信号倒计时显示方式对行人过街生理负荷的影响  

Impact of Countdown Traffic Signal on Pedestrian Crossing Physiological Load

作　　者：彭金栓[1] 杨祥浩 陈鑫 PENG Jin-shuan;YANG Xiang-hao;CHEN Xin(College of Traffic&Transportation,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学,交通运输学院,重庆400074

出　　处：《交通运输系统工程与信息》2023年第2期307-314,325,共9页Journal of Transportation Systems Engineering and Information Technology

基　　金：国家重点研发计划(2018YFB1600501);重庆市高校创新研究群体项目(CXQT21022);重庆市自然科学基金(CSTB2022NSCQ-MSX0549)。

摘　　要：为研究信号倒计时显示方式对行人过街生理负荷的影响,选取两个不同信号倒计时显示方式的人行横道进行试验,实时采集行人生理和速度等特征参数。分析过街起始时段和年龄等因素对行人生理特性的影响,揭示生理特性与过街速度的耦合规律。基于心率、心率变异性及皮肤电等多源指标,构建行人过街生理负荷评价模型。研究表明:随过街起始时段的推移,行人心率增长率(HRI)、R-R间期差值均方根(RMSSD)及皮电均值(MEDA)均逐渐增大,R-R间期均值(AVNN)则逐渐减小;全程显示方式下,行人生理负荷显著高于定程显示(10 s倒计时);行人生理负荷均随过街起始时段的推移而升高,且在各个过街时段内老年人生理负荷显著高于青年和中年群体。研究结论能够为交通管理部门完善和优化慢行交通安全设施提供参考。To investigate the impact of signal countdown display on pedestrian physiological load,this paper conducted the experiments at two crosswalks with different signal countdown displays.The real-time parameters were collected such as physiology and speed to analyze the effect of the crossing initial time-phase and age on the physiological characteristics of pedestrians.The coupling pattern between physiological characteristics and crossing speed was revealed.Considering multi-source indicators such as heart rate,heart rate variability and skin conductance response,the paper proposes a pedestrian physiological load evaluation model.The results show that the heart rate growth rate(HRI),root mean square of R-R interval difference(RMSSD),mean value of skin conductance response(MEDA)gradually increase with the passage of the crossing initial time-phase.Nevertheless,the mean value of R-R interval(AVNN)gradually decreases.The physiological load of pedestrians in the whole process display is significantly higher than that in the part process display(10-second countdown).The physiological load of pedestrians all increases as crossing initial time-phase passes.The physiological load of elderly pedestrians is obviously higher than that of young and middle-aged pedestrians in each crossing initial time-phase.The results of the study provide a reference for traffic management departments to improve and optimize non-motorized traffic safety facilities.

关 键 词：城市交通 生理负荷 因子分析 行人过街 信号倒计时 

分 类 号：U121[交通运输工程]