1. Assistant Professor, Dept. of Management Science and Engineering, Shanghai Univ., 99 Shangda Rd., BaoShan District, Shanghai 200444, China; formerly, Ph.D. Student, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Hung Hom, Kowloon 999077, Hong Kong SAR.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Hung Hom, Kowloon 999077, Hong Kong SAR (corresponding author).
3. Ph.D. Student, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Hung Hom, Kowloon 999077, Hong Kong SAR.
4. Associate Professor, School of Transportation, Southeast Univ., Sipailou 2#, Nanjing, Jiangsu 210096, China.