不同交通流状况下的交叉口信号控制策略

从交叉口信号的传统控制与现代控制两个层面，对不同交通流状况下的交叉口控制策略选取问题进行了较为全面深入的分析研究，分别讨论了定时控制、感应控制、模糊控制与最优控制在交叉口信号控制中的适用条件，并着重阐述了饱和交通状况下路口信号的最优控制方法，从而有效地解决了使用模糊控制技术进行交叉口信号控制时存在的一些问题。研究结果表明，在饱和交通状况下单纯依靠通过车辆数与排队车辆数来实施模糊控制并非合理，此时需要进一步考虑车道饱和流量因素的影响。

Signal Control Strategies for Intersection under Different Traffic Flow

For intersection under the different traffic flow, the selection of the signal control strategy is fully analysed and researched in terms of conventional and modem signal control. The adaptive conditions of the fixed-time control, vehicle actuated control, fuzzy control and optimal control to the intersection signal control are discussed respectively. The optimal control method for the intersection under saturated traffic flow condition is specially presented. Some problems of the signal control with the fuzzy control are effectively resolved. Research results show that exerting fuzzy signal control strategy only with arrivals and queue of vehicles is not reasonable, especially under the saturated traffic flow. Roadway saturation flow is an important influence factor to be considered.