Lineside Signals, Indicators and Layout of Signals

Transcription

1 To be part superseded by GKRT0045 Iss 4, GKRT0057 Iss 1 and GKRT0058 Iss 1 published on 06/12/2014 Lineside Signals, Indicators and Layout of Signals Synopsis This document defines the format, presentation and layout of lineside signalling equipment that is used to display movement authority information to infrastructure managers operating stations, and railway undertaking personnel. This document contains requirements that are amended under the Railway Group Standards Code ( ) as a small scale change. Reference to the amended requirements is made in the record. All other parts of the document are unchanged from the previous issue. [This document contains one or more pages which contain colour] Copyright in the s is owned by Rail Safety and Standards Board Limited. All rights are hereby reserved. No (in whole or in part) may be reproduced, stored in a retrieval system, or transmitted, in any form or means, without the prior written permission of Rail Safety and Standards Board Limited, or as expressly permitted by law. Members are granted copyright licence in accordance with the Constitution Agreement relating to Rail Safety and Standards Board Limited. In circumstances where Rail Safety and Standards Board Limited has granted a particular person or organisation permission to copy extracts from Railway Group Standards, Rail Safety and Standards Board Limited accepts no responsibility for, nor any liability in connection with, the use of such extracts, or any claims arising therefrom. This disclaimer applies to all forms of media in which extracts from s may be reproduced. Published by: Block 2 Angel Square 1 Torrens Street London EC1V 1NY Copyright 2012 Rail Safety and Standards Board Limited

2 record Date Comments One 06 February 2010 Original document Two 03 March 2012 Replaces issue one Small scale change amendment to issue two necessitated by revision of and to permit the use of a bar of light or a line of five lunar white light points to display the indication of route 01 December 2012 Replaces issue two Clauses 9.1.1, 9.1.2, 9.1.3, and relating to identity of signals and indicators were removed from issue two as these were transferred to GK/RT0009 issue four which was published in June 2011 Small scale change amendment to clause c) to allow the use of the X alphanumeric route indicator to additionally denote a movement along a bi-directional line in the opposite direction to the normal flow of traffic Amended or additional parts and/or sections of revised pages have been marked by a vertical black line in the adjacent margin. Superseded documents The following Railway Group documents are superseded, either in whole or in part as indicated: Superseded documents, issue two, Lineside Signals, Indicators Sections superseded Date when sections are superseded All 02 March 2013 Supply, issue two,, ceases to be in force and is withdrawn as of 02 March The authoritative version of this document is available at Uncontrolled copies of this document can be obtained from Communications,, Block 2, Angel Square, 1 Torrens Street, London EC1V 1NY, telephone or enquirydesk@rssb.co.uk. Other Standards and associated documents can also be viewed at Page 2 of 72

3 Contents Section Description Page Part 1 Purpose and Introduction Purpose Introduction Approval and authorisation of this document 7 Part 2 Requirements for Signalling Equipment Display of operational information using the signalling system Specification of lineside signals Specification of route indicators Specification of lineside indicators Specification of lineside signs and buffer stops used as signals 30 Part 3 Layout of Signals: Requirements for Stop Signals Provision of stop signals and signalling indicators 33 Part 4 Layout of Signals: Aspect Sequences Requirements for cautionary aspect sequences Requirements for banner repeating signal aspects 42 Part 5 Layout of Signals: Junction Signalling Requirements for route indications Junction signalling: colour light signal aspect sequences Junction signalling: semaphore signal aspect sequences Junction signalling: AWS requirements Junction signalling: prohibited aspects 54 Part 6 Layout of Signals: Bi-directional Signalling Bi-directional signalling 56 Part 7 Layout of Signals: Combinations of Signal Aspects and Indications Combinations of signal aspects (including ERTMS level 2 operated lines) Combinations of signal aspects and route indications Signalling indications displayed in association with signal aspects 58 Part 8 Degraded Signalling Degraded colour light signalling 60 Part 9 Application of this document Application - infrastructure managers Application - railway undertakings Health and safety responsibilities 62 Appendices Appendix A Signals and Indicators: Emitted Light Parameters 63 Appendix B Signals and Indicators: Structure Requirements 64 Appendix C Signals and Indicators: Standard Performance Categories 65 Appendix D Positioning Criteria for Stop Signals on Electrified Lines 66 Definitions 69 References 72 Page 3 of 72

