Lineside Signal Aspect and Indication Requirements

Lineside Signal Aspect and Indication Requirements Synopsis This document mandates the appearance of lineside signalling system displays and the information they convey. 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 2014 Rail Safety and Standards Board Limited

record Date Comments December 2014 Original document. Superseded documents Supply This standard is the result of an analysis of technical compatibility between lineside signalling systems and train operations. The requirements set out in this standard are consistent with the development of products that are capable of being interpretable, which is a pre-requisite of obtaining an authorisation for placing a new or modified lineside signalling system into service. The following is superseded, either in whole or in part as indicated: Superseded documents Sections superseded Date when sections are superseded GK/RT0045 issue three Lineside Signals, Indicators and Layout of Signals 2.1.1a; 2.1.1b; 2.1.2; 2.2.1.1; 2.2.1.2a; 2.2.1.2b; 2.2.1.3a; 2.2.1.3b; 2.2.1.4a; 2.2.1.4b; 2.2.1.4c; 2.2.1.4d; 2.2.2.2; 2.2.4.7; 2.2.4.8; 2.2.5.3; 2.2.5.5; 2.2.5.6; 2.2.5.8a; 2.2.5.8b; 2.2.6.1; 2.2.6.5; 2.2.6.6; 2.2.6.9; 2.2.7.2; 2.2.7.5; 2.2.8.3; 2.2.8.5; 2.3.1.1; 2.3.1.5; 2.3.2.5; 2.3.3.2; 2.3.3.3; 2.4.1.2; 2.4.2.2; 2.4.3.2; 2.4.5.2; 2.4.6.5; 2.4.6.6; 2.4.7.3; 2.4.8.2; 2.4.8.7a; 2.4.8.7b; 2.5.1.1a; 2.5.1.1b; 2.5.2.1; 2.5.3.1a; 2.5.3.1b; 4.1.8; 7.1.1; 7.2.1; 7.3.1; 7.3.2 07 March 2015 GK/RT0045 issue three Lineside Signals, Indicators and Layout of Signals, ceases to be in force and is withdrawn as of 07 March 2015. The authoritative version of this document is available at www.rgsonline.co.uk. Uncontrolled copies of this document can be obtained from Communications,, Block 2, Angel Square, 1 Torrens Street, London EC1V 1NY, telephone 020 3142 5400 or e-mail enquirydesk@rssb.co.uk. Other Standards and associated documents can also be viewed at www.rgsonline.co.uk. Page 2 of 37

Contents Section Description Page Part 1 Purpose and Introduction 5 1.1 Purpose 5 1.2 Introduction 5 1.3 Approval and authorisation of this document 5 Part 2 Requirements for 6 2.1 Signal aspect and appearance 6 2.2 Signal aspect and combinations 7 2.3 Signal aspect and route combinations 8 2.4 Signal aspects and supplementary combinations 9 Part 3 Application of this document 10 3.1 Scope 10 3.2 Exclusions from scope 10 3.3 General compliance date 10 3.4 Exceptions to general compliance date 10 3.5 Health and safety responsibilities 11 Appendices Appendix A Information Conveyed by Lineside Signals 12 Appendix B Information Conveyed by Route Indicators 27 Appendix C System Status Information Conveyed by Lineside Indicators 30 Appendix D Operational Information Conveyed by Lineside Indicators 33 Definitions 35 References 37 Tables Table 1 Displays that convey signalling information 6 Table 2 Signal aspects that use display combinations 7 Table 3 Permitted signal aspect and route combinations 8 Table 4 Signal aspect and supplementary display combinations 9 Table A.1 Stop aspects 12 Table A.2 Shunting conditional stop aspects 13 Table A.3 Shunt aspects 13 Table A.4 Calling-on aspects 14 Table A.5 PoSA aspects 15 Table A.6 Cautionary aspects in 3-aspect TCB signalling areas 15 Table A.7 Preferred cautionary aspects in 4-aspect TCB signalling areas 16 Table A.8 Non-preferred cautionary aspects in 4-aspect TCB signalling areas 16 Table A.9 TCB unrestricted proceed-aspects 17 Table A.10 Distant signal aspects 18 Table A.11 Home signal and non-block stop signal OFF aspects 19 Table A.12 Section signal and intermediate block home signal OFF aspects 20 Table A.13 Junction approach flashing cautionary aspects 21 Table A.14 Junction approach splitting cautionary and unrestricted proceed-aspects 23 Table A.15 Banner repeater s 23 Page 3 of 37

