1. Research Scientist, Virginia Center for Transportation Innovation and Research, 530 Edgemont Rd., Charlottesville, VA 22903.
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, 325 John D. Tickle Building, Knoxville, TN 37996 (corresponding author).
3. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, 325 John D. Tickle Building, Knoxville, TN 37996.
4. Research Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, 325 John D. Tickle Building, Knoxville, TN 37996.
5. Postdoctoral Researcher, Dept. of Civil and Environmental Engineering, Univ. of Tennessee, 325 John D. Tickle Building, Knoxville, TN 37996.
6. Graduate Student, Dept. of Chemistry, Univ. of Tennessee, 552 Buehler Hall, Knoxville, TN 37996.