1. School of Transportation and Logistics, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
2. National Engineering Laboratory of Integrated Transportation Big Data Application Technology, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
3. National United Engineering Laboratory of Integrated and Intelligent Transportation, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
4. Institute of System Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China