Evaluation Model of Open Community Road Network based on Network Flow

At present, various types of closed-type communities are prevalent in China. The internal road systems of some closed-type communities are dense and perfect, and they have the ability to access external road networks and relieve urban traffic pressure. The existence of these closed communities has destroyed the road network structure of the city and, to a certain extent, caused waste of internal road resources. This paper proposes to establish a multi-end maximum flow model of road network from three aspects: road network multi-end maximum flow, community internal road diversion ratio and road network reliability. Then, the multi-terminal maximum flow problem is transformed into the single-ended maximum flow problem, and the multi-end maximum flow of the outgoing network is solved, thereby evaluating the influence of the internal roads in the open community on the surrounding road traffic conditions.