Table A.16 Splitting banner repeater s 26 Table B.1 Junction s 27 Table B.2 Preliminary junction s 28 Table B.3 Alphanumeric route s 29 Table C.1 Locally monitored infrastructure not operated 30 Table C.2 Facing points set 30 Table C.4 Locally monitored level crossing s 31 Table C.4 TPWS s 31 Table C.5 Mechanical trip-cock test s 32 Table D.1 Train dispatch s 33 Table D.2 Loading / unloading s 34 Page 4 of 37

Part 1 Purpose and Introduction 1.1 Purpose 1.1.1 This document mandates requirements for lineside signal aspects and s and the information that they are used to convey. 1.2 Introduction 1.2.1 Background 1.2.1.1 Lineside signalling systems are provided by infrastructure managers to convey the following types of information to authorised users involved with train operations: a) Movement authority information. b) Routing information. c) Permissible speed information. d) Locally monitored infrastructure status information. e) Operating instructions. 1.2.1.2 The information is conveyed in the form of signal aspects, route s, lineside operational signs and other signalling s. Authorised users read the information being conveyed on the basis of the appearance of what is being displayed. 1.2.1.3 This document specifies the appearance and information conveyed by lineside signal aspects and s so that they are interpretable and therefore compatible with the requirement that an authorised user should be able to understand the information being conveyed. 1.2.1.4 The scope of this document does not include compatibility of lineside signal aspects and s with train driving processes when an in-cab signalling system is in use. 1.2.2 Related requirements in other documents 1.2.2.1 The following contains requirements that are relevant to the scope of this document: GK/RT0070 GE/RT8102 Signalling Layout Design Requirements [in preparation, will replace some parts of GK/RT0045] Signalling Layout Driveability Assessment Requirements [in preparation, will replace some parts of GK/RT0045] 1.2.3 Supporting documents 1.2.3.1 The following Rail Industry Guidance Note supports this : GK/GN0658 Guidance on Indication Requirements 1.3 Approval and authorisation of this document 1.3.1 The content of this document was approved by Control Command and Signalling (CCS) Standards Committee on 16 October 2014. 1.3.2 This document was authorised by on 24 October 2014. Page 5 of 37

Part 2 Requirements for 2.1 Signal aspect and appearance 2.1.1 Each lineside signal shall continuously present the relevant signal aspect, except where the signal is configured with approach lighting functionality. 2.1.2 A signal shall be configured with approach lighting functionality only if both of the following criteria apply: a) The signal does not contribute to the overall readability of signals on other lines. And b) The relevant signal aspect is readable whenever the signal is approached by a train on the line to which it applies. 2.1.3 The interruption of signal aspects and s that are not designed to flash shall not exceed a single period of 250 ms in any one hour. 2.1.4 Signalling information shall be conveyed using only the signal aspects and s set out in Table 1. Type of information being conveyed Movement authority (MA) Conveyed by Clause or Table reference Individual displays Signal aspect Tables A.1 to A.14 2.2 Display combinations Repeat MA Banner repeater Table A.15 Not applicable Routing Junction Table B.1 Alphanumeric Table B.3 Repeat routing Preliminary junction Table B.2 Not applicable MA + routing Repeat MA + routing Locally monitored system status Operating instruction Table 1 Semaphore junction signal OFF aspect Tables A.9, A.11 and A.12 Flashing signal aspect Table A.13 Not applicable Splitting distant signal aspect Not applicable Table A.14 Splitting banner repeater 2.3 2.2 Not applicable Table A.16 Coloured light signalling Tables C.1 to C.5 Alphanumeric Coloured light signalling Alphanumeric Displays that convey signalling information Tables D.1 and D.2 2.4 Page 6 of 37

