1. Professor, Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing Univ. of Technology, Beijing 100022, China (corresponding author).
2. Ph.D. Candidate, School of Transportation, Jilin Univ., Changchun 130025, China.
3. Ph.D. Candidate, School of Transportation, Southeast Univ., Nanjing 211189, China.
4. Ph.D. Candidate, School of Civil Engineering, Chongqing Univ., Chongqing 400044, China.