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以避免交叉口出现死锁和减少绿灯时间浪费为目标,利用交通流波动理论,建立了一种过饱和条件下的信号交叉口协调控制的可靠性优化模型,并提供了可靠性区间的计算方法。该模型基于信号控制交叉口处不同的排队溢出形式和交通流波动状态的分类研究,以控制排队溢出形式和上下游交叉口通行能力匹配作为约束条件,以增大排队溢出缓冲时间作为优化目标。通过仿真试验表明,该策略可以减少延误24.6%,同时交叉口的死锁概率降低30%,能有效地承受过饱和交通流的冲击,提高路网的可靠性。
In order to avoid the deadlock at the intersection and reduce the waste of green light time, a reliability optimization model of signalized intersection control under supersaturated condition is established by using the theory of traffic flow fluctuation, and the calculation method of reliability interval is provided . Based on the classification of different queuing overflow forms and traffic flow fluctuations at the signalized intersection, this model controls the queuing overflow form and the traffic capacity matching at the upstream and downstream intersections as constraints, and increases the queuing overflow buffer time as the optimization objective. Simulation results show that this strategy can reduce the delay by 24.6% and reduce the probability of deadlock at intersections by 30%. It can effectively withstand the impact of saturated traffic flow and improve the reliability of road network.