4 Tables Table 1 Colour light signal ON and OFF aspects 8 Table 2 Banner repeating signals ON and OFF aspects 12 Table 3 Independent position light signals ON and OFF aspects 13 Table 4 Subsidiary position light signals associated with a colour light signal: ON and OFF aspects 14 Table 5 Independent position light signals (limit of shunt) aspect 14 Table 6 Semaphore main stop signal ON and OFF aspects 15 Table 7 Semaphore distant signal ON and OFF aspects 17 Table 8 Semaphore subsidiary signal ON and OFF aspects 18 Table 9 Semaphore shunting signal ON and OFF aspects 19 Table 10 Position light junction indicator: displayed route indications 21 Table 11 Preliminary route indicators: displayed indications 23 Table 12 Points indicator: displayed indications 23 Table 13 Driver s level crossing indicator: displayed indications 24 Table 14 Loading / unloading indicator: displayed indications 25 Table 15 SPAD indicator: displayed indications 25 Table 16 OFF indicator: displayed indications 27 Table 17 CD and RA indicators: displayed indications 27 Table 18 BU indicators: displayed indications 28 Table 19 TPWS indications 28 Table 20 Permitted combinations of TPWS, points and / or LC indications 30 Table 21 Stop board: permitted dimensions 31 Table 22 Methods of junction signalling 47 Table 23 Speed ranges for flashing aspect sequences 48 Table 24 Permitted combinations of signal aspects 57 Table 25 Permitted combinations of signals and route indicators 58 Table 26 Permitted combinations of signals and route indicators 59 Table A.1 Colour classes for signal lights 63 Table C.1 Standard performance categories 65 Figures Figure 1 Example of a 4-aspect colour light splitting distant signal (left-hand divergence) mounted on the left-hand side of the line 10 Figure 2 Banner repeating signal aspect meeting standard performance category 2 12 Figure 3 Semaphore main stop signal arm 15 Figure 4 Distant signal arm 16 Figure 5 Semaphore subsidiary signal arm 17 Figure 6 Semaphore shunting signals 18 Figure 7 Figure 8 Position light junction indicator using five lunar white lights (example shows position 1) 19 Position light junction indicator using a bar of light (example shows position 1) 20 Figure 9 Orientation of position light junction indications relative to diverging routes 21 Figure 10 SPAD indicator 26 Figure 11 Stop board 30 Figure 12 Distant board 31 Figure 13 Buffer beam: format and colour 32 Figure 14 Example of a 3-aspect to 4-aspect transition using transition method 1 39 Figure 15 Example of a 3-aspect to 4-aspect transition using transition method 2 39 Figure 16 Example of a 3-aspect to 4-aspect transition using transition method 3 40 Figure 17 Figure 18 Semaphore junction signal: examples of main signals displaying stepped multiple semaphore arms 53 Semaphore junction signal: examples of main signals displaying stacked multiple semaphore arms 53 Page 4 of 72

5 Part 1 Purpose and Introduction 1.1 Purpose The purpose of this document is to specify the parameters and application of lineside signalling equipment that is used to display information about movement authorities, equipment status and required operations to infrastructure managers at stations and railway undertaking personnel. This document mandates the requirements for: a) The format and presentation of signals and their displayed aspects. b) The format and presentation of indicators and their displayed indications. c) The permitted combinations of signals and indicators. d) The criteria for positioning signals within the layout. e) The permitted type(s) of lineside signal and their application constraints. f) The permitted sequences of signal aspects and indications displayed to drivers. g) The forms of signal identification necessary to support communication of safety related operational messages between train crew and signallers Parts 2, 3, 4, 5, 6, 7, 8 and 9 of this document are applicable to areas where train movements are controlled using lineside signalling Parts 2, 4 and 7 of this document include some requirements (set out in 2.4.5, and 7.1) applicable to areas where train movements are controlled using the European Rail Traffic Management System (ERTMS) Level 2 without lineside signals. Where this is the case, the particular applicability to ERTMS is described in the section heading and the applicable clause(s). 1.2 Introduction Background Lineside signals and indicators are provided by the infrastructure manager where it is necessary to display information about movement authorities, equipment status and / or required operations to railway undertaking personnel, including train crew (for example, drivers, shunters and guards) and station staff (for example, train dispatchers) Movement authority information displayed by lineside signalling equipment includes information about: a) The extent of the movement authority issued by the signaller or ground frame operator (depicted by the sequence of signal aspects). b) The route that is set and the destination (depicted by combinations of signal aspects and route indications) At some locations, movement authority information is supplemented by additional information relating to the train operation, typically: a) Infrastructure equipment status (for example, locally monitored level crossings), and Page 5 of 72

6 b) Operational information (for example, Close doors ) Railway undertaking personnel are able to: a) Understand the operational rules that are associated with the aspects and indications displayed by signalling equipment. b) Understand the movement authorities issued by the infrastructure manager using: i) The sequence of displayed signal aspects and indications. ii) iii) Knowledge of the route and the geographical location. Knowledge of the required train movement Principles c) Control the movement of trains within the limits of the movement authority. d) Identify and report signal aspect and indication irregularities This document provides for infrastructure managers and railway undertakings compatibility in terms of understanding the information conveyed by signal aspects and indications. Incompatibility is a causal factor of an operational irregularity such as a signal passed at danger (SPAD) The GE/RT8000 Rule Book sets out: a) The operational meaning of signal aspects and indications displayed by the infrastructure manager. b) The rules for train driving, which include the requirement to control the speed of the train with respect to the aspects and indications displayed by signals. c) The rules for shunting. d) The rules for train dispatch. e) The rules for reporting signalling system failures The lineside signalling equipment is compatible with the operating rules, so that operating personnel can correctly interpret the information displayed by the signalling system The standard performance requirements applicable to lineside signals and indicators are specified, so that displayed aspects and indications are visible to the driver The layout of signalling equipment is specified so that, when train movements take place, drivers are given sufficient and appropriate movement authority information Related requirements in other documents The following s contain requirements that are relevant to the scope of this document: GC/RT5021 GE/RT8000 Track System Requirements Rule Book Page 6 of 72