2.2 Signal aspect and combinations 2.2.1 Signal aspect combinations shall be presented only in accordance with Table 2. Signal aspect type Subsidiary position light signal OFF aspects Splitting distant signal aspects Semaphore main stop and distant signal arm combinations Semaphore main and subsidiary signal arm combinations Semaphore junction signal arm combinations Co-acting signal aspects Table 2 Display combination requirements A position light signal aspect presented with a colour light signal red aspect or stop board, as set out in A.3, A.4 or A.5. Two colour light signal aspects presented together, as set out in A.13. The distant arm shall: a) Be positioned below the associated main stop arm and on the same signal post. And b) Be presented in the OFF position only when the associated main stop arm is also presented in the OFF position. The calling-on (subsidiary) arm shall: a) Be mounted below the associated main stop arm (and where provided, the associated distant arm), and on the same signal post. And b) Be presented in the OFF position only when the associated main stop arm is in the ON position. As set out in 2.2.2 and 2.2.3. Duplicated signal aspects. Signal aspects that use display combinations 2.2.2 Semaphore junction signals that convey routing information using stepped, multiple stop arms shall meet the following principles: a) A separate stop arm shall be provided for each route. b) The relative horizontal position of each stop arm shall correspond with the direction of the applicable diverging route relative to the other signalled routes beyond the junction. c) The uppermost stop arm shall apply to the route with the highest permissible speed. d) The relative vertical position of the other stop arms shall correspond with the relative permissible speed on each diverging route. 2.2.3 Semaphore junction signals that convey routing information using stacked, multiple stop arms or discs shall meet the following principles: a) A separate stop arm or disc shall be provided for each route. b) The uppermost stop arm or disc shall correspond with the most extreme lefthand route. Page 7 of 37

c) The relative vertical position of each additional stop arm or disc shall correspond with the extent of the divergence from left to right. 2.3 Signal aspect and route combinations 2.3.1 Junction signal aspect and route combinations shall be presented only in accordance with Table 3. Junction signal type Junction signal aspect type All junction signals Stop aspect None Permitted route type Colour light signal Proceed-aspect Junction Colour light signal Proceed-aspect Alphanumeric Colour light signal Proceed-aspect Junction and Alphanumeric Semaphore signal Proceed-aspect Alphanumeric (#3) Independent or subsidiary position light signal #1 See 2.3.2; #2 See 2.3.3; #3 See 2.3.4 Table 3 Proceed-aspect Alphanumeric (#3) Permitted signal aspect and route combinations 2.3.2 A route and stop aspect combination shall be presented only for route -proving purposes immediately before the proceed-aspect is presented. 2.3.3 A route shall not be presented in combination with any of the following signal displays: a) Flashing single yellow. b) Flashing double yellow. c) Any splitting distant signal aspect where both signal heads are illuminated. 2.3.4 When an alphanumeric route is presented by a main stop signal that also incorporates a subsidiary signal aspect (unless the exception set out in 2.3.5 applies): a) The alphanumeric route s presented with main proceed-aspects shall be displayed in a different position to any alphanumeric route s presented with the subsidiary aspect. And b) Any alphanumeric route s presented with the subsidiary aspect shall appear to be at least 50% smaller than the alphanumeric route s presented with the main proceed-aspects. Page 8 of 37

2.3.5 A main stop signal shall present alphanumeric route s that have a similar size and positional relationship with the main and subsidiary aspects only if the following criteria apply: a) Physical environment and structure gauge limitations mean that compliance with 2.3.4 is not feasible. And b) A signal sighting assessment confirms that sufficient mitigation will be available to control the risk from a driver misreading the MA. 2.4 Signal aspects and supplementary combinations 2.4.1 Signal aspect and supplementary combinations shall be presented, only as set out in Table 4. Signal type Signal aspect Permitted supplementary Stop signal (excluding stop board) All stop signals Isolated distant signal Stop aspect 'TT' None Proceed-aspect Banner repeater ON aspect None CD or RA Loading / unloading Flashing white light CD or RA Additional permitted supplementary None None Banner repeater OFF aspect 'CD' or 'RA' None Stop board Stop aspect Flashing red light Steady yellow light Steady blue light Flashing blue light Flashing white light #1 Where both s are presented at the same signal, the RA shall supersede the CD #2 The stop board shall also present wording to convey any relevant operating instructions Table 4 Signal aspect and supplementary display combinations Page 9 of 37

Part 3 Application of this document 3.1 Scope 3.1.1 The requirements of this document apply to all work that affects lineside signal aspects and s, whether new or alteration. 3.1.2 Where infrastructure is subject to modification or upgrade and the nature of the modification or upgrade provides a reasonable opportunity to bring the infrastructure into conformity, then the requirements of this document applicable to the alteration apply. 3.1.3 Action to bring existing lineside signal aspects and s into compliance with the requirements of this document [or part of document] is not required. 3.1.4 Action to bring existing lineside signal aspects and s into compliance is required when that part of the lineside signalling system is modified or renewed as a whole. 3.2 Exclusions from scope 3.2.1 The requirements in this standard are not applicable where an in-cab signalling system is in use. 3.3 General compliance date 3.3.1 This comes into force and is to be complied with from 07 March 2015. 3.3.2 After the compliance date, or the date by which compliance is achieved, if earlier, compliance with the requirements set out in this is to be maintained. Where it is considered not reasonably practicable to comply with the requirements, permission to comply with a specified alternative should be sought in accordance with the s Code. 3.4 Exceptions to general compliance date 3.4.1 There are no exceptions to the general compliance date specified in 3.3. 3.4.2 It is permissible to designate specific infrastructure projects, at an advanced stage of development when this document comes into force, for which compliance with the requirements of this document applicable to the design, construction and commissioning of new or altered infrastructure is not mandatory. When designating such projects, the following shall be considered: a) Its responsibilities under its current safety authorisation. b) The stage reached by the project at the time this document comes into force (for example, approval in principle). c) Whether compliance is necessary to ensure compatibility with other parts of the infrastructure. d) Whether compliance is necessary to facilitate the safe working of the railway system having regard to changes to related requirements mandated on another infrastructure manager or a railway undertaking. e) The economic impact of compliance, but subject to its current safety authorisation in relation to the infrastructure in question. Page 10 of 37

