Date: 2025-05-21Category: Not ApplicableState: Union GovernmentCountry: Europe
UN Regulation No 125 — Uniform provisions concerning the approval of motor vehicles with regard to the forward field of vision of the motor vehicle driver [2025/891]
## Report on UN Regulation No. 125 - Uniform Provisions Concerning the Approval of Motor Vehicles with Regard to the Forward Field of Vision of the Motor Vehicle Driver
**1. Executive Summary:**
This report analyzes UN Regulation No. 125, which establishes uniform provisions for the approval of motor vehicles concerning the driver's forward field of vision. The regulation aims to ensure an adequate field of vision when the windscreen and other glazed surfaces are dry and clean for category M and N vehicles. The report details the scope, definitions, approval processes, technical specifications, test procedures, and transitional provisions outlined in the regulation. A key aspect addressed is the angle of obstruction created by A-pillars, and how the presence and position of Field of Vision Assistants (FVA) are now considered and assessed. This analysis is based solely on the text provided, and further context from external sources is not included.
**2. Introduction:**
This report aims to provide a comprehensive overview of UN Regulation No. 125 regarding the forward field of vision of motor vehicle drivers. The information presented is exclusively derived from the provided policy text and serves to inform stakeholders about the regulation's requirements, implementation, and expected outcomes.
**3. Policy Overview:**
* **Core Objective(s):** The core objective of this regulation is to ensure an adequate 180-degree forward field of vision for drivers of category M and N vehicles when the windscreen and other glazed surfaces are dry and clean.
**4. Background and Rationale:**
This policy addresses the need to standardize and regulate the forward field of vision in motor vehicles. By setting specific requirements, the policy aims to enhance driver safety by minimizing obstructions and ensuring adequate visibility of the road ahead. The amendment includes specifications relating to Field of Vision Assistants and exemptions for camera monitor devices.
**5. Key Provisions / Changes:**
This is a consolidated regulation incorporating all valid text up to the 03 series of amendments. Key provisions and changes introduced by these amendments, as discernible from the text, include:
* **Expanded Scope:** The regulation explicitly addresses the inclusion and impact of Field of Vision Assistants (FVA) on the driver's field of vision. It defines FVA as "visual information displayed on the vehicle windscreen or other glazed surface to support the awareness of the driver."
* **Specifications Regarding FVA Obstructions:** Specific rules are provided to determine the allowance of obstructions, for vehicles also using FVA technologies.
* **Camera-Monitor Device Exemptions**: Clarifications are made for camera-monitor systems, including their housings and holders, replacing rearview mirrors and monitors, that they are included under exemptions for obstructions of direct view for the same criteria as the devices they replace.
* **Testing and Measurement**: The area "S" is defined, which is a rectangular vertical area located in a plane perpendicular to the X coordinate 1 500 mm forward of the point V, the upper edge defined by a plane passing through V declined forward 1 below the horizontal and the lower edge of the area "S" is defined by a plane passing through V declined forward 4 below the horizontal.
**6. Target Audience and Stakeholders:**
The primary target audience for this regulation consists of:
* Vehicle manufacturers producing category M and N vehicles.
* Technical Services responsible for conducting approval tests.
* Type Approval Authorities.
* Contracting Parties to the Agreement applying this regulation.
**7. Implementation Aspects (Inferred):**
* **Responsible agency/bodies:** Technical Services are responsible for conducting approval tests, and Type Approval Authorities grant approvals. The United Nations Secretariat receives names and addresses of these bodies.
* **Timelines and Procedures:** The regulation outlines specific timelines for the entry into force and application of different series of amendments. Manufacturers must submit vehicle types for approval, and approvals are granted if the vehicle meets the requirements outlined in paragraph 5. The approval process involves assigning an approval number, affixing an approval mark, and communicating approval decisions to relevant parties. Conformity of production is verified periodically, and penalties are imposed for nonconformity.
**8. Expected Outcomes / Impact of Changes:**
The incorporation of the 03 series of amendments, especially concerning Field of Vision Assistants (FVA), is likely intended to:
* Ensure that new technologies aimed at improving driver awareness (FVAs) are implemented without compromising the core requirement of an adequate forward field of vision.
* Provide clear guidelines for assessing the acceptability of obstructions introduced by camera-monitor systems.
* Promote the adoption of innovative solutions while maintaining or enhancing driver safety.
**9. Conclusion:**
UN Regulation No. 125, as amended by the 03 series, establishes critical standards for the forward field of vision of motor vehicle drivers. It addresses vehicle manufacturers and approval authorities. The inclusion of the FVA specifications underscores the regulation's adaptability to technological advancements in the automotive industry, ensuring that new driver assistance systems are implemented safely and effectively. This regulation remains a significant component in ensuring driver safety and is adaptable to changing technology.
Key Entities Referenced
Official Journal EN of the European Union L series 2025/891: Official Journal of the European Union, L series, identified by the number 2025/891.
UNECE: United Nations Economic Commission for Europe.
