城市干路行人过街警告标志前置距离研究

结合城市干路中行人过街安全问题,针对行人过街警告标志设置的前置距离问题进行研究。首先对驾驶员驾驶过程中的视认特征进行分析,并将其划分为不同阶段,其次根据不同阶段驾驶行为特征建立各阶段车辆行驶距离模型,并考虑停车安全距离,最终构建行人过街警告标志前置距离解析模型。最后,根据人机工程学原理进行驾驶模拟试验,测定相关数据,并对模型中各参数值大小进行标定。经计算得到不同速度、不同车道数下的行人过街警告标志前置距离,并给出建议距离。结果表明,当速度一致时,随着车道数增加,行人过街警告标志前置距离不断增大;当车道数一致时,随着速度增加,标志前置距离增大。研究结果可为城市干路行人过街警告标志设置提供参考。

Research on the pre-distance of pedestrian crossing warning signs on urban trunk road

Aiming at the safety problem of the pedestrian crossing in urban trunk roads,the pre-distance of pedestrian crossing warning signs is studied.Firstly,the visual characteristics of driver driving process are analyzed and divided into different stages.Secondly,according to the characteristics of driving behavior in different stages,the vehicle driving distance model in each stage is established,and the parking safety distance is considered.Then,the analytical model of pedestrian crossing warning sign pre-distance is constructed.The driving simulation test is carried out by the ergonomics principle,then the relevant data are measured,and the values of each parameter in the model are calibrated.The pre-distance of pedestrian crossing warning signs under different speeds and lanes is calculated,and the recommended distance is given.The result shows that when the speed is the same,with the increase of the number of lanes,the pre-distance of pedestrian crossing warning signs increases;when the number of lanes is the same,with the increase of speed,the pre-distance of pedestrian crossing warning signs increases.The research result can provide some reference for setting pedestrian crossing warning signs on urban trunk roads.