3.4.3 Where any designations are made for infrastructure projects, those projects shall continue to meet the equivalent requirements in the RGSs applying to the project before the designation. 3.5 Health and safety responsibilities 3.5.1 Users of documents published by are reminded of the need to consider their own responsibilities to ensure health and safety at work and their own duties under health and safety legislation. does not warrant that compliance with all or any documents published by is sufficient in itself to ensure safe systems of work or operation or to satisfy such responsibilities or duties. Page 11 of 37

Appendix A Information Conveyed by Lineside Signals The content of this appendix is mandatory A.1 Limit of MA Colour light signal head generating the red display Semaphore main stop arm horizontally aligned (+5 o, -5 o ) and a red signal light Stop board Stop Main stop aspect Limit of MA Retro-reflective buffer beam in combination with two buffer-stop lights vertically aligned Independent position light signal generating the PLS red ON display Semaphore miniature stop arm horizontally aligned (+5 o, -5 o ) and a red signal light Semaphore shunting disc horizontally aligned (+5 o, -5 o ) and a red signal light #1 Buffer-stop lights coloured either signal red or signal white Table A.1 Stop aspects Shunting stop aspect Page 12 of 37

A.2 Limit of MA on the signalled route MA information Limit of MA for train movements towards a signalled line Independent position light signal generating the PLS yellow ON display Non-preferred Shunting conditional stop aspect Table A.2 Shunting conditional stop aspects A.3 Shunting MA Independent position light signal generating the PLS steady OFF display Shunting MA. The line ahead might be occupied. Semaphore shunting disc aligned at 45 o (+20 o, -10 o ) above or below horizontal and a green signal light (upper quadrant is shown) Semaphore miniature stop arm aligned at 45 o (+20 o, -10 o ) above or below horizontal and a green signal light (upper quadrant is shown) Shunt aspect Shunting MA. The line ahead might be occupied. A position light signal generating PLS steady OFF display in combination with a colour light signal head generating the red display A position light signal generating PLS steady OFF display in combination with a stop board Stop #1 Section 2.2 sets out further requirements for conveying routing information using multiple semaphore signal arms and discs Table A.3 Shunt aspects Page 13 of 37

A.4 Calling on MA A position light signal generating PLS steady OFF display in combination with a colour light signal head generating the red display Calling-on MA. The line ahead is occupied. A semaphore calling-on arm aligned at 45 o (+20 o, -10 o ) above or below horizontal and a green signal light positioned below a semaphore main stop arm horizontally aligned (+5 o, -5 o ) and a red signal light (upper quadrant is shown) Calling-on aspect Table A.4 Calling-on aspects Page 14 of 37

A.5 Proceed-on-Sight Authority (PoSA) MA Proceed-on-sight authority (PoSA) MA A position light signal generating PLS flashing OFF display in combination with a colour light signal head generating the red display Subsidiary PoSA aspect A position light signal generating PLS flashing OFF display Independent PoSA aspect #1 Flashing aspect parameters: a) Flashing rate: 60 cycles per minute (+/-10). b) Flashing pattern: i) Lit for 50% - 66% of each flashing cycle. ii) Flashing cycles shall be of equal length. iii) Multiple display elements flash synchronously. Table A.5 PoSA aspects A.6 Cautionary MA in 3-aspect track circuit block (TCB) signalling areas signal section is clear. Signalling braking distance is available. A colour light signal head generating the single yellow display A fixed distant board 3-aspect caution Table A.6 Cautionary aspects in 3-aspect TCB signalling areas Page 15 of 37