7 GE/RT8030 GE/RT8035 GE/RT8037 GE/RT8071 GK/RT0075 GK/RT0044 GO/RT3215 Requirements for a Train Protection and Warning System (TPWS) Automatic Warning System Signal Position and Visibility Control Facilities for use during Lineside Signalling Failures Lineside Signal Spacing and Speed Signage Controls for Signalling a Train onto an Occupied Line Requirements for the Weekly Operating Notice, Periodical Operating Notice and Sectional Appendix Supporting documents The following Railway Group documents support this : GK/GN0645 Guidance on and Layout of Signals 1.3 Approval and authorisation of this document The content of this document was approved by Control Command and Signalling (CCS) Standards Committee on 13 September This document was authorised by on 26 October Page 7 of 72

8 Part 2 Requirements for Signalling Equipment 2.1 Display of operational information using the signalling system Signalled movement authorities shall: a) Be displayed only by the lineside signals and route indicators set out in this standard (see 2.2, 2.3 and 2.5), except where lineside operational signs are used to display information about movement authorities in accordance with GK/RT0055, and b) Be displayed only using the sequences and combinations of signal aspects and indications set out in this standard (see Parts 3, 4, 5, 6, 7 and 8) Signalling indications shall be displayed only by the lineside indicators set out in this standard (see 2.4) The observed colour of light emitted by lineside signals and indicators shall comply with specified parameters (see Appendix A) Lineside signal and indicator structures shall comply with specified parameters (see Appendix B) Lineside signals shall be identified (see Part 9). 2.2 Specification of lineside signals Colour light signal Colour light signals shall only display the signal aspects set out in Table 1. Signal aspect (see Appendix A) One signal red light One signal yellow light Two signal yellow lights displayed vertically One signal yellow flashing light Two signal yellow flashing lights displayed vertically One signal green light Table 1 Description MA information Remarks RED End of MA For application requirements see 3.1 SINGLE YELLOW End of MA ahead For application requirements see 4.1 DOUBLE YELLOW FLASHING SINGLE YELLOW FLASHING DOUBLE YELLOW GREEN Colour light signal ON and OFF aspects Approaching end of MA Diverging route set at the next signal Approaching a diverging junction Line clear For application requirements see 4.1 For application requirements see For application requirements see Colour light signals shall display the relevant signal aspect at all times, except: a) For those signals that are configured as approach lit signals (see 4.1.8), and Page 8 of 72

9 b) Where the signalling technology used incorporates self-testing functionality that requires a brief interruption of the displayed aspect at defined intervals, in which case each interruption shall not exceed 250 ms Except for splitting distant signals (see 2.2.2) and co-acting signals (see 2.2.3): a) Each colour light signal shall display only one signal aspect at a time, and b) No other combination of colour light signal lights shall be displayed by colour light signals Colour light signal lights that are designed to flash shall comply with the following criteria: a) Flash at a frequency of 60 (+/-10) cycles per minute. b) Have a mark:space ratio that provides visibility of the signal light for 50% - 66% of each flashing cycle when observed in accordance with the relevant standard performance category (see Appendix C). c) Flash in synchronism within the signal head when the flashing double yellow aspect is displayed. d) Flash in synchronism throughout the primary and co-acting signal heads when flashing aspects are displayed by co-acting signals Each colour light signal light shall have an apparent light source that: a) Has a diameter of 210 mm (-10mm/+20 mm), and b) Meets the colour requirements set out in Appendix A Where the colour light signal head incorporates multiple signal light sources (for example, to display a double yellow aspect), the two illuminated signal light apertures shall be vertically aligned with a centre to centre separation of 510 (+20/-10 mm) Except where signal sighting can be consistently achieved without a backboard (for example, where a signal is positioned in a dark environment), a backboard shall be provided with each colour light signal (see Appendix C) Where the backboard is incorporated into the signal head, it shall have the following dimensions: a) 300 mm (minimum) from the centre of the top signal light aperture to the top edge of the signal backboard. b) 300 mm (minimum) from the centre of the signal light aperture to the left and right side edges of the signal backboard. c) 180 mm (minimum) from the centre of the bottom signal light aperture to the bottom edge of the signal backboard Where a separate backboard is provided behind the signal head, it shall be of sufficient size to appear no smaller than a signal head mounted backboard Long-range colour light signals shall comply with standard performance category 1 (see Appendix C). Page 9 of 72

10 Short-range colour light signals shall comply with standard performance category 2 (see Appendix C) Colour light signal configured as a splitting distant signal The application requirements for splitting distant signals are set out in Splitting distant signals shall incorporate two colour light signal heads (see 2.2.1), referred to as the primary head and the offset head The primary head and offset head shall: a) Be mounted so that the horizontal separation between signal light centres in the two signal heads is 600 mm 900 mm, and b) Be positioned and aligned so that horizontally displayed signal lights appear level to the train driver (see example in Figure 1) The splitting distant signal shall be positioned so that the primary head is located as near as practicable to the driver s line of sight, that is to say: a) For signals mounted on the left-hand side of the line, the primary head shall be mounted to the right-hand side of the offset head (see example in Figure 1), and b) For signals mounted on the right-hand side of the line, the primary head shall be mounted to the left-hand side of the offset head. Figure 1 Example of a 4-aspect colour light splitting distant signal (left-hand divergence) mounted on the left-hand side of the line Splitting distant colour light signals shall comply with standard performance category 1 (see Appendix C). Page 10 of 72

