI: http://data.europa.eu/eli/reg/2025/3/oj 53/83EN OJ L, 10.1.2025 3.3.5. Identification of units Each unit shall be clearly and unambiguously identifiable (e.g. by marking for hardware and marking or software output for software content) to provide corresponding hardware and documentation association. Where functions are combined within a single unit or indeed within a single computer, but shown in multiple blocks in the block diagram for clarity and ease of explanation, only a single hardware identification marking shall be used. The manufacturer shall, by the use of this identification, affirm that the equipment supplied conforms to the corresponding document. 3.3.5.1. The identification defines the hardware and software version and, where the latter changes such as to alter the function of the Unit as far as this Regulation is concerned, this identification shall also be changed. 3.4. Safety concept of the manufacturer 3.4.1. The Manufacturer shall provide a statement which affirms that the strategy chosen to achieve "The System" objectives will not, under non-fault conditions, prejudice the safe operation of the vehicle. 3.4.2. In respect of software employed in "The System", the outline architecture shall be explained and the design methods and tools used shall be identified. The manufacturer shall show evidence of the means by which they determined the realisation of the system logic, during the design and development process. 3.4.3. The Manufacturer shall provide the Technical Service with an explanation of the design provisions built into "The System" so as to generate safe operation under fault conditions. Possible design provisions for failure in "The System" are for example: (a) Fall-back to operation using a partial system. (b) Change-over to a separate back-up system. (c) Removal of the high level function. In case of a failure, the driver shall be warned for example by warning signal or message display. When the system is not deactivated by the driver, e.g. by turning the ignition (run) switch to "off", or by switching off that particular function if a special switch is provided for that purpose, the warning shall be present as long as the fault condition persists. 3.4.3.1. If the chosen provision selects a partial performance mode of operation under certain fault conditions, then these conditions shall be stated and the resulting limits of effectiveness defined. 3.4.3.2. If the chosen provision selects a second (back-up) means to realise the vehicle control system objective, the principles of the change-over mechanism, the logic and level of redundancy and any built in back-up checking features shall be explained and the resulting limits of back-up effectiveness defined. 3.4.3.3. If the chosen provision selects the removal of the Higher Level Function, all the corresponding output control signals associated with this function shall be inhibited, and in such a manner as to limit the transition disturbance. 3.4.4. The documentation shall be supported, by an analysis which shows, in overall terms, how the system will behave on the occurrence of any of those hazards or faults which will have a bearing on vehicle control performance or safety. The chosen analytical approach(es) shall be established and maintained by the Manufacturer and shall be made open for inspection by the Technical Service at the time of the type approval. 54/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 The Technical Service shall perform an assessment of the application of the analytical approach(es). The assessment shall include: (a) Inspection of the safety approach at the concept (vehicle) level with confirmation that it includes consideration of: (i) Interactions with other vehicle systems;. (ii) Malfunctions of the system, within the scope of this Regulation; (iii) For functions defined in paragraph 2.3.4. of this Regulation: a. Situations when a system free from faults may create safety critical risks (e.g. due to a lack of or wrong comprehension of the vehicle environment); b. Reasonably foreseeable misuse by the driver; c. Intentional modification of the system. This approach shall be based on a Hazard / Risk analysis appropriate to system safety. (b) Inspection of the safety approach at the system level. This may be based on a Failure Mode and Effect Analysis (FMEA), a Fault Tree Analysis (FTA) or any similar process appropriate to system safety. (c) Inspection of the validation plans and results. This shall include validation testing appropriate for validation, for example, Hardware in the Loop (HIL) testing, vehicle on-road operational testing, or any other testing appropriate for validation. The assessment shall consist of spot checks of selected hazards and faults to establish that argumentation supporting the safety concept is understandable and logical and validation plans are suitable and have been completed. The Technical Service may perform or may require to perform tests as specified in paragraph 4. to verify the safety concept. 3.4.4.1. This documentation shall itemize the parameters being monitored and shall set out, for each fault condition of the type defined in paragraph 3.4.4. of this annex, the warning signal to be given to the driver and/or to service/ technical inspection personnel. 3.4.4.2. This documentation shall describe the measures in place to ensure the "The System" does not prejudice the safe operation of the vehicle when the performance of "The System" is affected by environmental conditions e.g. climatic, temperature, dust ingress, water ingress, ice packing. 4. Verification and test 4.1. The functional operation of "The System", as laid out in the documents required in paragraph 3., shall be tested as follows: 4.1.1. Verification of the function of "The System" The Technical Service shall verify "The System" under non-fault conditions by testing a number of selected functions from those described by the manufacturer in paragraph 3.2. above. For complex electronic systems, these tests shall include scenarios whereby a declared function is overridden. 4.1.1.1. The verification results shall correspond with the description, including the control strategies, provided by the manufacturer in paragraph 3.2. 4.1.2. Verification of the safety concept of paragraph 3.4. ELI: http://data.europa.eu/eli/reg/2025/3/oj 55/83EN OJ L, 10.1.2025 The reaction of "The System" shall be checked under the influence of a failure in any individual unit by applying corresponding output signals to electrical units or mechanical elements in order to simulate the effects of internal faults within the unit. The Technical Service shall conduct this check for at least one individual unit, but shall not check the reaction of "The System" to multiple simultaneous failures of individual units. The Technical Service shall verify that these tests include aspects that may have an impact on vehicle controllability and user information (HMI aspects)." 4.1.2.1. The verification results shall correspond with the documented summary of the failure analysis, to a level of overall effect such that the safety concept and execution are confirmed as being adequate. 5. Reporting by Technical Service Reporting of the assessment by the Technical Service shall be performed in such a manner that allows traceability, e.g. versions of documents inspected are coded and listed in the records of the Technical Service. An example of a possible layout for the assessment form from the Technical Service to the Type Approval Authority is given in Appendix 1 to this Annex. 56/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 Annex 6 - Appendix 1 Model assessment form for electronic systems Test report No: ................................................................................................................ 1. Identification 1.1. Vehicle make: .......................................................................................................... 1.2. Type: ................................................................................................................... 1.3. Means of identification of type if marked on the vehicle: .............................................................. 1.4. Location of that marking: .............................................................................................. 1.5. Manufacturer’s name and address: ..................................................................................... 1.6. If applicable, name and address of manufacturer’s representative: ..................................................... 1.7. Manufacturer’s formal documentation package: Documentation reference No: .......................................................................................... Date of original issue: .................................................................................................. Date of latest update: .................................................................................................. 2. Test vehicle(s)/system(s) description 2.1. General description: .................................................................................................... 