TRANS/WP.29/343: UNECE status document number TRANS/WP.29/343, related to the status of the 1958 Agreement and annexed regulations.
https://unece.org/status/1958agreementandannexedregulations: URL providing access to the UNECE status document TRANS/WP.29/343.
UN Regulation No 125: United Nations Regulation No 125, concerning the approval of motor vehicles with regard to the forward field of vision of the motor vehicle driver.
03 series of amendments: The 03 series of amendments to UN Regulation No. 125.
ECETRANS/WP.29/2016/15: Document number ECETRANS/WP.29/2016/15, listed as an authentic and legally binding text.
ECETRANS/WP.29/2021/22: Document number ECETRANS/WP.29/2021/22, listed as an authentic and legally binding text.
ECETRANS/WP.29/2021/100: Document number ECETRANS/WP.29/2021/100, listed as an authentic and legally binding text.
ECETRANS/WP.29/2022/24: Document number ECETRANS/WP.29/2022/24, listed as an authentic and legally binding text.
ECETRANS/WP.29/2022/122: Document number ECETRANS/WP.29/2022/122, listed as an authentic and legally binding text.
ECETRANS/WP.29/2023/22: Document number ECETRANS/WP.29/2023/22, listed as an authentic and legally binding text.
ECETRANS/WP.29/1171: Report number ECETRANS/WP.29/1171, specifically paragraph 92, amending another document.
ECETRANS/WP.29/2024/97: Document number ECETRANS/WP.29/2024/97, listed as an authentic and legally binding text.
Mutual Resolution No 1: Mutual Resolution No 1, also referenced as M.R.1, related to the threedimensional reference grid.
ELI: http://data.europa.eu/eli/reg/2025/891/oj: European Legislation Identifier (ELI) for the Official Journal 2025/891.
OJ L, 21.5.2025: Reference to the Official Journal L, dated 21 May 2025.
category M and N vehicles: Vehicle categories M and N, subject to the UN Regulation No 125.
Consolidated Resolution on the Construction of Vehicles R.E.3.: Consolidated Resolution on the Construction of Vehicles R.E.3., document ECETRANS/WP.29/78/Rev.6, para. 2.
ECETRANS/WP.29/78/Rev.6: Document number ECETRANS/WP.29/78/Rev.6, related to the Consolidated Resolution on the Construction of Vehicles R.E.3.
ECETRANS/WP.29/1101/Amend.5: Document number ECETRANS/WP.29/1101/Amend.5, related to Addendum 6 of Mutual Resolution No 1 M.R.1.
UN Regulation No 176: UN Regulation No 176, concerning Field of Vision Assistant.
ECETRANS/WP.29/GRSG/88: Report ECETRANS/WP.29/GRSG/88, paragraph 46.
Agreement ECE/TRANS/505/Rev.2: Agreement ECE/TRANS/505/Rev.2, related to conformity of production.
Belgium: Country, identified by the distinguishing number "6", that has granted approval in accordance with UN Regulation No 125.
Official Journal EN
of the European Union L series
2025/891 21.5.2025
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 125 — Uniform provisions concerning the approval of motor vehicles with regard
to the forward field of vision of the motor vehicle driver [2025/891]
Incorporating all valid text up to:
03 series of amendments – Date of entry into force: 17 May 2025
This document is meant purely as documentation tool. The authentic and legally binding texts are:
ECE/TRANS/WP.29/2016/15
ECE/TRANS/WP.29/2021/22
ECE/TRANS/WP.29/2021/100
ECE/TRANS/WP.29/2022/24
ECE/TRANS/WP.29/2022/122
ECE/TRANS/WP.29/2023/22 (as amended by paragraph 92 of the report ECE/TRANS/WP.29/1171
ECE/TRANS/WP.29/2024/97
CONTENTS
Regulation
1. Scope
2. Definitions for the purpose of this Regulation
3. Application for approval
4. Approval
5. Specifications
6. Test procedure
7. Modification of vehicle type and extension of approval
8. Conformity of production
9. Penalties for non-conformity of production
10. Production definitively discontinued
11. Names and addresses of Technical Services responsible for conducting approval tests, and of Type Approval
Authorities
12. Transitional provisions
Annexes
1 Communication
2 Arrangements of approval marks
3 Procedure for determining the "H" point and the actual torso angle for seating positions in motor vehicles
Appendix 1: Description of the three-dimensional "H" point machine (3-D H machine)
Appendix 2: Three-dimensional reference system
Appendix 3: Reference data concerning seating positions
4 Method for determining the dimensional relationships between the vehicle's primary reference marks and the three-
dimensional reference grid
Appendix
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1. Scope
1.1. This UN Regulation applies to the 180° forward field of vision of drivers of category M and N vehicles(1).
1 1
1.2. Its purpose is to ensure an adequate field of vision when the windscreen and other glazed surfaces are dry and
clean.
1.3. The requirements of this UN Regulation are so worded as to apply to category M and N vehicles in which the
1 1
driver is on the left. In category M and N vehicles in which the driver is on the right these requirements shall
1 1
be applied by inverting the criteria, when appropriate.
