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