A.7 Cautionary MA in 4-aspect TCB signalling areas (preferred) Two signal sections are clear. Signalling braking distance is available. signal section is clear. At least 33% signalling braking distance is available. Table A.7 A colour light signal head generating the double yellow display A colour light signal head generating the single yellow display Preferred cautionary aspects in 4-aspect TCB signalling areas 4-aspect first caution 4-aspect single yellow caution A.8 Cautionary MA in 4-aspect TCB signalling areas (non-preferred) (#1 or #2) Three signal sections are clear. Signalling braking distance is available. Two signal sections are clear. Less than signalling braking distance is available. Two signal sections are clear. At least 33% signalling braking distance is available. signal section is clear. Less than 33% signalling braking distance is available. A colour light signal head generating the double yellow display A colour light signal head generating the single yellow display #1 Part of YY YY Y R cautionary aspect sequence #2 Part of YY Y Y R cautionary aspect sequence Table A.8 Non-preferred cautionary aspects in 4-aspect TCB signalling areas Non-preferred 4-aspect first caution Non-preferred 4-aspect additional double yellow caution Non-preferred 4-aspect single yellow caution Non-preferred 4-aspect closing-up single yellow caution Page 16 of 37

A.9 Unrestricted MA in TCB signalling areas Line clear. A colour light signal head generating the green display Semaphore main stop arm aligned at 45 o (+20 o, -10 o ) above or below horizontal and a green signal light (upper quadrant is shown) #1 Section 2.2 sets out further requirements for semaphore junction signal OFF aspects TCB unrestricted proceed-aspect Table A.9 TCB unrestricted proceed-aspects Page 17 of 37

A.10 MA information conveyed by distant signal ON and OFF aspects A colour light signal head generating the double yellow display End of MA at the associated home signal or non-block stop signal. Signalling braking distance is available. A colour light signal head generating the single yellow display Semaphore distant arm horizontally aligned (+5 o, -5 o ) and a yellow signal light Distant ON aspect A fixed distant board All associated stop signals are OFF. Next block or token section is clear, or the next signal is a non-block stop signal displaying a proceed aspect. A colour light signal head generating the green display Semaphore distant arm aligned at 45 o (+20 o, -10 o ) above or below horizontal and a green signal light (upper quadrant is shown) Distant OFF aspect (#3) #1 Except for repeat distant ON aspects #2 Includes intermediate block distant ON aspect #3 Includes intermediate block distant OFF aspect Table A.10 Distant signal aspects Page 18 of 37

A.11 MA information conveyed by home signal aspects and non-block stop signal aspects signal section is clear. Semaphore main stop arm aligned at 45 o (+20 o, -10 o ) above or below horizontal and a green signal light (upper quadrant is shown) Semaphore home signal OFF aspect Non-block semaphore stop signal OFF aspect signal section is clear. A colour light signal head generating the single yellow display Colour light home signal yellow-off aspect Colour light nonblock yellow-off aspect All associated stop signals are OFF. A colour light signal head generating the green display #1 Section 2.2 sets out further requirements for semaphore junction signal OFF aspects Colour light home signal green-off aspect Colour light nonblock green-off aspect Table A.11 Home signal and non-block stop signal OFF aspects Page 19 of 37

A.12 MA information conveyed by section signal aspects and intermediate block home signal aspects Block, token or one-train staff section is clear. Semaphore main stop arm aligned at 45 o (+20 o, -10 o ) above or below horizontal and a green signal light (upper quadrant is shown) Section signal OFF aspect Intermediate block home signal OFF aspect Block, token or one-train staff section is clear as far as the home signal. Signalling braking distance is available. Block, token or one-train staff section is clear. A colour light signal head generating the single yellow display A colour light signal head generating the green display Colour light section signal yellow-off aspect (#3) Colour light home signal green-off aspect Intermediate block home signal OFF aspect #1 Electric token block systems and one-train staff systems additionally require the transfer of a token or staff as part of the MA #2 Section 2.2 sets out further requirements for semaphore junction signal OFF aspects #3 Also acts as a distant ON aspect Table A.12 Section signal and intermediate block home signal OFF aspects Page 20 of 37

