This standard specifies general provisions, systematical and basic functions, technical requirements and environmental conditions of the urban rail transit signal system. This standard is applicable to subway and light rail systems and could be used as a reference for other urban rail transit systems, like tramcars.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this code. For dated reference, subsequent amendments (excluding amending error in the text) to, or revisions of, any of these publications do not be applied. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions of these references are applied or not. For undated references, the latest edition of the normative document is applicable to this standard.
GB 10493 Technical Specification for Crossing Signal Equipment within the Station
GB 10494 Technical Specification For Crossing Signal Equipment in Wayside
EN 50121-4: Railway applications: Electromagnetic Compatibility-Part 4 Emission and Immunity Of The Signaling And Telecommunications Apparatus
TB/T 3073-2003 EMC Tests And Limits For Railway Electrical Signaling Apparatus
3 Terms and Definitions
3.1 Urban rail transit signal It is applied in the urban rail transit and is a generic term for manual or automatic running command and train operating control and control technology for safe intervals.
3.2 Centralized traffic control (CTC)
It refers to centralized display of conditions for stations, space intervals, signals, rail switches, rail sections and running position of trains in the dispatch center, dispatchers make centralized control for signals and rail switches in the section and command trains transporting the system equipment.
3.3 Automatic train supervision (ATS) It is the generic term for automatic running command and control and monitoring and management technology of train operation.
3.4 Automatic train protection (ATP) It is a generic term of realization for monitoring technologies of operation intervals, over speed protection, admission passage safety and car doors.
3.5 Automatic train operation (ATO)
It is the generic term for automatic realization of monitoring technologies for train operating speed, shut-down and car doors.
3.6 Positive train identification (PTI) It refers to identify identification numbers of train sorting through technical means and determines the corresponding train is the train really needed to be monitored.
3.7 Automatic train control (ATC)
It is the generic term for the urban rail transit signal system to realize automatic train supervision (ATS), automatic train protection, control technology for automatic train operation.
3.8 Block
It refers to a technology which ensures trains to run with a certain spacing distance by signals or certificates.
3.9 Fixed block It is a block mode, the minimum trace spacing distance between the front train and the following train is pre-established and will not change.
3.10 Moving block It is a block mode, in which the unit of minimum safety trace spacing distance between the front train and the following train is not pre-established and change along with movement and speed of the train.
3.11 Quasi-moving block It refers to a block mode, in which the unit of the minimum safety trace spacing distance between the front train and the following train is pre-established and fixed, the target distance and speed are set in accordance with sate of the front train and it is a block mode between fixed block and moving block.
3.12 Overlap section It is a block section, which is extended to realize over-speed protection and ensure safe shut-down.
3.13 Target speed
It is the allowable speed for the train to get the front target place.
3.14 Target distance
It is the distance needed to be covered by the train to get the target place.
GB/T 12758-2004 The following standards are cited：
