This paper was supported by a grant from the U.S. Department of Transportation’s Cooperative Mobility for Competitive Megaregions University Transportation Center. However, the U.S. Government assumes no liability for the contents or use thereof. Kelly Porter and Leena Reese of the CAMPO kindly provided the PPGIS database. Additionally, this work benefited from the comments of five anonymous reviewers through the TRB Public Involvement Committee (ADA60).