Maintaining Mobility in Substantial Urban Growth Futures

Integrated land use/transport models traditionally follow a simple integration concept: The land use model provides the origins and destinations of trips, and the travel demand model provides aggregate travel times between zones. High levels of congestion and the limitation of travel budgets, however, require travelers to scrutinize travel options and housing locations more carefully. In this paper, a microscopic integration of land use and transport models is proposed that - for the first time - is capable of capturing travel times and constraints at the level of the individual traveler. This level of integration allows choosing housing locations from which workplaces of all household members are accessible. In addition, discretionary travel can be limited to a household's travel budget after mandatory trips have been completed. The model is expected to represent travel and housing location choice constraints more realistically under high congestion/high cost scenarios.