远引左转掉头中央分隔带开口间距的研究

发布时间：2018-01-05 06:26

本文关键词：远引左转掉头中央分隔带开口间距的研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：远引左转掉头交通组织方式使直接左转的车辆先直行再利用交叉口下游较宽的中央分隔带掉头回转，，间接地把左转变为右转，有效地分担了加载在通行能力相对较大路段交叉口的一部分交通负荷，提高了车辆运行的高效性和安全性，是目前城市道路疏解交通阻塞的重要方法之一。由于远引左转掉头会增加主路左转车辆的绕行距离，所以合理的中央分隔带开口间距成为重要的研究内容。本文首先对左转车辆的冲突点进行了具体分析，提出了远引平面交叉口的概念。根据远引左转交通组织原则与城市主干路出入口管理的基本原则，引出了远引左转掉头交通组织的适用条件。通过对交通流相关概念的研究，并根据车辆直接左转与远引左转运行过程的对比分析、左转交通流及远引左转掉头下的交通流特性的分析，以及对四种中央分隔带开口位置的比较分析，得出掉头最佳位置为选取在道路交叉口下游中央分隔带开口的结论，明确了远引左转掉头交通组织行为实施的优越性与可行性。通过研究中央分隔带开口间距影响因素及国外中央分隔带开口间距的标准，提出了适应我国城市主干路中央分隔带开口的布设方式包括车辆转弯半径及中央分隔带开口形式、大小、宽度等的确定方法。重点通过交织段运行的相关分析，确定了中央分隔带开口间距的大小。结合计算简例并运用VISSIM进行仿真验证，进一步确认了借用交织段交织距离的计算确定远引左转掉头中央分隔带开口间距的正确性与科学性，为远引左转掉头在城市道路中的应用提供一定的参考依据。
[Abstract]:Far left turn turn the traffic organization causes the direct left turn vehicle to go straight first and then turn around using the wider central separation belt downstream of the intersection and indirectly turn left into right turn. It can effectively share part of the traffic load at the intersection with relatively large traffic capacity, and improve the efficiency and safety of the vehicle operation. It is one of the most important methods to relieve traffic congestion on urban roads at present. Since turning around from far to left will increase the detour distance of left-turn vehicles on the main road, it is important to study the reasonable distance between the openings of the central separation belt. In this paper, the conflict point of the left-turn vehicle is analyzed, and the concept of the remote intersection is put forward. According to the principle of the traffic organization and the basic principles of the entrance and exit management of the urban trunk road. The suitable conditions for the traffic organization of the far left turn turn are introduced. Through the study of traffic flow related concepts, and according to the vehicle direct left turn and remote left turn operation process comparative analysis, left turn traffic flow and far left turn turn under the traffic flow characteristics analysis. By comparing and analyzing the opening position of four kinds of central separator, it is concluded that the best position of turning around is to select the opening of the central separation belt downstream of the road intersection. The superiority and feasibility of traffic organization behavior of long turn left turn are defined. By studying the influence factors of the opening spacing of the central separator and the standards of the opening spacing of the central separator in foreign countries. This paper puts forward a method for determining the opening of the central separation belt of the urban trunk road in China, including the turning radius of the vehicle and the opening form, size and width of the central separation belt, etc. The key points are the related analysis of the operation of the interleaving section. The distance between the openings of the central separator is determined. Combined with a simple calculation example and the use of VISSIM simulation verification, further confirmed the use of Interleaved Interleaved Interleaved distance calculation to determine the distance between the distance between the center of the far left turn and turn around the center of the separation between the correctness and scientific. It provides a certain reference for the application of long-distance left turn turn in urban road.
【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】：U491.233

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