A Congestion Pricing Model for Urban Central Area and Its Simulation Algorithm

For the purpose of relieving congestion situation in urban central area,a congestion pricing model for urban central area is set up,in which the domestic regional road network is taken as the research object, the minimum delay time of all vehicles in the selected road network as the optimization objective,congestion charging price as the decision- making variable,and saturation of the road network and signal timing as the constraint conditions. Then,the simulation algorithm and solving steps based on VISSIM are given. The result of simulation case study illustrates that( 1) the optimal pricing and reasonable signal timing scheme can be obtained by the presented model for urban central area;( 2) the computer simulation method can greatly reduce the solving difficulty and visually provide a rationale for the traffic management department to make congestion pricing schemes.