Regulation No. 71-00

Name:Regulation No. 71-00
Description:Driver Field of Vision.
Official Title:Uniform Provisions Concerning the Approval of: Agricultural Tractors with Regard to the Driver's Field of Vision.
Country:ECE - United Nations
Date of Issue:1987-10-28
Amendment Level:00 Series
Number of Pages:15
Vehicle Types:Agricultural Tractor
Subject Categories:Driver's Vision
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Keywords:

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Text Extract:

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E/ECE/324 )
E/ECE/TRANS/505 ) Rev.1/Add.70
October 28, 1987
STATUS OF UNITED NATIONS REGULATION
ECE 71
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
AGRICULTURAL TRACTORS WITH REGARD TO THE DRIVER'S FIELD OF VISION
Incorporating:
00 series of amendments Date of Entry into Force: 01.08.87

REGULATION NO. 71
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF AGRICULTURAL TRACTORS
WITH REGARD TO THE DRIVER'S FIELD OF VISION
REGULATION
1. Scope
2. Definitions
3. Application for approval
4. Approval
5. Specification
CONTENTS
6. Modifications of the Tractor Type and Extension of Approval
7. Conformity of Production
8. Penalties for Non-conformity of Production
9. Production Definitely Discontinued
10. Names and Addresses of Technical Services Responsible for Conducting Approval Tests,
and of Administrative Departments
ANNEXES
Annex 1

Communication Concerning the Approval or Refusal or Extension or Withdrawal of
Approval or Production Definitely Discontinued of a Tractor Type with Regard to the
Driver's Field of Vision, Pursuant to Regulation No. 71.
Annex 2 – Arrangements of Approval Marks.

2.8. "Area of vision" means that part of the field of vision which is delimited:
2.8.1. in an upward direction by a horizontal plane passing through the reference point,
2.8.2. on the plane of the road by the area, situated outside the semi-circle of vision, which
extends the area of the semi-circle of vision, whose chord, 9.5 m in length, is perpendicular
to and bisected by the plane parallel to the median longitudinal plane of the tractor passing
through the middle of the driver's seat;
2.9. "Operating area of the windscreen wipers" means the external surface of the windscreen
which is swept by the windscreen wipers.
3. APPLICATION FOR APPROVAL
3.1. The application for approval of a tractor with regard to the driver's field of vision shall be
submitted by the manufacturer of the tractor or by his duly accredited representative.
3.2. It shall be accompanied by the under-mentioned documents in triplicate, and by the
following particulars:
3.2.1. A description of the tractor with regard to the points mentioned in Paragraph 2.3. above,
together with dimensioned drawings and tyre sizes designated by the manufacturer and
either a photograph or an exploded view of the passenger compartment; the numbers
and/or symbols identifying the tractor type shall be specified;
3.2.2. Particulars of the position of the reference point in relation to any obstacles to the driver's
vision, the particulars being sufficiently detailed for, inter alia, calculation of the masking
effects according to the formula given in Paragraph 5.2.2.2.
3.3. A tractor representative of the tractor type to be approved shall he submitted to the technical
service responsible for conducting approval tests.
4. APPROVAL
4.1. If the tractor type submitted for approval pursuant to this Regulation meets the requirements
of Paragraph 5 below, approval of that tractor type shall be granted.
4.2. An approval number shall be assigned to each type-approved. Its first two digits (at present
00 for the Regulation in its original 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 another tractor type as defined in Paragraph 2.3. above.
4.3. Notice of approval or of refusal or of extension or withdrawal of approval or production
definitely discontinued of a tractor type pursuant to this Regulation shall be communicated
to the Parties to the Agreement applying this Regulation, by means of a form conforming to
the model in Annex 1 to this Regulation.