11 2.2.3 Co-acting signals (colour light signal and semaphore signal) Co-acting signals shall incorporate: a) Primary signal and, where relevant, route indicator equipment that is positioned to provide the required long-distance signal sighting and readability, as set out in GE/RT8037, and b) Co-acting signal and route indicator equipment that displays the same form (that is to say, colour light or semaphore) of signal aspect and route indication as the primary equipment, and positioned to provide the required close-up signal sighting and readability, as set out in GE/RT The primary and co-acting signal and route indicator equipment shall meet the same standard performance requirements (see Appendix C), except where there is insufficient space to provide compatible equipment, in which case: a) The primary signal and route indicator equipment shall meet the appropriate standard performance requirement compatible with the long-distance signal sighting and readability, and b) The co-acting signal head and route indicator equipment shall meet the standard performance requirement that is appropriate for close-up signal sighting and readability The same main signal aspect and route indication shall be displayed by the primary and co-acting signals at all times The same subsidiary / shunting aspect and route indication shall be displayed by the primary and co-acting signals at all times, except at signals where subsidiary / shunting aspects and route indications are omitted from the primary signal Subsidiary / shunting signal aspects and route indications shall only be omitted from the primary signal if the co-acting signal equipment, on its own, provides the required sighting and readability for these aspects Signals shall only display movement authorities towards co-acting signals when both the primary and co-acting signals are detected to be displaying the correct signal aspect, except when a failure of the second yellow light of a double yellow aspect in either the primary signal or co-acting signal means results in one signal displaying a more restrictive single yellow aspect in error Banner repeating signal Banner repeating signals shall consist of a rectangular black or unlit bar, contrasted against a circular illuminated background state banner repeating signals shall comply with standard performance category 2 (see Appendix C), except at locations where the signal sighting and readability requirement (as set out in GE/RT8037) is compatible with the use of a standard performance category 3 banner repeating signal (for example, in a station platform where all trains start from rest) state banner repeating signals shall comply with (see Appendix C): a) Standard performance category 1 in terms of distinguishing a green OFF aspect from a white OFF aspect, and b) Standard performance category 2 in terms of readability of the white ON and white OFF aspect. Page 11 of 72

12 The format and dimensions of a standard performance category 2 banner repeating signal that displays an aspect using direct transmission of light (for example, fibre-optic and light-emitting diode (LED) signals), shall be as shown in Figure 2. ILLUMINATED AREA BAR (BLACK OR UNLIT) ILLUMINATED AREA All dimensions in millimetres. Figure 2 Banner repeating signal aspect meeting standard performance category Category 3 banner repeating signals shall display the same relative proportions of black and illuminated areas as performance category 2 banner repeating signals, as shown in Figure 2, and meet the performance requirement for signal readability (see Appendix C) Where white light is reflected or used to silhouette a moveable black bar (2-state banner signal only), the banner repeating signal shall comply with the equipment performance requirement for signal readability (see Appendix C) Banner repeating signal ON and OFF aspects shall be as set out in Table 2. Aspect (see Appendix A) Description MA information Remarks A horizontal black bar against a signal white background A black bar angled at 45 o +/- 5 o in the upper quadrant position against a signal white background Banner ON White Banner OFF The associated signal is the end of the MA 2-state banner repeating signal The associated signal is OFF 3-state banner repeating signal The associated signal is displaying a cautionary aspect See b and c See a See b A black bar angled at 45 o +/- 5 o in the upper quadrant position against a signal green background Table 2 Green Banner OFF Line clear Banner repeating signals ON and OFF aspects See a Page 12 of 72

13 Splitting banner repeating signals shall incorporate two banner repeating signal heads The dimension between the centre of the two signal heads of a splitting banner repeating signal shall be: a) 1000 mm (+/- 100 mm) in the horizontal plane, and b) 500 mm (+/- 50 mm) in the vertical plane, except where there is no obvious straight ahead route at the junction, in which case the two signal heads shall be positioned at the same level Position light signal (including ERTMS level 2 fitted lines) The requirements for provision of stop signals, including position light signals, are set out in Position light signals shall display ON and OFF aspects by means of the position and colour of lights Independent position light signals shall only display one of the aspects set out in Table 3 at a time Independent position light signals that display the ON aspect using two yellow lights shall only be provided by exception and only as a direct replacement for an existing semaphore yellow shunting disc signal or existing yellow/white position light signal. Aspect Description MA information Two signal red lights horizontally displayed Two signal yellow lights horizontally displayed ON ON End of MA End of MA for movements travelling in the direction(s) to which the signal can be cleared Two lunar white lights displayed at an upper OFF Shunting MA quadrant angle of 45 o Two lunar white flashing lights displayed at an upper quadrant angle of 45 o Table 3 OFF Independent position light signals ON and OFF aspects Degraded MA Position light signals associated with a colour light signal shall only display one of the aspects set out in Table 4 at a time. Aspect Description MA information No light displayed ON Obey colour light signal aspect Two lunar white lights displayed at an upper quadrant angle of 45 o in association with a colour light signal red aspect OFF Permissive MA (For calling-on movements, the section ahead is occupied) Page 13 of 72

