The Influence of Assignment Parameters on Estimation of Travel Time Coefficients in a Mode Choice Model



The Influence of Assignment Parameters on Estimation of Travel Time Coefficients in a Mode Choice Model

Authors

BARADARAN S, Royal Institute of Technology, Sweden

Description

The transportation modelling problem is associated with the prediction of large number of individual choices expressed in terms of aggregated model parameters denoting the discrete behaviour of members of the population. The individual choice in turn is a

Abstract

The transportation modelling problem is associated with the prediction of large number of individual choices expressed in terms of aggregated model parameters denoting the discrete behaviour of members of the population. The individual choice in turn is a sequential process of making decisions, while the decisions are made based on the expected utility of the selected choice in the choice set. This is the Case if one can assume ihat. the individuals are utility maximizers. A model approached by utility maximization theory comprises a utility function for each and every one of the alternatives available to the individual. These functions will in turn contain a linear or non-linear (A Karlstr6m 1998) arithmetical set of variables, to measure the utility of each alternative. In the case of mode choice, the choice set for a traveller is limited to a distinct number of alternatives e.g. travel by car, public transport or walk to the destination.

This paper focuses on the public transport altemative in a mode choice model and its time-based variables represented in the transit utility function. Consider a transit traveller who wants to plan her trip to work. The traveller in several different ways can plan this trip dependent on the available transit modes to her. She can for example choose to:

* walk to the bus station, take bus hr. Y, change to subway for station X, walk to work.

or

* walk to the bus station, take bus hr. Y, wait I0 minutes, take bus hr. Z for station X, walk to work.

Publisher

Association for European Transport