A.13 Signal aspects that convey MA and routing information Non-permissive MA as far as the first signal beyond the junction. SBD is available to the junction signal. A colour light signal head generating the flashing double yellow display 4-aspect outer junction approach flashing caution The next junction signal is displaying a cautionary aspect for a diverging route. A colour light signal head generating the flashing single yellow display 3-aspect junction approach flashing caution Non-permissive MA as far as the first signal beyond the junction. SBD is available. At least 33% SBD is available to the junction signal. The next junction signal is displaying a cautionary aspect for a diverging route. A colour light signal head generating the flashing single yellow display 4-aspect inner junction approach flashing caution #1 Flashing aspect parameters: a) Flashing rate: 60 cycles per minute (+/-10). b) Flashing pattern: i) Lit for 50% - 66% of each flashing cycle. ii) Flashing cycles shall be of equal length. iii) The flashing double yellow aspect shall flash in synchronism. Table A.13 Junction approach flashing cautionary aspects Page 21 of 37

Two signal sections are clear. Signalling braking distance is available. Principal set. Splitting distant straight ahead caution righthand junction Splitting distant straight ahead caution lefthand junction Two signal sections are clear. Signalling braking distance is available. Left-hand diverging route set. Two signal sections are clear. Signalling braking distance is available. Right-hand diverging route set. Line clear. Principal set. Two colour light signal heads combined as a junction splitting distant signal Splitting distant left-hand junction caution Splitting distant right-hand junction caution Splitting distant straight ahead unrestricted proceed-aspect right-hand junction Splitting distant straight ahead unrestricted proceed-aspect left-hand junction Page 22 of 37

Line clear. Left-hand diverging route set. Line clear. Right-hand diverging route set. Splitting distant left-hand junction unrestricted proceed-aspect Splitting distant right-hand junction unrestricted proceed-aspect Table A.14 Junction approach splitting cautionary and unrestricted proceed-aspects A.14 Indications that repeat MA information The repeated signal is displaying a main stop aspect Banner repeater head displaying a horizontal banner arm against a white background Banner-ON The repeated signal is displaying a proceedaspect The repeated signal is displaying a cautionary aspect The repeated colour light signal is displaying a green aspect Banner repeater head displaying an upper quadrant banner arm against a white background Banner repeater head displaying an upper quadrant banner arm against a green background Banner white- OFF Banner green- OFF #1 2-state banner repeater indicators only #2 3-state banner repeater indicators only Table A.15 Banner repeater s Page 23 of 37

A.15 Indications that repeat MA and routing information Equal height splitting banner Equal height splitting banner- ON The repeated signal is displaying a main stop aspect. Two banner ONs presented side by side Equal height splitting banner- ON The repeated signal is displaying a proceedaspect. The left-hand route is set. The repeated signal is displaying a cautionary aspect. The left-hand route is set. The repeated colour light signal is displaying a green aspect. The left-hand route is set. A banner white-off positioned to the left-hand side of a banner-on A banner green-off positioned to the left-hand side of a banner-on Splitting white banner-off (equal height left hand) Splitting green banner-off (equal height left hand) Page 24 of 37

The repeated signal is displaying a proceedaspect. The right-hand route is set. The repeated signal is displaying a cautionary aspect. The right-hand route is set. The repeated colour light signal is displaying a green aspect. The right-hand route is set. The repeated signal is displaying a proceedaspect. The higher speed left-hand route is set. The repeated signal is displaying a cautionary aspect. The higher speed left-hand route is set. The repeated colour light signal is displaying a green aspect The higher speed left-hand route is set The repeated signal is displaying a proceedaspect. The higher speed righthand route is set. The repeated signal is displaying a cautionary aspect. The higher speed righthand route is set. A banner white-off positioned to the right-hand side of a banner-on A banner green-off positioned to the right-hand side of a banner-on A banner white-off positioned higher than and to the left-hand side of a banner-on A banner green-off positioned higher than and to the left-hand side of a banner-on A banner white-off positioned higher than and to the right-hand side of a banner-on Splitting white banner-off (equal height right hand) Splitting green banner-off (equal height right hand) Splitting white banner-off (stepped left hand, higher speed route) Splitting green banner-off (stepped left hand, higher speed route) Splitting white banner-off (stepped right hand, higher speed route) Page 25 of 37

