SIST EN 12675:2017
(Main)Traffic signal controllers - Functional safety requirements
Traffic signal controllers - Functional safety requirements
This European Standard specifies the functional safety requirements for traffic signal controllers. It is applicable to traffic signal control equipment permanent¬ly and temporarily installed, but excludes portable traffic control equip¬ment. Traffic signal controllers, as defined by this European Standard, are required to control conflicting traffic, both vehicular and pedestrian, e.g. junction signals, pedestrian crossings, shuttle signals, public transport signals, in a safe manner.
The electrical safety requirements and additional traffic safety requirements, the interfacing with external equip¬ment and the test methods for verifying compliance with this European Standard are contained in HD 638.
NOTE National requirements may specify special conditions for public transport signals (PT) and for any other signal that is not specified in a European Standard.
Steuergeräte für Lichtsignalanlagen - Funktionale Sicherheitsanforderungen
Diese Europäische Norm legt die funktionalen Sicherheitsanforderungen an die Steuergeräte für Straßenverkehrs-Signalanlagen fest. Sie ist auf fest und vorübergehend errichtete Steuergeräte für Straßenverkehrs-Signalanlagen und auf ortsveränderliche Anlagen zur Verkehrssteuerung anwendbar; ausgenommen sind ortsveränderliche Signalanlagen zur Verkehrssteuerung, die nur wechselseitige (alternierende) Fahrspuren/Fahrspuren an Engstellen (wie nachstehend in 3.37 definiert) ohne die Regelung querender Fahrzeug- oder Fußgängerbewegungen steuern. Steuergeräte für Straßenverkehrs-Signalanlagen, die durch diese Europäische Norm festgelegt sind, sind zur sicheren Steuerung des unverträglichen Straßenverkehrs durch Fahrzeuge und Fußgänger erforderlich, z. B. Kreuzungssignalisierungen, Fußgängerüberwege, Engstellen-Signalisierungen, Signalisierungen für den öffentlichen Personenverkehr.
Die elektrischen Sicherheitsanforderungen und zusätzlichen Verkehrssicherheitsanforderungen, die Schnittstellen mit externen Geräten sowie die Prüfverfahren zum Nachweis der Übereinstimmung mit dieser Europäischen Norm sind in EN 50556 enthalten.
Für eine vollständige Anwendbarkeit dieser Europäischen Norm sowie auch von EN 50556, werden die nationalen Normungsorganisationen gebeten, die Auswahl der Klassen festzulegen, die für ihre nationalen Anforderungen relevant sind.
ANMERKUNG Nationale Anforderungen können die besonderen Bedingungen für Signale der öffentlichen Verkehrsmittel und für jedes andere Signal festlegen, das nicht in einer Europäischen Norm festgelegt ist.
Contrôleurs de feux d'intersection - Prescription de sécurité fonctionnelle
La présente Norme européenne spécifie les exigences de sécurité fonctionnelle pour les contrôleurs de
signaux de circulation routière. Elle est applicable aux équipements de commande des signaux de circulation
routière installés à titre permanent et provisoire, ainsi qu'aux équipements de commande des signaux de
circulation routière portables, à l'exception de ceux qui peuvent uniquement commander des voies à
circulation alternée (telles que définies ci-après en 3.37), et qui ne gèrent pas d’intersection avec des courants
de véhicules ou de piétons. Les contrôleurs de signaux de circulation routière définis dans la présente Norme
européenne doivent gérer en toute sécurité les courants de circulation antagonistes de véhicules et de
piétons, par exemple aux carrefours, aux passages pour piétons, dans les zones de circulation alternée ou de
circulation de véhicules de transport en commun.
Les exigences de sécurité électrique, les exigences supplémentaires de sécurité de la circulation, l'interfaçage
avec les équipements extérieurs et les méthodes d'essais destinées à vérifier la conformité avec la présente
Norme européenne figurent dans la norme EN 50556.
Pour une applicabilité totale de la présente Norme européenne tout comme de la norme EN 50556, les
organismes de normalisation des différents pays doivent définir l'ensemble des classes pertinentes pour leurs
exigences nationales.
NOTE Des exigences nationales peuvent spécifier des conditions particulières pour les signaux destinés aux
véhicules de transport en commun et pour tout autre signal ne faisant pas l'objet d'une Norme européenne.
