Traffic congestion may occur in the whole road network or in local of that network, moreover, it has big possibility to arouse second congestion. Based on the Davison modified model of BRP function and the definition of road service standard, this paper analyzed the runtime of road network. Under complexity road network, the optimal path which is chosen in normal traffic environment maybe not the
... [Show full abstract] optimal solution in traffic congestion environment because of the differences of road service level and dynamic development of traffic flows in the crossroads. Considerate the reliability of the chosen path, this article built a static traffic distribution model to analysis urban transportation with macroscopic perspective, and provide suggestions for relieve urban traffic congestion.