老年人过街比例与信号交叉口行人过街速度设置研究

为分析不同老年人比例在不同行人流量下与行人步行速度之间的关系，借助行人流量对行人服务水平分级，通过人工提取重庆市3个信号交叉口的老年人和中青年人过街的自由速度及加速度标定仿真参数，借助微观仿真平台获取不同行人服务水平下不同老年人比例与行人步行速度数据，利用主成分分析法与回归模型确定老年人过街比例与设计速度之间的关系。结果表明：在信号交叉口行人过街中老年人比例介于21%~41%，建议行人过街设计速度为0.94 m ⋅s-1；老年人比例超过41%后，行人过街设计速度应设定为0.86 m ⋅s-1，以满足老年人的过街需求。

Signalized Intersection Pedestrian Crossing Design Speed and Elderly Pedestrian Proportion Relationship Study

This study investigates the relationship between pedestrian crossing speed and the elderly pedestrian proportion under different pedestrian flow conditions. The micro simulation model was used to obtain the crossing speed and elderly pedestrian proportion data considering different pedestrian level of services (PLOS). The pedestrian free-flow speed and accelerations for the old people, the young and middle-aged people were collected at three signalized intersections in Chongqing, China to calibrate the micro-simulation model. The relationship between the elderly pedestrian proportion and the pedestrian crossing design speed was established by the principal component analysis and the regression model. The results indicate that the design speed of pedestrian crossing is 0.94 m ⋅ s-1 when the elderly pedestrian accounts for 21% to 41% of the pedestrian flow. The design speed of pedestrian crossing is recommended to be 0.86 m ⋅ s-1 when there are more than 41% of pedestrians are elderly people, which meets the needs of the elderly crossing at signalized intersections.