【摘要】：隨著高速公路運(yùn)輸量穩(wěn)定增長,交通擁擠不斷發(fā)生。為了解決主線擁擠和入口匝道排隊(duì)溢出問題,提出了基于匝道排隊(duì)長度約束的改進(jìn)啟發(fā)式控制方法,以實(shí)時(shí)確定協(xié)調(diào)匝道個(gè)數(shù),準(zhǔn)確預(yù)測(cè)動(dòng)態(tài)臨界占有率,為高速公路匝道調(diào)節(jié)提供有效方法。根據(jù)主線的交通狀態(tài)和匝道的排隊(duì)長度設(shè)計(jì)協(xié)調(diào)匝道確定規(guī)則,從而實(shí)時(shí)確定協(xié)調(diào)匝道組的匝道個(gè)數(shù),以擴(kuò)大協(xié)調(diào)匝道組的空間容量,緩解主線交通擁擠壓力。利用實(shí)時(shí)檢測(cè)的入口匝道下游合流區(qū)的交通通過量和占有率數(shù)據(jù)設(shè)計(jì)動(dòng)態(tài)臨界占有率預(yù)測(cè)算法,將動(dòng)態(tài)臨界占有率嵌入控制方法中,以適應(yīng)交通狀態(tài)發(fā)生變化時(shí)主線臨界占有率的變化,實(shí)現(xiàn)主線交通通過量最大化。應(yīng)用VISSIM微觀仿真軟件,以沿江高速公路為仿真背景,從路網(wǎng)性能、入口匝道下游合流區(qū)交通狀態(tài)和入口匝道公平性三方面對(duì)控制效果進(jìn)行評(píng)價(jià)。相比其它匝道排隊(duì)長度約束控制方法,本文提出的改進(jìn)控制方法,使路網(wǎng)總行程時(shí)間(TTS)減少約3.4%;使入口匝道下游合流區(qū)的占有率維持在動(dòng)態(tài)臨界占有率附近,使合流區(qū)的交通通過量在交通狀態(tài)發(fā)生突變時(shí)增加1680veh/h;使各個(gè)匝道之間的平均延誤時(shí)間和排隊(duì)長度相均衡,保證了匝道公平性。本文提出的改進(jìn)啟發(fā)式控制方法,在保證主線通過量?jī)?yōu)化的前提下,還能防止入口匝道排隊(duì)溢出,比較適合擁擠條件下的入口匝道協(xié)調(diào)控制。
[Abstract]:With the steady growth of highway traffic, traffic congestion occurs constantly. In order to solve the problem of main line congestion and queue overflow of on-ramp, an improved heuristic control method based on queue length constraint of ramp is proposed to determine the number of coordinated ramps in real time and accurately predict the dynamic critical occupancy rate. It provides an effective method for highway ramp adjustment. According to the traffic state of the main line and the queue length of the ramp, the coordinated ramp determination rules are designed to determine the number of the ramp of the coordinated ramp group in real time, in order to expand the space capacity of the coordinated ramp group and relieve the traffic congestion pressure of the main line. The dynamic critical occupancy prediction algorithm is designed by using the traffic throughput and occupancy rate data of the downstream confluence area of the on-ramp, and the dynamic critical occupancy rate is embedded in the control method. In order to adapt to the change of the critical occupancy of the main line when the traffic state changes, the traffic volume of the main line can be maximized. Based on the simulation of the highway along the Yangtze River, the control effect is evaluated from three aspects: the road network performance, the traffic condition in the downstream confluence area of the on-ramp and the fairness of the on-ramp by using the VISSIM microcosmic simulation software. Compared with other ramp queue length constraint control methods, this paper proposes an improved control method to reduce the total travel time (TTS) of the road network by about 3.4 points. The occupation rate of the downstream confluence zone of the on-ramp is kept near the dynamic critical occupation rate, and the traffic throughput in the confluence zone increases by 1680veh-1 / h when the traffic state changes. The average delay time and queue length of each ramp are balanced to ensure the fairness of the ramp. The improved heuristic control method proposed in this paper not only ensures the optimization of the main line throughput, but also prevents the queue overflow of the on-ramp, which is more suitable for the coordinated control of the on-ramp under crowded conditions.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U491

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本文編號(hào)：2310980