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为了研究环岛内车辆换道行为频繁发生影响环岛内交通运行效率,从而引发交通事故并阻断整个交通等问题,考虑到环岛和高速公路类似,进出车辆都在同一侧发生且车辆只有交织冲突,将环岛看成一条短的环形高速公路,用高速公路交通流模型来分析环岛内的交通流特性,并基于现有换道交通流理论,通过引入换道强度变量ε(t,x)对无信号控制的环岛内交通行为进行研究,分析其运行特性,建立考虑换道行为的多车道环岛交通流模型。研究结果表明:引入换道强度变量的无信号环岛交通流模型能真实反映环岛内交通情况;通过数值例子也验证了该模型的有效性,证实频繁的换道行为会降低环岛的车辆实际通过能力。研究是对现有文献中无信号控制环岛交通流建模的补充。
In order to study the lane changing behavior of vehicles around the island frequently affect the efficiency of traffic operations around the island, resulting in traffic accidents and blocking the entire traffic and other issues, taking into account the island and the highway similar to the entry and exit vehicles are on the same side and the vehicle only intertwined conflict, The roundabout is regarded as a short circular highway, and the freeway traffic flow model is used to analyze the traffic flow characteristics in the roundabout. Based on the existing lane changing traffic flow theory, by introducing the laneway strength variable ε (t, x) Signal-controlled traffic behavior around the island, analyze its operating characteristics, and establish a multi-lane traffic flow model considering the lane changing behavior. The results show that the traffic flow around the island can truly reflect the traffic flow around the island by introducing the lane-changing strength variable. The numerical example also verifies the effectiveness of the model and confirms that the frequent lane changing will reduce the traffic passing capacity around the island . The research complements the modeling of traffic flow around the island without signal control in the existing literature.