kSIST prEN 50668:2019

Railway applications - Signalling and control systems for non UGTMS Urban Rail systems

This standard specifies functional requirements for non-UGTMS signalling and control systems in the field of urban rail systems which are along off-street alignment and which operate to “line of sight” or automatic block signalling with intermittent train control.
The standard is restricted to Functional Requirements to which allow users to define more specific requirements based on the given frame of the system requirements at top level. This standard is not applicable to command and control systems for urban rail using continuous data transmission and continuous supervision of train movements by train protection profile already covered by IEC 62290 (UGTMS).

Bahnanwendungen - Nicht UGTMS Signal- und Zugbeeinflussungssysteme für den städtischen schienengebundenen Personennahverkehr

Applications ferroviaires - Systèmes de signalisation et de contrôle pour systèmes ferroviaires urbains non-UGTMS

Le présent document spécifie les exigences fonctionnelles minimales pour les systèmes de signalisation et de contrôle/commande des transports guidés urbains : - qui circulent en conduite à vue ou qui utilisent des signaux de cantonnement automatiques avec supervision ponctuelle des trains ; - qui ne sont pas couverts par la série EN 62290 relative aux systèmes de contrôle/commande et de gestion des transports guidés urbains (UGTMS) ; - qui ne relèvent pas d'un contrôleur de carrefour, mais qui peuvent être interfacés avec de tels systèmes. Le présent document se limite aux exigences fonctionnelles minimales qui permettent aux utilisateurs de définir des exigences plus spécifiques en fonction de la démonstration de sécurité globale du système. Le présent document ne s'applique pas aux systèmes de contrôle/commande des transports guidés urbains qui assurent en continu la transmission des données et le contrôle des mouvements des trains par courbe de contrôle de vitesse (ces systèmes étant déjà couverts par la série EN 62290).

Železniške naprave - Signalni in kontrolni sistemi za urbane želežniške sisteme, ki niso v sistemu UGTMS

Standards Content (sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Železniške naprave - Signalni in kontrolni sistemi za urbane želežniške sisteme, ki niso v sistemu UGTMSBahnanwendungen - Nicht UGTMS Signal- und Zugbeeinflussungssysteme für den städtischen schienengebundenen PersonennahverkehrApplications ferroviaires - Systèmes de signalisation et de contrôle pour systèmes ferroviaires urbains non-UGTMSRailway applications - Signalling and control systems for non UGTMS Urban Rail systems45.020Železniška tehnika na splošnoRailway engineering in general35.240.60Uporabniške rešitve IT v prometuIT applications in transportICS:Ta slovenski standard je istoveten z:prEN 50668oSIST prEN 50668:2018en01-maj-2018oSIST prEN 50668:2018SLOVENSKI

STANDARD
oSIST prEN 50668:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
DRAFT prEN 50668
March 2018 ICS
English Version

Railway applications - Signalling and control systems for non UGTMS Urban Rail systems

Applications ferroviaires - Systèmes de signalisation et de contrôle pour systèmes ferroviaires urbains non-UGTMS

Bahnanwendungen - Nicht UGTMS Signal- und Zugbeeinflussungssysteme für den städtischen schienengebundenen Personennahverkehr This draft European Standard is submitted to CENELEC members for enquiry.

Deadline for CENELEC: 2018-06-15.
It has been drawn up by CLC/SC 9XA.

If this draft becomes a European Standard, CENELEC 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 CENELEC in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the 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 Electrotechnical Standardization

Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23,

B-1040 Brussels © 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Project: 62183

