基于用户均衡与系统最优的交通网络流模型

The Comparative Analysis of Traffic Network Model under User Equilibrium and System Optimum

交通网络分配遵循用户均衡和系统最优两个重要原则,文章首先阐述UE和SO两种原则的定义以及最优化模型的建立。通过对两种模型最优化条件的分析,找出其在路径费用函数构造上的差异进而推导出两种模型间的转化关系。最后将UE模型和SO模型进行比较,结合实例得出不同拥挤程度下UE与SO的差异,结合比较结果得出结论,并为路径选择以及行车诱导系统的模式选择提供理论依据。

User equilibrium （UE） and system optimum （SO） are two main principles in the process of traffic assign- ment. The paper firstly explains the concepts of UE and SO, and establishes the model. By the analysis of optimal condition, the differences of travel consumption in the models are found, so that the transforma- tion relationship between UE and SO is deduced. Comparing the UE model and OS model, the conclusion and suggestion are given.