prEN 12368
(Main)Traffic control equipment - Signal heads
Traffic control equipment - Signal heads
This document applies to signal heads with one or more signal lights of the colours red, yellow and/or green signal lights for road traffic with 200 mm and 300 mm roundels and to optical units to be integrated in signal heads to produce the individual signal lights. It defines the product characteristics for the visual, structural, environmental performances and testing of signal heads and optical units for pedestrian and road traffic use, and the rules for the evaluation of the conformity of these products.
This document can be partly or fully applied on a voluntary basis to other signal heads outside of the scope specified above like for instance white optical units or small signal heads with a diameter smaller than 200 mm.
Anlagen zur Verkehrssteuerung - Signalleuchten
Dieses Dokument gilt für Signalleuchten mit einem oder mehreren Signallichtern in den Farben Rot, Gelb und/oder Grün für den Straßenverkehr mit 200 mm und 300 mm Leuchtfelddurchmesser sowie für Signalgeber, die zur Erzeugung der einzelnen Signallichter in Signalleuchten eingebaut werden. Es werden Produkteigenschaften für Sichtbarkeit, Konstruktion, Umweltverträglichkeit sowie die Prüfverfahren für Signalleuchten und Signalgeber für Anlagen im Fußgänger und Straßenverkehrsbereich sowie die Regeln zur Bewertung der Konformität dieser Produkte festgelegt.
Dieses Dokument kann auf freiwilliger Basis ganz oder teilweise auf andere Signalleuchten außerhalb des oben festgelegten Anwendungsbereichs, wie zum Beispiel weiße Signalgeber oder kleine Signalleuchten mit einem Durchmesser unter 200 mm, angewendet werden.
Équipement de régulation du trafic - Signaux
Le présent document s’applique aux signaux de circulation qui ont une ou plusieurs unités optiques lumineuses de couleur rouge, jaune et/ou verte pour la régulation du trafic, de diamètre 200 mm et 300 mm, ainsi qu’aux unités optiques qui équipent les signaux. Il définit les exigences de performance visuelle, structurelle et de tenue de l’environnement et les essais des signaux et des unités optiques utilisés pour la circulation des piétons et le trafic routier, ainsi que les règles d’attribution de la conformité de ces produits.
Ce document peut être appliqué dans sa totalité ou en partie, de manière volontaire, à d’autres signaux n’entrant pas dans le domaine d’application spécifié ci-dessus, par exemple pour les unités optiques blanches ou les signaux de petites dimensions dont le diamètre est inférieur à 200 mm.
Oprema za nadzor in vodenje cestnega prometa - Signalne luči
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 12368:2019
01-marec-2019
2SUHPD]DQDG]RULQYRGHQMHFHVWQHJDSURPHWD6LJQDOQHOXþL
Traffic control equipment - Signal heads
Anlagen zur Verkehrssteuerung - Signalleuchten
Équipement de régulation du trafic - Signaux
Ta slovenski standard je istoveten z: prEN 12368
ICS:
93.080.30 Cestna oprema in pomožne Road equipment and
naprave installations
oSIST prEN 12368:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 12368:2019
DRAFT
EUROPEAN STANDARD
prEN 12368
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2019
ICS 93.080.30 Will supersede EN 12368:2015
English Version
Traffic control equipment - Signal heads
Équipement de régulation du trafic - Signaux Anlagen zur Verkehrssteuerung - Signalleuchten
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 226.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12368:2019 E
worldwide for CEN national Members.
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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 . 9
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
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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 . 32
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
Annex ZA (informative) Relationship of this European Standard with Regulation (EU) No.305/2011
. 36
Bibliography . 39
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European foreword
This document (prEN 12368:2019) has been prepared by Technical Committee CEN/TC 226 “Road equipment”,
the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12368:2015.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
The main changes in this revision prEN 12368:2019 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.
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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 European standard does not require limits for the recognition of red or green signals with reduced
luminous intensities operating in a failure mode. These limits depend on the surrounding lights (on or off) and
on the situation. However, for a simple rule a red signal should be considered as failed if the luminous intensity
in the reference axes is I ≤ 10 cd, and a green signal should be considered as being in operation if the luminous
intensity is I ≥ 0,05 cd.
