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Safety and availability evaluation of railway operation based on the state of signalling systems
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Business Administration and Industrial Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
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Number of Authors: 5
2017 (English)In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 231, no 2, 226-238 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2017. Vol. 231, no 2, 226-238 p.
National Category
Other Civil Engineering Reliability and Maintenance
Research subject
Operation and Maintenance; Mining and Rock Engineering; Quality Technology and Management
Identifiers
URN: urn:nbn:se:ltu:diva-9431DOI: 10.1177/0954409715624466ISI: 000394085100008Scopus ID: 2-s2.0-85009809587Local ID: 80be67df-554a-4524-a31a-4fdc3fcfb204OAI: oai:DiVA.org:ltu-9431DiVA: diva2:982369
Note

Validerad; 2017; Nivå 2; 2017-02-06 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Morant, AmparoGustafson, AnnaSöderholm, PeterLarsson-Kråik, Per-OlofKumar, Uday
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Operation, Maintenance and AcousticsMining and Geotechnical EngineeringBusiness Administration and Industrial Engineering
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Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit
Other Civil EngineeringReliability and Maintenance

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