1. Research Assistant, Dept. of Civil and Environmental Engineering, Center for Advanced Multimodal Mobility Solutions and Education, Univ. of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223.
2. Director and Associate Professor, Dept. of Civil and Environmental Engineering, USDOT Center for Advanced Multimodal Mobility Solutions and Education, Univ. of North Carolina at Charlotte, EPIC Bldg., Room 3261, 9201 University City Blvd., Charlotte, NC 28223 (corresponding author).