1. Associate Professor, School of Civil Engineering, Zhengzhou Univ., Zhengzhou, Henan 450001, China.
2. Professor, Jiangsu Key Laboratory of Urban ITS, Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies, Southeast Univ., Jiangsu 210096, China.
3. Associate Professor, School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China (corresponding author).