Aggregation in Spatial Choice Modeling

This paper presents a spatial interaction model based on the utilitarian choice model that describes the individual tripmakers' choice of destination locations for their trips. The use of asymptotic properties of the distribution of the perceived utility of each destination zone yielded, a multinominat probit model of destination zone choice. This multinominial probit structure allowed the model to assume arbitrary degrees of similarities in the individual's preceptions of destination locations within or among the traffic zones. A few additional assumptions made it possible to generalize this destination zone choice model to a spatial interaction model representing relative frequencies of interzonal movements. The numerical analysis showed that the violation of an asymptotic assumption used in the model derivation does not cause significant errors in the model.