發(fā)布時間：2018-04-10 20:10

  本文選題：環(huán)形交叉口 + 信號控制�。� 參考：《吉林大學(xué)》2014年碩士論文

【摘要】：19世紀(jì)出現(xiàn)的環(huán)形交叉口具有方便管理、沖突點(diǎn)數(shù)量少、交通流行駛連續(xù)且比較安全等優(yōu)點(diǎn)。特別是如果車輛數(shù)目較低，那么車頭時距服從負(fù)指數(shù)分布或者移位負(fù)指數(shù)分布，車流的狀態(tài)是自由流，環(huán)形交叉口這種交通組織方式比較經(jīng)濟(jì)、高效，它的通行能力遠(yuǎn)遠(yuǎn)高于普通的十字交叉口，在城市道路交通發(fā)展史上發(fā)揮了重要的作用；近年來，隨著我國經(jīng)濟(jì)和社會的持續(xù)高速發(fā)展，城市道路交通需求量不斷增加，，沒有信號控制環(huán)形交叉口的缺點(diǎn)逐漸暴露，作為城市交通重要的“節(jié)點(diǎn)”經(jīng)常發(fā)生“鎖死”和入口排隊過長等現(xiàn)象，為了在空間和時間上充分利用環(huán)形交叉口的資源來達(dá)到提高整個路網(wǎng)通行能力的目的，一種比較有效的方法是根據(jù)環(huán)形交叉口的真實(shí)狀況，探求與實(shí)時交通狀況比較匹配的信號控制方法，將信號控制與環(huán)形交叉口的幾何特點(diǎn)有機(jī)的結(jié)合起來，交通量高峰時利用信號燈控制消除了環(huán)形交叉口存在的沖突擁堵問題，同時也保留了平峰時段環(huán)形交叉口對交通環(huán)境的優(yōu)化以及對交通狀況良好的適應(yīng)性等優(yōu)點(diǎn)。 首先，介紹環(huán)形交叉口的研究背景，分析環(huán)形交叉口國內(nèi)外研究現(xiàn)狀，將本文的研究意義和目的確定，從而確立了本文的主要研究內(nèi)容和整體技術(shù)路線。 其次，對幾種比較常見的環(huán)形交叉口通行能力的計算方法進(jìn)行總結(jié)歸納，在交織區(qū)通行能力的基礎(chǔ)上推導(dǎo)出環(huán)形交叉口進(jìn)口道設(shè)計通行能力計算方法，由此得出環(huán)形交叉口的控制條件。 第三，介紹幾種目前比較常用的周期計算方法，由于環(huán)形交叉口的特殊性，已有的信號控制不能較好的適應(yīng)，本文基于環(huán)道容量—需求的關(guān)系，將ALINEA算法引入環(huán)形交叉口進(jìn)行信號燈協(xié)調(diào)控制，并對信號周期的動態(tài)計算方法進(jìn)行了論述。 最后，對新民廣場的交通現(xiàn)狀進(jìn)行分析調(diào)查發(fā)現(xiàn)，高峰時段經(jīng)常出現(xiàn)擁堵的現(xiàn)象，現(xiàn)有的設(shè)計通行能力已經(jīng)不能滿足其需求，因此對新民廣場進(jìn)行重新渠化、配時，并將配時結(jié)果用VISSIM進(jìn)行了交通仿真，結(jié)果表明，如果配時方法合適，不僅能夠極大增加環(huán)形交叉口的通行能力，而且可以一定程度上適應(yīng)未來交通需求增加的態(tài)勢。
[Abstract]:The roundabout in the 19th century has the advantages of convenient management, small number of conflict points, continuous and safe traffic flow, etc.In particular, if the number of vehicles is low, then the head-length distribution or shift negative exponential distribution, the state of the traffic flow is free flow. This traffic organization mode of roundabout is more economical and efficient.Its traffic capacity is far higher than the common intersection, which plays an important role in the history of urban road traffic development. In recent years, with the sustained and rapid development of our economy and society, the demand for urban road traffic has been increasing.The disadvantage of no signal control ring intersection is gradually exposed. As an important "node" of urban traffic, the phenomenon of "locking" and too long queue at the entrance often occurs.In order to make full use of the resources of the circular intersection in space and time to achieve the purpose of improving the capacity of the entire road network, a more effective method is based on the real situation of the ring crossing.The signal control method, which is compared with the real-time traffic condition, combines the signal control with the geometric characteristics of the annular intersection, and eliminates the problem of conflict congestion at the roundabout by using the signal light control at the peak of traffic volume.At the same time, it also retains the advantages of optimization of traffic environment and good adaptability to traffic conditions.Firstly, the research background of annular intersection is introduced, and the research status at home and abroad at home and abroad is analyzed. The significance and purpose of this paper are determined, so as to establish the main research content and the overall technical route of this paper.Secondly, several common methods for calculating the capacity of roundabout are summarized. Based on the capacity of interlaced area, the method of calculating the design capacity of the entrance of annular intersection is deduced.From this, the control conditions of annular crossover are obtained.Thirdly, several kinds of cycle calculation methods are introduced. Because of the particularity of the annular intersection, the existing signal control can not adapt well. This paper is based on the relationship between the capacity and demand of the ring channel.The ALINEA algorithm is introduced into the loop intersection for signal coordination control, and the dynamic calculation method of signal cycle is discussed.Finally, by analyzing the traffic situation of Xinmin Square, it is found that congestion often occurs during rush hours, and the existing design capacity can no longer meet its demand. Therefore, Xinmin Square is re-channeled and timed.The results of traffic simulation with VISSIM show that if the timing method is suitable, it can not only greatly increase the traffic capacity of the annular intersection, but also adapt to the situation of increasing traffic demand in the future.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U491.54

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