EN 12368:2024

SLOVENSKI STANDARD
01-julij-2024
Nadomešča:
SIST EN 12368:2015
Oprema za nadzor in vodenje cestnega prometa - Signalne luči
Traffic control equipment - Signal heads
Anlagen zur Verkehrssteuerung - Signalleuchten
Équipement de régulation du trafic - Signaux
Ta slovenski standard je istoveten z: EN 12368:2024
ICS:
93.080.30 Cestna oprema in pomožne Road equipment and
naprave installations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12368
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2024
EUROPÄISCHE NORM
ICS 93.080.30 Supersedes EN 12368:2015
English Version
Traffic control equipment - Signal heads
Équipement de régulation du trafic - Signaux Anlagen zur Verkehrssteuerung - Signalleuchten
This European Standard was approved by CEN on 29 January 2024.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12368:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Constructional product characteristics . 8
4.1 General . 8
4.2 Ingress protection . 8
4.3 Performance under impact product characteristic . 8
4.4 Constructional integrity product characteristic . 8
5 Environmental, electromagnetic compatibility (EMC) and electrical product characteristics
................................................................................................................................................................................ 9
5.1 Environmental characteristics . 9
5.2 Electrical safety, road traffic safety and EMC characteristics . 9
6 Optical product characteristics . 9
6.1 General . 9
6.2 Light emitting diameter of optical units . 9
6.3 Luminous intensities of optical units . 9
6.4 Distribution of luminous intensity . 10
6.5 Luminance uniformity . 12
6.6 Maximum phantom signal. 12
6.7 Colours of light . 12
6.8 Signal lights with symbols . 13
6.9 Background screen of signal lights . 13
6.10 Visible flicker . 13
7 Constructional and environmental test methods . 13
8 Optical test methods . 16
8.1 General . 16
8.2 Measurement of luminous intensities . 17
8.3 Measurement of luminance for uniformity tests . 18
8.4 Measurement of phantom signal . 18
8.5 Measurement of the colour . 19
8.6 Measurement of combined colours . 20
9 Tolerances . 21
10 Marking, labelling and product information. 21
10.1 Marking and labelling . 21
10.2 Product information . 22
11 Assessment and verification of constancy of performance - AVCP . 23
11.1 General . 23
11.2 Type testing . 23
11.2.1 General . 23
11.2.2 Test samples, testing and compliance criteria . 24
11.2.3 Test reports . 26
11.2.4 Shared other party results . 26
11.2.5 Cascading determination of the product-type results . 27
11.3 Factory production control (FPC) . 28
11.3.1 General . 28
11.3.2 Requirements . 28
11.3.3 Product specific requirements . 31
11.3.4 Initial inspection of factory and of FPC . 32
11.3.5 Continuous surveillance of FPC . 32
11.3.6 Procedure for modifications . 33
11.3.7 One-off products, pre-production products (e.g. prototypes) and products produced in very
low quantity . 33
Annex A (informative) Test, declarations and requirements . 34
Bibliography . 36

European foreword
This document (EN 12368:2024) has been prepared by Technical Committee CEN/TC 226 “Road equipment”,
the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by October 2024, and conflicting national standards shall be withdrawn at the
latest by January 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12368:2015.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association.
The main changes in this revision EN 12368:2024 compared to the previous edition EN 12368:2015 are as
follows:
a) editorial changes for enhanced clarity and consistency;
b) change of the scope to include volunteerly application of this standard to other types of signal heads;
c) clarification of the terms optical surface and reference axis;
d) change of the headline of 4.2 to better match the content;
e) part of the content of 6.3 and 6.4 was moved to 8.2;
f) the explanatory notes in 6.6 referred to the obsolete incandescent lamp technology and were changed based
on the current LED technology;
g) change in the wording of 6.8 for better technical clarification;
h) change in the testing method regarding the stabilization of the luminous intensity in 8.2;
i) added the address as an information which is required to be on the product label.
Any feedback and questions on this document should be directed to the users’ national standards body. A
complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia,
Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United Kingdom.
Introduction
Signal heads are mainly used to transfer safety messages to the road user to achieve specific reactions. Signal
heads in road traffic transfer this information optically by signal lights which have a specific meaning and which
differ in their colour of light and in the design of their illuminating surface.
The visibility of a signal light depends on the colour, luminous intensity, luminous intensity distribution,
luminance and luminance uniformity, the surrounding luminance (background luminance), the size of the
illuminating area, the phantom light and the distance and angle between observer and signal head.
Four angular distributions of luminous intensities for signal lights are specified. The user can choose between an
extra wide, wide, medium and narrow beam signal to obtain a good recognition of the signal for short distances
in urban areas, for long distances in rural areas. To achieve a good performance the standard provides a number
of different performance levels and two different diameters for the optical units.
This document does not require limits for the recognition of red or green signals with reduced luminous
i
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