2. Definitions for the purpose of this Regulation
2.1. "Approval of a vehicle type" means the full procedure whereby a Contracting Party to the Agreement certifies that a
vehicle type meets the technical requirements of this Regulation.
2.2. "Vehicle type with regard to the field of vision" means vehicles which do not differ in such essential aspects as:
2.2.1. The external and internal forms and arrangements within the area specified in paragraph 1. above which may
affect visibility; and
2.2.2. The shape and dimensions of the windscreen and its mounting.
2.3. "Three-dimensional reference grid"means a reference system which consists of a vertical longitudinal plane X-Z, a
horizontal plane X-Y and a vertical transverse plane Y-Z; the grid is used to determine the dimensional
relationships between the position of design points on drawings and their positions on the actual vehicle. The
procedure for situating the vehicle relative to the grid is specified in Addendum 6 of Mutual Resolution No 1
(M.R.1)(2); all coordinates referred to ground zero shall be based on a vehicle in running order2plus one front-
seat passenger, the mass of the passenger being 75 kg ±1 per cent.
2.3.1. Vehicles fitted with suspension enabling their ground clearance to be adjusted shall be tested under the normal
conditions of use specified by the vehicle manufacturer.
2.4. "Primary reference marks"means holes, surfaces, marks and identification signs on the vehicle body. The type of
reference mark used and the position of each mark relative to the X, Y and Z coordinates of the three-
dimensional reference grid and to a design ground plane shall be specified by the vehicle manufacturer. These
marks may be the control points used for body-assembly purposes.
2.5. "Seat-back angle"means the angle defined in Addendum 6 of Mutual Resolution No 1 (M.R.1) paragraph 1.2.6.
or paragraph 1.2.7.
2.6. "Actual seat-back angle"means the angle defined in Addendum 6 of M.R.1, paragraph 1.2.6.
2.7. "Design seat-back angle"means the angle defined in Addendum 6 of M.R.1, paragraph 1.2.7.
(1) 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/vehicle-regulations/wp29/resolutions.
(2) Addendum 6 of Mutual Resolution No 1 (M.R.1) (document ECE/TRANS/WP.29/1101/Amend.5); see https://unece.org/transport/
vehicle-regulations/wp29/resolutions.
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2.8. "V points" means points whose position in the passenger compartment is determined as a function of vertical
longitudinal planes passing through the centres of the outermost designated seating positions on the front seat
and in relation to the "R" point and the design angle of the seat-back, which points are used for verifying
compliance with the field of vision requirements.
2.9. "R point or seating reference point"means the point defined in Addendum 6 of M.R.1, paragraph 1.2.4.
2.10. "H point"means the point defined in Addendum 6 of M.R.1, paragraph 1.2.3.
2.11. "Windscreen datum points" means points situated at the intersection with the windscreen of lines radiating
forward from the V points to the outer surface of the windscreen.
2.12. "Armoured vehicle" means a vehicle intended for the protection of conveyed passengers and/or goods and
complying with armour plating anti-bullet requirements.
2.13. "Transparent area" means that area of a vehicle windscreen or other glazed surface whose light transmittance
measured at right angles to the surface is not less than 70 per cent. In the case of armoured vehicles the light
transmittance factor is not less than 60 per cent.
2.14. "P points" means the points about which the driver's head rotates when he views objects on a horizontal plane at
eye level.
2.15. "E points" means points representing the centres of the driver's eyes and used to assess the extent to which "A"
pillars obscure the field of vision.
2.16. "A pillar" means any roof support forward of the vertical transverse plane located 68 mm in front of the V
points and includes non-transparent items such as windscreen mouldings and door frames, attached or
contiguous to such a support.
2.17. "Horizontal seat-adjustment range" means the range of normal driving positions designated by the vehicle
manufacturer for the adjustment of the driver's seat in the direction of the X axis (see paragraph 2.3. above).
2.18. "Extended seat-adjustment range" means the range designated by the vehicle manufacturer for the adjustment of
the seat in the direction of the X axis (see paragraph 2.3. above) beyond the range of normal driving positions
specified in paragraph 2.17. above and used for converting seats into beds or facilitating entry to the vehicle.
2.19. Obstructionmeans physical parts or interference in the field of vision reducing perception of light transmittance
with the exception of stray light, e.g. reflection from vehicle interior, sunlight glare.
2.20. Field of Vision Assistant (FVA) means visual information displayed on the vehicle windscreen or other glazed
surface to support the awareness of the driver.
3. Application for approval
3.1. The application for approval of a vehicle type with regard to the driver's field of vision shall be submitted by the
vehicle manufacturer or by his authorized representative.
3.2. It shall be accompanied by the documents mentioned below in triplicate and include the following particulars:
3.2.1. A description of the vehicle type with regard to the items mentioned in paragraph 2.2. above, together with
dimensional drawings and either a photograph or an exploded view of the passenger compartment. The
numbers and/or symbols identifying the vehicle type shall be specified; and
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3.2.2. Particulars of the primary reference marks in sufficient detail to enable them to be readily identified and the
position of each in relation to the others and to the "R" point verified.
