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Capacity and Delay Estimation for Roundabouts Using Conflict Theory

机译:使用冲突理论的回旋处通行能力和延误估计

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摘要

To estimate the capacity of roundabouts more accurately, the priority rank of each stream is determined through the classification technique given in the Highway Capacity Manual 2010 (HCM2010), which is based on macroscopical analysis of the relationship between entry flow and circulating flow. Then a conflict matrix is established using the additive conflict flow method and by considering the impacts of traffic characteristics and limited priority with high volume. Correspondingly, the conflict relationships of streams are built using probability theory. Furthermore, the entry capacity model of roundabouts is built, and sensitivity analysis is conducted on the model parameters. Finally, the entrance delay model is derived using queuing theory, and the proposed capacity model is compared with the model proposed by Wu and that in the HCM2010. The results show that the capacity calculated by the proposed model is lower than the others for an A-type roundabout, while it is basically consistent with the estimated values from HCM2010 for a B-type roundabout.
机译:为了更准确地估算环形交叉路口的通行能力,通过基于《公路通行能力手册2010》(HCM2010)中给出的分类技术确定每个河流的优先等级,该分类技术是基于对入流与环流之间关系的宏观分析。然后使用加性冲突流方法并考虑交通特性和高流量限制的优先级的影响,建立冲突矩阵。相应地,利用概率论建立流的冲突关系。此外,建立了回旋处的通行能力模型,并对模型参数进行了敏感性分析。最后,利用排队论推导了入口延误模型,并将所提出的容量模型与Wu和HCM2010中提出的模型进行了比较。结果表明,所提出的模型对A型环岛的通行能力低于其他模型,但与HCM2010对B型环岛的估计值基本一致。

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