The repeated colour light signal is displaying a green aspect. The higher speed righthand route is set. The repeated signal is displaying a proceedaspect. The lower speed left-hand route is set. The repeated signal is displaying a cautionary aspect. The lower speed left-hand route is set. The repeated colour light signal is displaying a green aspect. The lower speed left-hand route is set. A banner green-off positioned higher than and to the right-hand side of a banner-on A banner white-off positioned lower than and to the left-hand side of a banner-on A banner green-off positioned lower than and to the left-hand side of a banner-on Splitting green banner-off (stepped right hand, higher speed route) Splitting white banner-off (stepped left-hand route) Splitting green banner-off (stepped left-hand route) The repeated signal is displaying a proceedaspect. The lower speed right-hand route is set. The repeated signal is displaying a cautionary aspect. The lower speed right-hand route is set. The repeated colour light signal is displaying a green aspect. The lower speed right-hand route is set. A banner white-off positioned lower than and to the right-hand side of a banner-on A banner green-off positioned lower than and to the right-hand side of a banner-on #1 2-state splitting banner repeater indicators only #2 3-state splitting banner repeater indicators only Splitting white banner-off (stepped righthand route) Splitting green banner-off (stepped righthand route) Table A.16 Splitting banner repeater s Page 26 of 37

Appendix B Information Conveyed by Route Indicators The content of this appendix is mandatory B.1 Directional information The principal route is set No junction is presented The 1 st left-hand diverging route is set X denotes the PIVOT end X Position 1 junction The 2 nd left-hand diverging route is set X Position 2 junction The 3 rd left-hand diverging route is set An illuminated white bar of light X X Position 3 junction The 1 st right-hand diverging route is set X Position 4 junction The 2 nd right-hand diverging route is set X Position 5 junction The 3 rd right-hand diverging route is set X X Position 6 junction Table B.1 Junction s Page 27 of 37

The principal route is set at the next diverging junction The 1 st left-hand diverging route is set at the next diverging junction The 2 nd left-hand diverging route is set at the next diverging junction The 3 rd left-hand diverging route is set at the next diverging junction The 1 st right-hand diverging route is set at the next diverging junction The 2 nd right-hand diverging route is set at the next diverging junction The 3 rd right-hand diverging route is set at the next diverging junction An illuminated arrow Position 0 preliminary junction Position 1 preliminary junction Position 2 preliminary junction Position 3 preliminary junction Position 4 preliminary junction Position 5 preliminary junction Position 6 preliminary junction #1 No shall be presented when the junction signal is displaying a main stop aspect Table B.2 Preliminary junction s Page 28 of 37

B.2 Route and destination information The principal route is set No route is presented The route is set towards the indicated destination Any horizontally aligned combination of one, two or three upper case alphanumeric characters, as follows: Preferred: 0 1 2 3 4 5 6 7 8 9 A B C D E F G H K L M N P R S T U W Y Z M SDG (Examples only) Alphanumeric route Non-preferred: I J O V The route is set towards a limit of shunt or along a bidirectional line in the opposite direction to the normal flow of traffic X #1 Where a signal has more than one contra-direction route, the relevant alphanumeric route shall combine the letter X with one or two additional characters X Table B.3 Alphanumeric route s Page 29 of 37

Appendix C System Status Information Conveyed by Lineside Indicators The content of this appendix is mandatory C.1 Locally monitored infrastructure not operated Locally monitored infrastructure not operated A flashing red light Infrastructure not operated #1 Flashing parameters: a) Flashing rate: 120 cycles per minute (+/-6). b) Flashing pattern: i) Lit for nominal 20% of each flashing cycle. ii) Each flashing cycle of equal length. #2 Locally monitored infrastructure types include facing points and level crossings Table C.1 Locally monitored infrastructure not operated C.2 Locally monitored facing points status information Locally monitored points are correctly set A steady yellow light Facing points set Table C.2 Facing points set Page 30 of 37

C.3 Locally monitored level crossing status information Locally monitored level crossing operating correctly A flashing white light Level crossing operating Barriers are fully raised Alphanumeric BU Barriers Up #1 Flashing parameters: a) Flashing rate: 60-90 cycles per minute. b) Flashing pattern: i) Lit for 50% - 66% of each flashing cycle. ii) Each flashing cycle of equal length. #2 Absence of the implies that the level crossing has failed after passage of the train Table C.3 Locally monitored level crossing s C.4 TPWS status information TPWS intervention is set at the stop-board A steady blue light TPWS set TPWS is disarmed at the stop-board A flashing blue light TPWS disarmed TPWS has failed No presented #1 Flashing parameters: a) Flashing rate: 120 cycles per minute (+/-6). b) Flashing pattern: i) Lit for nominal 20% of each flashing cycle. ii) Each flashing cycle of equal length. Table C.4 TPWS s Page 31 of 37

C.5 Mechanical trip-cock system status information Trip-cock test underway Alphanumeric TT Trip-cock test Trip-cock test OK TT extinguishes Table C.5 Mechanical trip-cock test s Page 32 of 37

