1. Department of Civil and Environmental Engineering, 245 Duckering, University of Alaska–Fairbanks, 306 Tanana Loop, Fairbanks, AK 99775-5960.
2. Transportation Research Center, Farrell Hall, University of Vermont, 210 Colchester Avenue, Burlington, VT 05405.
3. Civil and Environmental Engineering, 302 Boardman Hall, University of Maine, Orono, ME 04469-5711.