1. School of Transportation and Logistics, Southwest Jiaotong University, Chengdu, Sichuan, China;
2. National Engineering Laboratory of Integrated Transportation Big Data Application Technology, Southwest Jiaotong University, Chengdu, Sichuan, China;
3. Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, USA;
4. Chongqing Key Laboration of Traffic and Transportation, Chongqing Jiaotong University, Chongqing, China;
5. School of Traffic and Transportation, Chongqing Jiaotong University, Chongqing, China