Railway Group Standard Technical Requirements for Dispatch of Trains from Platforms Synopsis This document mandates the minimum technical requirements for the facilities used in dispatching trains from platforms. Signatures removed from electronic version Submitted by Brian Bashford Standards Project Manager Authorised by Anne E Blakeney Acting Controller, Railway Group Standards This document is the property of Rail Safety and Standards Board Limited. It shall not be reproduced in whole or in part without the written permission of the Controller, Railway Group Standards, Rail Safety and Standards Board. Published by: Rail Safety and Standards Board Evergreen House 160 Euston Road London NW1 2DX Copyright 2003 Rail Safety and Standards Board Limited
This page has been left blank intentionally
Railway Group Standard Page 1 of 20 Contents Section Description Page Part A A1 Issue record 2 A2 Implementation of this document 2 A3 Scope of Railway Group Standards 2 A4 Responsibilities 3 A5 Health and safety responsibilities 3 A6 Technical content 3 A7 Supply 3 Part B B1 Purpose 5 B2 Application of this document 5 B3 Definitions 6 Part C C1 Train dispatch information and general requirements 9 C2 Requirements for indicators 11 C3 Technical requirements for view by line of sight 12 C4 Technical requirements for station mirrors 12 C5 Technical requirements for station cameras and monitors 13 C6 Technical requirements for on-train cameras and monitors 14 C7 Technical requirements for station cameras and on-train monitors 15 Part D D1 Approval 17 D2 Maintenance 17 Appendices (nonmandatory) 1 Performance requirements for cameras and monitors used in train dispatch systems 18 2 Application guidelines for camera/monitor systems 19 References 20 RAIL SAFETY AND STANDARDS BOARD 1
Railway Group Standard Page 2 of 20 Document to be Withdrawn as of 04/09/2010 A1 Issue record Part A Issue Date Comments One June 2003 Original document. This document will be updated when necessary by distribution of a complete replacement. A2 Implementation of this document The publication date of this document is 7 June 2003. This document comes into force on 2 August 2003. The dates by which compliance with the requirements of this document is to be achieved are set out in Part B2. Where those dates are later than the date on which this document comes into force, this is to give Railway Group members additional time to plan and commence implementation so as to achieve full compliance by the dates set out in Part B2. This document supersedes the following Railway Group Standards either in whole or in part as indicated: Railway Group Standard/RAC OP Issue No. Title RGS/RACOP clauses superseded by this document Date(s) as of which clauses are superseded GM/TT0118 1 Driver Only Operated Passenger Trains Station Platform Lighting And Electrical Supplies GM/TT0162 1 Driver Only Operated Passenger Trains Technical Standard for Station Platform Mirrors GO/RT3205 1 Close Door (CD) Indicators at Platforms GT/EHH804 1 Closed Circuit Television for Driver Only Operation (Passenger) All All All All 2 August 2003. GM/TT0118 is withdrawn from this date. 2 August 2003. GM/TT0162 is withdrawn from this date. 2 August 2003. GO/RT3205 is withdrawn from this date. 2 August 2008. GT/EHH804 is withdrawn from this date. A3 Scope of Railway Group Standards The overall scope of Railway Group Standards is set out in Appendix A of GA/RT6001. The specific scope of this document is set out in Part B2. 2 RAIL SAFETY AND STANDARDS BOARD
Railway Group Standard Page 3 of 20 A4 Responsibilities Railway Group Standards are mandatory on all members of the Railway Group* and apply to all relevant activities that fall into the scope of each individual s Railway Safety Case. If any of those activities are performed by a contractor, the contractor s obligation in respect of Railway Group Standards is determined by the terms of the contract between the respective parties. Where a contractor is a duty holder of a Railway Safety Case then Railway Group Standards apply directly to the activities described in the Safety Case. * The Railway Group comprises Network Rail Infrastructure Limited, Rail Safety and Standards Board Limited, and the train and station operators who hold railway safety cases for operation on or related to infrastructure controlled by Network Rail Infrastructure Limited. Network Rail Infrastructure Limited is known as Network Rail. Rail Safety and Standards Board Limited is also known as RSSB. A5 Health and safety responsibilities A6 Technical content In issuing this document, RSSB makes no warranties, express or implied, that compliance with all or any documents published by RSSB is sufficient on its own to ensure safe systems of work or operation. Each user is reminded of its own responsibilities to ensure health and safety at work and its individual duties under health and safety legislation. The technical content of this document has been approved by: Haydn Peers, Principal Traction and Rolling Stock Engineer, RSSB Jeff Allan, Principal Signalling &Telecommunications Engineer, RSSB Enquiries should be directed to RSSB Tel: 020 7904 7518 A7 Supply Controlled and uncontrolled copies of this document may be obtained from the Industry Safety Liaison Dept, Rail Safety and Standards Board, Evergreen House, 160 Euston Road, London NW1 2DX. RAIL SAFETY AND STANDARDS BOARD 3
