1. Ph.D. Candidate, School of Transportation, Southeast Univ., Nanjing, Jiangsu 210096, China.
2. Engineer, Chongqing Municipal Research Institute of Design, Yanghe Rd. No. 69, Jiangbei District, Chongqing 404100, China.
3. Master Student, School of Transportation, Southeast Univ., Nanjing, Jiangsu 210096, China.
4. Professor, School of Transportation, Southeast Univ., Nanjing, Jiangsu 210096, China (corresponding author).