1. Department of Civil Engineering and Humphrey Institute of Public Affairs, University of Minnesota, 500 Pillsbury Drive SE, Minneapolis, MN 55455.
2. Center for Urban Studies, Portland State University, 506 SW Mill Street, Room 350, Portland, OR 97201.
3. TriMet, 4012 SE 17th Avenue, M.S. HPD2, Portland, OR 97202-3940.