1. College of Civil Engineering and Architecture, Zhejiang University, No. 388, Yuhangtang Road, Hangzhou, 310058, China.
2. College of Design, Construction and Planning, University of Florida, 431 Arch Building, P.O. Box 115706, Gainesville, FL 32611-5706, USA.
3. Urban Transport Institute, China Academy of Urban Planning and Design, No. 9, San Li He Road, Beijing, 100044, China.
4. School of Transportation Engineering, Tongji University, Shanghai, 201804, China.