关键词: 城市交通, 多向堵塞, 增量加载, 节点结构, 路径选择

Abstract:

In the urban road network, node resistance influence the result of route choice and traffic assignment greatly. To make up for the deficiency of the research on the impedance of the node, optimize traffic assignment method, this paper analyses the existing node structure model. From which the Supernode model based on multi- direction congestion on the basis of the super- node structure and the model algorithm is established and designed after analyzing the turning congestion effort. The model improves the method to express the turning flow and resistance, introducing the principle of route choice. At last, the paper demonstrates traffic assignment process considering turn resistance and not, after that analyses the route resistance variation trend, flow on link and turn of the example network by the capacity restrictionincremental assighment method. The result of numerical example shows the model is more reasonable and effective in expressing the trend of turn resistance and influence from the multi-direction congestion of node.

Key words: urban traffic, multi-direction congestion, incremental assignment, node structure, route choice