14 Aspect Description MA information Two lunar white flashing lights displayed at an upper quadrant angle of 45 o with or without a colour light signal red aspect Table 4 OFF Degraded MA Subsidiary position light signals associated with a colour light signal: ON and OFF aspects Position light signals used to mark the limit of shunt for a movement in the opposite direction to the signalled flow of traffic shall continuously display the ON aspect set out in Table 5. Aspect Description MA information Two signal red lights horizontally displayed Table 5 ON Independent position light signals (limit of shunt) aspect End of MA Where independent position light signals that display the aspects set out in Table 3 are to be added to an existing signalling layout that includes independent position light signals that display a different form of ON aspect, the signalling layout shall be designed so that: a) Drivers will not observe the different forms of ON aspect at the same time during train movements, and b) The transition between the different forms of ON aspect is clearly defined Position light signal aspects that are designed to flash shall: a) Flash at a frequency of 60 (+/- 10) cycles per minute, and b) Have a mark:space ratio that provides visibility of the signal light for 50% - 66% of each flashing cycle when observed in accordance with standard performance category 3 (see Appendix C) Position light signals shall comply with standard performance category 3 (see Appendix C) Semaphore main stop signal and distant signal Semaphore main stop signals shall display aspects by means of a rectangular semaphore signal arm and coloured lights Semaphore main stop signals shall comply with standard performance category 4 (see Appendix C), except where a signal is provided to authorise train movements from a goods line or siding(s) onto a passenger line. In such cases the semaphore main stop signal shall comply with either standard performance category 4 or standard performance category 2, whichever is appropriate for the signal sighting and readability requirement The colour, format and dimensions of semaphore main stop signal arms meeting performance category 4 shall be as shown in Figure 3. Page 14 of 72

15 The dimensions of semaphore main stop signal arms meeting performance category 2 shall be as set out in and as shown in Figure 6, except where a larger standard performance category 2 signal arm is provided to maintain consistency with an existing signalling layout mm 318 mm 178 mm 260 mm SIGNAL POST END FRONT VIEW 178 mm 318 mm SIGNAL POST END BACK VIEW RED BS 381C shade 537 BLACK WHITE Tolerance on all dimensions: ± 5% Figure 3 Semaphore main stop signal arm Semaphore main stop signals shall only display the ON and OFF aspects, as set out in Table 6. Aspect Description MA information a) Signal arm horizontal (+5 o /-5 o ) b) Signal red light (see Appendix A) a) Signal arm raised or lowered by an angle of 45 (+20 o /-10 o ) b) Signal green light (see Appendix A) ON OFF End of MA Signal section clear Table 6 Semaphore main stop signal ON and OFF aspects Page 15 of 72

16 Semaphore distant signals shall display aspects by means of a rectangular semaphore signal arm with a fishtail end and coloured lights Semaphore distant signals shall comply with standard performance category 4 (see Appendix C) The colour, format and dimensions of semaphore distant signal arms shall be as shown in Figure mm 241 mm 210 mm 260 mm 25 mm SIGNAL POST END 25 mm 102 mm FRONT VIEW 210 mm 241 mm SIGNAL POST END BACK VIEW 190 mm YELLOW BS 381C shade 356 BLACK WHITE Tolerance on all dimensions: ± 5% Figure 4 Distant signal arm Semaphore distant signals shall only display the ON and OFF aspects set out in Table 7. Page 16 of 72

17 Aspect Description MA information a) Signal arm horizontal (+5o/-5o) b) Signal red light (see Appendix A) c) Signal arm raised or lowered by an angle of 45 (+20 o /-10 o ) d) Signal green light (see Appendix A) ON OFF End of MA ahead Line clear (see b) Table 7 Semaphore distant signal ON and OFF aspects Semaphore subsidiary signal Semaphore subsidiary signals shall be provided in accordance with GK/RT Semaphore subsidiary signals shall display aspects by means of a rectangular semaphore signal arm, and coloured lights, positioned below the main arm of the semaphore stop signal that it is associated with and on the same signal post The colour, format and dimensions of semaphore subsidiary signal arms shall be as shown in Figure mm 77mm 41mm FRONT VIEW 159mm SIGNAL POST END RED BS 381C shade 537 SIGNAL POST END 115mm 152mm BLACK WHITE BACK VIEW Tolerance on all dimensions: ± 5% Figure 5 Semaphore subsidiary signal arm Semaphore subsidiary signals shall comply with standard performance category 3 (see Appendix C) Semaphore subsidiary signals shall display only the ON and OFF aspects, as set out in Table 8. Page 17 of 72

