低密度路网条件下国省道改扩建工程交通组织——以某国省道改扩建项目为例

Traffic Organisation of National and Provincial Highway Reconstruction and Expansion Projects under Low Density Road Network Conditions——Taking a National and Provincial Highway Reconstruction and Expansion Project as an Example

国省道公路的改扩建施工在交通组织方案设计、施工各区段的设置、限速方案等方面都存在很大差异,有必要针对其特点,开展相应的低密度国省干道改扩建的交通组织方案研究。本文利用微观交通仿真软件vissim建立施工区微观仿真模型,对某国省道公路上游缓冲区长度、作业区长度、作业区限速3个主要影响交通组织的因素综合分析,通过仿真建模得出组合条件下16种工况的延误时间和平均速度的结果数据。研究结果表明:作业区的长度对施工路段的延误时间和速度最为显著,作业区越长延误时间越长,其次是作业区限速,作业区的限速值为30 km/h时,施工路段的通行能力最大,缓冲区的长度对施工路段的影响较小。

National and provincial highway reconstruction and expansion construction and highway reconstruction and expansion of the traffic situation faced by different,in the traffic organisation scheme design,construction of the various sections of the setup,speed limit scheme,etc.It is necessary to carry out a study on the traffic organisation scheme for the reconstruction and expansion of low-density national and provincial trunk roads according to their characteristics.This paper uses microscopic traffic simulation software vissim to establish a microscopic simulation model of the construction zone,and comprehensively analyses the length of the buffer zone upstream of a national and provincial highway,the length of the operation zone,and the speed limit in the operation zone of the three main factors affecting the traffic organisation,and derives the resultant data of delay time and average speed of the 16 conditions under the combination of the conditions through simulation modelling.The results of the study show that the length of the operation zone has the most significant effect on the delay time and speed of the construction section,and the longer the operation zone the longer the delay time,followed by the speed limit of the operation zone,and the maximum capacity of the construction section is achieved when the speed limit value of the operation zone is 30 km/h,and the length of the buffer zone has a lesser effect on the construction section.