1. Lecturer, Beijing Key Laboratory of Traffic Engineering, Beijing Univ. of Technology, Beijing 100124, China; State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong Univ., Beijing 100044, China. ORCID: .
2. Professor, State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong Univ., Beijing 100044, China (corresponding author).
3. Professor, State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong Univ., Beijing 100044, China.
4. Professor, Dept. of Civil and Environmental Engineering, National Univ. of Singapore, Singapore 117576.