2.2. Description of all the control functions of "The System", and methods of operation: .................................. 2.3. Description of the components and diagrams of the interconnections within "The System": .......................... 3. Manufacturer’s safety concept 3.1. Description of signal flow and operating data and their priorities: .................................................... 3.2. Manufacturer’s declaration: The manufacturer(s) .............affirm(s) that the strategy chosen to achieve "The System", objectives will not, under non-fault conditions, prejudice the safe operation of the vehicle. 3.3. Software outline architecture and the design methods and tools used: ................................................ 3.4. Explanation of design provisions built into "The System" under fault conditions: ..................................... 3.5. Documented analyses of the behaviour of "The System" under individual hazard or fault conditions: ................ 3.6. Description of the measures in place for environmental conditions: ................................................... 3.7. Provisions for the periodic technical inspection of "The System": ...................................................... 3.8. Results of "The System" verification test, as per para. 4.1.1. of Annex 6 to UN Regulation No. 79: ELI: http://data.europa.eu/eli/reg/2025/3/oj 57/83EN OJ L, 10.1.2025 3.9. Results of safety concept verification test, as per para. 4.1.2. of Annex 6 to UN Regulation No. 79: .................. 3.10. Date of test: ............................................................................................................ 3.11. This test has been carried out and the results reported in accordance with ….. to UN Regulation No. 79 as last amended by the ..... series of amendments. Technical Service(1)carrying out the test Signed: .....................................................Date: .................................................... 3.12. Comments: ............................................................................................................. (1) To be signed by different persons even when the Technical Service and Type Approval Authority are the same or alternatively, a separate Type Approval Authority authorization is issued with the report. 58/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 ANNEX 7 Special provisions for the powering of trailer steering systems from the towing vehicle 1. General The requirements of this annex shall apply to towing vehicles and trailers where electrical energy is supplied from the towing vehicle to facilitate operation of the steering system installed on the trailer. 2. Requirements for towing vehicles 2.1. Energy Supply 2.1.1. The vehicle manufacturer shall define the capacity of the energy source that will enable the current defined in paragraph 2.3. below to be available for the trailer during normal operation of the vehicle. 2.1.2. The driver's manual shall include information to advise the driver on the electrical energy available for the trailer steering system and that the electrical interface shall not be connected when the current requirement marked on the trailer exceeds that which can be supplied by the towing vehicle. 2.1.3. The power supply provided by the connector referenced in paragraph 2.5. below shall be used for the powering of the trailer steering system. However, in all cases the provisions of paragraph 3.3. below shall apply. 2.2. The nominal operating voltage is 24V. 2.3. The maximum current supply available at the connector referenced in paragraph 2.5.2. below shall be defined by the towing vehicle manufacturer. 2.4. Protection of the electrical system 2.4.1. The electrical system of the towing vehicle shall be protected from an overload or short circuit in the supply to the trailer steering system. 2.5. Wiring and Connectors 2.5.1. The cables used to supply the trailer electrical energy shall have a conductor cross-sectional area compatible with the continuous current defined in paragraph 2.3. above. 2.5.2. Until a uniform standard has been defined the connector used to connect to the trailer shall fulfil the following: (a) The pins shall have a current carrying capacity compatible with the maximum continuous current defined in paragraph 2.3. above; (b) Until uniform standards have been agreed the environmental protection of the connector shall be appropriate to the application and included in the Annex 6 assessment; and (c) The connector shall not be interchangeable with an existing electrical connector currently used on the towing vehicle i.e. ISO 7638, ISO 12098, etc. 2.6. Marking 2.6.1. The towing vehicle shall be marked to indicate the maximum current available for the trailer as defined in paragraph 2.3. above. ELI: http://data.europa.eu/eli/reg/2025/3/oj 59/83EN OJ L, 10.1.2025 The marking shall be indelible and positioned so that it is visible when connecting the electrical interface referenced in paragraph 2.5.2. above. 3. Requirements for trailers 3.1. The maximum current requirement of the trailer steering system shall be defined by the vehicle manufacturer. 3.2. The nominal operating voltage is 24V. 3.3. The electrical energy available from the towing vehicle shall only be used as follows: (a) Exclusively for use by the trailer steering system; or (b) For the trailer steering system and to power auxiliary systems on the trailer provided the steering system has priority and is protected from an overload external to the steering system. This protection shall be a function of the trailer steering system. 3.4. Wiring and Connectors 3.4.1. The cables used to supply the trailer steering system with electrical energy shall have a conductor cross sectional area compatible with the energy requirements of the steering system installed on the trailer. 3.4.2. Until a uniform standard has been defined the connector used to connect to the trailer shall fulfil the following: (a) The pins shall have a current carrying capacity compatible with the maximum current defined by the vehicle manufacturer in paragraph 3.1. above; (b) Until uniform standards have been agreed the environmental protection of the connector shall be appropriate to the application and included in the Annex 6 assessment; (c) The connector shall not be interchangeable with an existing electrical connector currently used on the towing vehicle, i.e. ISO 7638, ISO 12098, etc. 3.5. Failure warning: Failures within the electric control transmission of the steering system shall be directly displayed to the driver. 3.6. Demonstration of the operation of the steering system 3.6.1. At the time of type approval the trailer manufacturer shall demonstrate to the Technical Service the functionality of the steering system by fulfilling the relevant performance requirements specified within the Regulation. 3.6.2. Failure Conditions: 3.6.2.1. Under steady state conditions: In the event of the trailer being coupled to a towing vehicle that does not have an electrical supply for the trailer steering system, or there is a break in the electrical supply to the trailer steering system or there is a failure in the electric control transmission of the trailer steering control system it shall be demonstrated that the trailer fulfils all relevant requirements of paragraph 6.3. of this Regulation for the intact system. 60/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 3.6.2.2. Under transient conditions The transient behaviour of the vehicle in the case of failure within the electric control transmission of the steering system shall be evaluated to ensure vehicle stability is maintained during the transition following the failure and shall be assessed by fulfilling the following: (a) By applying the test procedure and requirements defined within paragraph 6.3.1. of this Regulation.(1) (b) By applying the test procedure and requirements defined within paragraph 6.3.3. of this Regulation.(1) 3.6.3. If the trailer steering system utilises hydraulic transmission to operate the steering, the requirements of Annex 5 shall apply. 3.7. Marking 3.8.1. Trailers equipped with a connector for the supply of electrical energy to the trailer steering system shall be marked to include the following information: (a) The maximum current requirement for the trailer steering system as defined in paragraph 3.1. above. (b) The functionality of the trailer steering system including the impact on manoeuvrability when the connector is connected and disconnected. The marking shall be in indelible form and positioned so that it is visible when connecting to the electrical interface referenced in paragraph 3.3.2. above. (1) The Technical Service may accept the test results supplied by the trailer manufacturer to demonstrate compliance with the transient tests. ELI: http://data.europa.eu/eli/reg/2025/3/oj 61/83EN OJ L, 10.1.2025 ANNEX 8 Test requirements for corrective and automatically commanded steering functions 1. General provisions Vehicles fitted with CSF and/or ACSF systems shall fulfil the appropriate tests requirements of this annex. 