1. The school of Transportation and Logistics and Laboratory of Comprehensive Transportation Intelligentization, Southwest Jiaotong University, Beiyiduan, Chengdu, Sichuan, P.R. China
2. The school of Transportation and Logistics and Laboratory of Comprehensive Transportation Intelligentization, Southwest Jiaotong University, Erhuanlu Beiyiduan, Chengdu, Sichuan, P.R. China
3. Department of Traffic and Road Engineering, Civil Engineering College, Hunan University, Lushan South Road, Changsha, Hunan Province, P.R. China
4. Department of Transport & Planning, Faculty of Civil Engineering and Geosciences, Delft University of Technology, CN Delft, The Netherlands