Railway Group Standard Page 4 of 20 Document to be Withdrawn as of 04/09/2010 This page has been left blank intentionally 4 RAIL SAFETY AND STANDARDS BOARD
Railway Group Standard Page 5 of 20 B1 Purpose B2 Application of this document Part B This document mandates the minimum technical requirements such that assurance is gained that it is safe to close the doors and start the train. B2.1 To whom the requirements apply This document contains requirements that are applicable to duty holders of the following categories of Railway Safety Case: a) infrastructure controller b) station operator c) train operator. Under the Railways (Safety Case) Regulations 2000, the duty holder at a station (as defined in those Regulations) is responsible for ensuring that the requirements of Railway Group Standards are complied with. At a station, contractual arrangements (including a lease) do not of themselves relieve the duty holder of his obligations under those Regulations. B2.2 Compliance requirements B2.2.1 Infrastructure The requirements of this document are mandatory for new infrastructure and for alterations to existing infrastructure for which approval in principle is signed off on or after 2 August 2003. When approval in principle is signed off before 2 August 2003, but the infrastructure (or infrastructure modification) has not yet been brought into service, the design shall be reviewed and, where reasonably practicable, brought into line with the requirements of this document. Where it is not reasonably practicable to do so, the situation shall be regularised by means of a noncompliance or derogation (see section B2.2.4). Compliance with the requirements of this standard is required by all schemes (irrespective of their approval in principle date) that are brought into service on or after 2 August 2004. The requirements of section D2 are applicable to new and existing equipment from 2 August 2003. B2.2.2 Stations The requirements of this document are mandatory for new stations and for alterations to existing stations for which design commences on or after 2 August 2003. When design commences before 2 August 2003, but the station (or station modification) has not yet been brought into service, the design shall be reviewed and, where reasonably practicable, brought into line with the requirements of this document. Where it is not reasonably practicable to do so, the situation shall be regularised by means of a non-compliance or derogation (see section B2.2.4). Compliance with the requirements of this standard is required by all schemes irrespective of their approval in principle date that are brought into service on or after 2 August 2004. The requirements of section D2 are applicable to new and existing equipment from 2 August 2003. B2.2.3 Trains The vehicle design requirements mandated in this document are to be complied with by all vehicles of previously uncertificated designs with a first Certificate of RAIL SAFETY AND STANDARDS BOARD 5
Railway Group Standard Page 6 of 20 Document to be Withdrawn as of 04/09/2010 Conformance for Vehicle Design signed on or after 2 August 2003. In addition to this the design requirements shall be complied with by any future vehicles, built to the same design as a vehicle already having Engineering Acceptance, which enter service on Network Rail controlled infrastructure on or after 2 August 2008. The requirements of sections C1.3, C6, D1.2 & D2(c) of this document are within the scope of Vehicle Acceptance Body approval. B2.2.4 General compliance requirements After the compliance dates, or after the date by which compliance is achieved (if earlier), Railway Group members shall not deviate from the requirements set out in this document. Where it is considered not reasonably practicable to comply with the requirements set out in this document, authorisation not to comply shall be sought in accordance with GA/RT6001, GA/RT6004 or GA/RT6006. B2.3 Related documents GO/RT3271 Driver Only Operation GO/RC3571 Driver Only Operation (Passenger) GC/RT5161 Station Design and Maintenance Requirements B3 Definitions Diversity The ratio of minimum to