1. Associate Professor, Intelligent Transport System Research Center, Southeast Univ., No. 35 Jinxianghe Rd., Nanjing 210096, China.
2. Professor, Intelligent Transport System Research Center, Southeast Univ., No. 35 Jinxianghe Rd., Nanjing 210096, China.
3. Lecturer, Dept. of Civil Engineering, Monash Univ., Clayton, VIC 3800, Australia (corresponding author).
4. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of South Florida, 4202E. Fowler Ave. ENC 3209, Tampa, FL 33620.