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By incorporating characteristics of the built environment into models of travel behavior, much can be said about household travel distances, automobile ownership, and mode choice. This research investigates the relative significance of a variety of measures of urban form, both at trip-makers' home neighborhoods and at trip ends. The travel data come from the 1990 San Francisco Bay Area Travel Surveys, and the land-use data are largely constructed from hectare-level descriptions provided by the Association of Bay Area Governments. After controlling for demographic characteristics, the measures of accessibility, land use mixing, and land use balance proved to be highly statistically significant and influential in their impact on household vehicle miles traveled (VMT), automobile ownership, and mode choice. In contrast, under the majority of models (with the important exception of the vehicle-ownership models), density's impact was