【摘要】：城市道路交叉口是城市道路上不同交通流不斷聚集和消散的地方,它是城市道路不可或缺的重要組成部分,在城市道路網(wǎng)中起著至關(guān)重要的作用。設(shè)計(jì)城市交叉口信號配時(shí)控制方案的傳統(tǒng)思想一般為定時(shí)控制。有時(shí)也會根據(jù)全天交叉口交通量存在的顯著不同(例如早、晚高峰和平峰時(shí)段)分時(shí)段控制,但本質(zhì)上仍是定時(shí)控制,未考慮交通流隨機(jī)性特點(diǎn)對交叉口配時(shí)的影響。本文對現(xiàn)有的交叉口信號配時(shí)優(yōu)化及動態(tài)控制方法進(jìn)行綜述分析,總結(jié)各種方法的優(yōu)缺點(diǎn)及適用條件,針對現(xiàn)有的交叉口信號配時(shí)控制策略的弊端,提出基于路段交通量構(gòu)成比例的方向指示信號動態(tài)配時(shí)思想:首先從來源和去向的角度給出了路段交通量構(gòu)成比例的定義,對其中路段交通量去向構(gòu)成進(jìn)行詳細(xì)分析。根據(jù)路段交通流的特性及其轉(zhuǎn)向特點(diǎn),在對常用的交通量構(gòu)成比例短時(shí)預(yù)測方法進(jìn)行詳細(xì)對比分析的基礎(chǔ)上,選擇使用ARIMA模型對路段交通量構(gòu)成比例進(jìn)行預(yù)測。然后根據(jù)預(yù)測得到的各進(jìn)口路段交通量構(gòu)成比例,提出以交叉口車輛延誤為判斷指標(biāo)的交叉口相位方案初始判斷方法;并對韋伯斯特配時(shí)方法進(jìn)行詳細(xì)分析,針對其無法適應(yīng)交通量實(shí)時(shí)變化及可能造成道路資源浪費(fèi)等缺點(diǎn),根據(jù)路段交通量構(gòu)成比例對兩相位配時(shí)公式進(jìn)行修正,得到兩相位方向指示信號動態(tài)配時(shí)方法;接著,在考慮四相位交叉口各相向進(jìn)口路段交通量構(gòu)成比例對稱性的基礎(chǔ)上,分別給出不同情況下交叉口相位方案的調(diào)整策略及動態(tài)配時(shí)公式;并給出了交叉口方向指示信號動態(tài)調(diào)整的策略與原則。最后對成都市實(shí)際交叉口進(jìn)行調(diào)查,運(yùn)用Eviews軟件建立交叉口各進(jìn)口路段交通量構(gòu)成比例的ARIMA模型,對調(diào)查數(shù)據(jù)進(jìn)行擬合并得出其預(yù)測值。根據(jù)預(yù)測值,對相位方案進(jìn)行實(shí)時(shí)調(diào)整、計(jì)算交叉口方向指示信號動態(tài)配時(shí)結(jié)果,并從綠燈時(shí)間利用率、交叉口延誤和通行能力三方面與韋伯斯特配時(shí)方案進(jìn)行對比,用以驗(yàn)證本文提出的基于路段交通量構(gòu)成比例的方向指示信號動態(tài)配時(shí)方法的有效性。
[Abstract]:The intersection of urban roads is a place where different traffic flows gather and dissipate. It is an indispensable part of urban roads and plays a vital role in the urban road network. The traditional idea of designing signal timing control scheme of urban intersection is timing control. Sometimes, there are significant differences in traffic volume (such as early, late peak and peak periods) according to the traffic volume of all-day intersections, but it is still a timing control in essence, and the influence of the randomness of traffic flow on the intersection timing is not taken into account. This paper summarizes and analyzes the existing signal timing optimization and dynamic control methods at intersections, summarizes the advantages and disadvantages and applicable conditions of various methods, and aims at the drawbacks of the existing signal timing control strategies at intersections. The idea of dynamic timing of direction indication signal based on the proportion of traffic volume is put forward. Firstly, the definition of the proportion of traffic volume is given from the point of view of source and direction, and the direction and direction of traffic volume is analyzed in detail. According to the characteristics of road traffic flow and its steering characteristics, on the basis of the detailed comparison and analysis of the commonly used short-term forecasting methods of traffic volume composition ratio, ARIMA model is chosen to predict the traffic volume composition proportion of road sections. Then, according to the proportion of traffic volume of each import section, the initial judgment method of intersection phase scheme based on vehicle delay at intersection is put forward. The method of Webster timing is analyzed in detail. Aiming at the shortcomings of the method, such as its inability to adapt to the real-time change of traffic volume and the possible waste of road resources, the two-phase timing formula is modified according to the proportion of traffic volume in road sections. The dynamic timing method of two phase direction indication signal is obtained. Then, on the basis of considering the proportional symmetry of the traffic volume at the four-phase intersection, the adjustment strategy and the dynamic timing formula of the phase scheme of the intersection under different conditions are given. The strategy and principle of dynamic adjustment of direction indication signal at intersection are given. Finally, the actual intersection in Chengdu is investigated, and the ARIMA model of the proportion of traffic volume in the intersections is established by using Eviews software, and the predicted value is obtained by combining the survey data. According to the predicted value, the phase scheme is adjusted in real time, and the dynamic timing results of direction indication signal at intersection are calculated. The results are compared with Webster timing scheme in three aspects: green time utilization ratio, intersection delay and traffic capacity. It is used to verify the effectiveness of the proposed dynamic timing method for directional indicator signals based on the proportion of road traffic volume.
【學(xué)位授予單位】：西南交通大學(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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本文編號：2300853