1. Department of Civil, Architectural, and Environmental Engineering, University of Texas at Austin, Stop C1761, 301 East Dean Keeton Street, Austin, TX 78712-1172.
2. Center for Transportation Research, University of Texas at Austin, Suite 4.202, 1616 Guadalupe Street, Austin, TX 78701.
3. Room B58, Department of Civil and Environmental Engineering, West Virginia University, Engineering Sciences Building, P.O. Box 6103, Morgantown, WV 26506.
4. Room 621, Department of Civil and Environmental Engineering, West Virginia University, Engineering Sciences Building, P.O. Box 6103, Morgantown, WV 26506.