从出行者的出行需求出发,在不考虑市内收费站存在的情况下,针对不同道路条件下不同流量之间相互影响的因素,构建路段阻抗函数。在此基础上,对交叉口进口道非饱和状态下的延误进行分析,构造了城市交通混合流非饱和状态下的节点阻抗函数,采用最大似然法对参数进行标定。最后通过简单算例来验证新的综合交通阻抗函数在城市动态交通分配过程中具有一定的科学性与合理性。 Based on the travel demand of travelers, the section impedance function is constructed for the factors that affect the traffic flow under different road conditions without considering the existence of toll stations in the city. On the basis of this, the delay of non-saturation state at the intersection inlet is analyzed, and the node impedance function under the non-saturation state of urban traffic mixture flow is constructed. The maximum likelihood method is used to calibrate the parameters. Finally, a simple example is used to verify that the new integrated traffic impedance function is scientific and reasonable in the process of urban dynamic traffic assignment.