3.3. A vehicle representative of the vehicle type to be approved shall be submitted to the Technical Service
conducting the approval tests.
4. Approval
4.1. If the vehicle type submitted for approval pursuant to this Regulation meets the requirements of paragraph 5.
below, approval of that vehicle shall be granted.
4.2. An approval number shall be assigned to each type approved. Its first two digits (at present 01 for the
Regulation in its current form) 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 the same number to the same vehicle type equipped with another type of field of vision, or to
another vehicle type.
4.3. Notice of approval or of refusal or withdrawal of approval pursuant to this Regulation shall be communicated to
the Parties to the Agreement which apply this Regulation by means of a form conforming to the model in
Annex 1 and photographs and/or plans supplied by the applicant being in a format not exceeding A4 (210 x
297 mm), or folded to that format, and on an appropriate scale.
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
conforming to the model described in Annex 2 to this Regulation, 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. above.
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. above need not be repeated; in such a case, the Regulation and approval numbers and the
additional symbols shall be placed in vertical columns to the right of the symbol prescribed in paragraph 4.4.1.
above.
4.6. The approval mark shall be clearly legible and be indelible.
4.7. The approval mark shall be placed close to or on the vehicle data plate.
5. Specifications
5.1. Driver's field of vision.
5.1.1. The transparent area of the windscreen shall include at least the windscreen datum points (see Annex 4,
Appendix, Figure 1):
(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/Amend.3 - https://unece.org/transport/
standards/transport/vehicle-regulations-wp29/resolutions.
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5.1.1.1. A horizontal datum point forward of V and 17° to the left (see Annex 4, Appendix, Figure 1);
1
5.1.1.2. An upper vertical datum point forward of V and 7° above the horizontal;
1
5.1.1.3. A lower vertical datum point forward of V and 5° below the horizontal;
2
5.1.1.4. To verify compliance with the forward-vision requirement on the opposite half of the windscreen,
three additional datum points, symmetrical to the points defined in paragraphs 5.1.1.1. to 5.1.1.3. above in
relation to the median longitudinal plane of the vehicle, are obtained.
5.1.2. The angle of obstruction for each "A" pillar, as described in paragraph 5.1.2.1. below, shall not exceed 6° (see
Annex 4, Appendix, Figure 3). In the case of armoured vehicles that angle shall not exceed 10°.
The angle of obstruction of the "A" pillar on the passenger side, as defined in paragraph 5.1.2.1.2. below, need
not be determined if the two pillars are located symmetrically in relation to the median longitudinal vertical
plane of the vehicle.
5.1.2.1. The angle of obstruction of each "A" pillar shall be measured by superimposing in a plane the following
two horizontal sections:
Section 1: Starting from the Pm point situated at the location defined in paragraph 5.3.1.1. below, draw a
plane forming an angle of 2° upwards in relation to the horizontal plane passing forward
through Pm. Determine the horizontal section of the "A" pillar starting from the foremost point
of the intersection of the "A" pillar and the inclined plane (see Annex 4, Appendix, Figure 2).
Section 2: Repeat the same procedure, taking a plane declining at an angle of 5° downwards in relation to
the horizontal plane passing forward through Pm (see Annex 4, Appendix, Figure 2).
5.1.2.1.1. The angle of obstruction of the "A" pillar on the driver's side is the angle formed on the plane view by a parallel,
starting from E , to the tangent joining E with the outer edge of section S and the tangent joining E to the
2 1 2 2
inner edge of section S (see Annex 4, Appendix, Figure 3).
1
5.1.2.1.2. The angle of obstruction of the "A" pillar on the passenger side is the angle formed on the plane view by the
tangent joining E to the inner edge of section S and a parallel, starting from E , to the tangent joining E to
3 1 3 4
the outer edge of section S (see Annex 4, Appendix, Figure 3).
2
5.1.2.2. No vehicle shall have more than two "A" pillars.
5.1.3 Except as provided in paragraph 5.1.3.3., 5.1.3.4. or 5.1.3.5 below, other than the obstructions created by the
"A" pillars, the fixed or movable vent or side window division bars, outside radio aerials, devices for indirect
vision, covering the mandatory field of indirect vision, and windscreen wipers, there shall be. no obstruction in
the driver’s 180° forward direct field of vision below a horizontal plane passing through V , and above three
1
planes through V2, one being perpendicular to the plane X-Z and declining forward 4° below the horizontal,
and the other two being perpendicular to the plane Y-Z and declining 4° below the horizontal (see Annex 4,
Appendix, Figure 4).
The following are not considered to be obstructions to the field of vision:
(a) Embedded or printed "radio aerial" conductors, no wider than the following:
(i) Embedded conductors: 0,5 mm,
(ii) Printed conductors: 1,0 mm. These "radio aerial" conductors shall not cross zone A. However,
three "radio aerial" conductors may cross zone A if their width does not exceed 0,5 mm.
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(b) Within zone A located "defrosting/demisting" normally in "zigzag" or sinusoidal form having the
following dimensions:
(i) Maximum visible width: 0,030 mm,
(ii) Maximum conductor density:
a. If the conductors are vertical: 8/cm,
b. If the conductors are horizontal: 5/cm.
