1. Principal Research Scientist, Kentucky Transportation Center, Univ. of Kentucky, 176 Raymond Bldg., Lexington, KY 40506-0281 (corresponding author).
2. Postdoctoral Research Fellow, School of Geography, Univ. College Dublin, H011 Newman Bldg., Dublin 4, Ireland. ORCID: .
3. Research Engineer, Kentucky Transportation Center, Univ. of Kentucky, 176 Raymond Bldg., Lexington, KY 40506-0281.
4. Senior Executive Research Scientist, Kentucky Transportation Center, Univ. of Kentucky, 176 Raymond Bldg., Lexington, KY 40506-0281.
5. Associate Director, Kentucky Transportation Center, Univ. of Kentucky, 176 Raymond Bldg., Lexington, KY 40506-0281.