2. Testing conditions The tests shall be performed on a flat, dry asphalt or concrete surface affording good adhesion. The ambient temperature shall be between 0 °C and 45 °C. At the request of the manufacturer and with the agreement of the Technical Service tests may be conducted under deviating test conditions (suboptimal conditions, e.g. on a not dry surface; below the specified minimum ambient temperature), whilst the performance requirements are still to be met. 2.1. Lane markings The lane markings on the road used for the tests shall be in line with one of those described in Annex 3 of UN Regulation No. 130, the original version (00 series of amendments). The markings shall be in good condition and of a material conforming to the standard for visible lane markings. The lane-marking layout used for the tests shall be recorded in the test report. The width of the lane shall be minimum 3.5 m, for the purpose of the tests of this annex. At the manufacturer's discretion and with the agreement of the Technical Service, a lane with a width of less than 3.5 m may be used, if the correct function of the system on roads with wider lanes can be demonstrated. The test shall be performed under visibility conditions that allow safe driving at the required test speed. The vehicle manufacturer shall demonstrate, through the use of documentation, compliance with all other lane markings identified in Annex 3 of UN Regulation No. 130, the original version (00 series of amendments). Any of such documentation shall be appended to the test report. 2.2. Tolerances All vehicle speeds specified for the tests described in this annex shall be met within a tolerance of ±2 km/h. 2.3. Vehicle conditions 2.3.1. Test mass The vehicle shall be tested in a load condition agreed between the manufacturer and the Technical Service. No load alteration shall be made once the test procedure has begun. The vehicle manufacturer shall demonstrate, through the use of documentation, that the system works at all load conditions. 2.3.2. The vehicle shall be tested at the tyre pressures recommended by the vehicle manufacturer. 2.4. Lateral acceleration The lateral acceleration and the lateral jerk at vehicle's centre of gravity shall be determined. The raw lateral acceleration data shall be measured closest as possible to the position of the vehicle's centre of gravity. The position at which the lateral acceleration is measured, and the centre of gravity of the vehicle shall be identified in the test report. The sampling rate shall be at least 100 Hz. 62/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 To determine the lateral acceleration, the raw data shall be filtered by applying a fourth order Butterworth filter with a cut-off frequency of 0.5 Hz. To determine the lateral jerk, the 500ms moving average of the time derivation of the filtered lateral acceleration shall be considered. The lateral acceleration data at the vehicle centre of gravity shall be determined by removing additional effects due to the movements of the vehicle body (e.g. roll of sprung mass) and by correcting for sensor placement via the use of coordinate transformation. As reference, the intermediate axis system as described in ISO 8855:2011 shall be used. 2.5. Overriding force The measurement of the overriding force during the test can be performed by two methods: either through the internal driver torque signal or by an external measurement device fitted, which doesn’t induce any deactivation of the system. Prior to performing the overriding force test by the internal driver torque signal, it shall be verified by an external measurement device that there are no relevant differences between the both measured values. Differences shall be less than or equal to 3 N. This requirement is deemed to be fulfilled if the correlation between the values of the internal driver torque signal and the external measurement device was determined and is applied in the overriding force test. 3. Tests procedures 3.1. Tests for CSF The following test applies to CSF functions defined in subparagraph (c) of CSF definition in paragraph 2.3.4.2. of this Regulation. 3.1.1. Warning test for CSF 3.1.1.1. The vehicle shall be driven with an activated CSF on a road with lane markings on each side of the lane. In case of a CSF whose interventions are solely based on the evaluation of the presence and location of lane boundaries, the vehicle shall be driven on a road delimited by the boundaries as declared by the manufacturer (e.g. road edge). The test conditions and the vehicle test speed shall be within the operating range of the system. During the test, the duration of the CSF interventions and of the optical and acoustic or haptic warning signal, as relevant, shall be recorded. In the case of paragraph 5.1.6.1.2.1. of this Regulation, the vehicle shall be driven such that it attempts to leave the lane and causes CSF intervention to be maintained for a period longer than 10s (for M , N ) or 30s (for M , M , N , 1 1 2 3 2 N ). If such a test cannot be practically achieved due to e.g. the limitations of the test facilities, with the consent of 3 the type approval authority this requirement may be fulfilled through the use of documentation. The test requirements are fulfilled if: (a) The acoustic or haptic warning, as relevant, is provided no later than 10s (for M , N ) or 30s (for M , M , N , 1 1 2 3 2 N ) after the beginning of the intervention. 3 In the case of paragraph 5.1.6.1.2.2. of this Regulation, the vehicle shall be driven such that it attempts to leave the lane and causes at least three interventions of the system within a rolling interval of 180 s. ELI: http://data.europa.eu/eli/reg/2025/3/oj 63/83EN OJ L, 10.1.2025 The test requirements are fulfilled if: (a) An optical warning signal is provided for each intervention, as long as the intervention exists, and (b) An acoustic or haptic warning signal, as relevant, is provided at the second and third intervention, and (c) The acoustic or haptic warning signal, as relevant, at the third intervention is at least 10 s longer than the one at the second intervention. 3.1.1.2. In addition, the manufacturer shall demonstrate to the satisfaction of the Technical Service that the requirements defined in paragraphs 5.1.6.1.1. and 5.1.6.1.2. are fulfilled in the whole range of CSF operation. This may be achieved on the basis of appropriate documentation appended to the test report. 3.1.2 Overriding force test 3.1.2.1. The vehicle shall be driven with an activated CSF on a road with lane markings on each side of the lane. The test conditions and the vehicle test speed shall be within the operating range of the system. The vehicle shall be driven such that it attempts to leave the lane and causes CSF intervention. During the intervention, the driver shall apply a force on the steering control to override the intervention. The force applied by the driver on the steering control to override the intervention shall be recorded. 3.1.2.2. The test requirements are fulfilled if the force applied by the driver on the steering control to override the intervention does not exceed 50 N. 3.1.2.3 In addition, the manufacturer shall demonstrate to the satisfaction of the Technical Service that the requirements defined in paragraph 5.1.6.1.3. are fulfilled in the whole range of CSF operation. This may be achieved on the basis of appropriate documentation appended to the test report. 3.2. Tests for ACSF Category B1 Systems 3.2.1. Lane keeping functional test 3.2.1.1. The vehicle speed shall remain in the range from V up to V . smin smax The test shall be carried out for each speed range specified in paragraph 5.6.2.1.3. of this Regulation separately or within contiguous speed ranges where the ay is identical. smax The vehicle shall be driven without any force applied by the driver on the steering control (e.g. by removing the hands from the steering control) with a constant speed or with a predefined initial speed when using an embedded vehicle speed control system (e.g. for vehicles automatically decelerating in curves) on a curved track with lane markings at each side. The necessary lateral acceleration to follow the curve shall be between 80 and 90 per cent of the maximum lateral acceleration specified by the vehicle manufacturer ay . The measured lateral acceleration during the test smax execution can be outside of the above-mentioned limits. The lateral acceleration and the lateral jerk shall be recorded during the test. 64/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 3.2.1.2. The test requirements are fulfilled if: No outside edge of the tyre tread of the vehicle’s front wheel does cross the outside edge of any lane marking; The moving average over half a second of the lateral jerk does not exceed 5 m/s3. 3.2.1.3. The vehicle manufacturer shall demonstrate to the satisfaction of the Technical Service that the requirements for the whole lateral acceleration and speed range are fulfilled. This may be achieved on the basis of appropriate documentation appended to the test report. 