Effects of Crosswalk Location and Pedestrian Volume on Entry Capacity of Roundabouts
Effects of Crosswalk Location and Pedestrian Volume on Entry Capacity of Roundabouts
复制标题
人行横道位置和行人流量对环岛通行能力的影响
DOI：
10.1260/2046-0430.2.1.31
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发表时间：
2013
影响因子：
--
通讯作者：
R. Cheu
中科院分区：
文献类型：
--
作者：
C. Duran;R. Cheu
在绕行时，车辆必须让路给走人行横道的行人。在环形交叉口上使用人行横道的行人减少了该交叉口的通行能力。本研究采用标定微观交通仿真模型，研究人行横道位置和人流量对双车道进路进入双车道回旋处通行能力的影响。仿真结果表明：(1)在相同人流量下，距离退让线上游较远的人行横道对通行能力的影响较小，但距离退让线上游超过3车长的人行横道对通行能力的影响不显著；（ii）在相同的人行横道位置和冲突的体量下，通行能力随行人数量的增加而减小，但边际减少量随行人数量的增加而减小。建立了行人进入容量调节因子随冲突体积变化的线性回归方程。调整因子低于《公路通行能力手册2010》提供的数值，该手册是根据德国的研究得出的。
At roundabout approaches, vehicles must yield to pedestrians who are using crosswalks. The presence of pedestrians using the crosswalk at a roundabout approach thus decreases the entry capacity of the approach. This research used a calibrated microscopic traffic simulation model to study the effect of crosswalk location and pedestrian volume on the capacity of a two-lane approach entering a two-lane roundabout. The simulation results show that (i) at the same pedestrian volume, the crosswalk located further upstream from the yield line causes a smaller magnitude of reduction in the entry capacity, but there is no significant change in the entry capacity when the crosswalk is beyond three car-length upstream from the yield line; (ii) for the same crosswalk location and conflicting volume, the entry capacity reduces with increasing pedestrian volume, but the marginal reduction diminishes with increasing pedestrian volume. Linear regression equations for entry capacity adjustment factor for pedestrians as a function of conflicting volume have been developed. The adjustment factors are found to be lower than the values provided by the Highway Capacity Manual 2010 which are based on research conducted in Germany.