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Evaluation method of the saturation level of a railway line
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Transport Planning, Economics and Engineering.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Saturation is becoming more and more of an issue for infrastructure owners, but there is no existing

method to measure it. This master thesis aims at suggesting a method in order to evaluate the

saturation level of a railway line. Saturation has an ambiguous definition. It deals with capacity

issues, timetable stability and robustness, and with delay issues. Three methods are mainly studied,

each one defining saturation from a different angle, and meeting a different definition of saturation.

These methods are the compression method, defining saturation as a capacity issue, the robustness

method, and the regularity method, i.e. delays analysis. A fourth method is created and studied in

order to complete the previous three. The idea is to find the relevant indicators to evaluate

saturation. These methods are first studied from a theoretical perspective before being applied to a

study case to choose the relevant indicators. This study case involves a statistical analysis and a

dynamic simulation of the graphical timetable. The results show that the regularity method is

irrelevant to study saturation. The method suggested by this master thesis in order to evaluate

saturation is a two-step method. The first step is the diagnosis based on the compression method

and the traffic heterogeneity. The second step is the comparison between different scenarios to

reduce saturation: this step is based on the compression method, the robustness method and the

traffic heterogeneity. This method can later be used for an economic study or a multi-criteria


Place, publisher, year, edition, pages
TSC-MT, 16-003
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-191163OAI: diva2:955170
Available from: 2016-08-24 Created: 2016-08-24

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