maximum illuminance over a specified surface. Horizontal illuminance The illuminance falling on a horizontal plane. Illuminance The luminous flux density at a surface in a defined plane. The SI unit of illuminance is the lux, which is equal to one lumen per square metre (lm.m -2 ). Luminaire An apparatus which controls the distribution of light given by a lamp or lamps and which includes all the components necessary for fixing and protecting the lamps and connecting them to the supply circuit. Maintained illuminance The average illuminance over the reference surface at the worst condition of maintenance. Platform edge area The area enclosed between the platform edge and a line 1.0 metre back from the platform edge, along the extent of the platform length to which Driver Only Operation (DOO) applies. Station work complete For the purposes of this document only, a condition in which the train doors are fully closed with all persons intending to travel safely on the train and all persons not intending to travel clear of the train. Target object For the purposes of this document only, an object which has a flat, rectangular area in the plane perpendicular to the direction of view. The area has a height of 1.0 metre, width of 0.5 metre, and has uniform colour grey to BS4800 Item 00A09 or BS381C Shade 693. Train dispatch Systems, equipment, procedures and instructions intended to ensure the safe departure of a train from a platform. 6 RAIL SAFETY AND STANDARDS BOARD
Railway Group Standard Page 7 of 20 Uniformity The ratio of the minimum to the average illuminance over a specified surface. Vertical illuminance The illuminance falling on a vertical plane. RAIL SAFETY AND STANDARDS BOARD 7
Railway Group Standard Page 8 of 20 Document to be Withdrawn as of 04/09/2010 This page has been left blank intentionally 8 RAIL SAFETY AND STANDARDS BOARD
Railway Group Standard Page 9 of 20 C1 Train dispatch information and general requirements Part C C1.1 Information on facilities used in permitted modes of train dispatch Section C1.1 is for information only and describes the circumstances under which the equipment (and other facilities) specified in this standard are used in practice. Permitted modes of train dispatch are set out in GO/RT3475 (scheduled to be published in December 2003). C1.1.1 Indicators Close Door (CD) and Right Away (RA) indicators are infrastructure-mounted and are operated by the person checking that the station duties are complete. C1.1.2 Line of sight Line of sight is used to directly view along the length of the train adjacent to the platform in order to determine the station work complete' condition. C1.1.3 Station mirrors Infrastructure-mounted mirrors are used to indirectly view along the length of the train adjacent to the platform in order to determine the station work complete' condition. C1.1.4 Infrastructure-mounted video camera/monitor systems An infrastructure-mounted video camera/monitor system is used to indirectly view the length of the train adjacent to the platform in order to determine the station work complete' condition. C1.1.5 On-train video camera/monitor systems A train-mounted video camera/monitor system is used to indirectly view the length of the train adjacent to the platform in order to determine the 'station work complete' condition. C1.1.6 Infrastructure-mounted video camera/on-train monitor systems An infrastructure-mounted video camera/on-train monitor system is used to indirectly view the length of the train adjacent to the platform in order to determine the station work complete' condition. C1.1.7 Train dispatch, by traditional methods The station work complete' condition is determined by platform or train staff. The driver is made aware of this condition by the use of flags (daylight), lamps (darkness), bells or buzzers. Detailed requirements are set out in Rule Book GO/RT3000 Section H. C1.2 Visual performance The requirements for train drivers visual performance are set out in GO/RT3251 and those for other staff involved in train working by GO/RT3255. C1.3 General requirements for trains a) The design of trains shall be such that their relevant features (cab window layout, in-cab lighting) are compatible with all train dispatch modes used by the train operator. b) It is permissible to use the livery of trains, for example on door edges, to enhance the ability to detect the station work complete condition. C1.4 General requirements for stations Requirements for the compatibility of dispatch arrangements between the infrastructure and trains are set out in GO/RT3475. RAIL SAFETY AND STANDARDS BOARD 9
