1. Ph.D. Student, School of Traffic and Transportation Engineering, Changsha Univ. of Science and Technology, Changsha, Hunan 410114, China.
2. Master’s Student, School of Traffic and Transportation Engineering, Changsha Univ. of Science and Technology, Changsha, Hunan 410114, China.
3. Professor, Hunan Provincial Key Laboratory of Smart Roadway and Cooperative Vehicle-Infrastructure Systems, Changsha Univ. of Science and Technology, Changsha, Hunan 410114, China (corresponding author).
4. Professor, School of Transportation Engineering, Chongqing Jiaotong Univ., Chongqing 400074, China.