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Uniform Modeling of Railway Operations

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Formal Techniques for Safety-Critical Systems (FTSCS 2016)

Part of the book series: Communications in Computer and Information Science ((CCIS,volume 694))

Abstract

We present a comprehensive model of railway operations written in the abstract behavioral specification (ABS) language. The model is based on specifications taken from the rulebooks of Deutsche Bahn AG. It is statically analyzable and executable, hence allows to use static and dynamic analysis within one and the same formalism. We are able to combine aspects of micro- and macroscopic modeling and provide a way to inspect changes in the rulebooks. We illustrate the static analysis capability by a safety analysis based on invariant reasoning that only relies on assumptions about the underlying railway infrastructure instead of explicitly exploring the state space. A concrete infrastructure layout and train schedule can be used as input to the model to examine dynamic properties such as delays. We illustrate the capability for dynamic analysis by demonstrating the effect that different ways of dealing with faulty signals have on delays.

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Notes

  1. 1.

    For abstraction of sequential computations there are synchronous calls as well.

  2. 2.

    Model available at formbar.raillab.de/index.php/en/publications-and-tools/demo.

  3. 3.

    This model transformation is not a behavioral refinement, therefore, it cannot be captured in refinement-based formalisms. ABS offers software product lines as an effective method to manage and track changes, see [12] for a detailed discussion.

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Acknowledgements

We thank Sebastian Schön for his insights into train operations and the anonymous reviewers for helpful comments. This work is supported by FormbaR, ’Formalisierung von betrieblichen und anderen Regelwerken’, part of AG Signalling/DB RailLab in the Innovation Alliance of Deutsche Bahn AG and TU Darmstadt.

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Authors and Affiliations

  1. Department of Computer Science, TU Darmstadt, Darmstadt, Germany

    Eduard Kamburjan & Reiner Hähnle

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  1. Eduard Kamburjan
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  2. Reiner Hähnle
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Correspondence to Eduard Kamburjan .

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  1. KTH Royal Institute of Technology , Stockholm, Sweden

    Cyrille Artho

  2. Dept of Informatics, University of Oslo, Oslo, Norway

    Peter Csaba Ölveczky

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Kamburjan, E., Hähnle, R. (2017). Uniform Modeling of Railway Operations. In: Artho, C., Ölveczky, P. (eds) Formal Techniques for Safety-Critical Systems. FTSCS 2016. Communications in Computer and Information Science, vol 694. Springer, Cham. https://doi.org/10.1007/978-3-319-53946-1_4

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  • DOI: https://doi.org/10.1007/978-3-319-53946-1_4

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