Ref. No. prEN 50668 E oSIST prEN 50668:2018
prEN 50668:2018

Contents Page Introduction ........................................................................................................................................................ 4 1 Scope ..................................................................................................................................................... 5 2 Normative references ........................................................................................................................... 5 3 Terms, definitions and abbreviations ................................................................................................. 5 3.1 Terms and definitions .......................................................................................................................... 5 3.2 Abbreviations ........................................................................................................................................ 7 4 General provisions and boundary conditions ................................................................................... 7 4.1 General ................................................................................................................................................... 7 Figure 1 – Train operations on sight (TOS/GOA0) ......................................................................................... 8 Figure 2 – Non-automated train operations (NTO/GOA1a) ............................................................................ 8 Figure 3 – Combined train operations on sight (TOS/GOA0) and non-automated train operations (NTO/GOA1a) ......................................................................................................................................... 9 4.2 Independent point control ................................................................................................................... 9 4.3 Single track section control ................................................................................................................. 9 4.4 Level crossing control ......................................................................................................................... 9 4.5 Route control ....................................................................................................................................... 10 5 Hazards to be covered ....................................................................................................................... 10 5.1 General ................................................................................................................................................. 10 5.2 Independent point area ...................................................................................................................... 11 Table 1 — Hazard analysis for independent point area ............................................................................... 11 5.3 Single track section area ................................................................................................................... 12 Table 2 — Hazard analysis for single track section area ............................................................................. 12 5.4 Level crossing area ............................................................................................................................ 13 Table 3 — Hazard analysis for level crossing area ...................................................................................... 13 5.5 Route control area .............................................................................................................................. 13 5.5.1 Hazardous situations in TOS/GOA0.................................................................................................. 13 Table 4 — Hazard analysis for TOS/GOA0 route control area .................................................................... 14 5.5.2 Hazardous situations in NTO/GOA1a ............................................................................................... 15 Table 5 — Hazard analysis for NTO/GOA1a route control area .................................................................. 15 6 Functional requirements .................................................................................................................... 17 6.1 General ................................................................................................................................................. 17 6.2 Independent point control ................................................................................................................. 17 Figure 4 - Independent point control and boundary conditions ................................................................. 17 6.2.1 Set and block points ........................................................................................................................... 17 6.2.2 Signalling of points............................................................................................................................. 19 6.3 Single track section control ............................................................................................................... 19 6.3.1 General ................................................................................................................................................. 19 Figure 5 - Single track section control and boundary conditions .............................................................. 20 6.3.2 Set and secure single track section ................................................................................................. 20 6.3.3 Signalling of single track section...................................................................................................... 21 6.4 Level Crossing Control ...................................................................................................................... 21 6.4.1 General ................................................................................................................................................. 21 oSIST prEN 50668:2018

prEN 50668:2018

Figure 6 – Level crossing control and boundary conditions ....................................................................... 22 6.4.2 Set level crossings .............................................................................................................................. 22 6.4.3 Signalling of level crossings for rail traffic....................................................................................... 23 6.5 Route control ....................................................................................................................................... 23 6.5.1 General ................................................................................................................................................. 23 Figure 7 - Route control and boundary conditions (TOS/GOA0 applications) .......................................... 24 Figure 8 - Route control and boundary conditions (NTO/GOA1a applications) ........................................ 25 6.5.2 Set and secure routes ......................................................................................................................... 25 6.5.3 Display movement authority .............................................................................................................. 26 6.6 Interface with signal aspects of road traffic controller ................................................................... 27 Bibliography ...................................................................................................................................................... 28

oSIST prEN 50668:2018
prEN 50668:2018

Introduction This standard covers systems restricted to train operations on sight (TOS/GOA0) and non-automated train operations (NTO/GOA1a with intermittent control), and covers signalling on tramways and other urban rail systems which do not fall directly within either existing railway or highway standards. This would typically be for parts of systems which are along off-street alignment, and which operate to line of sight, or automatic block signalling with intermittent train control (i.e. as defined in EN 62290: GOA0 and GOA1 with intermittent control systems). This standard does not conflict with the scope and requirements of EN 62290. This standard does not set any operational rules, any system architecture or any rules for application conditions of technical systems for the different categories of urban rail systems. In this standard GOA1a describes GOA1 with intermittent control systems. This standard covers all GOA0 and GOA1a urban guided transport systems. Such systems require more functionality than that provided by traffic signal controllers (as set out in EN 12675) but avoid the requirements inherent in railway signalling systems which from a tramway perspective may be over-onerous and lacking in flexibility. Numerous states in Europe use these systems to control points, manage train movements along single lines and prevent conflicts at junctions as well as on at grade crossings with road and pedestrian traffic. Whilst adopting much of the functional requirements and safeguards used in standard traffic signal controllers, there is additional functionality required and currently in use to fulfil the needs of urban rail. Mainline railway signalling systems include a lot of such additional functionality, but in terms of this and the required safety integrity, they are not ideally suited to the needs of urban rail. The two fundamentally different approaches for the design of appropriate equipment are: • technology as used for traffic signal controllers, or • technology as used for signalling systems to be developed in accordance with Safety Integrity Levels sufficient for tramways and urban rail, both of which are currently in use to some extent on most systems. This may leave system owners and operators vulnerable to challenge, particularly after an incident, because there is no relevant accepted standard to justify appropriate use of such equipment. oSIST prEN 50668:2018

