Based on the Research of Simulation System of City Traffic Model

In this paper, according to three major elements of road network "the collection of nodes, sections and the weight of road, established a combination model of static and dynamic of urban network based on graph theory. The model used the shortest travel time as the objective function for optimal path planning, focused on the analysis of link travel time, travel time is divided into free travel time of sections and intersection delay time to discuss and study. Finally, the Floyd algorithm was used to simulate this network model, in order to prove the effectiveness of the network model.