1. Multimedia and Intelligent Software Technology Key Laboratory, College of Metropolitan Transportation, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
2. Beijing Key Laboratory of Traffic Engineering, College of Metropolitan Transportation, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing 100124, China
3. Department of Civil and Environmental Engineering, University of Louisville, W.S. Speed Building, Room 111, Louisville, KY 40292, USA
4. Department of Project Investment, Beijing Shoufa Investment Holding Company, Ltd., BCHD Building, No. 9 Liuliqiao South Avenue, Fengtai District, Beijing 100161, China