过街行人对寒区冰雪期城市道路无信号人行横道处机动车交通流参数与通行能力的影响

摘要

现行规范在确定城市道路路段通行能力时没有考虑过街行人这一影响因素,而我国城市道路交通系统运行的特征表现为严重的人车混行,在未设置信号控制的人行横道处,车辆与过街行人交通冲突的可能性大,通行能力明显下降.为完善城市道路路段通行能力的研究成果,基于寒区冰雪期城市道路路段无信号控制人行横道的调查数据,分别构建了行人流量与车头时距、行人流量与机动车车速的关系模型.基于此模型计算得到了寒区冰雪期不同行人流量下城市道路路段通行能力的修正系数.%Present specifications for road traffic capacity ignores the factors of crossing pedestrian.However,the urban road traffic system in China is characterized by the coexistence of pedestrians and vehicles.On the road section without crossing signals,the possibility of conflict between vehicle and pedestrian is big,and the capacity declines significantly.In order to improve the research of the capacity of urban road section,this paper develops a model that captures the interrelations among pedestrian volume and headway,pedestrian volume and driving speed based on the survey data at an non-signalized crosswalk of cold region urban road during ice and snow period.Based on the model,this paper presents the capacity correction coefficients of cold region urban road section for different crossing pedestrian volume during ice and snow period.