3.2.2. Maximum lateral acceleration test 3.2.2.1. The vehicle speed shall remain in the range from V up to V . smin smax The test shall be carried out for each speed range specified in paragraph 5.6.2.1.3. of this Regulation separately or within contiguous speed ranges where the ay is identical. smax The vehicle shall be driven without any force applied by the driver on the steering control (e.g. by removing the hands from the steering control) with a constant speed on a curved track with lane markings at each side. If an embedded vehicle speed control system will automatically decelerate the vehicle in the curve, it shall be inhibited. The Technical Service defines a test speed and a radius which would provoke a higher acceleration than ay + smax 0.3 m/s2 (e.g. by travelling with a higher speed through a curve with a given radius). The lateral acceleration and the lateral jerk shall be recorded during the test. 3.2.2.2. The test requirements are fulfilled if: The recorded acceleration is within the limits specified in paragraph 5.6.2.1.1. of this Regulation. The moving average over half a second of the lateral jerk does not exceed 5 m/s3. 3.2.3. Overriding force test 3.2.3.1. The vehicle speed shall remain in the range from V up to V . smin smax The vehicle shall be driven without any force applied by the driver on the steering control (e.g. by removing the hands from the steering control) with a constant speed on a curved track with lane markings at each side. The necessary lateral acceleration to follow the curve shall be between 80 and 90 per cent of the maximum lateral acceleration specified by the vehicle manufacturer ay . smax The driver shall then apply a force on the steering control to override the system intervention and leave the lane. The force applied by the driver on the steering control during the overriding manoeuvre shall be recorded. 3.2.3.2. The test requirements are fulfilled if the force applied by the driver on the steering control during the overriding manoeuvre is less than 50N. The manufacturer shall demonstrate through appropriate documentation that this condition is fulfilled throughout the ACSF operation range. 3.2.4. Transition test; hands-on test 3.2.4.1. The vehicle shall be driven with activated ACSF with a vehicle test speed between V + 10 km/h and V + 20 smin smin km/h on a track with lane markings at each side of the lane. ELI: http://data.europa.eu/eli/reg/2025/3/oj 65/83EN OJ L, 10.1.2025 The driver shall release the steering control and continue to drive until the ACSF is deactivated by the system. The track shall be selected such that it allows driving with activated ACSF for at least 65 s without any driver intervention. The test shall be repeated with a vehicle test speed between V - 20 km/h and V - 10 km/h or 130 km/h smax smax whichever is lower and may be stopped upon the start of the optical warning. Additionally, the vehicle manufacturer shall demonstrate to the satisfaction of the Technical Service that the requirements for the whole speed range are fulfilled. This may be achieved on the basis of appropriate documentation appended to the test report. 3.2.4.2. The test requirements are fulfilled if: During both tests, the optical warning signal was given at the latest 15 s after the steering control has been released and remains until ACSF is deactivated. During the lower speed test the acoustic warning signal was given at the latest 30 s after the steering control has been released and remains until ACSF is deactivated. During the lower speed test the ACSF is deactivated at the latest 30 s after the acoustic warning signal has started, with an acoustic emergency signal of at least 5 s, which is different from the previous acoustic warning signal. 3.2.5. Lane Crossing Warning Test for M N and for M M N and N if not equipped with a Lane Departure Warning 1 1 2 3 2 3, System (LDWS) fulfilling the technical requirements of UN Regulation No. 130. 3.2.5.1. The vehicle shall be driven with activated ACSF with a vehicle test speed between V and V . smin smax The vehicle shall be driven without any force applied by the driver on the steering control (e.g. by removing the hands from the steering control) on a curved track with lane markings at each side. The technical service defines a test speed and a radius which would provoke a lane crossing. The test speed and radius shall be defined such that the necessary lateral acceleration to follow the curve is in between ay + 0.1 smax m/s2 and ay + 0.4 m/s2. smax 3.2.5.2. The test requirements are fulfilled if: The optical warning signal and additionally the acoustic or haptic warning signal was given at the latest when the outside edge of the tyre tread of the vehicle’s front wheel has crossed the outside edge of the lane marking. The system continues to provide assistance as required in paragraph 5.6.2.2.3. 3.3. Tests for ESF The vehicle shall be driven with an activated ESF on a road with lane markings on each side and positioned within those lane markings. The test conditions and the vehicle speeds shall be within the operating range of the system as declared by the manufacturer. Specific details of the mandatory tests described below shall be discussed and agreed between the vehicle manufacturer and the Technical Service to adapt the required testing to the declared use case(s) for which the ESF is designed to operate. In addition, the manufacturer shall demonstrate to the satisfaction of the Technical Service that the requirements defined in paragraph 5.1.6.2.1. to 5.1.6.2.6. are fulfilled in the whole range of the ESF operation (specified by the vehicle manufacturer in the system information data) This may be achieved on the basis of appropriate documentation appended to the test report. 66/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 3.3.1. Test for ESF Type a i/ii: (unintentional lateral manoeuvre) A target vehicle driving in the adjacent lane shall approach the vehicle under test and one of the vehicles shall minimize their lateral separation distance until an ESF intervention is started. The tests requirements are fulfilled if: (a) The warnings specified in paragraph 5.1.6.2.6. of this Regulation are provided no later than the ESF intervention starts, and (b) The ESF intervention does not lead the vehicle to leave its original lane. 3.3.2. Test for ESF Type a iii: (intentional lateral manoeuvre) The vehicle under test starts a lane change while another vehicle is driving in the adjacent lane such that no intervention of the ESF system would lead to a collision. The test requirements are fulfilled if: (a) An ESF intervention is started, and (b) The warnings specified in paragraph 5.1.6.2.6. of this Regulation are provided no later than the ESF intervention starts, and (c) The ESF intervention does not lead the vehicle to leave its original lane. 3.3.3. Test for ESF Type b: The vehicle under test shall approach an object positioned within its trajectory. The object shall be of such size and positioned in a way that the vehicle can pass the object without crossing the lane markings. The tests requirements are fulfilled if: (a) The ESF intervention avoids or mitigates the collision, and (b) The warnings specified in paragraph 5.1.6.2.6. of this Regulation are provided no later than the ESF intervention starts, and (c) The ESF intervention does not lead the vehicle to leave its lane. 3.3.4. Tests for systems able to operate in the absence of lane markings. In case any system works in absence of lane markings the corresponding tests from paragraphs 3.3.1. to 3.3.3. need to be repeated on a test track without lane markings. These test requirements are fulfilled if, (a) An ESF intervention is started; and (b) The warnings specified in paragraph 5.1.6.2.6. of this UN Regulation are provided no later than the ESF intervention starts; and (c) The lateral offset during the manoeuvre is 0.75 m, as specified in paragraph 5.1.6.2.3.2., at maximum or if exceeded in case of an intervention below 20 km/h, the lateral offset rate does not exceed 2 m/s; and (d) The vehicle has not left the road due to the ESF intervention, if applicable for the specified use case. 3.3.5. False reaction test for ESF Type b The vehicle under test shall approach a plastic sheet having a colour contrast to the road surface, a thickness less than 3 mm, a width of 0.8 m and a length of 2 m positioned between the lane markings in the trajectory of the vehicle. The plastic sheet shall be positioned in a way that the vehicle could pass the sheet without crossing the lane markings. The test requirements are fulfilled, if the ESF does not start any intervention. 