The working environment for signal heads is relatively harsh and equipment that is deemed “fit for purpose” is
expected to last in this exposed, corrosive environment for a minimum of 10 years. It is essential that all
materials and manufacturing processes take this into account. The supplier should detail all steps taken to
comply with this clause.
The optical performance of signal heads in use is a function of lens soiling, mirror soiling and a decrease of
luminous flux from the lamp. To maintain the performance of the signal heads during their lifetime, it is
important to ensure that after lamp replacement and cleaning of lens and mirror the light output is restored to
as near 100 % as possible and never lower than 80 % of the declared specified performance.
For devices randomly selected from series production it is important that the product characteristic as to
minimum luminous intensity of the light emitted, are in each relevant direction, of the minimum values
prescribed.
For a full applicability of this European standard the national standardization/regulatory bodies are requested
to define the set of classes relevant for their national requirements.
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1 Scope
This document applies to signal heads with one or more signal lights of the colours red, yellow and/or green
signal lights for road traffic with 200 mm and 300 mm roundels and to optical units to be integrated in signal
heads to produce the individual signal lights. It defines the product characteristics for the visual, structural,
environmental performances and testing of signal heads and optical units for pedestrian and road traffic use,
and the rules for the evaluation of the conformity of these products.
This document can be partly or fully applied on a voluntary basis to other signal heads outside of the scope
specified above like for instance white optical units or small signal heads with a diameter smaller than 200 mm.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references, the
latest edition of the referenced document (including any amendments) applies.
EN 50293, Road traffic signal systems — Electromagnetic compatibility
EN 50556, Road traffic signal systems
EN 60068-2-1, Environmental testing — Part 2-1: Tests — Test A: Cold (IEC 60068-2-1)
EN 60068-2-2, Environmental testing — Part 2-2: Tests — Test B: Dry heat (IEC 60068-2-2)
EN 60068-2-5, Environmental testing — Part 2-5: Tests — Test Sa: Simulated solar radiation at ground level and
guidance for solar radiation testing (IEC 60068-2-5)
EN 60068-2-14, Environmental testing — Part 2-14: Tests — Test N: Change of temperature (IEC 60068-2-14)
EN 60068-2-30, Environmental testing — Part 2-30: Tests — Test Db: Damp heat, cyclic (12 h + 12 h cycle) (IEC
60068-2-30)
EN 60068-2-64, Environmental testing — Part 2-64: Tests — Test Fh: Vibration, broadband random and
guidance (IEC 60068-2-64)
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)
EN 60598-1:2015, Luminaires — Part 1: General requirements and tests (IEC 60598-1)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
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3.1
signal head
device which comprises one or more optical units, including the housing(s), together with all the mounting
brackets, fixings, hoods, visors, cowls and background screens, whose task is to convey a visual message to
vehicle and pedestrian traffic
3.2
optical unit
assembly of components designed to produce a light of the specified nominal size, colour, luminous intensity
and shape
3.3
optical surface
surface of the optical unit which emits light
Note 1 to entry: In many cases it is the external surface of the lens.
3.4
lens
light transmitting element of the optical unit which distributes the luminous flux from the light source into
preferred directions of the signal light
3.5
background screen
opaque board placed around the optical unit, either incorporated in the housing of the optical unit or
detachable, intended to increase the contrast and to enhance visibility
3.6
hood (visor, cowl)
device located above the front of an optical unit to reduce phantom effect or to restrict the field of view
3.7
phantom signal
false signal that is created by sunlight striking an optical unit
Note 1 to entry: For the technologies that don’t use coloured filters, the light reflexion doen’t induce a coloured image,
but decreases the visibility of the signal because of the contrat loss.
