信号交叉口过街老年人比例与行人步行速度关系分析

Analyzing on the Relationship between the Pedestrian Speed and the Ratio of the Older Pedestrian at the Signalized Intersection

为了对不同老年人混入比例下的行人步行速度进行较细致的分析,进而确定老年人比例达到一定程度时的行人信号设置依据,以重庆市3个信号交叉口以及一路段的老年人和成年人过街情况为分析对象,通过现场观测和后期人工提取获取了相关参数。使用统计学的方法,对比分析了老年人和成年人、不同信号交叉口设施设置情况下的步速等特征。最后借助微观仿真软件,使用未知拐点的回归模型分析了老年人的比例与行人步行速度的关系,结果表明:老年人比例超过14%时,行人的步行速度出现显著的变化,进而提出老年人比例超过14%时,建议信号交叉口的步行速度设计值为0.97 m/s。研究成果可以为老年人通行需求较多的信号交叉口行人信号配时提供基础。

In order to analyze the pedestrian s speed at different older mix ratio,and provide the basic value for the pedestrian signal time when the older pedestrian at certain ratio,the relative parameters for the older and adult have got through the manual method using the video of the camera at 3 signalized intersections and 1 section of sidewalks.The speed at the signalized intersection,speed,step size and step frequency on the sidewalk of the older pedestrian and adult were compared using the statistic method.The relation between the ratio of the older pedestrian and the pedestrian speed were researched using the unknown break-point regression method based on the micro-simulation platform.It is proved that the ratio of the older is more than 14%,the pedestrian speed has the significant decreasing,so the suggested pedestrian design speed value is 0.97 m/s when the older pedestrian ratio is more than 14%at the signalized intersection.The results can provide basis for analyzing the speed design when there are many older pedestrians.