3.4. (Reserved for ACSF of Category B2) ELI: http://data.europa.eu/eli/reg/2025/3/oj 67/83EN OJ L, 10.1.2025 3.5. Tests for ACSF of Category C If not specified otherwise, all vehicle test speeds shall be based on V = 130 km/h. app If not specified otherwise, the approaching vehicle shall be a type-approved high volume series production vehicle. A “vehicle under test” or “a test vehicle” normally driven as single vehicle/unit may be a part of a combination. In case the power-driven vehicle supports lane changes according to paragraph 5.6.4.8.1.1. (system in solo condition), the power-driven vehicle shall be tested according to paragraphs 3.5.1. to 3.5.7. of this annex. In case the power-driven vehicle supports lane changes when coupled to a trailer supporting lane change function (“yes” in paragraph 7.3.2. in Annex 1), the power-driven vehicle shall be tested with a trailer supporting lane change function (“yes” in paragraph 8.4 in Annex 1) coupled during the test according to paragraphs 3.5.1. to 3.5.8.1. of this annex. In case the power-driven vehicle supports lane changes when coupled to a trailer without support of the trailer (“yes” in paragraph 7.3.3. in Annex 1), the power-driven vehicle shall be tested with a trailer not supporting lane change function (“no” in paragraph 8.4 in Annex 1) coupled during the test according to paragraphs 3.5.1. to 3.5.8.2. of this annex. A trailer supporting lane change function (“yes” in paragraph 8.4. in Annex 1) shall fulfil the test of paragraphs 3.5.6. and 3.5.9. The tests according to paragraphs 3.5.1. to 3.5.5. and 3.5.7. are dedicated to the power-driven vehicle. The vehicle manufacturer shall demonstrate to the satisfaction of the Technical Service that the requirements are fulfilled for the whole speed range. This may be achieved on the basis of appropriate documentation appended to the test report. 3.5.1. Lane change functional test 3.5.1.1. The test vehicle shall be driven in a lane of a straight test track, which has at least two lanes in the same direction of travel, with road markings on each side of the lanes. The vehicle speed shall be: V + 10km/h. smin The ACSF of Category C shall be activated (standby mode) and, unless the system is already enabled according to paragraph 5.6.4.8.3., another vehicle shall approach from the rear in order to enable the system as specified in paragraph 5.6.4.8.3. above. The approaching vehicle shall then pass the vehicle under test entirely. A lane change procedure shall then be initiated by the driver. The lateral acceleration and the lateral jerk shall be recorded during the test. 3.5.1.2. The requirements of the test are fulfilled if: (a) The lateral movement towards the marking does not start earlier than 1 second after the lane change procedure was initiated, (b) The lateral movement to approach the lane marking and the lateral movement necessary to complete the lane change manoeuvre are completed as one continuous movement, (c) The recorded lateral acceleration does not exceed 1m/s2, (d) The moving average over half a second of the lateral jerk does not exceed 5 m/s3, (e) The measured time between the start of the lane change procedure and the start of the lane change manoeuvre is not less than 3.0 s and not more than: (i) 5.0 seconds in the case of an automatic initiation, (ii) 7.0 seconds in the case of an initiation by a second deliberate action whatever is appropriate. 68/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 (f) For systems with an initiation of the lane change manoeuvre by a second deliberate action, (i) The measured time between the start of the lane change procedure and the second deliberate action is not more than 5.0 seconds, and (ii) The measured time between the second deliberate action and the start of the lane change manoeuvre is not more than 3.0 seconds. (g) The system provides an information to the driver to indicate that the lane change procedure is on-going, (h) The lane change manoeuvre is completed in less than 5 s for M , N vehicle categories and less than 10 s for 1 1 M , M , N , N vehicle categories, 2 3 2 3 (i) ACSF of Category B1 automatically resumes after the lane change procedure is completed, and (j) The direction indicator is deactivated not before the end of the lane change manoeuvre and no later than 0.5 seconds after ACSF of Category B1 has resumed, in case the lateral movement is initiated automatically and the direction indicator control was not fully engaged (latched position) during the lane change manoeuvre. 3.5.1.3. The test according to paragraph 3.5.1.1. shall be repeated with a lane change in the opposite direction. 3.5.2. Minimum activation speed test V smin. 3.5.2.1. Minimum activation speed test V based on V = 130 km/h. smin app The test vehicle shall be driven within a lane of a straight track which has at least two lanes in the same direction of travel and road markings on each side of the lane. The vehicle speed shall be: V - 10km/h. smin The ACSF of Category C shall be activated (standby mode) and, unless the system is already enabled according to paragraph 5.6.4.8.3., another vehicle shall approach from the rear in order to enable the system as specified in paragraph 5.6.4.8.3. above. The approaching vehicle shall then pass the vehicle under test entirely. A lane change procedure shall then be initiated by the driver. The requirements of the test are fulfilled if the lane change manoeuvre is not performed. 3.5.2.2. Minimum activation speed test V based on country specific general maximum speed limit below 130 km/h. smin In case V is calculated, based on a country specific general maximum speed limit instead of V =130 km/h as smin app specified in paragraph 5.6.4.8.1., the tests described below shall be performed. For this purpose it is allowed to simulate the country of operation in agreement between the vehicle manufacturer and the Technical Service. 3.5.2.2.1. The test vehicle shall be driven within a lane of a straight track which has at least two lanes in the same direction of travel and road markings on each side of the lane. The vehicle speed shall be: V - 10km/h. smin The ACSF of Category C shall be activated (standby mode) and, unless the system is already enabled according to paragraph 5.6.4.8.3., another vehicle shall approach from the rear in order to enable the system as specified in paragraph 5.6.4.8.3. above. The approaching vehicle shall then pass the vehicle under test entirely. A lane change procedure shall then be initiated by the driver. ELI: http://data.europa.eu/eli/reg/2025/3/oj 69/83EN OJ L, 10.1.2025 The requirements of the test are fulfilled if the lane change manoeuvre is not performed. 3.5.2.2.2. The test vehicle shall be driven within a lane of a straight track which has at least two lanes in the same direction of travel and road markings oneach side of the lane. The vehicle speed shall be: V + 10km/h. smin The ACSF of Category C shall be activated (standby mode) and, unless the system is already enabled according to paragraph 5.6.4.8.3., another vehicle shall approach from the rear in order to enable the system as specified in paragraph 5.6.4.8.3. above. The approaching vehicle shall then pass the vehicle under test entirely. A lane change procedure shall then be initiated by the driver. The requirements of the test are fulfilled if the lane change manoeuvre is performed. 3.5.2.2.3. The manufacturer shall demonstrate to the satisfaction of the Technical Service that the vehicle is able to detect the country of operation and that the general maximum speed limit of this country is known. 3.5.3. Overriding test 3.5.3.1. The test vehicle shall be driven in a lane of a straight test track, which has at least two lanes in the same direction of travel, with road markings on each side of the lanes. The vehicle speed shall be: V + 10km/h. smin The ACSF of Category C shall be activated (standby mode) and, unless the system is already enabled according to paragraph 5.6.4.8.3., another vehicle shall approach from the rear in order to enable the system as specified in paragraph 5.6.4.8.3. above. The approaching vehicle shall then pass the vehicle under test entirely. A lane change into the adjacent lane shall then be initiated by the driver. The steering control shall be firmly controlled by the driver to maintain the vehicle in the straight direction. The force applied by the driver on the steering control during the overriding manoeuver shall be recorded. 3.5.3.2. The test requirements are fulfilled if the measured overriding force does not exceed 50 N, as specified in paragraph 5.6.4.3. above. 3.5.3.3. The test according to paragraph 3.5.3.1. shall be repeated with a lane change in the opposite direction. 3.5.4. Lane Change Procedure suppression test 3.5.4.1. The test vehicle shall be driven in a lane of a straight test track, which has at least two lanes in the same direction of travel, with road markings on each side of the lanes. The vehicle speed shall be: V + 10km/h. smin The ACSF of Category C shall be activated (standby mode) and, unless the system is already enabled according to paragraph 5.6.4.8.3., another vehicle shall approach from the rear in order to enable the system as specified in paragraph 5.6.4.8.3. above. The approaching vehicle shall then pass the vehicle under test entirely. A Lane Change Procedure shall then be initiated by the driver. 