Railway Group Standard Page 10 of 20 Document to be Withdrawn as of 04/09/2010 The use of coloured and/or hatched/marked areas on the platform edge area is permissible provided both the white edges and any stand-behind warning line are maintained and the hatched/marked areas do not detract from the intended purposes of either. All design figures of illuminance specified in this document are based on the maintained illuminance levels (see sections C1.6, C1.8 and D1.1). All maintained illuminance levels shall be determined without the presence of trains in platforms. C1.5 Lighting requirements for DOO stations (mirrors and driver line of sight only) C1.5.1 Minimum permitted horizontal illuminance The illuminance on the total of the platform edge area shall be greater than or equal to 20 lux at platform level. C1.5.2 Uniformity of horizontal illuminance open platform The uniformity of horizontal illuminance along the platform edge area on the open platform shall be greater than or equal to 0.4. C1.5.3 Uniformity of horizontal illuminance covered platform The uniformity of horizontal illuminance along the platform edge area under covered areas shall be greater than or equal to 0.2. C1.5.4 Diversity of horizontal illuminance The diversity at the platform edge area shall be greater than or equal to 0.1. C1.5.5 Minimum permitted vertical illuminance There shall be a minimum illuminance of 6 lux measured vertically at a point 1.0 m above the platform surface and perpendicular to the platform edge area. This value shall be achieved at a point 0.3 metres back from the platform edge, with the light sensor facing the same direction as the front of the train departing the platform or station. Where trains depart from both directions the requirements shall apply in both directions. C1.5.6 Diversity of vertical illuminance The diversity along the total of the usable platform edge area shall be greater than or equal to 0.5. C1.6 Lighting requirements for DOO stations (video cameras & monitors) C1.6.1 Minimum permitted horizontal illuminance The illuminance on the total of the usable platform edge area shall be greater than or equal to 10 lux at platform level. C1.6.2 Uniformity of horizontal illuminance open platform The uniformity of horizontal illuminance along the platform edge area on the open platform shall be greater than or equal to 0.4. C1.6.3 Uniformity of horizontal illuminance covered platform The uniformity of horizontal illuminance along the platform edge area under covered areas shall be greater than or equal to 0.4. C1.6.4 Diversity of horizontal illuminance The diversity at the platform edge area shall be greater than or equal to 0.1. C1.6.5 Minimum permitted vertical illuminance There shall be a minimum illuminance of 2 lux measured vertically at a point 1.0 metres above the platform surface and perpendicular to the platform edge area. This value shall be achieved at a point 0.3 metres back from the platform edge, with the light sensor facing the same direction as the front of the train departing the platform or station. Where trains depart from both directions the requirements shall apply in both directions. 10 RAIL SAFETY AND STANDARDS BOARD
Railway Group Standard Page 11 of 20 C1.6.6 Diversity of vertical illuminance The diversity along the total of the usable platform edge area shall be greater than or equal to 0.5. C1.7 Lighting installations C1.7.1 Colour The colour of light emitted from lighting installations shall be suitable in terms of spectral composition for the human visual system and the video cameras. Low pressure sodium lamps, and any other lamp whose colour is similar to those used in railway signalling, are prohibited. GI/RT7010 contains additional information on types of lamps that shall be avoided in specific situations as well as general information concerning factors for consideration. C1.7.2 Glare Luminaires, video cameras and monitors shall be located to ensure the view of driver or staff involved in train working is not impaired by: a) glare created by luminaires in the same field of view as DOO monitors and mirrors b) reflection of the light emitted from luminaires off DOO monitors and mirrors c) light from luminaires falling onto DOO camera lenses. C1.8 Lighting requirements for non-doo stations Lighting requirements for non-doo stations are set out in GI/RT7010. C2 Requirements for indicators C2.1 Introduction It is permissible for the following types of indicators to be installed to aid the dispatch of trains from stations: a) OFF indicators b) miniature banner repeater indicators c) right away (RA) indicators d) close door (CD) indicators. Requirements for the appearance and application of these indicators are set out in GK/RT0031. The positioning of these indicators and associated plungers or switches is set out in GK/RT0037. C2.2 CD and RA indicators additional requirements C2.2.1 It is permissible for additional CD and RA indicators to be provided if it is necessary to permit drivers of trains stationary at any normal stopping position to be able to observe the indications. Where no platform starting signal exists, CD and RA indicators (if required) shall be positioned so as to be readable by drivers of trains at all normal stopping positions. C2.2.2 Except as stated in C2.2.3, the RA indication shall be lit and operated according to the following: RAIL SAFETY AND STANDARDS BOARD 11