18 Aspect Description MA information a) Signal arm horizontal (+5 o /-5 o ) b) Signal red light (see Appendix A) a) Arm raised or lowered by angle of 45 (+20 o /-10 o ) b) Signal green light (see Appendix A) Table Semaphore shunting signal ON OFF Semaphore subsidiary signal ON and OFF aspects Obey associated semaphore stop signal Permissive MA Semaphore shunting signals shall be provided in accordance with Semaphore shunting signals shall display aspects using either one of the following: a) A miniature rectangular semaphore arm and coloured lights. b) A semaphore disc and coloured lights. c) A semaphore disc illuminated by floodlighting The colour, format and dimensions of semaphore shunting signals shall be as shown in Figure 6, except where a larger standard performance category 3 signal is provided to maintain consistency with an existing signalling layout. 146mm 102mm 146mm FRONT VIEW DISC TYPE BACK VIEW DISC TYPE 533mm 152mm 115mm 159mm FRONT VIEW ARM TYPE SIGNAL POST END RED BS 381C shade mm 152mm BLACK SIGNAL POST END WHITE BACK VIEW ARM TYPE Tolerance on all dimensions: ± 5% Figure 6 Semaphore shunting signals Semaphore shunting signals shall comply with standard performance category 3 (see Appendix C). Page 18 of 72

19 Semaphore shunting signals shall display only the ON and OFF aspects, as set out in Table 9. Aspect Description MA information a) Disc with red bar horizontal (+5 o /-5 o ) or Red and white horizontal (+5 o /-5 o ) arm b) Signal red light displayed (see Appendix A) #1 a) Disc turned 45 (+20 o /-10 o ) or Arm raised or lowered by angle of 45 (+20 o /-10 o ) b) Signal green light displayed (see Appendix A) #1 ON OFF End of MA Shunting MA #1 Not required where a semaphore disc is illuminated by floodlighting Table 9 Semaphore shunting signal ON and OFF aspects 2.3 Specification of route indicators Position light junction indicator Position light junction indicators shall only be provided in association with colour light signals (see 5.1.1) Position light junction indicators shall display the indication of route by means of either: a) A line of five lunar white light points (see Appendix A) orientated as shown in Figure 7, or b) A bar of light, as shown in Figure Max. 704 Min between centreline of lenses Position 1 (45 o ) 600 Min 176 Min Position 4 (45 o ) Position 2 (90 o ) Position 5 (90 o ) Position 3 (135 o ) Position 6 (135 o ) All dimensions are in millimetres Figure 7 Position light junction indicator using five lunar white lights (example shows position 1) Page 19 of 72

20 Position 1 (45 o ) 600 Min 176 Min Position 4 (45 o ) Position 2 (90 o ) Position 5 (90 o ) Position 3 (135 o ) Position 6 (135 o ) All dimensions are in millimetres Figure 8 Position light junction indicator using a bar of light (example shows position 1) Position light junction indicators shall be positioned either above or to one side of the associated colour light signal head to provide the required signal sighting and readability of the combined signal aspects and route indications The separation distance between an illuminated signal light and the nearest lunar white light or bar of light point shall be 550 mm (minimum) and 1230 mm (maximum) Where position light junction indicators are provided for more than one diverging route, they shall be orientated according to the order in which the divergences occur in the manner set out in Figure 9, commencing on each side at positions 1 and 4, as set out in Table 10. Signal Position light junction indication Route information ON None No MA OFF None MA for straight-ahead route OFF Position 1 MA for divergence to left OFF Position 2 MA for divergence to left more extreme than that for position 1 indication OFF Position 3 MA for divergence to left more extreme than that for position 2 indication OFF Position 4 MA for divergence to right Page 20 of 72

21 Signal Position light junction indication Route information OFF Position 5 MA for divergence to right more extreme than that for position 4 indication OFF Position 6 MA for divergence to right more extreme than that for position 5 indication Table 10 Position light junction indicator: displayed route indications POSITION 3 POSITION 2 POSITION 1 NO INDICATION NO INDICATION POSITION 4 POSITION 5 POSITION 6 Figure 9 Orientation of position light junction indications relative to diverging routes Position light junction indicators shall comply with standard performance category 1 (see Appendix C) Alphanumeric route indicator (including ERTMS level 2 operated lines) The requirements for provision of route indicators at junction signals are set out in Alphanumeric route indicators shall display the indication of route in the form of an illuminated alphanumeric display, coloured signal white The alphanumeric character font shall approximate to Gill Sans light Alphanumeric route indicators shall display the indication of route using one or more of the following characters: A B C D E F G H K L M N O P R S T U V W X Y Z The following limitations on the form of alphanumeric indications shall be applied: a) O and V shall only be used in combination with other letters where it is necessary to describe a geographic meaning. b) When used in conjunction with a subsidiary signal, C and S shall be reserved for indicating the class of movement. Page 21 of 72

