基于车流波动理论城市快速路匝道间距比例模型研究

发布时间：2018-03-06 19:31

本文选题：交通规划　切入点：匝道间距比例　出处：《科学技术与工程》2016年36期 　论文类型：期刊论文

【摘要】：城市快速路匝道间距设计是路线设计的重要内容,匝道间距大小和匝道数量对快速路交通流有决定性的影响。当城市快速路处于不间断大交通流量时,车流呈现出较为明显的波动现象。根据城市快速路交通流的这一特点,应用车流波理论,分析了上下匝道间合流区和分流区的车流波特点,进一步建立了出口-入口组合型匝道间距比例数学模型。认为快速路匝道设计不但要考虑间距大小,相邻匝道作为一个整体,还应研究相互之间的影响。实例表明,当匝道间距比例不能满足数学模型时,快速路容易发生交通拥堵,服务水平较低,抗干扰能力较差。
[Abstract]:The design of urban expressway ramp spacing is an important part of route design. The size of ramp spacing and the number of ramps have a decisive effect on the traffic flow of expressway. According to the characteristics of the traffic flow on the urban expressway, the characteristics of the traffic flow in the confluence zone and the shunt area between the upper and lower ramps are analyzed by using the theory of the traffic flow wave. Furthermore, a mathematical model of the proportion of ramp spacing between exits and entrances is established. It is considered that the design of freeway ramps should not only consider the size of the spacing, but also study the influence of each other on the adjacent ramps as a whole. When the ratio of ramp spacing can not satisfy the mathematical model, the expressway is prone to traffic congestion, low service level and poor anti-jamming ability.
【作者单位】：浙江警察学院交通管理工程系;
【分类号】：U491

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