Regulation No. 125-00

Name:Regulation No. 125-00
Description:Forward Field of Vision of the Motor Vehicle Driver.
Official Title:Uniform Provisions Concerning the Approval of: Motor Vehicles with Regard to the Forward Field of Vision of the Motor Vehicle Driver.
Country:ECE - United Nations
Date of Issue:2007-11-09
Amendment Level:00 Series, Supplement 4
Number of Pages:26
Vehicle Types:Car
Subject Categories:Prior Versions
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Keywords:

approval, vehicle, annex, regulation, reference, paragraph, plane, type, points, appendix, point, figure, angle, horizontal, means, forward, driver, coordinates, field, vision, defined, vertical, grid, marks, position, vehicles, area, obstruction, three-dimensional, windscreen, positions, pillar, date, requirements, relation, table, manufacturer, granted, design, seat-back, line, number, force, entry, range, procedure, regard, extension, production, passing

Text Extract:

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E/ECE/324
) Rev.2/Add.124/Rev.1
E/ECE/TRANS/505 )
January 11, 2013
STATUS OF UNITED NATIONS REGULATION
ECE 125-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
MOTOR VEHICLES WITH REGARD TO THE FORWARD FIELD
OF VISION OF THE MOTOR VEHICLE DRIVER
Incorporating:
00 series of amendments
Date of Entry into Force: 09.11.07
Corr. 1 to the 00 series of amendments
Dated: 23.12.10
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 03.02.08
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 19.08.10
Supplement 3 to the 00 series of amendments
Date of Entry into Force: 09.12.10
Supplement 4 to the 00 series of amendments
Date of Entry into Force: 26.07.12

REGULATION No. 125-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF MOTOR
VEHICLES WITH REGARD TO THE FORWARD FIELD OF VISION
OF THE MOTOR VEHICLE DRIVER
CONTENTS
REGULATION
1. Scope and purpose
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 of 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

REGULATION NO. 125-00
1. SCOPE AND PURPOSE
1.1. This Regulation applies to the 180° forward field of vision of drivers of Category M
vehicles
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 Regulation are so worded as to apply to Category M vehicles in
which the driver is on the left. In Category M vehicles in which the driver is on the right
these requirements shall be applied by inverting the criteria, when appropriate.
2. DEFINITIONS FOR THE PURPOSES 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
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
(see Annex 4, Appendix, Figure 6); 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
Annex 4; all coordinates referred to ground zero shall be based on a vehicle in running
order plus one front-seat passenger, the mass of the passenger being 75 kg ± 1%.
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.

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,
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
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 (00 for the
Regulation in its initial 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 × 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, consisting of:
4.4.1. A circle surrounding the Letter "E" followed by the distinguishing number of the country
which has granted approval ;
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.

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 the outer edge of Section S (see Annex 4, Appendix,
Figure 3).
5.1.2.2. No vehicle shall have more than two A pillars.
5.1.3. Except as provided in Paragraphs 5.1.3.1 or 5.1.3.2., other than the obstructions created by
the A pillars, the fixed or movable vent or side window division bars, outside radio aerials,
rear-view mirrors and windscreen wipers, there should be no obstruction in the driver's 180°
forward direct field of vision below a horizontal plane passing through V , and above three
planes through V , 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)
(ii)
embedded conductors: 0.5 mm,
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.
(b)
Within Zone A located "defrosting/demisting" normally in "zigzag" or sinusoidal form
having the following dimensions:
(i)
(ii)
maximum visible width: 0.030 mm
maximum conductor density:
a. if the conductors are vertical: 8/cm,
b. if the conductors are horizontal: 5/cm.
5.1.3.1 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 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.
5.1.3.2. An obstruction between a plane through V , 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 from V , on an Area "S" as defined in
Paragraph 5.1.3.2.1. does not exceed 20% of this area. 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

5.3.1.2. Table III indicates the further corrections to be made to the X coordinates of P and P when
the horizontal seat-adjustment range as defined in Paragraph 2.16 exceeds 108 mm. The
positive direction for the coordinates is indicated in Annex IV, Appendix, Figure 1.
Table III
Horizontal seat-adjustment range
108 to 120 mm
121 to 132 mm
133 to 145 mm
146 to 158 mm
more than 158 mm
∆x
-13 mm
-22 mm
-32 mm
-42 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 IV, Appendix, Figure 1.
Table IV
Seat-back
angle
(in °)
Horizontal
coordinates
∆x
Vertical
coordinates
∆z
Seat-back
angle
(in °)
Horizontal
coordinates
∆x
Vertical
coordinates
∆z
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
-186 mm
-177 mm
-167 mm
-157 mm
-147 mm
-137 mm
-128 mm
-118 mm
-109 mm
-99 mm
-90 mm
-81 mm
-72 mm
-62 mm
-53 mm
-44 mm
-35 mm
-26 mm
28 mm
27 mm
27 mm
27 mm
26 mm
25 mm
24 mm
23 mm
22 mm
21 mm
20 mm
18 mm
17 mm
15 mm
13 mm
11 mm
9 mm
7 mm
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
-18 mm
-9 mm
0 mm
9 mm
17 mm
26 mm
34 mm
43 mm
51 mm
59 mm
67 mm
76 mm
84 mm
92 mm
100 mm
108 mm
115 mm
123 mm
5 mm
3 mm
0 mm
-3 mm
-5 mm
-8 mm
-11 mm
-14 mm
-18 mm
-21 mm
-24 mm
-28 mm
-32 mm
-35 mm
-39 mm
-43 mm
-48 mm
-52 mm

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 department 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.
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.

ANNEX 1
COMMUNICATION
(Maximum format: A4 (210 mm × 297 mm))
Issued by:
Name of administration
.....................................
.....................................
.....................................
concerning:
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: ............................................................................................

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 (E6) with regard to the driver's forward field of vision pursuant to Regulation No. 125. The
first two digits of the approval number indicate that the approval was granted in accordance with the
requirements of Regulation No. 125 in its original form.

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, 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 of 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.

Figure 2
Observation Points of the A Pillars

Figure 4
Evaluation of Obstructions in the 180°
Forward Direct Field of Vision of the Driver

Figure 6
Level Work Place

Forward Field of Vision of the Motor Vehicle Driver.