70/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 The test shall be repeated for each of the following conditions, which shall occur before the lane change manoeuvre has started: (a) The system is overridden by the driver; (b) The system is switched off by the driver; (c) The vehicle speed is reduced to: V -10 km/h; smin (d) The driver has removed his hands from the steering control and the hands-off warning has been initiated; (e) The direction indicator lamps are manually deactivated by the driver; (f) The lane change manoeuvre has not commenced within 5.0 seconds following the initiation of the lane change procedure. (e.g. another vehicle is driving in the adjacent lane in a critical situation as described in paragraph 5.6.4.7.) or 7.0 seconds if initiated by a second deliberate action. (g) The second deliberate action for an appropriate system is performed later than 5.0 seconds after the initiation of the lane change procedure. 3.5.4.2. The requirements of the test are fulfilled if the lane change procedure is suppressed, for each of the test cases above. 3.5.5. Sensor performance test 3.5.5.1. The test vehicle shall be driven in a lane of a straight test track, which has at least two lanes in the same direction of travel, with road markings on each side of the lanes. The vehicle speed shall be: V + 10km/h. smin The ACSF of Category C shall be activated (standby mode). Another vehicle shall approach from the rear on the adjacent lane, with a speed of 120 km/h. The approaching vehicle shall be a type approved high volume series production motorcycle of category L 1 with 3 an engine capacity not exceeding 600 cm3 without front fairing or windshield and shall aim to drive in the middle of the lane. The distance between the rear end of the test vehicle and the front end of the approaching vehicle shall be measured (e.g. with a Differential Global Positioning System), and the value when the system detects the approaching vehicle shall be recorded. 3.5.5.2. The requirements of the test are fulfilled if the system detects the approaching vehicle no later than at the distance declared by the vehicle manufacturer (S ), as specified in 5.6.4.8.1. above. rear 3.5.6. Sensor blindness test 3.5.6.1. The test vehicle shall be driven in a lane of a straight test track, which has at least two lanes in the same direction of travel, with road markings on each side of the lanes. The vehicle speed shall be: V + 10km/h. smin The ACSF of Category C shall be activated (standby mode) and, unless the system is already enabled according to paragraph 5.6.4.8.3., another vehicle shall approach from the rear in order to enable the system as specified in paragraph 5.6.4.8.3. above. The approaching vehicle shall then pass the vehicle under test entirely. The rear sensor(s) shall be made blind, with means agreed between the vehicle manufacturer and the Technical Service, which shall be recorded in the test report. This operation may be carried out at standstill, provided no new engine start /run cycle is performed. The vehicle shall be driven to a speed of V + 10km/h, and a lane change procedure shall be initiated by the smin driver. ELI: http://data.europa.eu/eli/reg/2025/3/oj 71/83EN OJ L, 10.1.2025 3.5.6.2. The requirements of the test are fulfilled if the system: (a) Detects the sensor blindness, (b) Provides a warning to the driver as defined in para. 5.6.4.8.4., and (c) Is prevented from performing the lane change manoeuvre. In addition to the above mentioned test, the manufacturer shall demonstrate to the satisfaction of the Technical Service that the requirements defined in paragraph 5.6.4.8.4. are also fulfilled under different driving scenarios. This may be achieved on the basis of appropriate documentation appended to the test report. 3.5.7. Engine start/run cycle test The test is divided in 3 consecutive phases as specified below. The vehicle speed shall be: V + 10km/h. smin 3.5.7.1. Phase 1 – Default-off test 3.5.7.1.1. Following a new engine start /run cycle performed by the driver, the test vehicle shall be driven in a lane of a straight test track, which has at least two lanes in the same direction of travel, with road markings on each side of the lanes. The ACSF of Category C shall not be activated (off mode) and another vehicle shall approach from the rear and the approaching vehicle shall pass the vehicle entirely. A lane change procedure shall then be initiated by the driver with the appropriate deliberate action(s). 3.5.7.1.2. The requirements of the test phase 1 are fulfilled if the lane change manoeuvre is not initiated. 3.5.7.2. Phase 2 The objective of the test is to check that the lane change manoeuvre is prevented if the system has not detected any moving object at a distance equal or greater than the distance Srear (as specified in paragraph 5.6.4.8.3.). 3.5.7.2.1. Following a new engine start / run cycle performed by the driver, the test vehicle shall be driven in a lane of a straight test track, which has at least two lanes in the same direction of travel, with road markings on each side of the lanes. The ACSF of Category C shall be manually activated (standby mode). A lane change procedure and manoeuvre shall then be initiated by the driver with the appropriate deliberate action(s). 3.5.7.2.2. The requirements of the test phase 2 are fulfilled if the lane change manoeuvre has not started (as the pre- condition specified in 5.6.4.8.3. is not fulfilled). 3.5.7.3. Phase 3 – Lane change enabling conditions test The objective of the test is to check that the lane change manoeuvre is only possible once the system has detected a moving object at a distance equal or greater than the distance S (as specified in paragraph 5.6.4.8.3.). rear 3.5.7.3.1. Following the completion of the test phase 2, another vehicle shall approach from the rear on the adjacent lane in order to enable the system as specified in paragraph 5.6.4.8.3. The approaching vehicle shall be a type approved high volume series production vehicle. 72/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 The distance between the rear end of the test vehicle and the front end of the approaching vehicle shall be measured (e.g. with a differential GPS), and the value when the system detects the approaching vehicle be recorded. After the rear coming vehicle has entirely passed the vehicle under test, a lane change procedure and manoeuvre shall be initiated by the driver with the appropriate deliberate action(s). 3.5.7.3.2. The requirements of the test phase 3 are fulfilled if: (a) The lane change manoeuver is executed; (b) The approaching vehicle is detected no later than at the distance declared by the vehicle manufacturer (S ). rear 3.5.8. Lane change suppression test The test vehicle shall be driven in a lane of a straight test track, which has at least two lanes in the same direction of travel, with road markings on each side of the lanes. The vehicle speed shall be: Vsmin + 10km/h. The ACSF of Category C shall be activated (standby mode). A Lane Change Procedure shall then be initiated by the driver. The requirements of the test are fulfilled if the system inhibits any lane change procedures if: 3.5.8.1. In case the power-driven vehicle supports lane changes according to paragraph 7.3.2. when coupled to a trailer supporting lane change function(s) according to paragraph 8.4. (a) The trailer is not supporting lane change function(s) according to paragraph 5.6.4.8.1.1. and paragraph 5.6.4.9.2.; or (b) The power-driven vehicle is not able to perform detection of areas specified in paragraph 5.6.4.8.1.1. or specified in paragraph 5.6.4.8.1.2.; or (c) A warning to the driver specified in paragraph 5.6.4.5.4. is provided. Provisions of ISO11992-3:2021 shall be respected. The manufacturer shall demonstrate to the satisfaction of the Technical Service dimensions of areas on ground level those permit lane change procedures executed singularly or in combination with at least one trailer. 3.5.8.2. In case the power-driven vehicle supports lane changes according to paragraph 7.3.3. when coupled to a trailer not supporting lane change function(s) according to paragraph 8.4. (a) The power-driven vehicle is not able to perform detection of areas specified in paragraph 5.6.4.8.1.3. 3.5.9. Object detection test for trailers supporting lane change function(s) according to paragraph 8.4. 3.5.9.1. Detection of targets on low speed above 10 km/h The test vehicle shall be stationary within a lane of a straight track which has at least two lanes and road markings on each side of the lane. Low speed moving objects with a RCS not greater than a type approved high volume series production motorcycle of Category L with an engine capacity not exceeding 600 cm3 without front fairing or windshield 3 shall approach as follows: (a) At the leading edge left and right at a distance of 0.5...4 m from vehicle under test; ELI: http://data.europa.eu/eli/reg/2025/3/oj 73/83EN OJ L, 10.1.2025 (b) At the rear edge left and right at a distance of 0.5...4 m from vehicle under test; (c) At the rear at a distance of 5 m and 55 m in the adjacent lane. The requirements of the test are fulfilled if the trailer system or the towing vehicle system detects the approaching vehicles in all 6 positions in sequence. 