本文選題：交通工程　切入點：環(huán)形交叉口　出處：《昆明理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：隨著我國城市人口的不斷增加,城市內機動車保有量也在持續(xù)增加,導致了城市交通擁堵問題的加劇,而環(huán)形交叉口交通擁堵所帶來的車輛延誤增加、交通秩序混亂、交通事故頻發(fā)已經逐漸變?yōu)槌B(tài)化問題。因而,如何采取有效措施來緩解環(huán)形交叉口交通擁堵現(xiàn)象已經成為當今交通控制研究的熱點問題。論文首先對交叉口群的概念及特征進行了界定與介紹,解析了交叉口群信號協(xié)調控制的基本參數(shù)(公共周期、綠信比、有效綠燈時間、相位差、排隊率以及關聯(lián)度)以及交叉口群信號協(xié)調控制的性能指標(車輛平均停車次數(shù)、車輛平均延誤以及平均排隊長度),并剖析了環(huán)形交叉口參與下的交叉口群存在的問題。其次,解析了交叉口群劃分內涵及常見劃分類型,分別基于干道優(yōu)先、短連線優(yōu)先、環(huán)形交叉口優(yōu)先原則提出了干道協(xié)調控制的交叉口群劃分方法,對控制區(qū)域進行初步劃分;在此基礎上進行瓶頸區(qū)識別,相鄰交叉口關聯(lián)度對計算,并提出了基于相鄰交叉口關聯(lián)度的交叉口群劃分方法,對交叉口群區(qū)域進行進一步劃分。然后,從虛擬信號控制理念出發(fā),提出了基于虛擬信號控制的交叉口群協(xié)調控制策略;通過選取關聯(lián)指標、計算路徑關聯(lián)度,確定了虛擬信號控制下的交叉口群協(xié)調控制路徑;基于干道綠波協(xié)調控制原理,通過確定公共周期與綠信比、計算行程及延誤時間、優(yōu)化綠信比和主相位綠燈時間,建立了環(huán)形交叉口參與下的交叉口群相位差模型。最后,應用VISSIM微觀交通仿真軟件,以云南省曲靖市珠江源大道與建寧東、西路所組成的道路網(wǎng)為例,以平均停車次數(shù)、平均延誤時間及平均排隊長度作為評價指標,分別以交叉口群劃分方式以及虛擬信號控制環(huán)形交叉口作為變量,模擬不同環(huán)境下的交叉口群運行狀態(tài)并與實際情況進行對比,結果表明:利用相鄰交叉口關聯(lián)度對交叉口群劃分效果優(yōu)于干道協(xié)調控制的交叉口群劃分,且兩種劃分方式下的車輛平均延誤時間以及車輛平均停車次數(shù)分別較現(xiàn)狀條件降低了12.8%、21.4%以及12.1%、19.6%;虛擬信號控制狀態(tài)下交叉口群運行效益優(yōu)于現(xiàn)狀控制,所有車輛平均延誤時間從29.19秒降低至22.93秒,降低了 21.4%,此外,平均排隊長度從30.64米降低至25.94米,降低了 15.3%。
[Abstract]:With the continuous increase of urban population in China, the number of motor vehicles in cities is also increasing, which leads to the aggravation of urban traffic congestion, and the increase of vehicle delay and traffic order caused by traffic congestion at roundabout intersection. The frequency of traffic accidents has gradually become a regular problem. How to take effective measures to alleviate traffic congestion at roundabout has become a hot issue in traffic control nowadays. Firstly, the concept and characteristics of intersection group are defined and introduced in this paper. The basic parameters (common period, green signal ratio, effective green light time, phase difference, queue rate and correlation degree) of the signal coordination control of intersection group and the performance index of the signal coordination control of intersection group (vehicle average stop times) are analyzed. The average vehicle delay and the average queue length are analyzed, and the existing problems of intersection group with the participation of circular intersection are analyzed. Secondly, the connotation and common partition types of intersection group are analyzed, which are based on the priority of trunk road and the priority of short connection, respectively. In this paper, the priority principle of circular intersection is put forward, and the method of division of intersection group is put forward, and the control area is preliminarily divided, on the basis of which the bottleneck area is identified, and the correlation degree of adjacent intersection is calculated. The method of intersection group division based on the correlation degree of adjacent intersection is put forward, and the area of intersection group is further divided. Then, based on the concept of virtual signal control, the coordinated control strategy of intersection group based on virtual signal control is proposed. By selecting the correlation index and calculating the path correlation degree, the coordinated control path of intersection group under virtual signal control is determined. Based on the principle of coordinated control of green wave in trunk road, the travel schedule and delay time are calculated by determining the ratio of public cycle to green signal. The phase difference model of intersection group with the participation of circular intersection is established by optimizing the green signal ratio and the main phase green time. Finally, using the VISSIM microcosmic traffic simulation software, the Zhujiang River Source Avenue and Jianning East of Qujing City, Yunnan Province are used. Taking the average parking times, average delay time and the average queue length as the evaluation indexes, the road network composed of the west road as an example, the way of dividing the intersection groups and the virtual signal-controlled circular intersection are taken as the variables, respectively. The operation state of intersection group in different environments is simulated and compared with the actual situation. The results show that the effect of using adjacent intersection correlation degree to divide intersection group is better than that of intersection group division with coordinated control of trunk road. In addition, the average delay time and the average parking times of the vehicles were decreased by 12.8% and 19.6%, respectively, compared with the current conditions, and the operation benefits of the intersections under the virtual signal control state were better than that of the current situation control, and the average vehicle delay time and the average parking times of the vehicles were decreased by 12.8% and 19.6%, respectively. The average delay time for all vehicles was reduced by 21.4m from 29.19 seconds to 22.93 seconds, and the average queue length was reduced by 15.3m from 30.64 meters to 25.94 meters.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U491.23

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