基于老年人行为特性的行人过街信号优化

Signal Optimization of Pedesenian Crossing the Street Based on the Behavioral Characteristics of the Elderly

为了解决老年人在通过人行横道时因步速慢而在过街绿灯信号总时长内不能安全过街的问题,对行人过街信号进行了优化。选择兰州市的3个信号控制交叉口,用摄影法及人工调查法采集了老年人过街实地数据;分析了绿闪信号、年龄对老年人过街步速的影响程度;建立了年龄和绿闪信号双因素影响下老年人过街时间模型;对现有人行横道信号配时进行了优化。研究表明:绿闪信号对老年人过街步速有显著影响;提出了人行横道两阶段(即安全绿闪时长+最短绿闪时长)绿闪信号模式,确保老年人安全过街。

In order to solve the problem that the elderly cannot cross the street safely within the total time of green light signal due to slow walking speed when passing through the crosswalk,the pedestrian crossing street signal was optimized.Three signalized intersections in Lanzhou were selected,and the field data of the elderly crossing the street were collected by photography and manual investigation.The influence degree of green flashing signal and age on the walking speed of the elderly was analyzed,and the time model of elderly crossing the street under the influence of age and green flashing signal was established.The signal timing of the existing crosswalk was optimized.The results show that the green flashing signal has a significant effect on the walking speed of the elderly.A two-stage green flashing signal mode(i.e.safe green flashing duration+shortest green flashing duration)is proposed to ensure the safety of the elderly crossing the street.