Railway Group Standard Page 12 of 20 Document to be Withdrawn as of 04/09/2010 a) Where a platform starting signal exists the RA indicator shall be lit when the signal displays a proceed aspect and the plunger/switch is operated and shall remain lit until the signal is replaced to danger. b) Where no platform starting signal exists the RA indicator shall be lit when the plunger/switch is operated and shall remain lit until the train is proved to have departed the platform (for example by track circuit operation). C2.2.3 Subject to a risk assessment, it is permissible for the lighting of the RA indicator to operate according to differing requirements provided that all the following conditions have been met: a) operating requirements dictate b) it is demonstrated that the alternative requirements do not increase the risk of a SPAD c) it is demonstrated that the operation of the indicator is logical and unlikely to lead to misunderstanding. Requirements for the risk assessment are set out in GO/RT3475. C3 Technical requirements for view by line of sight C3.1 General requirements It is permissible for the driver or staff involved in train working to view by line of sight the platform edge area and doors during the hours of daylight (or darkness where station lighting is provided in accordance with section C1.5). It is permissible for drivers to view by line of sight a train length of up to eight car lengths (nominal car length of 20 metres). The primary acceptance criterion for a given scheme shall be the visual detection of the target object (as defined in B3) in a number of typical locations, ie confident detection of the station work complete condition. C4 Technical requirements for station mirrors C4.1 General requirements The following requirements apply to mirrors mounted on the station and those mounted on the infrastructure off the end of the platform. It is permissible for the driver to view by station mirrors during the hours of daylight (or darkness where station lighting is provided in accordance with section C1.5). The maximum permitted number of mirrors for use at any given train stop location shall be one. It is permissible for drivers to view by a station mirror a train length of up to eight car lengths (nominal car length of 20 metres). 12 RAIL SAFETY AND STANDARDS BOARD
Railway Group Standard Page 13 of 20 The size, location and orientation of the mirrors shall be such that the driver is able to see the whole of the required image (all the train doors and the platform edge area) in the mirrors. The tolerance for achieving this shall be ± 1.0 metre from the marked train stop location. The primary acceptance criterion for a given scheme is the visual detection of the target object (as defined in B3) in a number of typical locations, ie confident detection of the station work complete condition. The location of the mirrors shall be such that railway signals and indicators are not obscured (see GK/RT0037). C4.2 Mechanical requirements Mirrors shall have spatial uniformity for faithful rendition of the scene in all likely ambient temperatures and wind loadings. C4.3 Optical requirements Mirrors shall have reflectance values, uniformity of reflectance, and reflective colour for faithful rendition of the scene. Where protective covers are used, the acceptance tests (see section D1) shall be achieved with the protective covering in place. C4.4 Condensation Mirrors shall have suitable measures to prevent condensation and frost forming on the optical surface. C5 Technical requirements for station cameras and monitors C5.1 General requirements The following requirements apply to cameras and monitors mounted on the station and those mounted on the infrastructure off the end of the platform. It is permissible for drivers or staff involved in train working to view by station cameras and monitors during the hours of daylight (or darkness where station lighting is provided in accordance with section C1.6). All images shall be displayed simultaneously and in a logical and consistent format; the mixing of colour and monochrome images is not permitted. Logical in this context means the sequence of images shall be representative of the scene being displayed. It is permissible for multiple images to be displayed on