1. School of Transportation and Logistics Engineering, Shandong Jiaotong Univ., Jinan, China; School of Automotive and Traffic Engineering, Jiangsu Univ., Jiangsu, China.
2. Professor, School of Automotive and Traffic Engineering, Jiangsu Univ., Jiangsu, China.
3. School of Transportation and Logistics Engineering, Shandong Jiaotong Univ., Jinan, China.
4. Professor, School of Transportation and Logistics Engineering, Shandong Jiaotong Univ., Jinan, China.