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Discrete Event Simulation of Bus Terminals
Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
2019 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Public transport is important to society as it provides spatial accessibility and reduces congestion and pollution in comparison to other motorized modes. To assure a high-quality service, all parts of the system need to be well-functioning and properly planned. One important aspect for the system's bus terminals is their capacity. This needs to be high enough to avoid congestion and queues and the delays these may lead to. During planning processes, various suggested designs and solutions for a terminal need to be evaluated. Estimating capacity and how well the suggestions will function is a challenging problem, however. It requires analysis of complex interactions and behaviour of the vehicles. This sort of analyses can preferably be carried out using microsimulation. Furthermore, a discrete event simulation approach can make use of the fact that the path of a vehicle through a terminal can readily be described by a sequence of events (such as arriving, starting to drive to a stop etc.).

The overall aim of this thesis is to investigate how discrete event simulation can be used to evaluate bus terminal design and traffic control policies. The main contribution is the development of a method for bus terminal simulation. As a first step, a discrete event simulation model of a combined bus and tram stop is formulated. The model is tested on a real system where the current design is compared to an alternative one. The test shows that a model developed with a discrete event approach can be used to evaluate the situation at a stop and compare design alternatives. In the next step, a general discrete event simulation model of bus terminals is formulated. A modular approach is introduced, where a terminal can be constructed from a set of module building blocks. Another important contribution of the model is its spatial resolution that allows for queues and blockages to occur throughout the terminal. By applying the simulation model in a case study, it is shown that the model can be used to evaluate and compare various scenarios related to the layout, number of passengers and the outside traffic situation. Lastly, the bus terminal simulation model is used in a second case study in order to compare model output with empirical data. This study identified a number of factors that may have had an influence on differences between observations and simulation results and that is of interest to look further into. This includes the actual adherence to terminal rules and the effects of model parameters.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2019. , p. 38
Series
Linköping Studies in Science and Technology. Licentiate Thesis, ISSN 0280-7971 ; 1841
National Category
Transport Systems and Logistics Computer Systems
Identifiers
URN: urn:nbn:se:liu:diva-156646DOI: 10.3384/lic.diva-156646ISBN: 9789176850664 (print)OAI: oai:DiVA.org:liu-156646DiVA, id: diva2:1313235
Presentation
2019-05-17, K3, Kåkenhus, Campus Norrköping, Norrköping, 13:15 (Swedish)
Opponent
Supervisors
Available from: 2019-05-02 Created: 2019-05-02 Last updated: 2019-05-06Bibliographically approved
List of papers
1. A Simulation Model of Local Public Transport Access at a Railway Station
Open this publication in new window or tab >>A Simulation Model of Local Public Transport Access at a Railway Station
2017 (English)In: Proceedings of Raillille 2017 - 7th lnternational Conference on Railway Operations Modelling and Analysis / [ed] N. Tomii, I.A. Hansen, J. Rodriguez, P. Pellegrini, S. Dauzère-Pérès, D. De Almeida, 2017, p. 922-943Conference paper, Published paper (Other academic)
Abstract [en]

A high quality railway service requires that all parts of the complete journey, from door to door, are well-functioning. This includes any transfers taking place, as well as last mile transportation to and from the railway station. Since the last mile often consists of local public transport, the access to this mode at stops and terminals and how well these are functioning are of great importance. A critical aspect is the capacity of the stop or the terminal in relation to the number of departures, where a higher capacity generally means an increase in size. At the same time it is desirable to limit the use of valuable land and keeping the facility as small as possible. The trade-off between capacity and size needs to be evaluated when designing stops and terminals. In this study we have developed a discrete event simulation model of a combined bus and tram stop, which is a part of a larger multi-modal station. The objective of the study is to evaluate the modelling approach for the situation at hand. Of special interest are the complexities due to the different driving patterns of buses and trams. The developed model is capable of evaluating design alternatives and is applied in a case study of a stop at Norrköping railway station in southern Sweden. The model was found to realistically capture the various events occurring at such a stop and the case study further showed that the model is a useful tool in design evaluation.

Keywords
Microsimulation, Terminal layout, Performance evaluation, Stop capacity, Bus and tram
National Category
Transport Systems and Logistics
Identifiers
urn:nbn:se:liu:diva-137321 (URN)978-2-85782-723-8 (ISBN)
Conference
7th International Conference on Railway Operations Modelling and Analysis (RailLille2017), Lille, France April 4-7 2017
Available from: 2017-05-12 Created: 2017-05-12 Last updated: 2019-05-02Bibliographically approved

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Citation style
  • apa
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  • de-DE
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