高速公路施工区车头时距分布规律及其影响因素分析

摘要

施工区作为高速公路的瓶颈路段和事故多发路段，对其车头时距分布规律和影响因素的研究是确定其通行能力和提高高速公路安全水平的基础工作。以陕西省西安－宝鸡高速公路和西安－临潼高速公路施工区为例，分析了半幅封闭半幅双向通行施工区和单向行车道封闭两种施工区的车头时距分布规律，并确定了施工区车流的运行状态；进一步研究了交通量和施工区不同区段两个因素对车头时距分布规律的影响。结果表明施工区车头时距随着交通量的变化和施工区区段的不同呈现一定的规律性变化。%Work Zones as the bottleneck sections and black spots of freeway.Research on its traffic headway distribution regulars and its influence factors are the basic work for determine its capacity and improve the level of highway safety.Taking the work zones of Xi’an to Baoji freeway and as example,the traffic headway regular is analyzed for closed one-way lanes work zone and the closed one-way running lane work zone,then the traffic operation states are described.The influence of traffic volume and different sections on traffic headway of work zone are further studied.The results show that traffic headway appears regular change characters with the different volume and sections of work zone.