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IS0
I N TE R NAT1 O N AL O R GAN I ZATl O N FOR STAN DARD I ZAT I O N
IS0 RECOMMENDATION
R 303
LIGHTING AND SIGNALLING
FOR MOTOR VEHICLES AND TRAILERS
1 st E D IT1 ON
May 1963
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards belongs
to IS0 Member Bodies. Reproduction of these documents, in any
country, may be authorized therefore only by the national standards
organization of that country, being a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national
standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 303, Lighting and Signalling for Motor Vehicles and Trailers, was
drawn up by Technical Committee ISû/TC 22, Autoniohiles, the Secretariat of which is held by the
Association Française de Normalisation (AFNOR).
Work on this question by the Technical Committee began in 1947, taking into account the studies
which had been made by the former International Federation of the National Standardizing
Associations (ISA), and led, in 1953, to the adoption of a Draft IS0 Recommendation.
This first Draft IS0 Recommendation (NO 38) was circulated to all the IS0 Member Bodies
for enquiry in June 1954. As the results of this consultation were not considered satisfactory, the
Technical Committee successively put forward a second and a third Draft IS0 Recommendation,
which were circulated in May 1958 and in April 1960 respectively.
This third Draft was approved, subject to a few modifications of an editorial nature, by the
following Member Bodies :
Poland
Belgium Greece
Burma Ireland Romania
Colombia Italy Spain
Czechoslovakia Japan Sweden
Denmark Netherlands Switzerland
France New Zealand United Kingdom
Yugoslavia
Three Member Bodies opposed the approval of the Draft:
Germany, U. S.A., U.S.S. R.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council,
which decided, in May 1963, to accept it as an IS0 RECOMMENDATION.
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IS0 / R 303 - 1963 (E)
TABLE OF CONTENTS
INTRODUCTION
Pages
Purpose. . 5
Scope . 5
Plan for Study. . 5
I. ILLUMlNATING LIGHTS
1. Driving beam ~- Upper beam .
9
2. Meeting beam - Lower beam. . 11
3. Fog light - Fog lamp . 13
II. SIGNALLING LIGHTS
(a) Lights used by day and by night
4. Direction indicator -Turn signal light .
15
5. Stop light - Stop lamp. . 19
(b) Lights used generally by night
6. Rear number plate light - Rear licence plate lamp . 21
7. Side light - Parking lamp . 23
8. Red tail light - Tail lamp . 25
9. Parking light - Side parking lamp . 27
10. Rear red reflex reflector . 29
1 I. Trailer reflex reflector . 31
APPENDICES
A Multilingual terminology of lights and signals. .
33
B* Illuminating beams .
Part 1 : American Beam .
Part 2: British Beam .
Part 3 : Unified European Beam. .
C* Headlamp mounting .
D Colorimetric characteristics of illuminating and signalling lights . 37
* To be included at a later date.
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lSO/ R303- 1963 (E) rn
IS0 Recommendation R 303 May 1963
LIGHTING AND SIGNALLING
FOR MOTOR VEHICLES AND TRAILERS
INTRODUCTION
PURPOSE
This IS0 Recommendation deals with the main characteristics of Lighting and Signalling for Motor
Vehicles and Trailers.
Attention is drawn to the fact that some of the provisions are likely to be modified and amplified
to take into account technical advances and progressive changes in regulations.
SCOPE
The provisions of this IS0 Recommendation cover motor vehicles for general purposes and their
trailers. They do not apply to
(a) vehicles of special design intended for purposes other than the transport of people or goods;
(b) motor cycles.
These provisions deal mainly with emitted light. However, on account of the close relationship
between the light and the emitting device, in certain cases some data concerning mechanical or
electrical features of lighting or signalling equipment have been specified.
These data are given in the appendices.
Photometric characteristics of certain lights are not dealt with in this document, being at present
under study. *
PLAN FOR STUDY
This document is arranged according to the approved plan explained below.
The numbers of the items are repeated throughout the document for the numbers of the correspon-
ding clauses of the various sections.
Item 1.
Terminology General definitions. A vehicle is fitted with lighting devices, the pur-
pose of which is to show “lights”.