monitors, provided that the DOO scheme does not have inconsistent display formats and the image size requirements (section C5.4) are met. Where multiple images are displayed there shall be clear delineation between the images. The location and orientation of the monitors shall be such that the driver or staff involved in train working is able to see the whole of the required image (all the train doors and the platform edge area) on the monitors. The tolerance for achieving this shall be ± 1.0 metre from the marked train stop location. The location of the cameras and monitors shall be such that railway signals and indicators are not obscured (see GK/RT0037). Appendix 2 is non-mandatory and gives application guidelines for camera/monitor systems. C5.2 Requirements for station-mounted cameras Cameras shall be electrically and optically compatible with the monitors to which they are connected. RAIL SAFETY AND STANDARDS BOARD 13
Railway Group Standard Page 14 of 20 Document to be Withdrawn as of 04/09/2010 C5.3 Requirements for station-mounted monitors Monitors shall be electrically and optically compatible with the cameras to which they are connected. Monitors shall have high luminance output and low reflectance. Except as indicated below it is permissible to use either monochrome or colour monitors. Where monochrome cathode ray tube (CRT) monitors are used, non-white phosphors shall not be used (for example green phosphor monitors shall not be used). Measures shall be taken to prevent the burning on of images onto CRT monitors (for example switching arrangements, frequent changing of CRTs). It is permissible to use non-crt monitors, provided the requirements for the monitors and for the camera/monitor system are met. It is permissible to use background screens and hoods to optimise the performance of the monitors in daylight. The location and arrangement of the monitors shall be optimised for minimum reading time and error. Appendix 2 is non-mandatory and gives application guidelines for camera/monitor systems. Where a risk exists within the system of frozen images then system proving shall be required to ensure that frozen images will not occur. C5.4 Performance of the station-mounted camera/monitor systems The primary acceptance criterion for a given scheme is the visual detection of the target object (as defined in B3) in a number of typical locations, ie confident detection of the station work complete condition. The minimum angular size of the height of the target object as displayed on the monitor and subtended at the observer's eye shall be 20 minutes of arc, the image size shall be a minimum of 10% of the display height of the monitor and there shall be a minimum system performance resolution of 400 horizontal television lines. The optical properties of the system shall be adequate for the faithful rendition of the scene (all train doors and the platform edge area). Consideration shall be given to the system requirements controlling the angular size of the image displayed, resolution, brightness, contrast, shape distortion, refresh rate and the speed of adaptation to brightness and contrast. Appendix 1 is non-mandatory and describes a way of meeting the requirements of this standard when incorporated in an appropriate system design. C6 Technical requirements for on-train cameras and monitors C6.1 General requirements It is permissible for drivers to view by on-train cameras and monitors during the hours of daylight (or darkness where station lighting is provided in accordance with section C1.6). The maximum permitted number of images per monitor shall be four (see section C5.4 for minimum image size). All images shall be displayed simultaneously and in a logical and consistent format; the mixing of colour and monochrome images is not permitted. Logical in this context means the sequence of images shall be representative of the scene being displayed. 14 RAIL SAFETY AND STANDARDS BOARD
Railway Group Standard Page 15 of 20 C6.2 Requirements for on-train cameras Cameras shall be electrically and optically compatible with the monitors to which they are connected. The orientation of cameras and the optical components of the housings shall be such that significant degradation in optical performance does not occur as a result of naturally occurring foreign objects (for example rain or snow). Appendix 2 is non-mandatory and gives application guidelines for camera/monitor systems. C6.3 Requirements for on-train monitors Monitors shall be electrically and optically compatible with the cameras to which they are connected. Except as indicated below it is permissible to use either monochrome or colour monitors. Where monochrome cathode ray tube (CRT) monitors are used, non-white phosphors shall not