Estimation and Testing of a Combined Network Equilibrium Model of Travel Choices for the Chicago Region

Abstract

Traditionally, the travel forecasting process has been viewed as a sequence of travel forecasts beginning with trip origin and destination frequencies followed by origin — destination choice, mode choice and then route choice. Consideration of each of these choices separately has led to the development of different models representing each dimension of the tripmaker’s choice process. The actual travel forecast, then, results from solving a sequence of separate models which have come to be known as trip generation, trip distribution, mode split and trip assignment.