Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/62637
Title: Combined activity/travel choice models : time-dependent and dynamic versions
Authors: Lam, WHK 
Huang, HJ
Keywords: Combined activity/travel choice models
Dynamic traffic assignment
Variational inequality
Temporal activity utility
Queuing networks
Issue Date: 2003
Publisher: Springer
Source: Networks and spatial economics, 2003, v. 3, no. 3, p. 323-347 How to cite?
Journal: Networks and spatial economics 
Abstract: To fully understand and predict travel demand and traffic flow, it is necessary to investigate what drives people to travel. The analysis should examine why, where and when various activities are engaged in, and how activity engagement is related to the spatial and institutional organization of an urban area. In view of this, two combined activity/travel choice models are presented in this paper. The first one is a time-dependent (quasi-dynamic) model for long-term transport planning such as travel demand forecasting, while the other one is a dynamic model for short-term traffic management such as instantaneous flow analysis. The time-dependent model is formulated as a mathematical programming problem for modeling the multinomial logit activity/destination choice and the user equilibrium route choice behavior. It can further be converted to a variational inequality problem. On the other hand, the dynamic model is aimed to find a solution for equilibrium activity location, travel route and departure time choices in queuing networks with multiple commuter classes. It is formulated as a discrete-time, finite-dimensional variational inequality and then converted to an equivalent “zero-extreme value” minimization problem. Solution algorithms are proposed for these two models and numerical example is presented for the latter. It is shown that the proposed modeling approaches, either based on time-dependent or dynamic traffic assignment principles, provide powerful tools to a wide variety of activity/travel choice problems in dynamic domain.
URI: http://hdl.handle.net/10397/62637
ISSN: 1566-113X
DOI: 10.1023/A:1025346318490
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