A THEORETICAL AND EMPIRICAL MODEL OF TRIP CHAINING BEHAVIOR

This paper addresses the theoretical and empirical issues involved in modeling complex travel patterns. Existing models have the shortcoming of not representing the interdependencies among trip links in trip chains with multiple non-home stops. A theoretical model based on utility theory and explicitly accounting for the trade-offs involved in the choice of multiple-stop chains is developed. Using this theoretical model, utility maximizing conditions for a household's choice of a daily travel pattern are derived. The optimum travel pattern is described in terms of the number of chairs (tours) traveled on a given day and in terms of the number of stops (sojourns) made on each of those chains. For a given household, the form of the optimum pattern is a function of the transportation expenditures (time, cost) required to reach potential destinations. Constraints on the conditions of optimality due to the limited and discrete nature of travel pattern alternatives are also considered. Parameters of the general utility function were estimated empirically using actual travel data derived from a home interview survey taken in Washington, DC. The multinomial logit model is used to relate utility scores for the alternative travel patterns to choice probabilities. The resulting parameter estimates agree with theoretical expectations and with empirical results obtained in other studies. In order to demonstrate the empirical and theoretical implications of the model, forecasts for various transportation policies (e.g., gasoline price increases, transit fare reductions), as made by this model and by other less complex models, are compared. The results of these comparisons indicate the need for expanding the scope of existing travel forecasting models to explicit considerations of trip chaining behavior. (Author/TRRL)

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• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    

  Pergamon Press, Incorporated

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• Authors:
  • Adler, T
  • Ben-Akiva, Moshe
• Publication Date: 1979-9

Media Info

• Features: References; Tables;
• Pagination: p. 243-257
• Serial:
  • Transportation Research Part B: Methodological
  • Volume: 13B
  • Issue Number: 3
  • Publisher: Elsevier
  • ISSN: 0191-2615
  • Serial URL: http://www.sciencedirect.com/science/journal/01912615

Subject/Index Terms

• TRT Terms: Alternatives analysis; Demand; Expenditures; Fares; Forecasting; Households; Logits; Mathematical models; Transportation planning; Transportation policy; Travel; Travel budgets; Travel costs; Travel demand; Travel patterns; Travel time; Urban transportation
• Uncontrolled Terms: Fare reduction; Selection; Trip
• ITRD Terms: 9000: Alternative; 224: Cost; 285: Demand (econ); 132: Forecast; 309: Household; 698: Journey; 6473: Mathematical model; 9072: Selection
• Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; Policy; Public Transportation; Society; I71: Traffic Theory;

Filing Info

• Accession Number: 00310476
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: May 7 1981 12:00AM