1. School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China
2. School of Traffic Engineering, East China Jiaotong University, Nanchang 330013, China
3. Department of Regional Economics and Cultural Heritage, 2012DE Haarlem, Province of North Holland, The Netherlands
4. School of Systems Science, Beijing Jiaotong University, Beijing 100044, China
5. School of Management, Huazhong University of Science and Technology, Wuhan 430074, China