1. School of Transportation and Logistics, Southwest Jiaotong University, Chengdu, Sichuan, People’s Republic of China
2. National United Engineering Laboratory of Integrated and Intelligent Transportation, Southwest Jiaotong University, Chengdu Sichuan, People’s Republic of China
3. Department of Systems Engineering and Engineering Management, City University of Hong Kong, Kowloon Tong, Hong Kong, People’s Republic of China