5.1.3.1. In case of camera monitor devices, the exemptions of paragraph 5.1.3. apply to cameras including their holders
and housings which are mounted to the vehicle exterior. The camera-monitor system replacing a rear-view Class
I mirror shall have the same exemption.
5.1.3.2. For vehicles, which are equipped as standard with approved rear-view mirrors that are optionally replaced by
camera-monitor devices, the exemptions of paragraph 5.1.3. apply also to monitors, provided(4):
(a) Their obstruction of the direct view does not exceed the level of obstruction of the corresponding exterior
rear-view mirror including its housing and holder, and;
(b) The position of the monitor is as close as practicable to the position of the rear-view mirror it replaces.
5.1.3.3. An obstruction created by the steering-wheel rim and the instrument panel inside the steering wheel will be
tolerated if a plane through V , perpendicular to the plane x - z and tangential to the highest part of the
2
steering-wheel rim, is declined at least 1° below the horizontal.
The steering wheel, if adjustable, shall be placed in the normal position indicated by the manufacturer or, failing
that, midway between the limits of its range(s) of adjustment.
5.1.3.4. An obstruction between a plane through V2, and declined at least 1° below the horizontal and a plane through
V and declined 4° below the horizontal will be tolerated if the conical projection of this obstruction, starting
2
from V2, on an area "S" as defined in paragraph 5.1.3.4.1. below does not exceed 20 per cent of this area. With
regard to FVA, if applicable, potential obstructions in area "S" from opaque pixels as defined in paragraph 2.19.
of UN Regulation No 176, 00 series of amendments, shall be considered.
5.1.3.4.1. The area "S" (see Annex 4, Appendix, Figure 7) is a rectangular vertical area located in a plane perpendicular to
the X coordinate 1 500 mm forward of the point V . The upper edge of the area "S" is defined by a plane passing
2
through V declined forward 1° below the horizontal. The lower edge of the area "S" is defined by a plane
2
passing through V declined forward 4° below the horizontal. The left and right edges of the area "S" are
2
vertical and generated from the intersection lines of the three planes declined 4° as defined in paragraph 5.1.3.
above.
5.1.3.4.2. In the case of a windscreen extending beyond 1 500 mm forward of the point V , the distance between the area
2
"S" and the point V may be extended accordingly.
2
5.1.3.5. The transparent field of vision as defined in paragraph 5.1.1. may be overlaid by information of a Field of Vision
Assistant, meeting the requirements of UN Regulation No 176.
(4) See report ECE/TRANS/WP.29/GRSG/88, paragraph 46 on the period of application of this paragraph.
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5.1.4. In the case where the height of V above the ground exceeds 1 650 mm, the following requirement shall be met:
2
A 1 200 mm tall cylindrical object with a diameter of 300 mm that is situated inside the space bounded by a
vertical plane located 2 000 mm in front of the vehicle, a vertical plane located 2 300 mm in front of the
vehicle, a vertical plane located 400 mm from the driver's side of the vehicle, and a vertical plane located
600 mm from the opposite side of the vehicle shall be at least partially visible when viewed directly from V
2
(see Figure 1), regardless of where the object is within that space, unless it is invisible due to a blind spot(s)
created by the A pillars, windscreen wipers, or steering wheel.
If the driver's seat is located in the central driving position of the vehicle, the 1 200 mm tall cylindrical object
shall be situated inside the space bounded by a vertical plane located 2 000 mm in front of the vehicle, a
vertical plane located 2 300 mm in front of the vehicle, a vertical plane located 500 mm from the side of the
vehicle (see Figure 2).
Figure 1 Figure 2
5.2. Position of the V points
5.2.1. The position of the V points in relation to the "R" point, as indicated by XYZ coordinates from the three
dimensional reference grid, are as shown in Tables I and IV.
5.2.2. Table I indicates the basic coordinates for a design seat-back angle of 25°. The positive direction for the
coordinates is indicated in Annex 4, Appendix, Figure 1.
Table I
V-point X Y Z
V 68 mm - 5 mm 665 mm
1
V 68 mm - 5 mm 589 mm
2
5.3. Position of the P points
5.3.1. The position of the P points in relation to the "R" point, as indicated by the XYZ coordinates from the three-
dimensional reference grid, are as shown by Tables II, III and IV.
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5.3.1.1. Table II sets out the base coordinates for a design seat-back angle of 25°. The positive direction of the
coordinates is set out in Annex 4, Appendix, Figure 1.
The Pm point is the point of intersection between the straight line joining P , P and the longitudinal vertical
1 2
plane passing through the "R" point.
Table II
Point P X Y Z
P 35 mm - 20 mm 627 mm
1
P 63 mm 47 mm 627 mm
2
Pm 43,36 mm 0 mm 627 mm
5.3.1.2. Table III indicates the further corrections to be made to the X coordinates of P and P when the horizontal seat-
1 2
adjustment range as defined in paragraph 2.16. above exceeds 108 mm. The positive direction for the
coordinates is indicated in Annex 4, Appendix, Figure 1.
