1. Department of Transport Engineering, School of Civil Engineering, Zhengzhou University, Zhengzhou, Henan, China;
2. Jiangsu Key Lab of Urban ITS and Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies, School of Transportation, Southeast University, Nanjing, Jiangsu, China;
3. Institute of Transport Studies, Department of Civil Engineering, Monash University, Clayton, VIC, Australia