3.5.9.2. Detection of moving targets in adjacent lanes The test vehicle shall be stationary within a lane of a straight track which has at least two lanes and road markings on each side of the lane. Another vehicle shall approach from the rear on the nearest adjacent lane, with a speed of 120 km/h. The approaching vehicle shall be a type approved high volume series production motorcycle of Category L with 3 an engine capacity not exceeding 600 cm3 without front fairing or windshield and shall aim to drive in the middle of the lane. The distance between the rear end of the test vehicle and the front end of the approaching vehicle shall be measured (e.g. with a Differential Global Positioning System), and the value when the system detects the approaching vehicle shall be recorded. The test shall be repeated with the approaching vehicle in the opposite adjacent lane. The requirements of the test are fulfilled if the system detects the approaching vehicle no later than 55 m from the rear edge of the vehicle. 3.6 Tests for RMF The vehicle shall be driven with an activated RMF on a road with all relevant lane markings in a good visible shape. The test conditions and the vehicle speeds shall be within the operating range of the system as declared by the manufacturer. Specific details of the mandatory tests described below shall be discussed and agreed between the vehicle manufacturer and the Technical Service to adapt the required testing to the declared use case(s) for which the RMF is designed to operate. In addition, the manufacturer shall demonstrate to the satisfaction of the Technical Service that the requirements defined in paragraph 5.1.6.3. are fulfilled in the whole operating range of the RMF (specified by the vehicle manufacturer in the system information data). This may be achieved on the basis of appropriate documentation appended to the test report. 3.6.1. Tests for an RMF, with the purpose of bringing the vehicle to a safe stop inside its own lane of travel: The vehicle shall be driven in a way that an intervention is initiated. The test requirements are fulfilled if: (a) The ongoing intervention is indicated to the driver by an optical warning signal and additionally an acoustic and/or haptic warning signal as defined in paragraph 5.1.6.3.2. (b) The signal to activate the hazard warning lights is generated with the start of the intervention. (c) The deceleration demand does not exceed 4m/s2 as described in paragraph 5.1.6.3.6. (d) Once RMF has brought the vehicle to a safe stop, the vehicle does not move away without manual input. 74/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 3.6.2. Tests for an RMF, with the purpose of bringing the vehicle to a safe stop outside its own lane of travel: 3.6.2.1. Scenario A: A Lane Change Manoeuvre is possible according to the provisions of paragraph 5.1.6.3.9.8.2. The vehicle shall be driven in a way that an RMF intervention is initiated while a target stop area outside the current lane of travel is available. In case there is another vehicle in the target lane this shall be positioned in a way not preventing a lane change of the RMF vehicle to the target lane. The test requirements are fulfilled if: (a) The ongoing intervention is indicated to the driver by at least an optical and acoustic and/or haptic warning signal as defined in paragraph 5.1.6.3.2. (b) The signal to activate the hazard warning lights is generated with the start of the intervention. (c) The lane change manoeuvre is indicated in advance to other road users. (d) The RMF vehicle changes the lane(s) following the provisions of paragraph 5.1.6.3.9.8. and its subparagraphs. 3.6.2.2. Scenario B: A Lane Change Manoeuvre is not possible according to the provisions of paragraph 5.1.6.3.9.8.2. The vehicle shall be driven in a way that an RMF intervention is initiated while a target stop area outside the current lane of travel is available. At the start of the RMF intervention there shall be another vehicle in the target lane positioned in a way preventing a lane change manoeuvre of the RMF vehicle to the target lane. The test requirements are fulfilled if: (a) The ongoing intervention is indicated to the driver by at least an optical and acoustic and/or haptic warning signal as defined in paragraph 5.1.6.3.2. (b) The signal to activate the hazard warning lights is generated with the start of the intervention. (c) The lane change manoeuvre is indicated in advance to other road users. (d) The RMF vehicle does not start a lane change manoeuvre as long as the vehicle in the target lane is still positioned in a way preventing a lane change manoeuvre. ELI: http://data.europa.eu/eli/reg/2025/3/oj 75/83EN OJ L, 10.1.2025 ANNEX 9 Compatibility between towing vehicles and trailers with regard to data transmission according to ISO 11992 for environmental monitoring 1. General 1.1. The requirements of this annex shall only apply to towing vehicles and trailers equipped with an electric control line as defined in paragraph 2.7 of the regulation. 1.2. The ISO 12098:2004 connector provides a power supply for the ASCF/environmental monitoring function of the trailer via pins 4 and 9. In the case of vehicles equipped with an electric control line as defined in paragraph 2.7 of the Regulation this connector also provides a data communication interface via pins 13, 14 and 15 — see paragraph 5.6.4.9.1. of the Regulation. 1.3. This annex defines requirements applicable to the towing vehicle and trailer with respect to the support of ASCF/ environmental monitoring messages defined within ISO 11992-3:2021. 2. The parameters defined within iso 11992-3:2021 that are transmitted by the electric control line shall be supported as follows: 2.1. The following functions and associated messages are those specified within this Regulation that shall be supported by the towing vehicle or trailer as appropriate: 2.1.1. Messages transmitted from the towing vehicle to the trailer: GPM11 message definition Byte pos. Bit pos. Parameter ISO 11992-03:2021 Regulation No. 79 Reference 1 1 to 2 Vehicle type Regulation No. 79, Paragraph 5.6.4.9.1.4. 3 to 8 Detailed Vehicle Type Regulation No. 79, Paragraph 5.6.4.9.1.4. 2 5 to 8 ODM version request Regulation No. 79, Paragraph 5.6.4.9.1.4. Object Detection Message (ODM 11) With this message, relevant information for the automated steering function is sent from the towing vehicle to the towed vehicle. ODM 11 message definition Byte pos. Bit pos. Parameter ISO 11992-03:2021 1 — CRC 2 1 to 4 sequence counter 5 to 8 ODM input 3 to 4 — longitudinal speed 5 to 6 — lateral speed 76/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 Byte pos. Bit pos. Parameter ISO 11992-03:2021 7 to 8 — yaw rate 2.1.2. Messages transmitted from the trailer to the towing vehicle: GPM21 message definition Byte pos. Bit pos. Parameter ISO 11992-03:2021 Regulation No. 79 Reference 1 1 to 2 Vehicle Type Regulation No. 79, Paragraph 5.6.4.9.2.1. 3 to 8 Detailed Vehicle Type Regulation No. 79, Paragraph 5.6.4.9.2.1. 2 5 to 8 ODM Version Information Regulation No. 79, Paragraph 5.6.4.9.2.1. 7 1 to 8 Identification Data Index Regulation No. 79, Paragraph 5.6.4.9.2.1. 8 1 to 8 Identification Data Content Regulation No. 79, Paragraph 5.6.4.9.2.1. ODM 21, ODM 23, ODM 25, ODM 27, ODM 29, ODM 211, ODM 213, ODM 215 message definition Byte pos. Bit pos. Parameter ISO 11992-03:2021 1 — Cyclic Redundancy Check (CRC-8) 2 1 to 4 Sequence Counter 2 5 to 8 Status Indicator 3 to 4 — Automated Steering Longitudinal Distance Object 5 to 6 — Automated Steering Lateral Distance Object 7 1 to 4 Automated Steering Standard Deviation of Longitudinal and Lateral Distance 7 5 to 8 reserved by this document 8 1 to 8 Track ID ODM 22, ODM 24, ODM 26, ODM 28, ODM210, ODM 212, ODM 214, ODM 216 message definition Byte pos. Bit pos. Parameter ISO 11992-03:2021 1 — Cyclic Redundancy Check (CRC-8) 2 1 to 4 Sequence Counter 2 5 to 8 Status Indicator ELI: http://data.europa.eu/eli/reg/2025/3/oj 77/83EN OJ L, 10.1.2025 Byte pos. Bit pos. Parameter ISO 11992-03:2021 3 to 4 — Automated Steering Absolute Longitudinal Speed Object 5 to 6 — Automated Steering Absolute Lateral Speed Object 7 1 to 4 Automated Steering Normal Deviation of Longitudinal and Lateral Speed 7 5 to 7 reserved by this document 2.1.2.1. General IMPORTANT — If ISO 11992-1 is used as a data link and physical layer only one trailer (towed vehicle) can be supported due to bandwidth overload of the CAN bus between towing and towed vehicles. The towing vehicle shall not rely on any sorting of the objects communicated by the towed vehicle. 2.1.2.2. Objects to the side of the towed vehicle The following rule shall be applied for left-hand and right-hand side separately: If there are several objects next to the towed vehicle, the one with minimum lateral distance to the towed vehicle shall be selected. 