According to their uses, these lights are divided into two classes :
(a) Illuminating lights, the purpose of which is to illuminate the road
ahead for a distance that will make safe driving possible;
* Photometric characteristics are being dealt with bya joint Working Group whichwas appointed jointly bythehternational
Organization for Standardization (Technical Committee ISO/TC 22, Automobiles) and the International Commission
on Illumination (Committee C. I. E./E/3/3/5).
This Working Group met for the first time in Brussels, in 1952, and has been named “Groupe de Travail Bruxelles
1952 (G.T. B.)”.
A small group, called the “Committee of Experts”, is responsible for preparing the work of the G.T.B.
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IS0 / R 303 - 1963 (E)
(b) Signalling lights, the purpose of which is to warn other road users
that the vehicle is on the road, that it is slackening speed or al-
tering its course.
Thus, the lighting devices may be also divided into two classes:
(U) Illumination lamps, e.g. headlamps ;
(b) Signal lamps.
The name of each light is given under clause 1 of the corresponding
section.*
The terms designating the various lights and signals in languages of
those IS0 Member countries which have communicated them are given
in the Multilingual Terminology (Appendix A).
Sometimes, these terms do not refer to the light, but to the lamp or to
the emitting device (e.g. reflex reflector).
Item 2. Symbol
Conventional sign which should be stamped on the knob which con-
trols the light.
item 3. Definition Explains briefly the purpose of the light.
Item 4. Application Compulsory or not.
Item 5. Use Any recommendations regarding circumstances and conditions of use.
Item 6. Type Indications concerning some main characteristics of the device which
shows the light.
In general, every lighting or signalling device comprises three essential
parts, namely :
(1) A light source, which may be combined with an optical system
that directs and distributes the emitted light;
(2) An illuminated area, a transparent or translucent panel through
which the light is emitted from the device;
(3) A housing, a compartment into which the light source and optical
system are fitted.
These parts can be arranged in any one of the following ways:
(a) Separate lamps :
separate illuminated areas,
separate sources of light,
separate housing.
(b) Grouped lamps:
separate illuminated areas,
separate sources of light,
same housing.
(c) Combined lamps :
separate illuminated areas,
same source of light,
same housing.
* The code used to designate the countries is taken from the list of distinguishing signs of vehicles shown in Annex 4
of the Convention of 19 September 1949 on Road Traffic.
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IS0 / R 303 - 1963 (E)
(d) Lamps incorporated with each other:
same illuminated area,
separate sources of light or one single source of light operating
under different conditions,
same housing.
Information under the heading “Type” of a lighting device refers to
characteristics other than those with which the above definitions deal.
Item 7. Tell-tale Some lights require to be fitted with a tell-tale, an optical or an
acoustical signal by means of which the driver is warned whether the
light is on or off.
Item 8. Shape The illuminated area of some lights may have a characteristic geomet-
rical shape.
Item 9. Dimensions Refer to geometrical characteristics of the illuminated area.
\-
Number of similar lights on a vehicle.
Item 10. Number
Conqb iried light
It is possible to consider as one single light two lights of the same colour
emitted by two items of equipment, the projections of whose illuminated
areas onto a vertical plane perpendicular to the longitudinal plane of
symmetry of the vehicle occupy at least 50 per cent of the surface of
the smallest rectangle circumscribed around the projections of the two
illuminated areas mentioned above.
If the light, which is thus considered to be a single light, is an illuminat-
ing light (driving beam, meeting beam, fog light), its light distribution
should be in accordance with the relevant specification.
If the light, which is thus considered to be a single light, is a signalling
light, its photometric characteristics should not exceed the maximum
values laid down by the specification for the single light of the same
denomination, and the photometric characteristics of each of the
constituent lights should not be less than the minimum values laid
down in this same specification.
For the checking of the photometric characteristics of a light considered
to be a single light, although it is emitted by two different items of
equipment, the axis of reference of the combined light should be defined
by the manufacturer of the equipment.
Item 11. Location Place where the light is located on the vehicle.
Item 12. Height above The maximum height above the ground is measured to the highest
the ground point of the illuminated area, and the minimum height, to the lowest
point.
Heights above the ground of illuminating and signalling lamps refer
to the unladen vehicle. *
* In some countries, the regulations apply to a loaded vehicle.
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IS0 / R 303 - 1963 (E)
Item 13. Location as Dimensions defining location in relation to the width of the vehicle.
regards the
width of
the vehicle
Item 14. Orientation
Direction of the luminous beam.
