1. Associate Professor, College of Transportation Engineering, Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji Univ., Shanghai 201804, PR China.
2. Research Assistant, College of Transportation Engineering, Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji Univ., Shanghai 201804, PR China.
3. Director, US Dept. of Transportation Center for Advanced Multimodal Mobility Solutions and Education; Professor, Dept. of Civil and Environmental Engineering, Univ. of North Carolina at Charlotte, EPIC Bldg., Room 3261, 9201 University City Blvd., Charlotte, NC 28223-0001 (corresponding author). ORCID: .