3.8
reference axis
axis specified by the supplier, used for environmental and optical tests. If not specified by the manufacture it
will be taken as perpendicular to the centre of the optical surface. The reference axis is labelled as 0° / 0°
3.9
Factory Production Control (FPC)
permanent internal control of production exercised by the manufacturer
3.10
batch
quantity of a product manufactured with no change in raw material, equipment, settings or operation as
defined in the FPC system manual of the manufacturer
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3.11
individual (and non-series)
product manufactured under a manufacturing process that is specifically conceived for one unique production
3.12
apparent luminous surface
projection of the optical surface on a plane perpendicular to the reference axis used for the luminance
uniformity and the phantom signal measurements
4 Constructional product characteristics
4.1 General
The manufacturer shall ensure the design is such that there is a facility for maintenance. Any component
requiring replacement shall be designed such that this is easily accommodated and does not affect the optical
performance of the signal head.
The construction and choice of materials shall be such that they will provide declared performance for a
reasonable economic lifetime of the product as verified by the relevant tests given in this European standard.
The supplier shall detail in his documentation what maintenance shall be carried out, including cleaning
methods and materials, to ensure that the optical performance shall be maintained to at least 80 % of the
minimum values set out in the appropriate parts of 6.3 and 6.4 during the lifetime as defined by the supplier.
During the declared lifetime of the optical unit the colours shall remain within the colour boxes of Table 7.
4.2 Ingress protection
There are 5 classes for the Index Protection, IP, rating in accordance with EN 60529 of a signal head:
— Class I: IP34;
— Class II: IP44;
— Class III: IP54;
— Class IV: IP55;
— Class V: IP65.
NOTE A level of sealing in accordance with IP65 can result in a risk of water collection within the optic housing due to
condensation.
Where separate protection of the optical units is required they shall be protected to IP55 or IP65. The signal
head, including its optical components, shall be so designed that after installation, during its lifetime as defined
by the supplier, including any replacement of components, the optical and mechanical product characteristics
are guaranteed to meet the requirements of this standard.
4.3 Performance under impact product characteristic
There are 3 classes of performance under impact, IR1, IR2 and IR3. When required by the regulatory authority
this characteristic shall be determined in accordance with Clause 7 Constructional and environmental test
methods Table 8 — Impact resistance.
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4.4 Constructional integrity product characteristic
The product is expected to survive levels of vibration that may be expected in normal operation. This
characteristic shall be determined in accordance with Clause 7 Constructional and environmental test methods
Table 9 — Constructional integrity.
5 Environmental, electromagnetic compatibility (EMC) and electrical product
characteristics
5.1 Environmental characteristics
The signal heads shall comply with one or more of the following classes of operational temperature ranges:
— Class A +60 °C to –15 °C;
— Class B +55 °C to –25 °C;
— Class C +40 °C to –40 °C.
5.2 Electrical safety, road traffic safety and EMC characteristics
The signal heads shall comply with the requirements of EN 50293.
Whilst this specification is for a traffic signal product, it is clear that this product is connected to a “Traffic
system” and as such the connections/wiring, etc. that is required between it and any controller shall meet the
requirements of EN 50556 for electrical safety and in particular attention is drawn to 5.1 Electric safety and to
5.2 road traffic safety.
6 Optical product characteristics
6.1 General
The optical units of a signal head should normally be of the same classes regarding luminous intensity,
dimming, distribution of luminous intensity and phantom light, but it is permissible in special cases that the
classes are different.
EXAMPLE In signal head with red, yellow and green optical units, it can be required that the red be in a brighter class
than the yellow and green on high speed roads.
All values in this section refer to the stabilized values according to 8.2.
6.2 Light emitting diameter of optical units
Optical units for road traffic conditions which fall in the scope of this standard shall be circular and have a
nominal light emitting diameter of 200 mm or 300 mm ± 10 %. Local requirements could exist in order to state
which signal head to use. When no regulation exists, it is not feasible to give strict rules for the situations where
either 200 mm or 300 mm optical unit signals should be used, as the requirements for visibility depend on the
local conditions of road lay-out and infrastructure, on traffic conditions and light conditions.
6.3 Luminous intensities of optical units
The performance levels for signal lights, for both 200 mm and 300 mm optical units, shall be as specified in
Table 1.
