APPLICATION OF ITERATIVE SCALING METHOD TO CALIBRATE A COMBINED TRIP DISTRIBUTION AND MODE CHOICE MODEL

The Generalized Iterative Scaling Method of Darroch and Ratcliff (1972) is a broad spectrum approach to calibrating trip distribution models (Wang, 1983); it is most significant when the function form of a deterrant effect is unknown. Existing applications show that if additional decision factors are considered sequentially, more dimensions of the model are correspondingly required. However, it has been recognized that the travel decisions of why, where, how and which route to follow are made simultaneously. Therefore, this study first extends the current 3-dimensional procedure (Evans and Kirby, 1974) for trip ditribution problem to a combined trip distribution and mode choice model, and second, shows that only if the 3-dimensional approach is employed can the model be representative of siumltaneous decisions. The calibration and prediction procedures are specified and a numerical evaluation of the model is provided.

• Availability:
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• Authors:
  • Wang, H F
• Publication Date: 1987-8

Media Info

• Features: References; Tables;
• Pagination: p. 281-294
• Serial:
  • LOGISTICS AND TRANSPORTATION REVIEW
  • Volume: 23
  • Issue Number: 3

Subject/Index Terms

• TRT Terms: Mathematical models; Mode choice; Trip distribution
• Uncontrolled Terms: Models
• Old TRIS Terms: Modal selection
• Subject Areas: Highways; Planning and Forecasting; Society; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00474801
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 31 1987 12:00AM