1. Transportation Engineering College, Dalian Maritime University, Dalian, People's Republic of China
2. Urban Planning Group, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, Netherlands
3. Department of Air Transportation Management, NUAA, Nanjing, People’s Republic of China
4. School of Automotive Engineering, Dalian University of Technology, Dalian, People’s Republic of China
5. Department of Traffic Engineering & Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai, People's Republic of China