Estimation and Implementation of a Simultaneous Trip Generation Model for Multiple Travel Purposes – A New Approach

This paper includes sub-models for access to car, mode/destination choice for 5 travel purposes and trip generation. A novel approach to trip generation is used. It is based on a model estimated as a Hurdle-Poisson model for the total number of sojourns simultaneously with a multinomial logit model for the distribution of sojourns by purpose. A special procedure converts sojourns to home based tours with one or two destinations. In our view the method used in RegMod represents a reasonable trade-off between realistic representation of travel behavior and execution speed for large scale travel demand models.