1. Guangxi Key Laboratory of ITS, Guilin University of Electronic Technology, School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin, China
2. College of Automobile and Traffic Engineering, Nanjing Forestry University, Nanjing, China
3. Faculty of Maritime and Transportation, Ningbo University, Ningbo, China
4. School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou, China