prEN 50668:2018

1 Scope This standard specifies functional requirements for urban rail signalling and control systems • which operate on line of sight or using automatic block signalling with intermittent train control, • not covered by existing UGTMS standard EN 62290, • not forming a part of an urban traffic control system but possibly interfaced with such systems. The standard is restricted to functional requirements which allow users to define more specific requirements based on the given framework of the system requirements at top level. This standard is not applicable to command and control systems for urban rail using continuous data transmission and continuous supervision of train movements by train protection profile (already covered by EN 62290). 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 62290:2014, (all parts), Railway applications - Urban guided transport management and command/control systems IEC 60050-821:2017, International electrotechnical vocabulary - Signalling and security apparatus for railways 3 Terms, definitions and abbreviations 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 3.1 Terms and definitions 3.1.1 external device device providing external demand inputs to elements of signalling control Note 1 to entry: The methods of making these demand inputs can vary from simple manual inputs to automatic data derived inputs from train-borne equipment. Note 2 to entry: Examples of input systems include: • Remote inputs from control rooms • Input from external device • A request transmitted from a train. 3.1.2 indicator variable sign that gives information to be observed by train drivers and staff entrusted to observe it oSIST prEN 50668:2018

prEN 50668:2018

3.1.3 level crossing level grade crossing crossing of a railway and a road at the same level Note 1 to entry: In some member states when a tramway on its own alignment crosses a road used by other traffic it does not normally do so as a level crossing within the meanings of national road and rail traffic legislation, but is usually termed a road junction or crossing at grade. References to level crossing in this standard equate to a crossing at grade when the urban rail system under consideration is a tramway. [SOURCE: IEC 60050-821:2017, 821-07-01, modified – Note 1 to entry has been added] 3.1.4 level crossing area portion of the level crossing between the road stop lines on either side of the railway 3.1.5 road traffic road vehicles, pedestrians, equestrians, bicycles and any other road users 3.1.6 route, predefined path for a traffic movement Note 1 to entry: This is as distinct from the meaning in railway signalling of a secure route. With respect to TOS/GOA0, the driver is the person in charge of the vehicle and is required to be able to stop the train within his sighting distance. [SOURCE: IEC 60050-821:2017, 821-01-22, modified – Note 1 to entry has been added] 3.1.7 signal, apparatus by means of which a conventional indication is given Note 1 to entry: This conventional indication, visual or acoustic, generally concerning the movements of railway vehicles, is transmitted to the staff entrusted to observe it. Note 2 to entry: When a tramway or part of a tramway is in an area which is part of the highway or public road it cannot be called a signal under some national legislation unless it complies with prescribed diagrams and usage to control traffic. Equipment used only to confirm such things as the lie and blocking of points may therefore described in some countries as a point indicator. In this standard where the terms point signal or point blocking signal appear, it shall be taken that these refer to a point indicator or point blocking indicator as appropriate. [SOURCE: IEC 60050-821:2017, 821-02-01, modified – Note 2 to entry has been added] 3.1.8 train combination of rolling stock coupled together Note 1 to entry: Rolling stock includes banking locomotives. Note 2 to entry: The term is used in this standard for all categories of urban rail, such as trams, light rail, underground urban rail, local rail systems and does not imply a specific term used exclusively in the railway domain. [SOURCE: IEC 60050-811:2017, 811-01-08, modified – Note 2 to entry has been added] oSIST prEN 50668:2018

prEN 50668:2018

3.2 Abbreviations For the purposes of this document, the following abbreviations apply. GOA Grade of Automation GOA0 Grade of Automation 0 GOA1a Grade of Automation 1 with Intermittent Supervision HMI Human Machine Interface NTO Non-automated Train Operations (O) Optional TOS Train Operations on Sight UGTMS Urban Guided Transport Management System 4 General provisions and boundary conditions 4.1 General The systems covered by this standard and their components should be suitable for use on street alignment or off-street alignment. Figures 1 to 3 below provide an overview of the areas of non UGTMS Urban Rail systems for which operational scenarios need to be considered. In each area a train passes through, specific functionality is required. This standard covers the following areas: • Independent points used for TOS/GOA0 operations, to direct trains to different tracks of the network. • Single track sections used for TOS/GOA0 operations where the guideway layout is restricted to a single track for train movements in either direction of travel. • Level crossings (crossings at grade) used for both TOS/GOA0 and NTO/GOA1a operation, where an off-street guideway crosses public streets and/or footpaths. • Route control area used for: o TOS/GOA0 where the guideway layout has a higher complexity and it is reasonable to set a route consisting of various route elements for passage of the train, o NTO/GOA1a where train movements on safe routes are compulsory. oSIST prEN 50668:2018

