低密度区高速公路平直段交通流速度和流量关系研究

发布时间：2018-02-03 09:04

本文关键词： 交通工程速度和流量关系回归分析低密度区高速公路平直段　出处：《公路交通科技》2014年11期 　论文类型：期刊论文

【摘要】：为确定高速公路基本路段低密度区速度和流量模型形式和模型参数是否与高速公路类型有关,研究了平原区开阳高速、山岭重丘区京珠北高速和山岭微丘区粤赣高速三条代表性的不同类型高速公路的平直段上的交通流。用摄像机在合适调查断面录制了足量视频作原始资料;权衡多方面因素后采用了20 s作为提取数据的统计间隔;利用方差分析判断出了同一高速公路不同车道上车辆速度均值有显著差异,速度和流量模型应分车道建立;将20 s流量折算成标准小汽车流量后放大为小时流率,速度采用20 s内通过断面的所有小型车平均速度,作速度和流率散点图;根据散点图建立了速度和流量模型。结果表明:低密度区不同高速公路平直段速度和流量关系虽均可用线性模型表征,但模型参数不同,而且同一高速公路不同车道的速度和流量模型参数也不同。
[Abstract]:In order to determine whether the model form and model parameters are related to the type of freeway in the low density area of the basic section of expressway, Kaiyang high speed in plain area is studied. Traffic flow on the flat section of three representative different types of expressways in Jingzhu North Expressway and Mountain Micro Hilly area in Mountain heavy Hilly area and Guangdong / Jiangxi Expressway in Shanling heavy Hilly area. Sufficient video frequency was recorded as raw data by video camera in suitable investigation section. After weighing many factors, 20 s was used as the statistical interval to extract the data, and the analysis of variance was used to determine that there were significant differences in the mean speed of vehicles in different lanes of the same highway, and the speed and flow models should be established in different lanes. After the 20 s flow is converted into standard car flow, the flow rate is enlarged to an hourly flow rate, and the velocity of all small cars passing through the cross section within 20 seconds is used to make the velocity and flow rate scatter plot. The velocity and flow models are established according to scattered plot. The results show that although the relationship between velocity and flow in different highway flat sections in low density area can be represented by linear model, the model parameters are different. And the speed and flow model parameters of different lanes of the same highway are also different.
【作者单位】：哈尔滨工业大学交通科学与工程学院;
【基金】：广东交通运输厅项目
【分类号】：U491.112
【正文快照】： expressway;straight section0引言基本路段交通流速度和交通量之间的关系模型是道路通行能力和服务水平划分研究的基础,能为确定单车道的基本通行能力、服务水平等级提供理论支持。而单车道通行能力和服务水平分级标准是车道数决策的关键依据,对高速公路和快速路这样建设成本

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