EMME/2 Support Center, Haldenstrasse 16, CH-2558 Aegerten, Switzerland
March 1993
Revised April 1995
Revised November 1996
Abstract:
In this note we look at a logit type choice model for simultaneously choosing the N-1 intermediate destinations in an N-legged activity chain. We reformulate the model in terms of matrix products, and show how the demand matrices corresponding to the individual legs of the activity chain can be computed efficiently. An extension of the model for simultaneous destination and mode choice is also discussed, as well as the special case of mixed mode trip chains.
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Contents
- Introduction
- The Three-Leg Activity Chain
- Multi-Leg Activity Chains
- Combined Mode and Destination Choice
- Mixed-Mode Trip Chains
- Conclusions
- References
Introduction
Traditional trip distribution models models typically consider only trips to a single destination for the purpose of carrying out a single activity (such as work, shopping, leisure, ...). While this simple model of a trip represents quite well a large fraction of the trips that are subject of travel demand models, many ``real life'' trips combine more than one activity carried out at more than one destination (such as stopping at the shopping center on the way back from work). For this purpose, trip distribution models based on activity chains have been developed and used extensively in the past (see e.g. Adler and Ben-Akiva 1979, Clarke et al. 1981, Pas 1984, ...). Most of these models are stated in the form of a multinomial logit
