1. Institute of Transportation Studies, UCLA Luskin School of Public Affairs, Los Angeles, CA, USA
2. School of Planning, Public Policy, and Management, University of Oregon, Eugene, OR, USA
3. Edward J. Bloustein School of Planning and Public Policy, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
4. Department of Civil and Environmental Engineering, California Polytechnic State University, San Luis Obispo, CA, USA