1. Assistant Professor, Dept. of Civil and Environmental Engineering, The Univ. of Tennessee, Knoxville, TN 37996 (corresponding author).
2. Associate Professor, Louisiana Transportation Research Center, Louisiana State Univ., 4101 Gourrier Ave., Baton Rouge, LA 70808.
3. Project Manager, ACTA Inc., 2790 Skypark Dr., Suite 310, Torrance, CA 90503.