Application of Discrete Mathematics in Urban Transportation System Analysis

1 School of Automotive Engineering, Dalian University of Technology, Dalian 116024, China 2 Transportation Management College, Dalian Maritime University, Dalian 116024, China 3Department of Mechanical and Manufacturing Engineering, Aalborg University, Denmark 4 Faculty of Technology, Policy and Management, Delft University of Technology, Delft, The Netherlands 5 College of Transportation, Jilin University, Changchun 30022, China