Decouple analysis on distributed architecture of urban traffic system

The establishment of traffic model suitable for ITS is an important aspect to promote the rapid development of urban traffic. The paper develops an urban traffic particle model based on practical observation of traffic flow, in which intersection is regarded as elementary granular unit and there are decoupled relations among them. Then the exercise mechanism of traffic flow is introduced, and a correlative model and its decoupled method are argued between units. Finally the paper takes practical data of two adjacent intersections for example. Signal cycle, traffic flows of each phase are used to analyze stability of elementary unit as time scale, state variables. Through computer simulation and analysis, modeling distributed traffic particle flow is feasible; the model provides theories basis for distributed architecture of intelligent transport system of cities.