1. Lecturer, School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China.
2. Associate Professor, School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China.
3. Professor, Dept. of Civil Engineering, Ryerson Univ., Toronto, ON, Canada M5B 2K3.
4. Senior Lecturer, Griffith School of Engineering, Griffith Univ., Southport, QLD 4222, Australia (corresponding author).