Modeling And Simulation Analysis Of City Regional Road Network Based On Improved Cellular Transmission Model

The Cell Transmission Model (CTM) which acts as a typical macro simulation model oftraffic flow, provides an effective method for the research of traffic flow in city road network.In this paper, we construct the regional road network model with the Variable CellTransmission Model (VCTM) for analyzing the traffic flow phenomenon in different trafficconditions by simulation and modeling, which is the basis of improving and evaluating thetraffic management schemes. The main research work and results of this dissertation aresummarized as follows:（1）According to the principle and the characteristics of traffic flow, the principle oftraffic flow simulation is described based on CTM in detail. Moreover, the simulation modelof traffic flow for city road is established, which is employed to simulate and analyze the twostates of free and congestion flow.（2）By considering the Hysteresis phenomenon, the VCTM is designed for simulatingthe traffic flow for simple section of city road. The analyzing results show that the model ismore practical and conforms to the observed phenomena in traffic flow.（3）For urban regional road network, the simulation model based on VCTM isestablished by analyzing the traffic flow characteristics. According to minimum averagevehicle delay time, the intersection channelization and signal timing algorithm is designed.The above model and algorithm are applied to simulate the traffic flow evolution andcharacteristics under the congestion and free flow states. The simulation and analyzing resultsshow that the proposed algorithm can enhance overall efficiency and capacity of road.