“CBTC (Communication Based Train Control) + TBTC (Track-circuit Based Train Control)” is a dual-signal redundant train control system. The TBTC is the fallback mode, which is mainly implemented in the re-signaling program of the existing TBTC line. This study uses reliability block diagrams to quantitatively analyze the reliability of the dual-signal system and the time-colored Petri net of degraded operations to calculate the delay time caused by signal equipment failure leading to mode transition. These methods are applied to “CBTC + TBTC” re-signaling program of Shanghai Metro Line 2. The results show that the reliability of the new system is higher than that of the existing TBTC system and a single CBTC system, and the train delay caused by the fault leading to system fallback is minimized to 1 min. The analysis method also provides references for other multi-mode train control systems.


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    Title :

    Reliability and Operational Impact of “CBTC + TBTC” Dual-Signal Redundant Train Control System


    Contributors:
    Liu, Yu (author) / Ou, Dongxiu (author) / Wang, Xiaoyong (author) / Dong, Decun (author)

    Conference:

    21st COTA International Conference of Transportation Professionals ; 2021 ; Xi’an, China


    Published in:

    CICTP 2021 ; 418-429


    Publication date :

    2021-12-14




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English