1. Institute for Transportation Research and Education, North Carolina State University, Centennial Campus, Box 8601, Raleigh, NC 27695-8601.
2. 210 CME, Department of Civil and Environmental Engineering, University of Utah, 122 South Central Campus Drive, Salt Lake City, UT 84112-0561.
3. 119 CME, Department of Civil and Environmental Engineering, University of Utah, 122 South Central Campus Drive, Salt Lake City, UT 84112-0561.
4. Department of Civil, Construction, and Environmental Engineering, North Carolina State University, Campus Box 7908, Raleigh, NC 27695-7908.