A framework is presented to evaluate the safety and availability of the railway operation, and quantifying the probability of the signalling system not to supervise the railway traffic. Since a failure of the signalling systems still allows operation of the railway, it is not sufficient to study their effect on the railway operation by considering only the failures and delays. The safety and availability are evaluated, handling both repairs and replacements by using a Markov model. The model is verified with a case study of Swedish railway signalling systems with different scenarios. The results show that the probability of being in a state where operation is possible in a degraded mode is greater than the probability of not being operative at all, which reduces delays but requires other risk mitigation measures to ensure safe operation. The effects that different improvements can have on the safety and availability of the railway operation are simulated. The results show that combining maintenance improvements to reduce the failure rate and increase the repair rate is more efficient at increasing the probability of being in an operative state and reducing the probability of operating in a degraded state.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Safety and availability evaluation of railway operation based on the state of signalling systems




    Erscheinungsdatum :

    2017




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :

    Klassifikation :

    BKL:    55.30 Schienenfahrzeugtechnik, Eisenbahntechnik
    Lokalklassifikation TIB:    275/7030




    Safety and availability evaluation of railway operation based on the state of signalling systems

    Morant, Amparo / Gustafson, Anna / Söderholm, Peter et al. | SAGE Publications | 2017


    Safety and Availability — Basic Attributes of Safety-Related Electronic Systems for Railway Signalling

    Rástočný, Karol / Bubeníková, Emília | British Library Conference Proceedings | 2019



    Evaluation Methods for Railway Signalling Systems from the Viewpoint of Availability

    Iwata, K. / Hiraguri, S. / Watanabe, I. | British Library Online Contents | 2009