1. Chongqing Key Laboratory of Traffic & Transportation, College of Traffic and Transportation, Chongqing Jiaotong University, Chongqing, People’s Republic of China
2. Department of Civil and Architectural Engineering and Mechanics, University of Arizona, Tucson, AZ
3. School of Transportation and Logistics, Southwest Jiaotong University, Chengdu, Sichuan, People’s Republic of China
4. National United Engineering Laboratory of Integrated and Intelligent Transportation, Chengdu, Sichuan, People’s Republic of China