过饱和信号交叉口的多目标控制模型

过饱和条件下信号交叉口优化控制往往是采用可以接受的最大信号周期，忽略了其他性能指标，并非真正意义上的最优。本文以典型的十字交叉口、四相位信号控制为例，根据车辆初始排队长度、车辆实时到达率和离开率，通过对各进口道的延误、通行能力及排队长度分析，建立了过饱和条件下以平均车辆延误最小、通行能力最大、平均车辆排队长度最小为目标函数的多目标信号优化控制模型。该模型以实时交通流的到达情况为依据进行实时优化，不仅考虑了交叉口的交通效率，还考虑了其效益指标，为研究过饱和条件下交叉口的多目标分析提供了有用信息。

Multi-objective control model of over-saturated signalized intersection

The cycle of over-saturated signalized intersection is often adopted the maximum length within acceptable range, It is not the true sense of the optimal because of neglecting other performance indexs. Take typical cross intersection and four-phase traffic signal controlling as example, this paper presents an optimization model to maximize capacity and to minimize average vehicle delay as well as average vehicle queue length by analyzing and computing the delay, capacity and queue length of every incoming lane of every phase in phase sequence order according to the initial queue length, real-time arrival rate and departure rate .The model takes both transport efficiency and effectiveness into account ,which provides useful information for multi-objective analysis in over-saturated intersection.