22 c) An alphanumeric route indication incorporating the letter X shall only be displayed in combination with main or shunting signal OFF aspects when the route is set towards a limit of shunt, or along a bi-directional line in the opposite direction to the normal flow of traffic. Where more than one such route exists, the X indication shall be qualified by a reference to the line concerned. d) Combinations BU, CD, RA and OFF shall not be used Where an alphanumeric indication uses more than one character, the minimum distance between the outermost points on adjacent characters shall be 20% of character height Standard alphanumeric route indicators shall comply with standard performance category 2 (see Appendix C) Miniature alphanumeric route indicators shall comply with standard performance category 3 (see Appendix C) Preliminary route indicator The requirements for provision of preliminary route indicators are set out in The displayed preliminary route indication shall be displayed in the form of a signal white illuminated arrow against a black background, as set out in Table 11. Indication Route information Indication Route information Junction signal is displaying the ON aspect Junction signal is displaying an OFF aspect for the straight-ahead route No indication Junction signal is displaying an OFF aspect for a divergence to the left Position 0 Junction signal is displaying an OFF aspect for a divergence to the right Position 1 Junction signal is displaying an OFF aspect for a divergence to the left more extreme than position 1 Position 4 Junction signal is displaying an OFF aspect for a divergence to the right more extreme than position 4 Position 2 Position 5 Page 22 of 72

23 Indication Route information Indication Route information Table 11 Position 3 Junction signal is displaying an OFF aspect for a divergence to the left more extreme than position 2 Position 6 Preliminary route indicators: displayed indications Junction signal is displaying an OFF aspect for a divergence to the right more extreme than position Only one preliminary route indication shall be displayed at a time Preliminary route indicators shall comply with standard performance category 2 (see Appendix C). 2.4 Specification of lineside indicators Points indicator Points indicators shall be provided in accordance with Points indicators shall display the indications set out in Table 12. Indication Equipment status Signal red flashing light Signal red light (see ) Points not set No indication (see ) Signal yellow light Points are correctly set Table 12 Points indicator: displayed indications The indications displayed by points indicators in combination with a TPWS indicator and stop boards are set out in A points indicator that displays only a yellow light or a steady red light / yellow light shall only be provided on lines where it is necessary to display consistent indications along a line of route already fitted with this form of indication The points indicator red flashing light shall: a) Flash at a frequency of 120 (+/-6) cycles per minute, and b) Emit light for a nominal 100 ms of each flashing cycle Points indicators shall comply with (see Appendix C): a) Standard performance category 3 for the yellow indication, and b) 600 m readability distance for the steady or flashing red light. Page 23 of 72

24 2.4.2 Driver s level crossing indicator (including ERTMS operated lines) The requirements for provision of driver s level crossing indicators are set out in GK/RT Drivers level crossing indicators shall display the indications set out in Table 13. Indication Equipment status Remarks Signal red flashing light Signal white flashing light Level crossing equipment is not operating correctly Level crossing equipment is correctly operating Not provided where the level crossing indication is displayed at a stop board (see 2.4.8) Table 13 Driver s level crossing indicator: displayed indications The indications displayed by drivers level crossing indicators associated with a TPWS indicator at a stop board are set out in The driver s level crossing indicator red flashing light shall: a) Flash at a frequency of 120 (+/-6) cycles per minute, and b) Emit light for a nominal 100 ms of each flashing cycle The driver s level crossing indicator white flashing light shall: a) Flash at a frequency of 60 (min) to 90 (max) cycles per minute, and b) Have a mark:space ratio that provides visibility of the signal light for 50% - 66% of each flashing cycle when observed in accordance with standard performance category 1 (see Appendix C) Drivers level crossing indicators shall comply with: a) Standard performance category 1 for the white flashing light, and b) 600 m readability distance for the red flashing light (see Appendix C) Loading / unloading indicator The requirements for provision of loading / unloading indicators are set out in Loading / unloading indicators shall display the indications set out in Table 14. Indication MA information Indication MA information One signal white light between two signal red lights The operator requires the train to stop white lights vertically aligned The operator requires the train to move slowly in the normal direction for loading or unloading Page 24 of 72

25 Indication MA information Indication MA information white lights angled at 45 o to horizontal The operator requires the train to prepare to stop Indicators are not in use flashing white lights angled at 45 o to horizontal The operator requires the train to move slowly in the opposite direction to that required for loading or unloading No displayed indication Table 14 Loading / unloading indicator: displayed indications Each loading / unloading indicator shall display only one of the permitted indications at a time The loading / unloading indicator flashing aspect shall: a) Flash at a frequency of 60 (+/-10) cycles per minute, and b) Have a mark:space ratio that provides visibility of the signal light for 50% - 66% of each flashing cycle when observed in accordance with standard performance category 3 (see Appendix C) Loading / unloading indicators shall comply with standard performance category 3 (see Appendix C) SPAD indicator SPAD indicators shall only be provided as a means of mitigating the consequence of a signal passed at danger (SPAD) (see GI/RT7006) SPAD indicators shall display the indications set out in Table 15. Indication Description MA information One steady signal red light vertically aligned between two signal red flashing lights Table 15 The signal to which the SPAD indicator applies has been passed without authority Train has passed the end of movement authority No indication No SPAD detected No SPAD detected SPAD indicator: displayed indications Page 25 of 72

