视线受阻条件下车辆对行人过街安全的影响

Safety Effect of Restricted Sight on Driver Behavior with Crossing Pedestrians at Signalized Intersection

车辆经过交叉口,当车辆视线受阻时,对过街行人安全造成一定影响。利用随机威布尔分布函数,对车辆的可接受间隙概率参数进行估算。利用实际数据分析在有无视线遮挡情况下右转车辆的可接受间隙行为变化,并对连续右转车辆的车头时距进行简单描述。分析结果显示,在视线受阻情况下,右转车辆更倾向于选择较小间隙,连续右转车辆的车头时距也较大。该情况会增加人—车冲突,增加交通延迟、降低右转车辆的通行能力。

When the vehicles through the signalized intersection,especially on the restricted sight,it will have an effect on pedestrians who across the street.Cumulative Weibull distribution function was used to estimate parameters of lag/gap acceptance probabilities.By using data,analyze the changes of right-turn vehicles of lag/gap acceptance behavior considering with and without sight obstruction,and describe the headway of continuous right turn vehicles.The result showed that right-turn drivers tend to accept a smaller lag/gap and reject a lager lag/gap with restricted sight.And it was found that the headway of following right-turn vehicles was larger with sight obstruction,which may result to an extra delay and reduced capacity in right-turn lanes.This paper provides an understanding of the relationship between visibility and pedestrian-vehicle conflicts.