prEN 50668:2018
Figure 1 – Train operations on sight (TOS/GOA0)
Figure 2 – Non-automated train operations (NTO/GOA1a) Signalling System
Level Crossing
External Systems
(e.g. Operations Control System, Road Traffic Controller)
Route Control Area Non-automated Train Operations (NTO/GOA1) Signalling System
Independent Point Single Track

Level Crossing Route Control Area Train Operations on Sight (TOS/GOA0) External Systems

(e.g. Operations Control System, Road Traffic Controller) oSIST prEN 50668:2018
prEN 50668:2018

Figure 3 – Combined train operations on sight (TOS/GOA0) and non-automated train operations (NTO/GOA1a) 4.2 Independent point control Independent point control is used to set points in different positions and to avoid points moving under trains by: • setting and securing points, • indication of points (by displaying the position of the points). Independent point control is used for train operations on sight (TOS/GOA0) and covers independent points which may be linked together, but it is not part of a route control area. 4.3 Single track section control Single track section control is to prevent concurrent use of a single track section by trains travelling in opposite directions by: • ensuring single track sections are set and secured, • signalling of single track sections. Single track section control is used for TOS/GOA0 operation. Control of points is treated separately. 4.4 Level crossing control Level crossing control is to prevent concurrent use of the guideway by rail and crossing road/pedestrian traffic by: • signalling and/or signage of level crossings for rail and road traffic, and • when signalled, closing to road /pedestrian traffic and holding level crossing for use by rail traffic. Level crossing control is used for both TOS/GOA0 and NTO/GOA1a operations. Some functionalities of level crossing control are covered by route control for NTO/GOA1a operation. Signalling System

Independent Point Single Track
Level Crossing
Route Control Area External Systems
(e.g. Operations Control System, Road Traffic Controller)

Route Control Area Train Operations on Sight (TOS/GOA0) Non-automated Train Operations (NTO/GOA1) Level Crossing

oSIST prEN 50668:2018
prEN 50668:2018

4.5 Route control Route control is used to set routes via various route elements for: TOS/GOA0 the prevention of conflicting movements and points moving under trains, by: • setting and securing routes via switchable (e.g. points) and non-switchable (e.g. level crossings, track sections) route elements, • signalling of routes. NTO/GOA1a the prevention of conflicting movements and points moving under trains, by: • setting and securing routes via switchable (e.g. points) and non-switchable (e.g. crossing, track sections) route elements, • ensuring safe separation of trains, • signalling of routes and supervision of train movements at specific locations. 5 Hazards to be covered 5.1 General Boundary conditions depending on grades of automation: In TOS/GOA0 operation, it is assumed that • whilst operating on street alignment, conflicts with other road and pedestrian traffic are covered by highway legislation and means of prevention (e.g. traffic signs, road traffic signals and controllers) are therefore not part of this hazard identification, • the train driver is responsible for carrying out such functions, within the boundary conditions defined by national or operational rules, • the separation of trains is the responsibility of the driver, and the driving speed is such that the braking distance of the train remains shorter than the sighting distance, • the determination of appropriate speed to avoid collisions is the responsibility of the train driver, • the observance of appropriate speed to avoid derailment is the responsibility of the train driver. In NTO/GOA1a operation • trains operate on a segregated guideway, • the separation of trains is managed through the signalling system, • speed supervision is part of the signalling system (O). oSIST prEN 50668:2018

prEN 50668:2018

5.2 Independent point area Boundary conditions • hazard analysis is generally required for remotely set points (e.g. by train approach), • for locally set points, the driver is responsible for checking that the switching of the point is permissible, for observing that the point is correctly positioned and to observe the permitted speed relative to the position of the points, • there are no conflicting train movements. Table 1 — Hazard analysis for independent point area Case Hazardous situation Unwanted occurrence Mitigation Function Remarks 1 Remotely set point in unexpected position Collision with other train or road traffic Independent point control - point machine Set and block points - detect position of point