Appendix D Operational Information Conveyed by Lineside Indicators The content of this appendix is mandatory D.1 Train dispatch operation s The associated stop signal is displaying a proceed-aspect The train has an MA OFF Signal OFF Close doors Alphanumeric CD (#3) Close doors Right away RA (#3) Right away #1 In ETCS areas only, where the MA is not conveyed by a signal aspect #2 Presented either on its own or in combination with a signal identity or direction identity #3 Where an indicator displays CD and RA, the CD shall be presented first and the RA shall supersede the CD Table D.1 Train dispatch s D.2 Loading / unloading operational information Stop immediately Three red lights aligned horizontally Stop Prepare to stop Proceed forwards slowly Three white lights aligned at 45 o left hand raised Three white lights aligned vertically Position 1 shunting Position 0 shunting Page 33 of 37

Reverse slowly #1 Flashing parameters: Three flashing white lights aligned at 45 o right hand raised a) Flashing rate: 60 cycles per minute (+/-10). b) Flashing pattern: i) Lit for 50% - 66% of each flashing cycle. ii) iii) Flashing cycles shall be of equal length. Multiple display elements flash synchronously. Position 4 shunting Table D.2 Loading / unloading s Page 34 of 37

Definitions Aspect (See signal aspect). Authorised user A person authorised to carry out one or more operational roles defined in GE/RT8000 Rule Book. Authorised user roles include train driver, shunter, guard and platform staff. Display (noun) The overall appearance of the image generated by a lineside signalling product or feature. Diverging junction A type of junction incorporating one or more facing points ends where one signalled line splits into two or more separate signalled lines. Diverging route Any route at a diverging junction that is not designated as the principal route. Indication (See signal.) Interpret / interpreting (signalling system displays) The action of understanding the information conveyed by the signal aspect or after it has been read (for example, understanding that a red aspect means end of MA ). Interpretable (signalling system displays) The extent to which the information conveyed by a signal aspect or can be reliably interpreted, ranging from not interpretable to easily interpretable. Interpretability The ease and reliability with which signal aspects and s can be interpreted by an authorised user throughout the range of operational and ambient conditions applicable to that feature, within the operational context and while performing typical required duties. This ranges from never interpretable to always interpretable. Junction signal A main stop signal that protects a diverging junction. Lineside operational sign A sign, positioned at the lineside, that conveys information needed to support the train driving task. Lineside signalling system A system that is used to convey information about the movement authorities, routes, equipment status, operational information and permissible speeds in the form of lineside signal aspects, route s, signalling s and lineside signs. Locally monitored system / infrastructure A signalling system or train protection system that uses a lineside signalling to indicate its operational status to authorised users. Movement authority (MA) information Information conveyed by the lineside signalling system describing the permission for a particular train to run to a specific location within the constraints of the signalling system. Page 35 of 37

Operational information Operational information conveyed by the lineside signalling system describing an action to be taken by an authorised user. Principal route The signalled line beyond a diverging junction that has the highest permissible speed of all routes at the junction. Route A display of specified appearance that is used to conveying routing information to an authorised user. Route indicator A permanent, fixed feature of the lineside signalling system that is capable of displaying a route. Routing information Information conveyed by the lineside signalling system describing the route or destination that is associated with an MA. Sign A device that displays a fixed image or text, in order to convey specific information to the reader. Signal A permanent, fixed feature of the lineside signalling system that is capable of displaying a signal aspect. Signal aspect / A display of specified appearance that is used to convey a specific set of information to an authorised user. Signalling braking distance (SBD) The distance between the first signal exhibiting a cautionary aspect and the signal at which the train is required to stop. Signalling indicator A permanent, fixed feature of the lineside signalling system that is capable of displaying a signalling. System status information Information conveyed by the lineside signalling system concerning the operational status of a system or infrastructure feature that is designed to be monitored by authorised users. Un-signalled line The part of the railway that is operated without the use of lineside signals or indicators. Page 36 of 37

References The Catalogue of s gives the current issue number and status of documents published by. This information is also available from www.rgsonline.co.uk. RGSC 01 RGSC 02 s Code Standards Manual Documents referenced in the text s GE/RT8000 GE/RT8101 GK/RT0045 GK/RT0057 GK/RT0070 documents GK/GN0658 Rule Book Signal Sighting Assessment Requirements [in preparation, will replace GE/RT8037] Lineside Signals, Indicators and Layout of Signals Lineside Signal and Indicator Product Design and Assessment Requirements Signalling Layout Requirements [in preparation, will replace some parts of GK/RT0045] Guidance on Indication Requirements Page 37 of 37