26 The two flashing red lamps shall: a) Flash in synchronism at a frequency of 60 (+/-10) cycles per minute, and b) Have a mark:space ratio that provides visibility of the illuminated indication for 50% - 66% of each flashing cycle when observed by a driver The SPAD indicator assembly shall comply with the format and dimensions shown in Figure SPAD indicators shall comply with standard performance category 2 and be capable of attracting the driver s attention: a) When it is on the periphery of a driver s vision at angles to the centre line of 30 o. b) At a distance of 100 m. c) In an environment with other bright background lights. Figure 10 SPAD indicator Where provided, SPAD indicators shall be positioned and aligned so that drivers approaching the point of conflict have a clear view of the indicator and have the greatest opportunity of stopping the train before the point of conflict is reached OFF indicator (including ERTMS level 2 operated lines) OFF indicators shall be provided at stations in accordance with GE/RT OFF indicators shall only display the indications set out in Table 16. Page 26 of 72

27 Indication Operational information Associated signal is displaying an ON aspect UP DN Table 16 OF OFF OFF OFF indicator: displayed indications Associated signal is displaying an OFF aspect The associated up direction signal is displaying an OFF aspect The associated down direction signal is displaying an OFF aspect The illuminated OFF indication shall be coloured signal white The character font shall approximate to Gill Sans light Where lineside signals are provided, an OFF indicator shall display the relevant OFF indication only when the signal(s) to which it applies is displaying an OFF aspect. No indication shall be displayed at all other times In ERTMS operated areas, an OFF indicator shall display 'OFF' only when a train has confirmed that it has received an in-cab movement authority to pass the node to which the OFF indicator applies. No indication shall be displayed at all other times OFF indicators shall comply with standard performance category 5 (see Appendix C) CD indicator and RA Indicator (including ERTMS level 2 operated lines) CD and RA indicators shall be provided at stations in accordance with GE/RT A self-restoring, secure operating device shall be provided for use by train dispatchers The indicator shall display the relevant indication only when the associated control device has been operated In ERTMS operated areas, a right away indicator shall display 'RA' only when a train has confirmed that it has received an in-cab movement authority to pass the node to which the right away indicator applies CD and RA indicators shall only display the relevant indications set out in Table 17. Indication CD RA Operational information Station operations are not complete CLOSE DOORS RIGHT AWAY Table 17 CD and RA indicators: displayed indications Page 27 of 72

28 Where a CD indicator is provided in conjunction with an RA indicator, the RA indication shall supersede the CD indication The illuminated indication shall be coloured signal white The character font shall approximate to Gill Sans light CD indicators and RA indicators shall comply with standard performance category 5 (see Appendix C) BU indicator BU indicators shall be provided in accordance with GK/RT Where provided, BU indicators shall be positioned at a distance beyond the level crossing, so that the BU indication is displayed before the front of the train that has passed over the level crossing passes the BU indicator BU indicators shall only display the indications set out in Table 18. Indication BU Equipment status information The level crossing opening sequence has not operated BARRIERS UP Table 18 BU indicators: displayed indications BU indicators shall display BU only when the associated level crossing barriers are fully raised. No indication shall be displayed at all other times The illuminated indication shall be coloured signal white The character font shall approximate to Gill Sans light BU indicators shall comply with standard performance category 5 (see Appendix C) Train Protection and Warning System (TPWS) indicator Where a TPWS indicator is required at a stop board, it shall be positioned either: a) Underneath the relevant stop board so that it is readable from the driving cab, or b) Remotely from the stop board; only where drivers are required to leave the driving cab to operate signalling equipment (for example, associated with driver operated token exchange equipment) TPWS indicators shall only display the indications set out in Table 19. Indication Steady signal blue light #1 Flashing signal blue light No indication #1 Normal state when no train is present Equipment status information TPWS intervention set TPWS disarmed TPWS failed Table 19 TPWS indications Page 28 of 72

29 The TPWS indicator blue flashing light shall: a) Flash at a frequency of 120 (+/-6) cycles per minute, and b) Emit light for a nominal 100 ms of each flashing cycle TPWS indicators shall comply with standard performance category 3 (see Appendix C) Where a TPWS indicator at a stop board is combined with a points indicator (for example, at the exit of a passing loop on a single line operated using the nosignaller token remote block system), the points indicator shall be positioned next to the TPWS indicator, so that the points indication is closest to the driver s line of sight Where a TPWS indicator at a stop board is associated with a points indicator and a driver s level crossing indicator: a) The points indicator shall be positioned next to the TPWS indicator, so that the points indication is closest to the driver s line of sight, and b) The driver s level crossing indicator shall be positioned adjacent to the stop board separately from the points / TPWS indication so that concurrently displayed indications are both readable as separate indications Where a TPWS indication is associated with a points indicator and / or a level crossing indicator: TPWS indicator Steady blue (#1) Steady blue (#1) a) The combinations of displayed indications shall comply with Table 20, and b) The indications shall be consistently displayed in a logical sequence at each location along a line of route. Points indicator LC indicator Equipment status information No indication No indication TPWS intervention set LC not operating No indication Flashing white TPWS intervention set LC correctly operating No indication Flashing red No indication Points not set (or points moving) LC not operating Flashing blue No indication No indication TPWS disarmed LC not operating Flashing blue No indication Flashing white No indication Flashing red Flashing white TPWS disarmed LC correctly operating Points not set (points moving) LC correctly operating Page 29 of 72