University of California Transportation Center

This research is part of the project aimed at developing a model system to forecast demand for clean fuel vehicles in California, conducted by researchers at the University of California, Irvine and University of California, Davis. The objective of the research reported here is to explain annual vehicle miles of travel for each of the two vehicles in two-vehicle households as a function only of household characteristics that can be forecasted using the household sociodemographic updating model being developed as part of the personal vehicle submodel (brownstone, Bunch and Golob, 1994). The household's choice of the number of vehicles to own and the types of these vehicles, in terms of the class and vintage of each vehicle, are taken as given in this model.