1. Research Scholar, Logistic Research Center, Shanghai Maritime Univ., Shanghai 200136, People’s Republic of China (corresponding author).
2. Professor, School of Traffic and Transportation, Beijing Jiaotong Univ., Beijing 100044, People’s Republic of China.
3. Professor, State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong Univ., Beijing 100044, People’s Republic of China.
4. Associate Professor, School of Civil and Environmental Engineering, Nanyang Technological Univ., 50 Nanyang Ave., Singapore 639798.