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为研究过饱和信号交叉口排队溢出状态下单周期通过展宽段车辆的区段延误模型,首先介绍了3大经典延误模型,提出了3大延误模型均未考虑展宽段长度和饱和流率的波动问题。其次,以展宽段为研究对象,在经典延误模型理论的基础上,推导出了展宽段区段延误模型。最后,从公式推导计算和VISSIM仿真两个方面对优化模型和定数理论延误模型进行了对比。结果表明:该模型能够有效地反映展宽段溢出状态下产生的区段延误,可为展宽段的科学设计提供理论基础。
In order to study the delay model of a single-cycle vehicle passing through widening section under the condition of queue overflow at a supersaturated signalized intersection, three classic delay models are introduced first, and three models are proposed to delay the fluctuation of the length and saturated flow rate problem. Secondly, based on the classical delay model theory, the extended delay segment is considered as the research object. Finally, the delay model between the optimization model and the fixed number theory is compared from two aspects of formula derivation and VISSIM simulation. The results show that this model can effectively reflect the segment delay caused by spillover of spanning segment and provide a theoretical basis for the scientific design of spanning segment.