Item 15. Geometrical This is a purely geometrical concept.
visibility
There should be no obstacle capable of obstructing light between the
illuminated area and an observer’s eye located in the space common
to the following two dihedral angles, the apices of which pass through
the centre of the illuminated area:
(a) A dihedral angle whose apex is vertical and whose planes are at
specified minimum angles to the longitudinal plane of symmetry of
the vehicle; the aperture of this dihedral angle is the horizontal
angle of geometrical visibility.
(6) A dihedral angle whose apex is horizontal and whose planes are at
V
specified minimum angles to the horizontal; the aperture of this
dihedral angle is the vertical angle of geometrical visibility. In
general, the bisecting plane of this dihedral angle is horizontal.
The geometrical visibility of a light is thus specified in minimum values
of horizontal and vertical angles of visibility, together with their orient-
ation in relation to the vehicle.
Item 16. Physiological
Indicates the distance from which a light is visible or the distance
Visibility effectively illuminated by it.
Item 17. Photometric Specification which deals with spatial distribution of the luminous flux.
character-
Photometric characteristics of illuminating lights are given in Appen-
istics
dix B.
Colorimetric definition of the light in accordance with the International
Item 18. Colour Commission on Illumination (C. I. E.) trichromatic system.
Colorimetric characteristics of illuminating and signalling lights are
given in Appendix D.
NOTE. - Whenever it is deemed necessary, the above may be extended
and additional clauses inserted.
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IS0 / R 303 - 1963 (E)
I. ILLUMINATING LIGHTS
1. DRIVING BEAM - UPPER BEAM
c
Fig. 15
1.1 Terminology GB Driving beam.
USA Upper beam
1.2 Symbol Not specified.
1.3 Definition Vehicle light intended to illuminate the road over a great distance
ahead of the vehicle.
1.4 Application Compulsory for all vehicles capable of exceeding a speed of 30 km/h
on the level.
1.5 Use To illuminate the road ahead of the vehicle, in circumstances where
the lighting of vehicles is required, in accordance with the regulations
of the country, when no other vehicle (cycles included) is coming
toward it.*
1.6 Type (See item 6 of preliminary section, “ Pian for Study”, page 6.)
1.7 Tell-tale Under study.
1.8 Shape Not specified.
1.9 Dimensions Not specified.
1.10 Number
At least two.
*
A later recommendation of the Groupe de Travail Bruxelles 1952 (G.T.B.) will specify in what conditions it may be
beneficial to use the driving beams by day (in fog, snow fall, rain storms, dust clouds).
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1.11 Location At the front of the vehicle.
1.12 Height above Not specified.
the ground
1.13 Location as Not specified.
regards the width
of the vehicle
1.14 Towards the front.
Orientation
1.15 Geometrical Not needed.
visibility
1.16 Effective illumination of the road for ai least 100 m in front of the
Physiological
visibility vehicle.
1.17 Photometric See Appendix B.
characteristics
1.18 Colour White or selective yellow, according to the regulations of the couii-_y
in which the vehicle is registered.
of a vehicle should be of one and the same colour.
The driving beams
Colorimetric characteristics in accordance with Appendix D.
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2. MEETING BEAM - LOWER BEAM
O O p
2
FIG. 2
GB Meeting beam.
2.1 Terminology
USA Lower beam.
2.2 Symbol Not specified.
Lighting specially designed to ensure safety, when vehicles meet.
2.3 Definition
In the present state of technique: beam illuminating only a specified
limited part of the road, in order to reduce dazzle for an observer ap-
proaching ahead of the vehicle.
2.4 Application Compulsory on all motor vehicles.
To illuminate the road ahead of the vehicle, when meeting or before
2.5 Use
passing other road users and, if necessary, in built-up areas, according
to local practice.
This light may also be used in other circumstances specified by the
regulations of the country concerned (by day in fog, snow fall, rain
storms and dust clouds).
2.6 Type Emitted by a headlamp similar to a type whose photometric charac-
teristics are acceptable under the regulations of the country concerned.
At present, there are two recognized prototypes :
(a) The European type, characterized by an asymmetrical beam with
a sharp cut-off, to suit the right-hand or left-hand rule of the road;
(b) The Anglo-American type, characterized by an asymmetrical beam
with a gradual cut-off, to suit the right-hand or left-hand rule of
the road.
6 of preliminary section, “Plan for Study”, page 6.)
