National Academies Press: OpenBook

Innovations in Travel Demand Modeling, Volume 2: Papers (2008)

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Suggested Citation:"T57054 txt_108.pdf." National Academies of Sciences, Engineering, and Medicine. 2008. Innovations in Travel Demand Modeling, Volume 2: Papers. Washington, DC: The National Academies Press. doi: 10.17226/13678.
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microsimulation techniques could be employed. The paper describes the steps that DTA models employ, some difficulties encountered with a large- scale implementa- tion of a DTA model using Vista, and the findings of detailed analysis of these problems. The intent is not to showcase any particular DTA package but to identify problems that are likely to be encountered in any DTA implementation and to under- stand why they occur. The problems addressed include excessive localized congestion, excessive variability in movement travel times by exiting vehicles, and why vehi- cles continue to be routed through problem areas even after congestion has developed. The work on which this paper is based is ongoing. It is hoped that additional insight, clarification, and con- clusions will be forthcoming and that there will be an opportunity to discuss them and hear of other experi- ences at the Innovations in Travel Modeling Conference. REFERENCE Daganzo, C. F. The Cell Transmission Model: A Simple Dynamic Representation of Highway Traffic Consistent with the Hydrodynamic Theory. Transportation Research Part B: Methodological, Vol. 28, No. 4, 1994, pp. 269–287. 108 INNOVATIONS IN TRAVEL DEMAND MODELING, VOLUME 2

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TRB Conference Proceedings 42, Innovations in Travel Demand Modeling, Volume 2: Papers includes the papers that were presented at a May 21-23, 2006, conference that examined advances in travel demand modeling, explored the opportunities and the challenges associated with the implementation of advanced travel models, and reviewed the skills and training necessary to apply new modeling techniques. TRB Conference Proceedings 42, Innovations in Travel Demand Modeling, Volume 1: Session Summaries is available online.

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