The Effect of Travel Time Reliability on Morning Peak Travellers route choice in Large Metropolitan Area

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Sadat Mirjafari, Parisa | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40228 (09)
University: Sharif University of Technology
Department: Civil Engineering
Advisor(s): Poorzahedy, Hossein
Abstract:
Data collected from street networks show that travel time in urban street networks is a stochastic variable, whose range of variation increases with the congestion level. Work and school trips comprise the major part of morning peak volumes, whose common characteristic is that they need to be made on time. For this reason, these travelers are pessimistic in their route choice, and try to choose routes which are more reliable. Travel time standard deviation is one of the common measures for estimating travel time reliability that is related to properties of day-to-day travel time distribution on a particular route. Based on the empirical data collected from Tehran street network, this paper suggests travel time standard deviation in a link as a function of travel time itself and the level of congestion on it. It is discussed how the resulting function is used to model pessimistic view of travel time within a pessimistic equilibrium flow context. This equilibrium has been studied on two urban street networks. The results show that pessimistic equilibrium model performs slightly letter than the user equilibrium counterpart.
Keywords:
Reliability ; Travel Time ; Pessimistic Equilibrium Flow ; Travel Time Standard Deviation

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