礼让行人规则下信号交叉口右转专用车道通行能力

Capacity of exclusive right-turn lanes under rule of yielding to pedestrians at signal intersections

礼让行人规则实施后,为进一步改进右转专用车道通行能力的研究,以及对双向行人流不同到达情况的影响分析作出补充,提出礼让行人规则下信号交叉口右转专用车道通行能力的计算方法。采用行人群的概念和可接受间隙法,分别分析单向和双向行人流到达情况下,礼让行人规则施行前后冲突区域的变化,建立右转专用车道通行能力的计算公式。选取两个交叉口进行调查,分析行人群到达分布,并得出右转专用车道通行能力的计算结果。结果表明:与已有文献方法相比,本文提出的方法计算出的右转专用车道通行能力更小。总体而言,本文提出的方法能反映礼让行人规则的效果,凸显双向行人流不同到达分布的影响,能为礼让行人规则下的右转车道交通组织改进提供参考。

After the implementation of the rule of yielding to pedestrians,in order to further improve the research on the capacity of exclusive right-turn lanes,and make a supplement to the effect analysis of different arrival conditions about bi-directional pedestrian flows,a method is proposed to calculate the capacity of exclusive right-turn lanes at signal intersections under the rule of yielding to pedestrians.Based on the concept of pedestrian groups and the gap acceptance method,the change of conflict area before and after the implementation of the rule of yielding to pedestrians is analyzed under the arrival of unidirectional and bi-directional pedestrian flows,respectively.The calculation formula of exclusive right-turn lane capacity is established.Two intersections are selected for investigation,the pedestrian group arrival distribution is analyzed,and the calculation results about the capacity of exclusive right-turn lanes are obtained.The results show that:compared with the calculation results by the method in an existing literature,the exclusive right-turn lane capacity calculated by the proposed method is smaller.On the whole,the proposed method can reflect the effect of the rule of yielding to pedestrians,highlight the influence of different arrival distributions of bi-directional pedestrian flows,and provide reference for the traffic organization improvement of exclusive right-turn lanes under the rule of yielding to pedestrians.