Table III
Horizontal seat-adjustment range Δx
108 to 120 mm - 13 mm
121 to 132 mm - 22 mm
133 to 145 mm - 32 mm
146 to 158 mm - 42 mm
more than 158 mm - 48 mm
5.4. Correction for design seat-back angles other than 25°
Table IV indicates the further corrections to be made to the X and Z coordinates of each P point and each V
point when the design seat-back angle is not 25°. The positive direction for the coordinates is indicated in
Annex 4, Appendix, Figure 1.
Table IV
Seat-back Horizontal Vertical Seat-back Horizontal Vertical
angle (in °) coordinates Δx coordinates Δz angle (in °) coordinates Δx coordinates Δz
5 - 186 mm 28 mm 23 - 18 mm 5 mm
6 - 177 mm 27 mm 24 - 9 mm 3 mm
7 - 167 mm 27 mm 25 0 mm 0 mm
8 - 157 mm 27 mm 26 9 mm - 3 mm
9 - 147 mm 26 mm 27 17 mm - 5 mm
10 - 137 mm 25 mm 28 26 mm - 8 mm
11 - 128 mm 24 mm 29 34 mm - 11 mm
12 - 118 mm 23 mm 30 43 mm - 14 mm
13 - 109 mm 22 mm 31 51 mm - 18 mm
14 - 99 mm 21 mm 32 59 mm - 21 mm
15 - 90 mm 20 mm 33 67 mm - 24 mm
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Seat-back Horizontal Vertical Seat-back Horizontal Vertical
angle (in °) coordinates Δx coordinates Δz angle (in °) coordinates Δx coordinates Δz
16 - 81 mm 18 mm 34 76 mm - 28 mm
17 - 72 mm 17 mm 35 84 mm - 32 mm
18 - 62 mm 15 mm 36 92 mm - 35 mm
19 - 53 mm 13 mm 37 100 mm - 39 mm
20 - 44 mm 11 mm 38 108 mm - 43 mm
21 - 35 mm 9 mm 39 115 mm - 48 mm
22 - 26 mm 7 mm 40 123 mm - 52 mm
5.5. Position of the E points
5.5.1. E and E points are each 104 mm from P .
1 2 1
E is 65 mm from E (see Annex 4, Appendix, Figure 4).
2 1
5.5.2. The straight line joining E and E is rotated about P until the tangent joining E to the outer edge of Section 2
1 2 1 1
of the "A" pillar on the driver's side is normal to the straight line E - E (see Annex 4, Appendix, Figure 3).
1 2
5.5.3. E and E are each 104 mm from point P . E is 65 mm from E (see Annex 4, Appendix, Figure 4).
3 4 2 3 4
5.5.4. The straight line E - E is rotated about P until the tangent joining E to the outer edge of Section 2 of the "A"
3 4 2 4
pillar on the passenger's side is normal to the straight line E - E (see Annex 4, Appendix, Figure 3).
3 4
6. Test procedure
6.1. Driver's field of vision
6.1.1. The dimensional relationships between the vehicle's primary reference marks and the three - dimensional
reference grid shall be determined by the procedure prescribed in Annex 4.
6.1.2. The position of the points V and V is determined in relation to the "R" point as indicated by the XYZ
1 2
coordinates of the three-dimensional reference grid and are shown in Table I under paragraph 5.2.2. above and
Table IV under paragraph 5.4. above. The windscreen datum points shall then be found from the corrected V
points as prescribed in paragraph 5.1.1. above.
6.1.3. The relationship between the P points, the "R" point, and the centre-line of the driver's seating position, as
indicated by XYZ coordinates from the three-dimensional reference grid, shall be determined from Tables II
and III in paragraph 5.3. above. The correction for design seat-back angles other than 25° is shown in Table IV
under paragraph 5.4. above.
6.1.4. The angle of obstruction (see paragraph 5.1.2. above) shall be measured in the inclined planes, as indicated in
Annex 4, Appendix, Figure 2. The relationship between P and P , which are connected to E and E and E
1 2 1 2 3
and E respectively, is shown in Annex 4, Appendix, Figure 5.
4
6.1.4.1. Straight line E - E shall be set as described in paragraph 5.5.2. above. The angle of obstruction of the "A" pillar
1 2
on the driver's side shall be measured as specified in paragraph 5.1.2.1.1. above.
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6.1.4.2. Straight line E - E shall be set as described in paragraph 5.5.4. above. The angle of obstruction of the "A" pillar
3 4
on the passenger side shall then be measured as specified in paragraph 5.1.2.1.2. above.
6.1.5. The manufacturer may measure the angle of obstruction either on the vehicle or in the drawings. In the event of
doubt the Technical Services may require the tests be carried out on the vehicle.
6.2.1 The steering wheel, if adjustable, shall be placed in the normal position indicated by the manufacturer or, failing
that, midway between the limits of its range(s) of adjustment
6.2.2. In the case the FVA position is adjustable, the FVA shall be placed in the normal position indicated by the
manufacturer or, failing that, midway between the limits of the range of adjustment.
