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为了均衡公交优先信号控制对交叉口延误的负面影响,基于延长绿灯时间、缩短红灯时间和插入优先相位策略,分别提出了3种优先策略的绿时损失均衡方法。采用延误叠加分析方法,考虑进口道车流累积疏散和停车起动过程,分析了相位绿时左端和右端时长变化产生的延误增减,构建了交叉口损失均衡下的延误计算模型。以交叉口减少人均总延误最大为目标函数,以其余相位车辆正常通行为约束条件,建立了考虑绿时损失均衡的公交优先配时优化模型,对各相位绿时均衡参数进行优化,并基于Frank-Wolfe算法,利用对角化技术设计了求解算法。结果表明:新的延误计算方法可更加准确地描述公交优先信号交叉口的延误变化;配时优化模型可有效地均衡各非优先相位的绿时损失,降低交叉口人的总延误。
In order to balance the negative impact of bus priority signal control on the intersection delay, the green time loss equalization methods of three priority strategies are proposed based on extending the green light time, shortening the red light time and inserting the priority phase. The method of delay overlay analysis is used to consider the accumulative evacuation and stop-start process of imported road flow. The delay changes caused by the change of the left and right end of phase green are analyzed. The delay calculation model of the intersection loss is constructed. Taking the maximum total delay of reducing intersections as the objective function, the optimization model of bus priority allocation considering the green time loss equalization is established based on the constraints of the normal traffic of other phases. The phase equilibrium parameters are optimized based on Frank -Wolfe algorithm, the use of diagonalization technology designed to solve the algorithm. The results show that the new delay calculation method can describe the delay change of bus priority signal intersection more accurately. Timing optimization model can effectively balance the green time loss of each non-priority phase and reduce the total delay of people at intersection.