1. Guangzhou Urban Planning & Design Survey Research Institute, Guangzhou, Guangdong 510060, China
2. Guangdong Enterprise Key Laboratory for Urban Sensing, Monitoring and Early Warning, Guangzhou, Guangdong 510060, China
3. Production & Technology Department, Guangzhou Municipal Group Co., Ltd, Guangzhou, Guangdong 410060, China
4. Guicheng Transportation Service Institute of Nanhai District Transportation Bureau, Foshan, Guangdong 528253, China
5. Guangzhou Municipal Engineering Design & Research Institute Co., Ltd, Guangzhou, Guangdong 510060, China