2 Remotely set point moves under the train Derailment Independent point control - block point Set and block points for passage of a train

Point blocking equipment including train detection and physical locks 3 Conflicting movement Collision

See NOTE 2 4 Train passes point at inappropriate speed Derailment Independent point control - point indicator Signalling of points - display position of points See NOTE 1 Displayed position supports the driver in determining the permitted speed 5 Train moves on guideway TOS/GOA0 - road traffic controller displays movement authority in direction divergent from point signal, train driver continues train movement wrongly based on road traffic controller authorization Collision with other train or road traffic Independent point control - Interface to road traffic controller Signalling of points - consistency of road traffic controller aspect Optional NOTE 1 The use of point indicators is not necessary if in defined cases of low speed operation over remotely set points the train driver is responsible for observing that the point is correctly positioned and for determining the appropriate speed, according to the position of the points. NOTE 2 Protection against conflicting train movement is the driver’s responsibility. oSIST prEN 50668:2018

prEN 50668:2018

5.3 Single track section area Boundary conditions • hazard analysis is limited to the section of track which is designated for bidirectional use. Table 2 — Hazard analysis for single track section area Case Hazardous situation Unwanted occurrence Mitigation Function Remarks 1 Conflicting train movement while trains are approaching at the same time from both directions Collision Single track section control Set and secure single track section - secure track section in requested direction See NOTE 1 2 Conflicting train direction request to current train movements in section Collision Single track section control. - Secure section Set and secure single track section for passage of a train See NOTE 1 3 Track for bidirectional operation secured and unauthorised movement in opposite direction Collision Single track section control - Signal for train operation on sight - warning elements (optional) Signalling of single track section - ensure section signals set to stop - activate warning elements (optional)

4 Train moves on guideway TOS/GOA0 - road traffic controller displays movement authority divergent from signal for single track section, train driver continues train movement wrongly based on road traffic controller authorization Collision with other train or road traffic Single track section control - Interface to road traffic controller Signalling of single track section - consistency with road traffic controller aspect

NOTE 1 The use of single track section control is not necessary, if • the single track section is sufficiently short to be observed end to end by drivers • movement authority is granted by operational procedures (e.g. secured by token) for temporary single track sections (e.g. track works) oSIST prEN 50668:2018

prEN 50668:2018

5.4 Level crossing area Boundary conditions • hazard analysis is limited to events affecting train movements, • on level crossings on which priority to rail traffic is given, the road traffic should obey the road traffic signals/signage. Table 3 — Hazard analysis for level crossing area Case Hazardous situation Unwanted occurrence Mitigation Function Remarks 1 Train moves on guideway approaching level crossing - road traffic passes level crossing Collision with road traffic Level Crossing control - road traffic level crossing signals - barriers (optional) Closing level crossings to road traffic See NOTE 1. 2 Train moves on guideway - road traffic is not able to leave the level crossing due to traffic congestion Collision with road traffic on level crossing Level crossing control - Interface with road traffic management Closing and holding level crossings - potential interface to adjacent road traffic controllers

3 Train moves on guideway - Route not secured for train movement though level crossing, unauthorised train movement Collision with road traffic Level Crossing control - signal for train operations on sight - level crossing supervision signal Signalling of level crossing for rail traffic - authorize train movement

NOTE 1 The use of level crossing control may not be necessary, if • visibility between approaching train and road traffic is ensured and • road traffic signs for level crossing give priority to train movements. 5.5 Route control area 5.5.1 Hazardous situations in TOS/GOA0 Boundary conditions • separation of trains in TOS/GOA0 is the responsibility of the train driver, including avoidance of anything in conflict with the path of a train, • determination of speed in TOS/GOA0 is the responsibility of the train driver following operational rules (knowledge of permitted speed, speed signs and/or point indicators, signal aspects for train operations on sight). oSIST prEN 50668:2018

prEN 50668:2018

Table 4 — Hazard analysis for TOS/GOA0 route control area Case Hazardous situation Unwanted occurrence Mitigation Function Remarks 1 Train moves on guideway - power operated point moves while train passes point Derailment Block points Set and secure routes - Detect trains in route

2 Train moves on guideway against the currently authorized direction of traffic Collision Route control Set and secure routes

...