Micro-simulation based analysis of railway lines robustness

Fabrizio Cerreto

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    Abstract

    Railway Undertakers and Railway Infrastructure Managers have a variety of parameters to measure robustness of timetables: this paper examines empirical data collected from Nederlandse Spoorwegen on the heavily occupied railway line between The Hague and Rotterdam in The Netherlands. The results show that the robustness indicator examined are affected by infrastructure changes in different ways. A micro-simulation of the line is used to determine the robustness of different railway infrastructure scenarios measuring the capacity consumption, as well as the share of trains affected by amount of delays in case of disturbance. The individual robustness indicators’ sensitivity to primary delays is estimated through regression analysis and either the second derivative or the amplification as a function of the train frequency. A skimming method is used for the selection and simulation of a delayed train course that can represent the total train delay along the line. Dispatching measures in case of disturbance are excluded by applying First-In First-Out rule in simulations. The benefits of modifications to the track infrastructure, the timetable, and the signaling system, in terms of consecutive delays reduction, are estimated by inserting a range of primary delays. The research highlighted the need of a step further than currently planned in the infrastructure development to improve the line’s robustness. This is significant for the relationship between IMs and RUs, as the same infrastructure or planning/scheduling improvements could be measured in a different way from each other contractor, with economic impact on the infrastructure use agreements.
    Original languageEnglish
    Title of host publicationProceedings of RailTokyo2015
    Number of pages13
    Publication date2015
    Article number164
    Publication statusPublished - 2015
    Event6th International Conference on Railway Operations Modelling and Analysis - Chiba Institute of Technology, Tsudanuma Campus, Tokyo, Japan
    Duration: 23 Mar 201526 Mar 2015

    Conference

    Conference6th International Conference on Railway Operations Modelling and Analysis
    LocationChiba Institute of Technology, Tsudanuma Campus
    CountryJapan
    CityTokyo
    Period23/03/201526/03/2015

    Keywords

    • Stability
    • Robustness
    • Micro simulation
    • Timetable
    • Railway
    • Infrastructure

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