高速公路互通立交单车道出入口小客车运行速度模型研究

发布时间：2018-05-13 06:16

本文选题：高速公路 + 立交单车道出入口　；参考：《长安大学》2017年硕士论文

【摘要】：近年来,随着我国高速公路里程不断增加,架设在高速公路上的互通立交数量骤增,与此同时高速公路互通立交处交通安全问题也日益严重,高速公路互通立交出入口在设计阶段及运营期存有大量安全隐患。我国现有《公路项目安全性评价规范》中采用车辆运行速度进行安全性评价取得了较好的效果,但该规范并未对高速公路互通立交出入口车辆运行速度进行相关规定,对此开展高速公路互通立交出入口运行速度研究势在必行。论文以四川某高速公路互通立交主线范围内交通事故进行分析的基础上,得出在高速公路互通立交出入口范围内交通事故数量明显高于高速公路主线基本路段及立交出口事故数量高于立交入口的结论,通过对互通立交出入口交通事故类型进行统计分析,追尾型事故占有率较大,并从安全角度出发,确定本文研究区域为高速公路互通立交出入口,综合考虑了主线及变速车道行驶特征,确定车辆运行速度的影响因素。论文主要是对高速公路互通立交单车道出入口小客车运行速度及加速度进行分析研究。对高速公路互通立交出入口以渐变段起点及合流鼻开始,每隔10m提取一组速度数据,最终对每个记录点运行速度信息进行SPSS统计分析、汇总,并运用行车动力学仿真软件CARSIM进行纵向加速度仿真分析,确定将高速公路互通立交出入口分为渐变段、减速段及三角区段、加速换道段。论文以自由流状态下小客车为研究对象,利用链式雷达获取12座高速公路互通立交出口及12座高速公路互通立交入口处小客车实时行驶数据,分别经过小客车行驶速度描述性统计、特征点运行速度计算、残差独立性检验、共线性诊断分析、回归系数分析及自变量参数间关系检验,建立了高速公路立交单车道出入口小客车运行速度预测模型,通过对4座立交出口及4座立交入口进行相对误差平均值验算,模型精度可满足要求。本文对高速公路互通立交单车道出入口小客车运行速度预测模型的研究,有助于完善现有对立交出入口运行速度的规定,保障高速公路互通立交出入口的行车通畅及驾驶人生命财产。
[Abstract]:In recent years, with the increasing mileage of freeway in our country, the number of interchanges installed on freeway has increased sharply, and at the same time, the traffic safety problem of expressway interchange is becoming more and more serious. There are a lot of hidden dangers in the design and operation period of expressway interchange entrance and exit. The safety evaluation of highway project in our country has achieved good results by using vehicle running speed, but this code has not made relevant regulations on the speed of vehicle running at the freeway interchange entrance and exit. Therefore, it is imperative to study the operating speed of expressway interchange entrance and exit. Based on the analysis of traffic accidents in the main line of a highway interchange in Sichuan, It is concluded that the number of traffic accidents in the expressway interchange entrance range is significantly higher than that in the main highway main line and the interchange exit accident number is higher than that at the interchange entrance. Through the statistical analysis of the traffic accident types at the interchanges and exits, the rear-end traffic accidents occupy a large share, and from the point of view of safety, the study area of this paper is determined as the freeway interchange entrance and exit. The driving characteristics of main line and variable speed lane are considered synthetically to determine the influencing factors of vehicle running speed. In this paper, the speed and acceleration of a single-lane bus at the freeway interchange are analyzed and studied. A group of velocity data is extracted every 10 m from the starting point of the gradual change section and the confluent nose at the entrance of the expressway interchange. Finally, the running speed information of each record point is statistically analyzed and summarized by SPSS. The longitudinal acceleration simulation analysis is carried out by using the simulation software of driving dynamics, CARSIM, and it is determined that the expressway interchange entrance and exit are divided into gradually changing section, decelerating section and trigonometric section, and accelerating the changing section. In this paper, taking the passenger cars in the free flow state as the research object, the real-time driving data of 12 freeway interchange exits and 12 freeway interchange entrances are obtained by using chain radar. After the descriptive statistics of the passenger car speed, the calculation of the running speed of the characteristic point, the independence test of the residual error, the analysis of the collinear diagnosis, the analysis of the regression coefficient and the test of the relationship between the parameters of the independent variables, A prediction model of the running speed of the passenger cars at the single lane entrance of the expressway interchange is established. By checking the relative error average value of the four interchanges and the four interchanges, the accuracy of the model can meet the requirements. In this paper, the research on the prediction model of the running speed of the single lane passenger car at the freeway interchange is helpful to improve the existing regulations on the running speed of the interchange entrance and exit. To ensure the smooth operation of the expressway interchange and the life and property of the driver.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U412.352.1;U491

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