高速公路出口匝道影响区分级限速方案适用性的研究

发布时间：2018-01-14 03:27

本文关键词：高速公路出口匝道影响区分级限速方案适用性的研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：出口匝道影响区作为高速公路出口匝道与主线的结合部分,由于车辆减速、变换车道等复杂驾驶操作行为显著增加,随之车辆间速度离散程度增大,交通冲突数增多,所以出口匝道影响区是高速公路交通事故多发地点。因此,为防止车辆运行速度的突变,减小连续路段的速度差值,使车辆运行速度能够逐渐减小到匝道限速值,提高出口匝道影响区的交通安全和交通效率,本论文针对高速公路出口匝道影响区分级限速方案的适用性进行了系统的研究。本文首先分析了出口匝道影响区的交通特性,根据出口匝道影响区的交通特性对出口匝道影响区进行了划分以及划分范围的界定；然后通过研究分级限速方案的限速值及其种类、分级限速标志的位置和布设,确定了出口匝道影响区分级限速方案控制方法。按照建立评估指标体系的原则和评估指标筛选方法,选取了速度偏差的变化系数、交通冲突率、车均延误时间和平均排队长度这四个指标作为分级限速方案适用性的评估指标,建立了高速公路出口匝道影响区分级限速方案适用性的评估指标体系,并选取加权加法平均法对分级限速方案适用性进行综合评估。首先初步选取了运行车速影响因素,应用VISSIM交通仿真软件对初步选取的运行车速影响因素进行了验证,组建了合理的交通组织仿真环境,继而确定了分级限速仿真方案,然后建立了分级限速仿真模型,标定了仿真软件和仿真模型的参数,确定了适用性评估指标的参数获取方法,制定了仿真步骤和过程。对分级限速方案在不同交通组织环境仿真方案下的适用性评估指标仿真值进行了相应的处理,然后对比和分析分级限速方案在不同交通组织环境仿真方案中的适用性综合评估结果,进而得出不同分级限速方案在高速公路出口匝道影响区不同交通组织环境下的适用性的情况。
[Abstract]:As the combination part of freeway exit ramp and main line, the impact area of exit ramp increases significantly due to vehicle deceleration, changing lanes and other complex driving operations, and the speed dispersion between vehicles increases. The number of traffic conflicts increased, so the impact area of exit ramp is the location where the highway traffic accidents occur. Therefore, in order to prevent the sudden change of vehicle speed, the speed difference of continuous section is reduced. So that the vehicle speed can be gradually reduced to the ramp speed limit value, improve the exit ramp impact area of traffic safety and traffic efficiency. In this paper, the applicability of the speed limit scheme for the impact of exit ramp on freeway is studied systematically. This paper first analyzes the traffic characteristics of the impact area of the exit ramp, according to the traffic characteristics of the impact area of the exit ramp, divides the impact area of the exit ramp and defines the scope of the division. Then, by studying the speed limit value and its type of graded speed limit scheme, the location and placement of graded speed limit sign, the control method of exit ramp impact differential speed limit scheme is determined. According to the principle of establishing evaluation index system and the selection method of evaluation index, the variation coefficient of velocity deviation and traffic conflict rate are selected. The average vehicle delay time and the average queue length are used as the evaluation indexes of the applicability of the graded speed limit scheme, and the evaluation index system of the expressway exit ramp impact on the applicability of the differentiated speed limit scheme is established. The weighted addition average method is selected to evaluate the applicability of the graded speed limit scheme. Firstly, the influence factors of running speed are selected preliminarily, and the VISSIM traffic simulation software is used to verify the influence factors, and a reasonable traffic organization simulation environment is set up. Then the simulation scheme of hierarchical speed limit is determined, and then the simulation model of hierarchical speed limit is established, the parameters of simulation software and simulation model are calibrated, and the parameter acquisition method of applicability evaluation index is determined. The simulation steps and procedures are worked out. The applicability of the hierarchical speed limit scheme in different traffic organization environment simulation schemes is treated. Then compare and analyze the results of comprehensive evaluation of the applicability of the hierarchical speed limit scheme in different traffic organization environment simulation schemes. Then the applicability of different grade speed limit schemes in different traffic organization environment of expressway exit ramp impact area is obtained.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.4

【共引文献】