1. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, China
2. Guangdong Key Laboratory of Urban Informatics, Shenzhen University, Shenzhen, China
3. Research Institute of Urban Smart Transportation and Safety Maintenance, Shenzhen University, Shenzhen, China
4. Faculty of Geo-Information Science and Earth Observation, University of Twente, Enschede, The Netherlands