交通事故下城市快速路通行能力及改善措施研究

发布时间：2018-01-06 03:11

本文关键词：交通事故下城市快速路通行能力及改善措施研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着我国城市经济的快速发展和城镇化进程的加快，城市道路网的供给压力越来越大，交通安全问题日益突出。作为城市道路基础设施的重要组成成分，城市快速路具有运行速度快，服务交通量和通行能力大等特点，承担着城市内部区域之间的过境交通功能。然而，快速路突发交通事故会引起其通行能力下降、延误增加，，影响区域路网的交通运行环境与安全。为了缓解由交通事故引起的交通拥堵、提高交通事故下救援效率和交通组织效率，保障局部区域路网安全、有序的运行，定量分析和研究交通事故下城市快速路通行能力及其改善措施具有重要的意义。因此，本文首先根据我国道路交通事故统计数据，对城市道路交通事故特点进行归纳、总结和概括，并根据交通事故下驾驶员驾驶行为和道路运行环境的改变对城市快速路特性及其交通特性进行分析，同时考虑事故发生的阶段，结合拥挤持续时间组成分析，对城市快速路通行能力演变特性及其交通拥挤形成过程进行研究，为后续的模型构建提供理论支撑。其次，通过对交通事故下城市快速路通行能力影响因素分析，根据正常条件下通行能力的计算公式，提出仿真分析法和修正系数分析法相结合的交通事故下城市快速路通行能力计算模型，并基于元胞自动机构建车流模型和设置换道规则，运用MATLAB编程软件作为仿真平台，通过不断调整参数对各影响因素的修正系数进行仿真分析，进而实现交通事故下城市快速路通行能力的定量计算，为城市交通管理部门采取及时有效的管控策略提供了数据支持。最后，根据交通事故下城市快速路通行能力的计算结果，提出了交通改善措施，包括交通控制、诱导与速度限制，并运用MATLAB编程软件对交通改善措施效果进行分析与对比。
[Abstract]:With the rapid development of urban economy and the acceleration of urbanization, the supply pressure of urban road network is increasing, and the traffic safety problem is becoming more and more prominent, which is an important component of urban road infrastructure. Urban expressway has the characteristics of fast running, large traffic volume and large capacity, and bears the function of transit traffic between the inner areas of the city. However, the sudden traffic accidents of the expressway will lead to the decline of its traffic capacity. In order to alleviate the traffic congestion caused by traffic accidents, improve the efficiency of rescue and traffic organization in traffic accidents, and ensure the safety of local regional road network. It is of great significance to analyze quantitatively and study the capacity of urban expressway under traffic accidents and its improvement measures. Therefore, according to the statistical data of road traffic accidents in China, this paper summarizes, summarizes and generalizes the characteristics of urban road traffic accidents. The characteristics of urban expressway and its traffic characteristics are analyzed according to the driver's driving behavior and the change of road running environment under the traffic accident. At the same time, considering the stage of the accident, the composition of congestion duration is analyzed. The evolvement characteristics of urban expressway capacity and the formation process of traffic congestion are studied in order to provide theoretical support for the subsequent model construction. Secondly, through the analysis of the influence factors of the urban expressway capacity under the traffic accident, according to the normal conditions of capacity calculation formula. This paper presents a model for calculating the capacity of urban expressway under traffic accidents, which combines the simulation analysis method with the modified coefficient analysis method, and builds the traffic flow model and sets the changing rules based on cellular automata. The MATLAB programming software is used as the simulation platform, through constantly adjusting the parameters to carry on the simulation analysis to each influence factor's correction coefficient, and then realizes the quantitative calculation of the urban expressway capacity under the traffic accident. It provides data support for urban traffic management department to adopt timely and effective control strategy. Finally, according to the calculation results of urban expressway capacity under traffic accidents, traffic improvement measures, including traffic control, guidance and speed limit, are put forward. The effect of traffic improvement measures is analyzed and compared with MATLAB programming software.
【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

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