1. School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang, People’s Republic of China
2. School of Transportation, Southeast University, Nanjing, People’s Republic of China
3. School of Civil and Environmental Engineering, Queensland University of Technology, Brisbane, Australia
4. Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People’s Republic of China
5. Department of Computer Science and Information Technology, La Trobe University, Melbourne, Australia
6. Hebei Provincial Communications Planning, Design and Research Institute Co., Ltd, Shijiazhuang, People’s Republic of China