1. Chongqing Key Laboratory of Intelligent Integrated and Multidimensional Transportation System, Chongqing Jiaotong University, Chongqing, China
2. School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha, China
3. Department of Traffic Engineering and the Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai, China
4. College of Automation, Key Laboratory of Intelligent Air-Ground Cooperative Control for Universities in Chongqing, Chongqing University of Posts and Telecommunications, Chongqing, China