7. Modification of vehicle type and extension of approval
7.1. Every modification of the vehicle type as defined in paragraph 2.2. above shall be notified to the Type Approval
Authority which approved the vehicle type. The Type Approval Authority may then either:
7.1.1. Consider that the modifications made do not have an adverse effect on the conditions of the granting of the
approval and grant an extension of approval;
7.1.2. Consider that the modifications made affect the conditions of the granting of the approval and require further
tests or additional checks before granting an extension of approval.
7.2. Confirmation or refusal of approval, specifying the alterations, shall be communicated by the procedure
specified in paragraph 4.3. above to the Contracting Parties to the Agreement which apply this Regulation.
7.3. The Type Approval Authority shall inform the other Contracting Parties of the extension by means of the
communication form which appears in Annex 2 to this Regulation. It shall assign a serial number to each
extension, to be known as the extension number.
8. Conformity of production
8.1. Procedures concerning conformity of production shall conform to the general provisions defined in Appendix 2
to the Agreement (E/ECE/324-E/ECE/TRANS/505/Rev.2) and meet the following requirements:
8.2. A vehicle approved pursuant to this Regulation shall be so manufactured as to conform to the type approved by
meeting the requirements of paragraph 5. above;
8.3. The Type Approval Authority which has granted approval may at any time verify the conformity of control
methods applicable to each production unit. The normal frequency of such inspections shall be once every
two years.
9. Penalties for non-conformity of production
9.1. The approval granted in respect of a vehicle type pursuant to this Regulation may be withdrawn if the
requirements laid down in paragraph 8. above are not complied with.
9.2. If a Contracting Party withdraws an approval it had previously granted, it shall forthwith so notify the other
Contracting Parties applying this Regulation by sending them a communication form conforming to the model
in Annex 1 to this Regulation.
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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, which in turn
shall forthwith inform the other Contracting Parties to the 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 the Technical Services responsible for conducting approval tests and of Type Approval
Authorities
The Contracting Parties to the 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 are to be sent.
12. Transitional provisions
12.1. As from the official date of entry into force of the 01 series of amendments, no Contracting Party applying this
Regulation shall refuse to grant approval under this Regulation as amended by the 01 series of amendments.
12.2. As from 24 months after the date of entry into force of the 01 series of amendments to this Regulation,
Contracting Parties applying this Regulation shall grant approvals only if the vehicle type to be approved meets
the requirements of this Regulation as amended by the 01 series of amendments.
12.3. Contracting Parties applying this Regulation shall not refuse to grant extensions of approvals for existing types
which have been granted according to the original version of this Regulation.
12.4. Even after the entry into force of the 01 series of amendments to this Regulation, type approvals of the vehicles
to the original version of this Regulation shall remain valid. Contracting Parties applying this Regulation shall
continue to accept them.
12.5. Notwithstanding the transitional provisions above, Contracting Parties whose application of this Regulation
comes into force after the date of entry into force of the 01 series of amendments are not obliged to accept
approvals which were granted in accordance with the original version of this Regulation.
12.6. 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 type approvals under this Regulation as amended by the 02
series of amendments.
12.7. As from 1 September 2023, Contracting Parties applying this Regulation shall not be obliged to accept type
approvals to the preceding series of amendments, first issued after 1 September 2023.
12.8. Until 1 September 2024 Contracting Parties applying this Regulation shall accept type approvals to the
preceding series of amendments, first issued before 1 September 2023.
12.9. As from 1 September 2024, Contracting Parties applying this Regulation shall not be obliged to accept type
approvals issued to the preceding series of amendments to this Regulation.
12.10. Notwithstanding the transitional provisions above, Contracting Parties who start to apply this Regulation after
the date of entry into force of the most recent series of amendments are not obliged to accept type approvals
which were granted in accordance with any of the preceding series of amendments to this Regulation.
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12.11. Notwithstanding paragraph 12.4, Contracting Parties applying this Regulation shall continue to accept type
approvals issued according to the preceding series of amendments to this Regulation, for the vehicles/vehicle
systems which are not affected by the changes introduced by the 02 series of amendments.
12.12. 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 type approvals under this Regulation as amended by the 03
series of amendments.
12.13. As from 1 September 2026, Contracting Parties applying this Regulation shall not be obliged to accept type
approvals to the preceding series of amendments, first issued after 1 September 2026.
12.14. Until 1 September 2030 Contracting Parties applying this Regulation shall accept type approvals to the
preceding series of amendments, first issued before 1 September 2026.
12.15. As from 1 September 2030, Contracting Parties applying this Regulation shall not be obliged to accept type
approvals issued to the preceding series of amendments to this Regulation.
12.16. Notwithstanding paragraph 12.13. and 12.15., Contracting Parties applying this Regulation shall continue to
accept type approvals issued according to the preceding series of amendments to this Regulation, for vehicles
types which are not affected by the changes introduced by the 03 series of amendments (i.e. vehicles not
equipped with FVA).
12.17. Contracting Parties applying this Regulation may grant type approvals according to any preceding series of
amendments to this Regulation.
