The report provides a suite of recommended strategies to reduce single-occupant vehicle traffic in the urban areas of Phoenix and Tucson, Arizona, which are presented as a travel demand management toolbox. The toolbox includes supporting research on how to deliver, monitor, and fund implementation of the strategies, and a framework for the development of performance measures to assess their effectiveness. The research effort included studies of travel behavior in Phoenix and Tucson, reviews of best-practice measures nationally, and those in use in Arizona today, and interviews with local and national TDM professionals.

This report presents the results of a study of vehicle occupancy conducted in Phoenix, Arizona to determine what factors have the greatest influence on having persons travel together to make trips in private vehicles. Although the data were collected in the Phoenix metropolitan area for the purpose of refining the MAGTPO mode split model for vehicle trips, the conclusions reached in this study of vehicle occupancy are also intended to be checked against data from other metropolitan areas.