(See also item
2.7 Tell-taie Under study.
2.8 Shape Not specified.
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IS0 / R 303 -1963 (E)
2.9 Dimensions
Not specified.
2.10 Number Two, taking into account thedefinitionof thecombined light(seeitem 10
of preliminary section, “Plan for Study”, page 7).
2.11 Location At the front of the vehicle.
2.12 Height above Recommended minimum height above ground of the lowest part of
the ground the illuminated area: 500 mm.
Recommended maximum height above ground of the highest part of
the illuminated area: 1200 mm (see item 12 of preliminary section,
“Plan for Study”, page 7.)
2.13 Location as The two meeting beams should be symmetrical in relation to the longi-
regards the width tudinal plane of symmetry of the vehicle.
of the vehicle
The farthest point of the illuminated area from the longitudinal plane
of symmetry of the vehicle should be as near as possible to, and in any
case not more than 400 mm from, the extreme maximum width of the
vehicle.
2.14 Orientation Forwards.
2.15 Geometrical Not needed.
visibility
2.16 Physiological
Efficient illumination of the road over a distance of at least 30 min front
of the vehicle.
visibility
2.17 Photometric Specifications for meeting beams are given in Appendix B.
characteristics
These specifications comprise three sections :
(a) American passing beam (SAE Specification),
(b) British meeting beam(S. M. M. and T. Tentative Standard No.59T),
(c) Unified European passing beam.
2.18 Colour
White or selective yellow, according to the regulations of the country
in which the vehicle is registered.
Both meeting beams of a vehicle should be of one and the same colour.
Colorimetric characteristics in accordance with Appendix D.
I
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IS0 / R 303 - 1963 (E)
3. FOG LIGHT - FOG LAMP
400 rnax
t
_I
FIG. 14
GB Fog light.
3.1 Terminology
USA Foglamp.
3.2 Symbol Not specified.
3.3 Definition Vehicle light enabling the road to be effectively illuminated in fog,
snow fall, rain storms or dust clouds.
3.4 Application Optional.
In case of fog, snow fall, rain storms or dust clouds.
3.5 Use
It should be possible to switch it off when meeting another vehicle.
3.6 Type (See item 6 of preliminary section, “Plan for Study”, page 6.)
3.7 Tell-tale Under study.
Not specified.
3.8 Shape
3.9 Dimensions Not specified.
3.10 Number Two.
3.11 Location At the front of the vehicle.
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IS0 / R 303 - 1963 (E)
3.12 Height above Lowest point of the illuminated area: 250 mm minimum.
the ground
No point of the illuminated area of the fog light should lie above the
highest point of the illuminated area of the meeting beam.
The two fog lights should be symmetrical in relation to the longitudinal
3.13 Location as
regards the width plane of symmetry of the vehicle.
of the vehicle
The farthest point of the illuminated area from the longitudinal plane
of symmetry of the vehicle should be as near as possible to, and in any
case not more than 400 mm from, the extreme maximum width of the
vehicle.
3.14 Orientation Towards the front.
3.15 Geometrical Not needed.
visibility
3.16 Physiological Not specified.
visibility
3.17 Photometric Under study.
characteristics
3.18 Colour White or selective yellow.
Both fog lights of a vehicle should be of one and the same colour.
Colorimetric characteristics in accordance with Appendix D.
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IS0 / R 303 - 1963 (E)
IT. SIGNALLING LIGHTS
(a) Lights used by day and by night
4. DIRECTION INDICATOR - TURN SIGNAL LIGHT
Movable arm Side flasher
i
Front built-in flasher Rear built-in flasher
A
600 rnin
-
FIG. 3
4.1 Terminology GB Direction indicator.
USA Turn signal light.
4.2 Symbol Not specified.
4.3 Definition Light used on a vehicle for signalling an intention to change direction
to the right or to the left.
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IS0 / R 303 - 1963 (E)
4.4 Application Compulsory, except for vehicles without coach-work.
4.5 Use To indicate by day and by night the intention to change direction to the
right or to the left.
4.6 Type Two types are available :
(U) Movable arm,
(1) the arm is fixed when operating
and the light is steady,
(2) the arm oscillates when operating
I
(3) the arm is fixed when operating and is fitted with a flashing
light, which complies with the provisions of paragraph (b)
below.
(b) Fixed position with flashing light, frequency 90 30 cycles per
minute.
