1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Alberta, 6-106 Natural Resources Engineering Facility (NREF), Edmonton, Alberta, Canada T6G 2W2.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Alberta, 3-005 NREF, Edmonton, Alberta, Canada T6G 2W2 (corresponding author).
3. Research Engineer, California Partners for Advanced Transportation TecHnology (PATH), Univ. of California, Berkeley, 1357 S. 46th St., Richmond, CA 94804-4648.