Krmilniki za svetlobne prometne znake - Funkcionalne varnostne zahteve
Ta evropski standard določa funkcionalne varnostne zahteve za krmilnike za svetlobne prometne znake. Uporablja se za trajno in začasno nameščeno opremo za nadzor prometa, vendar pa ne zajema prenosne opreme za nadzor prometa. Krmilniki za svetlobne prometne znake, kot jih opredeljuje ta evropski standard, so potrebni za nadzor konfliktnega prometa tako vozil kot pešcev, npr. signalizacija v križiščih, prehodi za pešce, signalizacija na zoženjih, signalizacija za javni prevoz, na varen način.
Električne varnostne zahteve in dodatne zahteve glede prometne varnosti, povezovanje z zunanjo opremo in preskusne metode za preverjanje skladnosti s tem evropskim standardom so zajete v standardu HD 638.
OPOMBA Nacionalne zahteve lahko določajo posebne pogoje za signalizacijo za javni prevoz (PT) in za katero koli drugo signalizacijo, ki ni določena v evropskem standardu.
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Krmilniki za svetlobne prometne znake - Funkcionalne varnostne zahteveSteuergeräte für Lichtsignalanlagen - Funktionale SicherheitsanforderungenContrôleurs de feux d'intersection - Prescription de sécurité fonctionnelleTraffic signal controllers - Functional safety requirements93.080.30Cestna oprema in pomožne napraveRoad equipment and installationsICS:Ta slovenski standard je istoveten z:EN 12675:2017SIST EN 12675:2017en,fr,de01-oktober-2017SIST EN 12675:2017SLOVENSKI
STANDARDSIST EN 12675:20021DGRPHãþD
SIST EN 12675:2017
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12675
August
t r s y ICS
{ uä r z rä u r Supersedes EN
s t x y wã t r r rEnglish Version
Traffic signal controllers æ Functional safety requirementsContrôleurs de signaux de circulation routière æ Exigences de sécurité fonctionnelle
Steuergeräte für Lichtsignalanlagen æ Funktionale Sicherheitsanforderungen This European Standard was approved by CEN on
s { June
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s t x y wã t r s y ESIST EN 12675:2017
EN 12675:2017 (E) 2 Contents Page European foreword . 3 Introduction . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Functional safety requirements . 10 4.1 General . 10 4.2 Application of power . 11 4.3 Diagnostic checks of traffic signal controller logic system . 11 4.4 Classification of faults . 11 4.5 Conflict faults . 12 4.5.1 Signal group conflicts (unwanted signals) . 12 4.5.2 Signal group green/absent red conflict. 12 4.5.3 Absent red/absent red conflicts . 13 4.6 National signal regulations (unwanted signals) . 13 4.7 Absent signals . 14 4.7.1 Absent signal group red signals . 14 4.7.2 Absent signal groups, yellow or green signals . 15 4.8 Compliance checking . 15 4.9 Safety timings . 15 4.10 National signal sequences . 16 4.11 Faults of external inputs . 16 5 Fault condition . 17 5.1 General . 17 5.2 Major faults . 17 5.3 Minor faults . 17 5.4 Storage of faults . 17 6 User documentation . 18 7 Marking and labelling . 18 Annex A (informative)
A-deviations . 19 Bibliography . 21
SIST EN 12675:2017
EN 12675:2017 (E) 3 European foreword This document (EN 12675:2017) 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 February 2018, and conflicting national standards shall be withdrawn at the latest by February 2018. 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 12675:2000. The main changes in this revision are as follows: a) Clause 1, Scope: deleted the restriction of scope for portable traffic signal control equipment; b) Clause 1, Scope: clarified the handling of classes on national level; c) Clause 2, Update of references to standard EN 50556; d) 3.9: deleted the restriction of manual operation mode to an operator; e) 3.12: renamed and reordered the operation modes of a traffic signal controller; f) 3.29: invented the definition for time base frequency; g) 3.32: extended the definition of traffic signal controller by the function of monitoring; h) 3.34: invented the definition of traffic signal controller logic; i) 4.2: generalized the requirement on power up self-test; j) 4.3: generalized the requirement on continuous diagnostic checks; k) 4.7.1 Class CB1: deleted the restriction to vehicular signal groups; l) 4.9: clarified the requirements to safety relevant timings; m) 5.2: deleted the requirement for ongoing operation of master clock and maintenance facilities in the case of a major fault; n) 5.4: renumbered and corrected the list of faults necessary to be recorded; o) 6: restricted necessary user documentation to needs for safe operation and service; p) 6 f): replaced means of programming by tools; SIST EN 12675:2017
EN 12675:2017 (E) 4 q) 7. Reformulated the requirements for marking and labelling more general, to cover also onsite reprogrammable memory; r) Annex A: deleted deviations on National Regulations for Netherlands; s) Some corrections in orthography and grammar. 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, 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 the United Kingdom. SIST EN 12675:2017