Operating time-lag: The switching-on of the light should be followed
by the appearance of the light within one second at most and by the
first extinction of the light, within one second and a half at most.
When a flashing rear direction indicator light and a stop light are
emitted through the same illuminated area, the connections should be
so arranged that the stop light cannot be lit, when the flashing light
associated with it is operating.
(See item 6 of preliminary section, “Plan for Study”, page 6.)
Indispensable, if the direction indicator cannot be seen by the driver.
4.7 Teii-tale
The tell-tale should show clearly whether the direction indicator is
operating correctly.
The tell-tale may be optical or acoustic.
Colour recommended for an optical tell-tale : green.
4.8 Shape Not specified.
Length of the movable arm: 150 mm minimum. (The arm should pro-
4.9 Dimensions
ject by this amount beyond the extreme maximum width of the vehicle
at the mounting height of the indicator.)
The equipment of a motor vehicle may consist of one of the following
4.10 Number
arrangements :
(a) Two side indicators;
(b) Two front-and-side indicators,
Two rear indicators;
(c) Two front indicators,
Two side indicators,
Two rear indicators;
(d) Two front indicators,
Two rear indicators.
The equipment of a trailer consists of:
(e) Two rear indicators.
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IS0 / R 303 - 1963 (E)
Whatever combination of equipment is adopted for a motor vehicle
or a trailer, there should be one indicator of each type used on each
side of the vehicle.
Movable arm indicators are located only on the sides of the vehicle.
4.11 Location
Flashing indicators are located at the front, at the rear and on the sides
of the vehicle.
Any direction indicator should be so located that the light emitted
by it complies with the geometrical visibility requirements stated in
clause 4.15 below.
4.12 Height above Lowest point of the illuminated area :
the ground
500 mm minimum for movable-arm indicators and side flashing indi-
cators,
400 m minimum for other flashing indicators (front and rear).
Highest point of the illuminated area:
1900 mm maximum for all kinds of direction indicators.
(If the construction of the vehicle demands it, the maximum height may
in exceptional cases be increased to 2100 mm.)
4.13 Location as The illuminated areas should be symmetrical in relation to the longi-
regards the width tudinal plan of symmetry of the vehicle. The maximum distance from
of the vehicle the extreme outside edge of the vehicle to the outside edge of an
illuminated area should not exceed 400 mm. Where this is not possible,
the direction indicators should be placed as near as possible to the
outside edge of the vehicle. Minimum spacing between the inner edges
of the two illuminated areas: 600 mm.
It is suggested that the distance between the edges of the illuminated
areas of a front direction indicator and the nearest meeting projector
should be not less than 75 mm.
Depends on the combination of equipment adopted for the vehicle (see
4.14 Orientation
clause 4.10 above and clause 4.15 below).
4.15 Geometrical See Figure 4, page 18.
visibility
Horizontal angles of geometrical visibility.
Minimum values of horizontal angles of geometrical visibility are
shown on Figure 4.
These provisions are applicable to articulated vehicles.
Vertical angle of geometrical visibility.
For aii types of direction indicators:
15" above
the horizontal.
30" {
15" below
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IS0 / R 303 - 1963 (E)
The figure of lo", given for the
rearward dead angle of visibil-
ity of the side indicator, is the
maximum value.
Dimension d should be not
more than one-third of the
overall length of the vehicle.
d is the distance between the
illuminated area of the side in-
dicator and the forward ex-
tremity of the overall length of
the vehicle.
This type is suitable only for
vehicles in which the distance
between the illuminated areas
of the front and rear direction
indicators is less than 6 m.
6 rn rnox. -
4.16 Physiological Visible at 30 m in sunshine and at 300 m at night in clear weather.
visibility
Should not be dazzling at night for other road users.
4.17 Photometric Under study.
characteristics
4.18 Colour Towards the front: white or, preferably, amber.
Towards the rear: red or, preferably, amber.
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IS0 / R 303 - 1963 (E)
5. STOP LIGHT - STOP LAMP
FIG. 5
5.1 Terminology GB Stop light.
USA Stop lamp.
5.2 Symbol Not needed.
5.3 Definition Brake-operated signalling rear light on a vehicle, intended to give
warning of the slowing down or the stopping of the vehicle.
5.4 Application Compulsory for all vehicles capable of exceeding a speed of 20 km/h on
the level.