be used (for example green phosphor monitors shall not be used). It is permissible to use non-crt monitors, provided the requirements for the monitors and for the camera/monitor system are met. It is permissible to use hoods to optimise the performance of the monitors in daylight. The location and arrangement of the monitors shall be optimised for minimum reading time and error, taking into account the requirements of other equipment and features of the cab. The activation of the image(s) on the on-train monitors shall be performed automatically and immediately prior to door release. The cancellation of the image(s) on the on-train monitors shall be performed automatically, following door closure and prior to the departure of the train. Where a risk exists within the system of frozen images then system proving shall be required, to ensure that frozen images will not occur. C6.4 Performance of on-train camera/monitor systems The requirements for on-train camera/monitor systems shall be the same as those for station camera/monitor systems as detailed in section C5.4. C7 Technical requirements for station cameras and on-train monitors C7.1 General requirements It is permissible for drivers to view by station cameras and on-train monitors during the hours of daylight (or darkness where station lighting is provided). The maximum permitted number of images per monitor shall be four. All images shall be displayed simultaneously and in a logical and consistent format; the mixing of colour and monochrome images is not permitted. Logical in this context means the sequence of images shall be representative of the scene being displayed. The location and orientation of the video signal transmitter shall be such that the transmitted video signal from the platform is capable of being received by the train in its normal range of stopping locations. RAIL SAFETY AND STANDARDS BOARD 15
Railway Group Standard Page 16 of 20 Document to be Withdrawn as of 04/09/2010 C7.2 Requirements for station cameras The requirements for station cameras are set out in section C5.2 of this document. C7.3 Requirements for on-train monitors The requirements for on-train monitors are set out in section C6.3 of this document. C7.4 Performance of station camera and on-train monitor systems The requirements for station camera and on-train monitor systems shall be the same as those for station camera/monitor systems as set out in section C5.4. 16 RAIL SAFETY AND STANDARDS BOARD
Railway Group Standard Page 17 of 20 D1 Approval Part D D1.1 Requirements general The approval process of a train dispatch system shall include: a) details of the proposed scheme, including details of changes to the scheme if applicable b) confirmation that the tests have been conducted in representative ambient lighting conditions appropriate for the train dispatch mode(s) c) evidence that the testing has been conducted by persons with visual performance set to the minimum level set out in GO/RT3251 d) confirmation that all the applicable requirements of this document have been met e) in the case of video camera/monitor systems, confirmation that the resolution of the system is adequate for the installation and task. It is permissible to conduct these tests using a suitable test target (for example Rotakin target) to demonstrate a minimum system performance resolution of 400 horizontal television lines. f) section by section test/assessment results g) a maintenance specification (see section D2). It is permissible to conduct the above tests during commissioning testing, provided that any non-compliances are addressed before the scheme becomes operational. D1.2 Requirements train-mounted equipment All component parts of the train dispatch system(s) that are train-mounted shall form part of the engineering acceptance process. D1.3 Requirements infrastructure-mounted equipment The station operator, or the infrastructure controller according to the ownership of the equipment shall approve all component parts of the train dispatch system(s) that are infrastructure-mounted. The processes used by the station operator and infrastructure controller shall demonstrate compliance of the proposed scheme with the requirements of this document. D2 Maintenance The following general requirements shall apply: a) Train dispatch systems shall be maintained to ensure their continued functioning and performance. b) The station operator or infrastructure controller, according to the ownership of the equipment, shall be responsible for specifying and executing the maintenance requirements for train dispatch systems such that the mandatory requirements specified in this document continue to be met for infrastructure mounted equipment. c) The maintenance requirements for train mounted equipment shall be specified in the train operator s maintenance plan and validated by a conformance certification body. d) Records of the subsequent maintenance checks shall be made. RAIL SAFETY AND STANDARDS BOARD 17