5.2. Verification of Field of Vision
5.2.1. Procedure for Determining Masking Effects.
5.2.1.1. The tractor shall be placed on a horizontal surface as shown in Figure 2. On a horizontal
support level with the reference point, there shall be mounted two point sources of light, e.g.
2 x 150 W, 12 V, 65 mm apart and symmetrically located with respect to the reference point.
The support shall be rotatable at its centre point about a vertical axis passing through the
reference point. For the purpose of measuring the masking effects, the support shall be so
aligned that the line joining the two light sources is perpendicular to the line joining the
masking component and the reference point. The most adverse arrangement of tyre
equipment shall be fitted. The silhouette (deepest shadow) overlaps projected onto the
semi-circle of vision by the masking component when the light sources are switched on
simultaneously or alternately shall be measured in accordance with Paragraph 2.7.
(Figure 3).
5.2.1.2. Each masking effect shall not exceed 700 mm.
5.2.1.3. Masking effects due to adjacent structural components over 80 mm in width shall be so
disposed that there is an interval of at least 2 200 mm - measured as a chord of the
semi-circle of vision - between the centres of two masking effects.
5.2.1.4. There shall not be more than six masking effects in the semi-circle of vision as a whole, nor
more than two within the area of vision referred to in Paragraph 2.8.
5.2.1.5. Masking effects exceeding 700 mm but not exceeding 1 500 mm are, however, permissible
if the components causing them cannot be redesigned or relocated. Outside the sector of
vision, there may be on each side a total of either
5.2.1.5.1. two such masking effects, one not exceeding 700 mm and the other not exceeding
1 500 mm, or
5.2.1.5.2. two such masking effects, neither exceeding 1 200 mm.
5.2.1.6. Any obstruction of vision caused by the presence of rear-view mirrors of an authorized
model shall not be taken into consideration if such mirrors cannot be positioned differently.
5.2.2. Mathematical Determination of Binocular-Vision Masking Effects.
5.2.2.1. The admissibility of various masking effects may be verified mathematically rather than
through the verification procedure referred to in Paragraph 5.2.1. The extent, distribution
and number of masking effects shall be governed by Paragraphs 5.2.1.3. to 5.2.1.6.

7. CONFORMITY OF PRODUCTION
7.1. Every tractor bearing an approval mark as prescribed by this Regulation shall conform to the
tractor type-approved and satisfy the requirements of Paragraph 5 above.
7.2. In order to verify conformity as prescribed in Paragraph 7.1. above, a sufficient number of
random checks shall be made on serially-manufactured tractors bearing the approval mark
required under this Regulation.
8. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
8.1. The approval granted in respect of a tractor type pursuant to this Regulation may be
withdrawn if the requirements laid down in Paragraph 7.1. are not complied with or if the
tractor fails to pass the checks prescribed in Paragraph 7 above.
8.2. If a Party to the Agreement which applies 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 copy of the approval form bearing at the end, in large letters, the
signed and dated annotation "APPROVAL WITHDRAWN".
9. PRODUCTION DEFINITELY DISCONTINUED
If the holder of the approval completely ceases to manufacture a tractor type-approved in
accordance with this Regulation, he shall so inform the authority which granted the
approval. Upon receiving the relevant communication that authority shall inform thereof the
other Parties to the Agreement applying this Regulation by means of a copy of the approval
form bearing at the end, in large letters, the signed and dated annotation "PRODUCTION
DISCONTINUED".
10. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS, AND OF ADMINISTRATIVE DEPARTMENTS
The 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 administrative departments which grant approval and
to which forms certifying approval or refusal or extension or withdrawal of approval, issued
in other countries, are to be sent.

Figure 2

ANNEX 1
(Maximum format: A 4 (210 x 297 mm))
Communication concerning:
approval
refusal of approval
extension of approval
withdrawal of approval
production definitely
discontinued
of a tractor type with regard to the driver's field of vision,
pursuant to Regulation No. 71.
Approval No...................................................
Extension No .................................
1.
Trade name or mark of tractor ...................................................................................................
2.
Tractor type ................................................................................................................................
3.
Manufacturer's name and address ............................................................................................
4.
If applicable, name and address of manufacturer's representative ...........................................
...................................................................................................................................................
5.
Brief description of tractor ..........................................................................................................
6.
The most adverse arrangement of tyre equipment for forward vision (front, rear) ....................
7.
Tractor submitted for approval on ..............................................................................................
8.
Technical service responsible for conducting approval tests
...................................................................................................................................................
9.
Date of report issued by that service .........................................................................................
10.
Number of report issued by that service ....................................................................................
11.
Approval granted/refused/extended/withdrawn
......................................................................
12.
Reason(s) of extension (if applicable)........................................................................................
13.
Site of approval mark on tractor.................................................................................................
14.
Place .........................................................................................................................................

ANNEX 2
ARRANGEMENTS OF APPROVAL MARKS
Model A
(See Paragraph 4.4 of this Regulation)
The above approval mark affixed to a tractor shows that the tractor type concerned has, with regard to
the driver's field of vision, been approved in the Netherlands (E 4) pursuant to Regulation No. 71 under
the approval number 002439. The first two digits of the approval number indicate that the approval was
granted in accordance with the requirements of Regulation No. 71 in its original form.
Model B
(See paragraph 4.5 of this Regulation)
a
= 8 mm min.
The above approval mark affixed to a tractor shows that the tractor type concerned has, been approved
in the Netherlands (E 4) pursuant to Regulation No. 71 and 33. The first two digits of the approval
number indicate that, at the dates when the respective approval were granted, Regulation No. 71 had not
been modified, and Regulation No 33 already included the 01 series of amendments.
Driver Field of Vision.