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Table 1 — Luminous intensities (I) for red, yellow and green signal lights in the reference axis
Performance level 1 2 3
I 100 cd 200 cd 400 cd
min
I class 0 200 cd 400 cd 600 cd
max
I class 1 400 cd 800 cd 1 000 cd
max
I class 2 1 100 cd 2 000 cd 2 500 cd
max
For example the performance level 2/1 is the designation of an optical light with: I = 200 cd; I = 800 cd.
min max
Dimmed operation is an operating mode of the road traffic signal system in which the luminous intensity of the
signal heads is reduced. These classes of dimmed operation are available:
— Class D0 Dimmed operation is not required;
— Class D1 As declared by the manufacturer.
For Class D1, the manufacturer shall declare the performance of their signal in dimmed operation against the
optical product characteristics of this specification and operational voltage ranges.
NOTE Refer to CLC/TS 50509:2007, Annex B regarding dimmed operation in the Netherlands and Annex C regarding
dimmed operation in Spain.
6.4 Distribution of luminous intensity
In Tables 2, 3, 4 and 5 four angular distributions of luminous intensity for optical units are specified as
minimum luminous intensities, expressed as percentage values dependent on the choice of the following
categories:
— A as a percentage of the measured values on the reference axis;
— B as a percentage of the minimum values as defined in Table 1 required on the on the the reference axis.
Outside the area described in Tables 2 to 5 (as applicable) the luminous intensities shall not exceed the
maximum of the relevant class of performance level.
Only the listed combinations of classes and performance levels shall be applied.
Within the field of measurement, the light pattern shall be substantially uniform, i.e. the light intensity in each
direction at each test point shall meet at least the level achieved by the next consecutive measurement. e.g. if
the measurement in the reference axis is 100 % and at +5 the measurement is 85 % then in between the two a
measurement should be at least 85 %.
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Table 2 — Extra wide-optical unit (Type E) possible combinations B 1/0, B 1/1, B 2/2
α 0° ±2,5° ±5° ±10° ±15° ±20° ±30°
horiz
α
vert
0° 100 – 85 80 – 60 40
–1,5° – – – – – – –
–3° 80 – 75 – – – –
–5° 60 – – 45 – – –
–10° 50 – – – – 20 –
–20° 20 – – – – – 10
– means no specific values are required
Table 3 — Wide optical unit (Type W) possible combinations A 1/0, A 1/1; A 2/0, A 2/1; A 3/0, A 3/1;
B 1/2; B 2/1,B 2/2; B 3/2
α 0° ±2,5° ±5° ±10° ±15° ±20° ±30°
horiz
α
vert
0° 100 – 85 55 – 3 1
–1,5° – – – – – – –
–3° 80 – 75 – – – –
–5° 60 – – 35 – – –
–10° 30 – – – – 8 –
–20° 2 – – – – – 2
– means no specific values are required
Table 4 — Medium wide optical unit (Type M) possible combinations A 2/0, A 2/1; A 3/0, A 3/1; A 2/2;
A 3/2
α 0° ±2,5° ±5° ±10° ±15° ±20° ±30°
horiz
α
vert
0° 100 – 75 40 10 1 *
–1,5° – – – – – – *
–3° 75 – 60 – – – *
–5° 50 – – 20 – – *
–10° 12,5 – – – – 6 *
–20° 1,5 – – – – – 1
– means no specific values are required
* means no requirements
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Table 5 — Narrow optical unit (Type N) possible combinations A 2/0, A 2/1; A 3/0, A 3/1; B 2/2; B 3/2
α 0° ±2,5° ±5° ±10° ±15° ±20° ±30°
horiz
α
vert
0° 100 75 65 15 1,5 * *
–1,5° 95 90 – – – * *
–3° 70 – 45 – – * *
–5° 40 – – 10 – * *
–10° 6 – – – 5 * *
–20° * * * * * * *
– means no specific values are required
* means no requirements
6.5 Luminance uniformity
The luminance uniformity of the optical unit as the ratio of the lowest and greatest luminance L : L shall
min max
be ≥ 1 : 10 for types E, W and M and ≥ 1 : 15 for type N.
6.6 Maximum phantom signal
For each signal colour the maximum phantom signal I for light incident at an angle of 10° to the reference axis
ph
shall comply with of Table 6, where I is the actual measured luminous intensity I of the signal light:
s
Table 6 — Requirement for the ratio of I to I
s ph
Signal lig
...
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