2.1.2.3. Objects behind the towed vehicle The area behind the towed vehicle is split into five ranges. From each range an object shall be selected, if present. If the absolute velocity of the towed vehicle > 10 km/h only moving objects shall be selected. An object is moving if its absolute velocity is not zero. The five ranges are specified by the lateral position relatively to the towed vehicle: (a) – 0,5× w – 7 m ≤ y < – 0,5× w – 3,5 m (b) – 0,5× w – 3,5 m ≤ y < – 0,5 × w (c) behind the towed vehicle (d) 0,5 × w < y ≤ 0,5 × w + 3,5 m (e) 0,5 × w + 3,5 m < y ≤ 0,5 × w + 7 m 78/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 Where y is the lateral position [m] and w is the width [m] of the towed vehicle. No objects are detected, sensor system not ready: In case no objects are detected or the sensor system is not ready all object values shall be set to SNA (system not available). 2.2. Under the following conditions the towed vehicle shall transmit the status indicator according to the ODM messages defined in paragraph 2.1.2. above: 2.2.1. Communication error: If a communication persistent error is reported by an underlying layer (e.g. bus-off by the CAN controller), the application shall perform a reset. After the reset, the same initialisation procedure as on power-up shall be performed. The delay between the persistent error is reported and the reset executed shall be at least 100 ms. 2.2.2. Sensor error: The sensors providing ODM information shall be equipped with mechanisms for sensor failure detection (e.g. blockage, malfunction). A detected sensor error shall be reported by the ODM status indicator. If the sensors are equipped with integrated recovery mechanism, these should be supported. 2.3. The following messages defined in ISO 11992-3:2021 shall be supported by the towing vehicle or trailer if available: 2.3.1. Messages transmitted from the trailer to the towing vehicle: ODM 217 message definition Byte pos. Bit pos. Parameter ISO 11992-03:2021 1 — Cyclic Redundancy Check (CRC-8) 2 1 to 4 Sequence Counter 2 5 to 8 Status Indicator 3 to 4 — Geometric Item #1 5 to 6 — Geometric Item #2 7 to 8 — Geometric Item #3 ELI: http://data.europa.eu/eli/reg/2025/3/oj 79/83EN OJ L, 10.1.2025 Multiplexing rules for geometric distances Sequence counter Item Parameter ISO 11992-03:2021 1 or 9 #1 distance to rear coupling point 1 or 9 #2 distance to centre of rotation 2.4. The following messages shall be supported by the towing vehicle or trailer as appropriate when the vehicle is installed with a function associated with that parameter: 2.4.1. Messages transmitted from the towing vehicle to the trailer: GPM11 message definition Byte pos. Bit pos. Parameter ISO 11992-03:2021 3 to 4 1 to 16 Articulation Angle between towing and towed vehicle 5 to 6 1 to 16 Angle between towing vehicle and drawbar 7 to 8 1 to 16 Angle between drawbar and towed vehicle 2.4.2. Messages transmitted from the trailer to the towing vehicle: GPM21 message definition Byte pos. Bit pos. Parameter ISO 11992-03:2021 3 to 4 1 to 16 Articulation Angle between towing and towed vehicle 5 to 6 1 to 16 Articulation Angle drawbar and towed vehicle 2.5. The support of all other messages defined within ISO 11992-3:2021 is optional for the towing vehicle and trailer.” 80/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 ANNEX 10 Test procedure to assess the functional compatibility of vehicles equipped with ACSF control lines 1. General 1.1. This annex defines a procedure that may be used to check towing and towed vehicles equipped with an electric control line against the functional and performance requirements referred to in paragraph 5.6.4.1. of this Regulation. Alternative procedures may be used at the discretion of the Technical Service if an equivalent level of checking integrity can be established. 1.2. The references to ISO 12098:2004 within this annex apply to ISO 12098 for 24V applications and ISO 12098 for 12V applications. 2. Information document 2.1. The vehicle manufacturer/system supplier shall supply to the Technical Service an information document that contains at least the following: 2.1.1. A schematic of the vehicle ACSF; 2.1.2. Evidence that the interface, including the physical layer, data link layer and the application layer and the respective position of supported messages and parameters, complies with ISO 11992; 2.1.3. A list of supported messages and parameters. 3. Towing vehicles 3.1. ISO 11992 trailer simulator The simulator shall: 3.1.1. Have a connector meeting ISO 12098:2004 (15 pin) to connect to the vehicle under test. Pins 13, 14 and 15 of the connector shall be used to transmit and receive messages complying with ISO 11992-3:2021. 3.1.2. Be capable of receiving all of the messages transmitted by the motor vehicle to be type approved and be capable of transmitting all trailer messages defined within ISO 11992-3:2021. 3.1.3. Provide a direct or indirect readout of messages, with the parameters in the data field shown in the correct order relative to timed. 3.2. Checking procedure 3.2.1. Confirm that the manufacturer's/supplier's information document demonstrates compliance with the provisions of ISO 11992 with respect to the physical layer, data link layer and application layer. 3.2.2. Check the following, with the simulator connected to the motor vehicle via the ISO 12098:2004 interface and whilst all trailer messages relevant to the interface are being transmitted: 3.2.2.1. Control line signalling 3.2.2.1.1. The parameters defined in GPM 11 byte 1 bit 5 -8 and byte 3-8 bit 1 – 16 of ISO 11992-3:2021 shall be checked against the specification of the vehicle. ELI: http://data.europa.eu/eli/reg/2025/3/oj 81/83EN OJ L, 10.1.2025 3.2.2.2. Failure warning 3.2.2.2.1. Simulate a permanent failure in the communication line to pin 14 of the ISO 12098 connector and check that the warning signal of the ACSF specified in paragraph 5.6.4.5.5.1. of this Regulation is displayed. 3.2.2.2.2. Simulate a permanent failure in the communication line to pin 15 of the ISO 12098 connector and check that the warning signal of the ACSF specified in paragraph 5.6.4.5.5.1. of this Regulation is displayed. 3.2.2.2.3. Simulate the failure message required in paragraph 5.6.4.9.2.2. (according to ISO 11992-3:2021) from the trailer and check that the warning signal specified in paragraph 5.6.4.5.5. is displayed. 3.2.3. Additional checks 3.2.3.1. At the discretion of the Technical Service the checking procedures defined above may be repeated with the non- ACSF functions relevant to the interface in different states or switched off. 3.2.3.2. Paragraph 2.4.1. of Annex 9 defines additional messages that shall under specific circumstances be supported by the towing vehicle. Additional checks may be carried out to verify the status of supported messages to ensure the requirements of paragraph 5.6.4.9.1.2. of the Regulation are fulfilled. 4. Trailers 4.1. ISO 11992 towing vehicle simulator The simulator shall: 4.1.1. Have a connector meeting ISO 12098:2004 (15 pin) to connect to the vehicle under test. Pins 13, 14 and 15 of the connector shall be used to transmit and receive messages complying with ISO 11992-3:2021. 4.1.2. Have a failure warning display and an electrical power supply for the trailer; 4.1.3. Shall be capable of receiving all of the messages transmitted by the trailer to be type approved and be capable of transmitting all motor vehicle messages defined within ISO 11992-3:2021. 4.1.4. Provide a direct or indirect readout of messages with the parameters in the data field shown in the correct order relative to time. 4.2. Checking procedure 4.2.1. Confirm that the manufacturer's/supplier's information document demonstrates compliance with the provisions of ISO 11992 with respect to the physical layer, data link layer and application layer. 4.2.2. Check the following, with the simulator connected to the trailer via the ISO 12098 interface and whilst all towing vehicle messages relevant to the interface are being transmitted: 4.2.2.1. Control line signalling: Simulate the required messages according to ISO 11992-3:2021 and described in the Annex 9 paragraph 2.1.2., 2.3.1. and 2.4.2. of this Regulation. 4.2.2.2. Failure warning: 4.2.2.2.1. Simulate a permanent failure in the communication line to pin 14 of the ISO 12098 connector and check that the warning signal of the ACSF specified in paragraph 5.6.4.5.5.1. of this Regulation is displayed. 82/83 ELI: http://data.europa.eu/eli/reg/2025/3/ojEN OJ L, 10.1.2025 4.2.2.2.2. Simulate a permanent failure in the communication line to pin 15 of the ISO 12098 connector and check that the warning signal of the ACSF specified in paragraph 5.6.4.5.5.1. of this Regulation is displayed. 4.2.2.2.3. Simulate the failure message required in paragraph 5.6.4.9.2.2. (according to ISO 11992-3:2021) from the trailer and check that the warning message specified in paragraph 5.6.4.5.5.1. is sent. 4.2.3. Additional checks 4.2.3.1. At the discretion of the Technical Service the checking procedures defined above may be repeated with the non- ACSF functions relevant to the interface in different states or switched off. 4.2.3.2. Paragraph 2.4.1.2. of Annex 9 defines additional messages that shall under specific circumstances be supported by the towing vehicle and the towed vehicle. Additional checks may be carried out to verify the status of supported messages to ensure the requirements of paragraph 5.6.4.9.1.2. of the Regulation are fulfilled. ELI: http://data.europa.eu/eli/reg/2025/3/oj 83/83