1. Ministry of Education Key Laboratory for Urban Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, 3 Shangyuan Cun, Haidian District, Beijing 100044, China
2. College of Science, Engineering, and Technology, Texas Southern University, 3100 Cleburne Avenue, Houston, TX 77004
3. Beijing Transportation Research Center, 9 Liuliqiao South Road, Fengtai District, Beijing 100073, China
4. Beijing Transport Energy and Environment Center, 9 Liuliqiao South Road, Fengtai District, Beijing 100073, China