發(fā)布時間：2018-04-21 20:31

  本文選題：禁左干線 + 協(xié)調(diào)控制��； 參考：《江蘇大學(xué)》2017年碩士論文

【摘要】：隨著我國經(jīng)濟的快速發(fā)展,汽車保有量激增,城市道路的交通負(fù)荷與日俱增,這給人們?nèi)粘３鲂邪踩珟砹穗[患且嚴(yán)重影響人們的日常生活。交叉口是城市交通的集散點,往往是發(fā)生交通擁堵主要環(huán)節(jié),其中左轉(zhuǎn)交通流又是造成交叉口擁堵的重要原因。由于交通基礎(chǔ)設(shè)施的增建率無法與機動車保有量的增長率相匹配,禁左措施引起人們的關(guān)注。目前對禁左措施的研究并沒有考慮禁左后繞行車輛對整個交通系統(tǒng)的影響,本文提出一種單獨針對禁左干線設(shè)計的協(xié)調(diào)優(yōu)化控制方式。該方式是在總結(jié)禁左交叉口特點和最小延誤法的基礎(chǔ)上,以優(yōu)化相位差、周期以及綠信比為最終目的的禁左干線信號協(xié)調(diào)控制方式。分析左轉(zhuǎn)交通流特性和其對交叉口交通組織的影響,在此基礎(chǔ)上論述了交叉口實施禁左措施的優(yōu)缺點以及實施方式和條件。介紹干線信號協(xié)調(diào)控制的基本概念,分析國內(nèi)外現(xiàn)有的信號協(xié)調(diào)控制方式方法以及影響禁左干線協(xié)調(diào)控制效果的影響因素。基于對現(xiàn)狀的研究,發(fā)現(xiàn)目前對禁左措施的研究范圍僅限于單個交叉口,在干線協(xié)調(diào)控制方面大多數(shù)控制方法也局限于給定車速、固定周期和綠燈時長,僅對相位差等條件下對干線進(jìn)行協(xié)調(diào)優(yōu)化。在基于干線疊加思想的基礎(chǔ)上,考慮車速隨機性以及禁左后繞行車輛對干線的影響,以禁左干線直行車輛及繞行車輛的總延誤和總停車次數(shù)為目標(biāo)函數(shù),構(gòu)建一個適用于禁左干線信號控制的協(xié)調(diào)優(yōu)化模型�；谝粋�由三個禁左交叉口和繞行路線組成的簡單禁左干線系統(tǒng),利用MATLAB設(shè)計改進(jìn)遺傳算法程序語言對搭建模型求解,并基于VISSIM仿真平臺對模型優(yōu)化結(jié)果進(jìn)行仿真分析。然后再將仿真數(shù)據(jù)與以往干線信號協(xié)調(diào)控制所得平均延誤和平均停車次數(shù)對比分析,干線中車輛平均延誤下降2.6s/pcu、排隊長度下降了2.7pcu,顯示了本文所提出模型的優(yōu)越性。在此基礎(chǔ)上對常州市金壇區(qū)東門大街部分交叉口組成的干線進(jìn)行實例分析,經(jīng)驗證發(fā)現(xiàn)本文模型優(yōu)化的禁左干線在五個周期內(nèi)的車輛平均延誤和平均停車次數(shù)均有所下降,驗證模型的實用性。
[Abstract]:With the rapid development of our country's economy, the number of cars is increasing rapidly, and the traffic load of urban roads is increasing day by day, which brings hidden trouble to people's daily travel safety and seriously affects people's daily life. Intersection is the distribution point of urban traffic, which is often the main link of traffic congestion, among which the left-turn traffic flow is an important cause of traffic congestion at intersections. Because the construction rate of traffic infrastructure can not match the growth rate of vehicle ownership, the measures of banning left-left traffic have attracted people's attention. At present, the research on the measures to ban left left does not consider the influence of the left rear bypass vehicle on the whole traffic system. In this paper, a coordinated and optimized control method for the design of the forbidden left trunk line is proposed in this paper. On the basis of summing up the characteristics of forbidden left intersection and the method of minimum delay, this method is based on the optimization of phase difference, period and green signal ratio for the final purpose of the coordinated control of the signal of the forbidden left trunk line. The characteristics of left-turn traffic flow and its influence on traffic organization at intersections are analyzed. On the basis of this, the advantages and disadvantages of the measures to ban left traffic at intersections are discussed, as well as the ways and conditions of implementation. This paper introduces the basic concept of coordinated control of trunk line signals, analyzes the existing methods of signal coordination control at home and abroad and the influencing factors affecting the effect of coordinated control of forbidden left trunk lines. Based on the study of the present situation, it is found that the research scope of the measures to ban the left is limited to a single intersection, and most of the control methods for the coordinated control of the trunk line are limited to the given speed, fixed period and green time. The coordinated optimization of the trunk line is carried out only under the condition of phase difference and so on. Based on the idea of trunk line superposition, considering the randomness of speed and the influence of the left rear bypass vehicle on the trunk line, taking the total delay and the total stop number of the forbidden left trunk line direct vehicle and the bypass vehicle as the objective function, A coordinated optimization model for signal control of forbidden left trunk line is constructed. Based on a simple left-forbidden trunk line system composed of three forbidden left intersections and a bypass route, the model is solved by using MATLAB design and improved genetic algorithm programming language, and the model optimization results are simulated and analyzed based on the VISSIM simulation platform. Then the simulation data are compared with the average delay and the average stop times of the previous trunk signal coordination control. The average vehicle delay decreases by 2.6 s / pcus and the queue length decreases by 2.7 pcu. which shows the superiority of the model proposed in this paper. On this basis, an example analysis of the trunk line formed at the intersection of Dongmen Street in Jintan District of Changzhou City is carried out. It is found that the average vehicle delay and the average parking times of the forbidden left trunk line optimized by this model in five cycles have decreased. The practicability of the model is verified.
【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U491.54

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