1. Research Assistant Professor, Center for Transportation Research, College of Engineering, Univ. of Tennessee, 600 Henley St., Knoxville, TN 37996 (corresponding author).
2. Postdoctoral Research Associate, Center for Transportation Research, College of Engineering, Univ. of Tennessee, 600 Henley St., Knoxville, TN 37996.
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, 419 John D. Tickle Engineering Bldg., 851 Neyland Dr., Knoxville, TN 37996.
4. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, 419 John D. Tickle Engineering Bldg., 851 Neyland Dr., Knoxville, TN 37996.