12.18. Contracting Parties applying this Regulation shall continue to grant extensions of existing approvals to any
preceding series of amendments to this Regulation.
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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 type of vehicle with regard to the driver's forward field of vision pursuant to Regulation No 125
Approval No.................................................. Extension No..................................................
1. Trademark: .............................................................................................................
2. Type and trade name(s): .................................................................................................
3. Name and address of manufacturer: ....................................................................................
4. If applicable, name and address of manufacturer's representative: ......................................................
..........................................................................................................................
5. Brief description of vehicle: .............................................................................................
6. Data to enable the identification of reference point "R" of the seating position designated for the driver in relation to
the primary reference marks: ...........................................................................................
7. Identification, place and relative positions of the primary reference marks: ............................................
8. Date of submission of vehicle for approval:.............................................................................
9. Technical Service performing the approval tests: .......................................................................
10. Date of report issued by that Service: ...................................................................................
11. Number of report issued by that Service: ...............................................................................
12. Approval with regard to the driver's field of vision is granted/refused2:
13. Place: ....................................................................................................................
14. Date:.....................................................................................................................
15. Signature:................................................................................................................
(1) Distinguishing number of the country which has granted/extended/refused/withdrawn approval (see approval provisions in the
Regulation).
(2) Delete what does not apply.
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16. Annexed to this communication are the following documents, bearing the approval number indicated above:
..........................................................dimensional drawings
..........................................................exploded view or photograph of the passenger compartment
17. Any remarks:............................................................................................................
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ANNEX 2
Arrangements of approval marks
(see paragraphs 4.4. to 4.4.2. 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 Belgium (E 6)
with regard to the driver's forward field of vision pursuant to UN Regulation No 125. The first two digits of the approval
number indicate that the approval was granted in accordance with the requirements of UN Regulation No 125 as amended
by the 03 series of amendments."
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ANNEX 3
Procedure for determining the "H" point and the actual torso angle for seating positions in motor vehicles(1)
Appendix 1 - Description of the three dimensional "H" point machine (3-D H machine)1
Appendix 2 - Three-dimensional reference system1
Appendix 3 - Reference data concerning seating positions1
(1) This procedure is described in Addendum 6 of Mutual Resolution No 1 (M.R.1) (document ECE/TRANS/WP.29/1101/Amend.5); see
https://unece.org/transport/vehicle-regulations/wp29/resolutions.
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ANNEX 4
Method for determining the dimensional relationships between the vehicle's primary reference marks and the
three-dimensional reference grid
1. Relationship between reference grid and vehicle's primary reference marks
To verify specific dimensions on or within a vehicle submitted for approval in accordance with this Regulation, the
relationship between the coordinates of the three-dimensional reference grid, defined in paragraph 2.3. of this
Regulation, which has been laid out at the initial vehicle-design stage, and the positions of the primary reference
marks, defined in paragraph 2.4. of this Regulation, shall be established accurately so that specific points on the
vehicle manufacturer's drawings can be identified on an actual vehicle produced from those drawings.
2. Method for establishing relationship of reference grid to reference marks
For this purpose, a ground reference plane shall be constructed which is marked with the X-X measurement and the
Y-Y measurement. The method of achieving this is set out in Figure 6 of the Appendix to this annex, the reference
plane being a hard, flat, level surface upon which the vehicle stands, and which has two measuring scales firmly
fixed to its surface; these shall be graduated in millimetres, the X-X scale being not less than eight metres long and
the Y-Y scale not less than four metres long. The two scales shall be set at right angles to each other as shown in
Figure 6 of the Appendix to this annex. The intersection of these scales is the ground zero.
3. Examination of the reference plane
In order to provide for minor variations in the level of the reference plane or test area, it will be necessary to measure
the deviations from ground zero along both the X and Y scales at intervals of 250 mm and to record the readings
obtained so that corrections can be made when checking the vehicle.
4. Actual test attitude
In order to provide for minor changes in suspension height, etc., it will be necessary to have available a means of
bringing the reference marks to the correct coordinate positions relative to the design attitude before further
measurements are taken. In addition, it shall be possible to make minor lateral and/or longitudinal adjustments of
the vehicle's position so as to place it accurately in relation to the reference grid.
5. Results
The vehicle having been correctly placed relative to the reference grid and in its design attitude, the site of the
necessary points for studying the forward visibility requirements can be readily determined.
Test methods to determine these requirements may include the use of theodolites, light sources or shadow devices, or
any other method, which can be shown to give equivalent results.
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Annex 4 – Appendix
Figure 1
Determination of V points
(1) Line tracing the median longitudinal plane of the vehicle.
(2) Line tracing the vertical plane passing through R.
(3) Line tracing the vertical plane passing through V and V .
1 2
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Figure 2
Observation points of the "A" pillars
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Figure 3
Angles of obstruction
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Figure 4
Evaluation of obstructions in the 180° forward direct field of vision of the driver
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Figure 5
Dimensional diagram showing relative positions of E points and P points
Figure 6
Level work place
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Figure 7
Definition of the area "S"
(paragraph 5.1.3.2. of this Regulation)
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