Railway Group Standard Page 18 of 20 Document to be Withdrawn as of 04/09/2010 Appendix 1 1.1 Cameras Performance requirements for cameras and monitors used in train dispatch systems (The contents of this appendix are non-mandatory) 1.1.1 Performance requirements monochrome cameras a) resolution: 560 lines b) minimum illumination rating: 0.1 lux (using an f1.4 lens producing 25% video) c) signal-to-noise ratio: 48 db. 1.1.2 Performance requirements colour cameras a) resolution: 470 lines b) minimum illumination rating: 1.5 lux (using an f1.4 lens producing 25% video) c) signal-to-noise ratio: 48 db. 1.2 Monitors 1.2.1 Performance baseline cathode ray tube (CRT) monitors a) type: monochrome only for outdoor use ; monochrome or colour for on-train applications b) video input: 1.0 volt ± 3 db composite video, hum rejection c) common mode rejection of input: >50 db at 50/60 Hz d) common mode input signal range: <3 V pk-pk e) bandwidth: >10 MHz f) resolution > 800 horizontal TV lines g) linear distortion < 2% h) output luminance capability: > 400 cd.m -2 i) additional features for platform monitors only: anti-reflective coated bonded front panel. 1.2.2 Performance baseline thin-film transistor (TFT) monitors a) type: monochrome or colour b) video input: 1.0 volt ± 3 db composite video c) resolution greater than or equal to 1024 x 768 pixels d) output luminance capability: > 400 cd.m -2 e) contrast ratio: > 400:1 (maximum output : no output) f) response time: < 30 ms g) viewing angle: >90 in both planes h) other considerations: anti-reflection screen required. 18 RAIL SAFETY AND STANDARDS BOARD
Railway Group Standard Page 19 of 20 Appendix 2 2.1 On-train camera/monitor systems Application guidelines for camera/monitor systems (The contents of this appendix are non-mandatory) The following application guidelines are recommended: a) minimum one camera per carriage per side, covering all doors on that carriage side b) consideration should be given to the fitting of forwards and rearwards-facing cameras on each vehicle side. This will enable the selection of rearward facing cameras as specified in section C6.2 and may allow some form of backup arrangement if a camera fails c) cameras should be fitted on both sides of the carriage to cater for differing station layouts d) where non-crt in-cab displays are used, there should be provision for userposition adjustment e) where image splitting devices are used, these should be of high quality to ensure stable images f) coupling-up should automatically display the required number of camera images. 2.2 Infrastructure mounted camera/monitor systems The following application guidelines are recommended: a) Where images are displayed simultaneously, it is desirable to use labels to indicate which area of the platform each monitor covers. (see C5.1 para 3) b) Where multiple images are displayed the preferred arrangement is for each monitor to display the image from one camera. (see C5.1 para 4) c) Clause C5.3 (para 7) requires the location and arrangement of the monitors to be optimised for minimum reading time and error. The preferred location for monitors is in the upper field of view with respect to observer's eye level. It is preferable to limit the total number of monitors such that a person is to view at any one location a maximum of nine and that they are arranged to be in a horizontal array with the forward-most monitor corresponding spatially with the actual front of the train (that is in a mirror arrangement). RAIL SAFETY AND STANDARDS BOARD 19
Railway Group Standard Page 20 of 20 Document to be Withdrawn as of 04/09/2010 References Railway Group Standards and other Railway Group Documents GA/RT6001 GA/RT6004 GA/RT6006 GI/RT7010 GK/RT0031 GK/RT0037 GO/RT3000 GO/RT3251 GO/RT3255 GO/RT3475 Railway Group Standards Change Procedures Temporary Non-Compliance with Railway Group Standards Derogations from Railway Group Standards Lighting of Railway Premises Lineside Signals and Indicators (To be replaced by GE/RT8037) Signal Positioning and Visibility Master Rule Book Train Driving Train Working: Competence and Fitness Operational Requirements for the Dispatch of (scheduled to be published in December 2003) The Catalogue of Railway Group Standards and the Railway Group Standards CD-ROM give the current issue number and status of documents published by RSSB. Other References BS4800 BS381C Schedule of Paint Colours for Building Purposes Specification of Colours for Identification, Coding and Special Purposes 20 RAIL SAFETY AND STANDARDS BOARD