EN 12675:2017 (E) 5 Introduction The objective of this European Standard is to specify the functional safety requirements of equipment used for the control of traffic signals. It relates to the control of signals to traffic, and any associated signalled traffic movements. The primary concern is to safeguard persons and objects against hazards due to conflicting signals to traffic. The hazards to be considered include, but are not limited to, the following types of possible signal failures: a) the failure to display a red signal to traffic; b) the display of a green signal to conflicting traffic; c) the failure to display the correct signal sequence to traffic; d) the failure to provide the correct timing of all signals. Persons to be safeguarded are: e) users of traffic signals, drivers and passengers of vehicles (including public transport), pedestrians, cyclists and equestrians, persons with physical disabilities; f) maintenance and inspection personnel. SIST EN 12675:2017
EN 12675:2017 (E) 6 1 Scope This European Standard specifies the functional safety requirements for traffic signal controllers. It is applicable to traffic signal control equipment permanently and temporarily installed, and portable traffic control equipment, with the exception of portable traffic signal equipment only capable of controlling alternate / shuttle working lanes (as further defined in 3.37), without the control of crossing vehicular or pedestrian movements. Traffic signal controllers, as defined by this European Standard, are required to control conflicting traffic, both vehicular and pedestrian in a safe manner. Examples are junction signals, pedestrian crossings, shuttle signals, public transport signals. The electrical safety requirements and additional traffic safety requirements, the interfacing with external equipment and the test methods for verifying compliance with this European Standard are contained in EN 50556. For a full applicability of this European Standard as well as of the EN 50556 the national standardization bodies are requested to define the set of classes relevant for their national requirements. NOTE National requirements may specify special conditions for public transport signals (PT) and for any other signal that is not specified in a European Standard. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50556:2011, Road traffic signal systems 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 absent signal intended signal the luminous intensity of which does not comply with the signal “ON” requirements Note 1 to entry: “ON” requirements as specified in EN 50556 3.2 bicycle signal traffic signal for the exclusive purpose of directing bicycle traffic at signalized locations 3.3 central control system for co-ordinating and monitoring a network or group of traffic signals using a central computer, or equivalent device, and transmission systems 3.4 conflicting green (green/green conflict) simultaneous display of green signals allowing conflicting traffic movements 3.5 conflicting signal groups two or more signal groups that will cause conflicting traffic movements if operated concurrently SIST EN 12675:2017
EN 12675:2017 (E) 7 3.6 failure mode non-operational state of the traffic signal controller in which, as a result of a major fault, the normal operation mode is replaced with a flashing yellow or a signals off condition 3.7 green signal signal that is displayed to traffic having the colour “green” Note 1 to entry: Colour “green” as specified in EN 12368. 3.8 major fault fault the occurrence of which has the effect that the safe operation of the signal traffic system cannot be guaranteed as defined in the national requirements 3.9 manual operation mode operational state of the traffic signal controller in which the state of the signals to traffic is controlled manually 3.10 memory device means of storing information in a manner permitting its retrieval 3.11 minor faults fault as defined in the national requirements, other than a major fault, that is capable of being identified and recorded 3.12 mode specific condition of a traffic signal controller used to control the signals to traffic EXAMPLE
— fixed time operation mode; — traffic dependent operation mode; — standby operation mode; — manual operation mode; — failure mode; 3.13 monitoring method of collecting information about the traffic signal controller including diagnostic checks used to detect a fault condition SIST EN 12675:2017
