Crossing times on single-track railway lines: dependencies of different infrastructure and traffic factors
2007 (English)In: Proceedings of Railway Engineering 9th International Conference and Exhibition / [ed] Ford, M.C., 2007Conference paper (Refereed)
Operation of single-track railway lines is characterised by crossings. Due to disturbances the crossing time is stochastic. Important properties such as capacity, run times and overall punctuality are strongly dependent on the crossing time. In non-congested situations the crossing time can be modelled analytically. SAMFOST (Simplified Analytical Model For Single Tracks) is a model that shows in a transparent way how the crossing time varies along a railway line.
This paper shows how the mean crossing time function can be used to examine timetable flexibility, i.e. possibilities to change the timetable given constraints on the mean crossing time. Three different measures for timetable flexibility are proposed, showing how the available crossing points are spread along the line and the spread of mean crossing time for available crossing points.
Many factors such as infrastructure parameters, vehicle parameters, timetable, delays etc affect the crossing time. In many cases these factors interact in complicated ways. To show this, the results of a 26-factorial experiment are presented. Partial double-tracks and passenger stops at timetable crossing points are examples of measures that give geographically local effects with strong interactions, whereas inter-station distance, vehicle type and arrival punctuality are factors with a more general impact and weaker interactions.
Place, publisher, year, edition, pages
single-track, crossing, rialway operation, delay, timetable flexibility
Research subject Järnvägsgruppen - Kapacitet
IdentifiersURN: urn:nbn:se:kth:diva-12722OAI: oai:DiVA.org:kth-12722DiVA: diva2:318280
Railway Engineering 9th International Conference and Exhibition
ProjectsFramtida infrastruktur och kvalitet i tågföring