A simulation based framework for evaluatingeffects of infrastructure improvements onscheduled and operational delays
2015 (English)In: 6th International Conference on Railway Operations Modelling and Analysis, International Association of Railway Operations Research , 2015Conference paper (Refereed)
This paper aims at presenting a framework for obtaining and evaluating multiple timetablesin operational conditions on different infrastructure alternatives. Evaluating several differenttimetables, which share characteristics regarding departure frequencies, helps in gettinga more comprehensive picture of how scheduled and operational delays are affected byimprovements or reductions in the infrastructure.In order to flexibly create infrastructure alternatives a script is developed in which differentstation layouts can be defined and expanded into a railway line by connecting stationstogether. This is then compiled to files that RailSys can interpret, thereby facilitating in includingthe infrastructure as a variable in the analysis. Timetables are obtained by definingnominal train paths in a combinatorial approach and simulating these in RailSys in order toget conflict free timetable solutions.A case study is presented where the infrastructure, applied departure frequencies andsuperimposed stochastic delays are varied. Results from this give an indication of howmuch the scheduled and operational delays are improved when longer sections of a singletrack line are expanded to double track. The case study is fictive but the framework canbe used for evaluating real scenarios, e.g. where different infrastructure expansions areweighed against each other and only one of them can be realized.
Place, publisher, year, edition, pages
International Association of Railway Operations Research , 2015.
Railway, Simulation, Single track, Timetable, Delay
Transport Systems and Logistics
Research subject Transport Science
IdentifiersURN: urn:nbn:se:kth:diva-168024OAI: oai:DiVA.org:kth-168024DiVA: diva2:813957
6th International Conference on Railway Operations Modelling and Analysis (RailTokyo)
QC 201505262015-05-252015-05-252015-05-26Bibliographically approved