EN 12675:2017 (E) 8 3.14 national signal regulation order and appearance of signal aspects, displayed to traffic, that are prescribed in national requirements 3.15 national signal sequence sequential order and appearance of signals, to traffic, to satisfy a specific national condition and/or application EXAMPLE: signal start up sequence 3.16 normal operation mode any operational state of the traffic signal controller, other than failure mode, especially the operational state in which the signals are in accordance with the national signal regulation 3.17 pedestrian signal traffic signal for the exclusive purpose of directing pedestrian traffic at signalized locations 3.18 portable traffic signal control equipment traffic signal control equipment designed for temporary applications and designed for easy transportation from one site to another 3.19 power supply power source providing energy to an active device or circuit 3.20 public transport signals (PT) traffic signal for the exclusive purpose of directing public transport vehicles at signalized locations 3.21 red signal signal that is displayed to traffic having a colour “red” Note 1 to entry: Colour “red” as specified in EN 12368 3.22 safety timings time settings that, in the event of an error, can affect the safety of the traffic signal control equipment 3.23 shuttle signals set of traffic signals controlling a narrow section of road where traffic can only proceed in each direction alternately 3.24 signal dynamic message supplied to road users SIST EN 12675:2017
EN 12675:2017 (E) 9 3.25 signal group group of signal heads that always receive identical signal light indications 3.26 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 road users 3.27 standby operation mode operational state of the traffic signal controller in which a flashing yellow signal, or signals off condition, is permitted by the national signal regulation 3.28 start-up sequence when requested in standby operation mode of the controller, it may be required to go through a controlled start up sequence to change from the display of either “all signals off” or “flashing yellow” to normal operation mode 3.29 time base frequency frequency of the time base that is used to determine the duration of the signal states 3.30 time settings all the time information relating to the traffic signal controller for a particular intersection 3.31 traffic control regulation of traffic by traffic signals or traffic signs 3.32 traffic signal controller equipment driving and monitoring traffic signals 3.33 traffic signal control equipment traffic signal controller, working together with the signal under control, and the associated interfaced equipment 3.34 traffic signal controller logic set of logical functions in the traffic signal controller equipment related to driving and monitoring traffic signals 3.35 unwanted signal unintended signal the luminous intensity of which does not comply with the signal “OFF” requirements Note 1 to entry: Signal “OFF” as specified in EN 50556 SIST EN 12675:2017
EN 12675:2017 (E) 10 3.36 yellow signal signal that is displayed to traffic having a colour “yellow” Note 1 to entry: Colour “yellow” as specified in EN 12368 3.37 alternate / shuttle working controllers in these applications serve the alternating release of vehicle traffic in one direction at a time for one lane bottlenecks There is no crossing traffic, neither pedestrian, bicycle nor vehicular EXAMPLE road works, narrow bridges (Figure 1).
Key 1 single carriage way / bridge 2 carriageway restriction / road works Figure 1 — Example for Shuttle working lanes 4 Functional safety requirements 4.1 General This European Standard specifies the minimum safety requirements for traffic signal controllers to ensure the safe state of signals displayed to traffic. This safety consists of preventing a fault, or the consequences of a fault, that could result in the display of information liable to present a hazard to road users. A hazard to road users is prevented by the ability of the traffic signal controller to detect a specified fault condition and to change to a safe state. The change to a safe state is determined by the ability of the traffic signal controller to respond to the occurrence of faults in accordance with Clause 5. A fault condition may be dependent on the configuration of signal groups for specific application requirements. The specified fault condition shall be classified as a major or minor fault condition and acted on accordingly. Diagnostic checks shall be provided within the traffic signal controller for the detection of specified fault conditions. This is achieved by monitoring the appropriate: SIST EN 12675:2017
EN 12675:2017 (E) 11 a) outputs; b) logic circuits; c) inputs. 4.2 Application of power On application of power to the traffic signal controller, the controller shall undertake internal checks to ensure that the operating programs start in a pre-defined condition. In the event the predefined conditions could not be achieved, the traffic signal controller shall not change to the normal mode of operation. 4.3 Diagnostic checks of traffic signal controller logic system Continuous diagnostic checks shall check the traffic signal controller logic system. In the event of an error, the traffic signal controller shall change to the failure mode. 4.4 Classification of faults This European Standard defines the minimum specification for a traffic signal con
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