1. Candidate, 422 School of Transportation, Southeast Univ., 2 Southeast University Rd., Jiangning District, Nanjing, Jiangsu 211189, China.
2. Postdoctoral Research Fellow, 422 School of Transportation, Southeast Univ., 2 Southeast University Rd., Jiangning District, Nanjing, Jiangsu 211189, China.
3. Professor, 406 School of Transportation, Southeast Univ., 2 Southeast University Rd., Jiangning District, Nanjing, Jiangsu 211189, China (corresponding author).
4. Associate Professor, College of Civil Engineering, Nanjing Forestry Univ., 159# Longpan, Nanjing 210037, China.