5.5 Use To indicate by day and by night, for the benefit of all road users con-
cerned, that the vehicle is slowing down or stopping under the action
of the service brakes.
5.6 Type Should in no case be a flashing light.
6 of preliminary section, “Plan for Study”, page 6).
(See also item
Nevertheless, a flashing light indicating a change of direction may ,e
substituted for the stop light located on the side to which the turn is
being made, for the duration of the turn. In practice, when a rear
flashing direction indicator light and a stop light are emitted through
one and the same illuminated area, the connections are so arranged
that the stop light cannot be lit when the flashing light associated with
it is operating.
5.7 Tell-tale Under study.
5.8 Shape
Not specified.
5.9 Dimensions Not specified.
5.10 Number Two (taking into account the defuiition of thecombinedlight, see item 10
of preliminary section, “Plan for study”, page 7).
5.11 Location At the rear of the vehicle.
5.12 Height above Lowest point of the illuminated area: 400 mm minimum.
the ground Highest point of the illuminated area: 1900 mm maximum.
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IS0 / R 303- 1- (E)
5.13 Location as The two stop lights should be symmetrical in relation to the longitudinal
regards the width plane of symmetry of the vehicle.
of the vehicle
5.14 Orientation Towards the rear.
5.15 Geometrical
Visibility
1
FIG. 6
Horizontal angle of geometrical visibility :
45" outwards,
900{ 45" inwards.
Vertical angle of geometrical visibility:
15" above the horizontal.
30" { 15" below}
Visible at 30 m in sunshine and at 300 m at night in clear weather.
5.16 Physiological
visibility
Should not be dazzling at night for other road users.
5.17 Photometric Under study. *
characteristics
When the stop signal is provided by intensifying the red tail light, the
ratio of intensity necessary for avoiding any confusion between these
f
two lights wili be defined.
5.18 Colour Red or amber.*
Colorimetric characteristics in accordance with Appendix D.
* Determination of the photometric characteristics will show whether a choice should be made between the colours
proposed.
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IS0 / R 303 - 19w (E)
(b) Lights used generally by night
6. REAR NUMBER PLATE LIGHT - REAR LICENCE PLATE LAMP
FIG. 1
6.1 Terminology GB Rear number plate light.
USA Rear licence plate lamp.
6.2 Symbol
Not needed.
6.3 Definition Light intended to illuminate the rear number plate.
6.4 Application Compulsory.
6.5 Use To illuminate the rear number plate in all circumstances where lighting
of vehicles is required.
6.6 Type (See item 6 of preliminary section, “Plan for Study”, page 6.)
6.7 Teli-tale
Not needed.
6.8 Shape Not specified.
6.9 Dimensions Not specified.
6.10 Number Not specified.
6.11 Location At the rear of the vehicle.
6.12 Height above Depends upon the location of the number plate.
the ground
6.13 Location as Depends upon the location of the number plate.
regards the width
of the vehicle
6.14 Orientation The light source should not normally be visible from the rear.
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IS0 / R 303 - 1963 (E)
6.15 Geometrical Not needed.
visibility
6.16 Physiological Number readable at 20 m by night in clear weather.
visibility
6.17 Photometric Under study.
characteristics
6.18 Colour White.
Colorimetric characteristics in accordance with Appendix D.
NOTE. - It is recommended that the number plate should have ade-
quate contrast between the background and the symbols (light
coloured symbols on a dark ground or vice versa), avoiding
any specular effect.
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I
IS0 / R 303 - 1963 (E)
7. 7. SIDE SIDE LIGHT LIGHT - - PARKING PARKING LAMP LAMP
FIG. 7
7.1 Terminology GB Side light.
USA Parking lamp, side light.
Not specified.
7.2 Symbol
7.3 Definition Light emitted by a lighting device, indicating the presence of a vehicle
when seen from in front, and intended to show the width of the vehicle.
Compulsory.
7.4 Application
To indicate the front of the vehicle in circumstances where the lighting
7.5 Use
of vehicles is required, while it is stationary or in all cases where the
use of meeting lights is not permitted.
The side lights may be incorporated with other front lights, subject to
7.6 Type
the provisions of clauses 7.12 and 7.13 below.
(See item 6 of preliminary section, “Plan for Study”, page 6.)
7.7 Teii-tale No provision made.
Not specified.
7.8 S
...