單點信號控制交叉口相位相序優(yōu)化模型研究
發(fā)布時間:2019-02-17 19:07
【摘要】:交叉口作為城市交通網絡的關鍵節(jié)點,是實現車輛和行人在不同路段間連續(xù)運行的連接器。隨著城市機動化出行率的不斷提高,人們逐漸認識到對交叉口交通設計的重要性。信號相位方案設計作為信號交叉口交通設計的核心問題,雖然已有部分相關研究,但仍然有所欠缺,本文在已有研究的基礎之上重點針對信號交叉口相位相序優(yōu)化設計展開研究。本文從相位方案在信號控制中的重要性地位出發(fā),論證其優(yōu)化設計的必要性。通過對車輛在信號交叉口到達及離去特性圖的分析,闡述信號方案中相位相序問題的本質內含,分析相位相序優(yōu)化設計的基本原則及其影響因素,并在此基礎之上提出相位方案設計流程;接著對不同相位中交通流的組合問題和聚類問題的相似性進行分析,將車輛在交叉口的到達和離去看作一個排隊等待服務的過程并從中提取對象特征屬性,建立基于聚類思想的相位組合優(yōu)化模型,為相位優(yōu)化及最佳相位數目的確定提供科學理論依據,相比傳統(tǒng)直觀的方法而言是一種精確、快捷實現相位組合優(yōu)化的方法;然后通過分析相序方案中的時空二維特征,確定相序方案設計中的關鍵問題:相位次序優(yōu)化問題和相位切換節(jié)點優(yōu)化問題,分別建立基于損失時間最小的相位次序優(yōu)化模型和基于相位通行強度的相位切換控制策略;最后,為驗證模型及控制策略的有效性,設計了四種不同信號控制方案并在VISSIM軟件中運行仿真。仿真結果表明,經過對原信號交叉口實施相位相序優(yōu)化后,其通行能力基本維持不變,但整體延誤卻降低35%左右且各相位延誤趨于均衡。
[Abstract]:As the key node of urban traffic network, intersection is the connector to realize the continuous operation of vehicles and pedestrians between different sections of road. With the increasing of urban motorized travel rate, people gradually realize the importance of traffic design at intersections. As the core problem of traffic design at signalized intersections, signal phase design has been studied in part, but it is still lacking. Based on the existing research, this paper focuses on the phase sequence optimization design of signalized intersections. Based on the importance of phase scheme in signal control, this paper demonstrates the necessity of its optimal design. Based on the analysis of the arrival and departure characteristic diagram of vehicles at signalized intersection, the essential content of phase sequence problem in signal scheme is expounded, and the basic principle of phase sequence optimization design and its influencing factors are analyzed. On the basis of this, the design flow of phase scheme is put forward. Then the similarity of traffic flow combination problem and clustering problem in different phases is analyzed. The arrival and departure of vehicles at intersection are regarded as a process of queuing and waiting for service and the characteristic attributes of objects are extracted from them. A phase combination optimization model based on clustering is established, which provides a scientific theoretical basis for phase optimization and the determination of the optimal number of phases. Compared with the traditional intuitive method, it is a precise and quick method to realize phase combination optimization. Then by analyzing the two dimensional characteristics of phase sequence scheme, the key problems in the design of phase sequence scheme are determined: phase sequence optimization problem and phase switching node optimization problem. The phase order optimization model based on minimum lost time and the phase switching control strategy based on phase passing intensity are established respectively. Finally, in order to verify the validity of the model and control strategy, four different signal control schemes are designed and simulated in VISSIM software. The simulation results show that after the phase sequence optimization of the original signalized intersection, the traffic capacity remains basically unchanged, but the overall delay is reduced by about 35% and each phase delay tends to equalize.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:U491.54
本文編號:2425500
[Abstract]:As the key node of urban traffic network, intersection is the connector to realize the continuous operation of vehicles and pedestrians between different sections of road. With the increasing of urban motorized travel rate, people gradually realize the importance of traffic design at intersections. As the core problem of traffic design at signalized intersections, signal phase design has been studied in part, but it is still lacking. Based on the existing research, this paper focuses on the phase sequence optimization design of signalized intersections. Based on the importance of phase scheme in signal control, this paper demonstrates the necessity of its optimal design. Based on the analysis of the arrival and departure characteristic diagram of vehicles at signalized intersection, the essential content of phase sequence problem in signal scheme is expounded, and the basic principle of phase sequence optimization design and its influencing factors are analyzed. On the basis of this, the design flow of phase scheme is put forward. Then the similarity of traffic flow combination problem and clustering problem in different phases is analyzed. The arrival and departure of vehicles at intersection are regarded as a process of queuing and waiting for service and the characteristic attributes of objects are extracted from them. A phase combination optimization model based on clustering is established, which provides a scientific theoretical basis for phase optimization and the determination of the optimal number of phases. Compared with the traditional intuitive method, it is a precise and quick method to realize phase combination optimization. Then by analyzing the two dimensional characteristics of phase sequence scheme, the key problems in the design of phase sequence scheme are determined: phase sequence optimization problem and phase switching node optimization problem. The phase order optimization model based on minimum lost time and the phase switching control strategy based on phase passing intensity are established respectively. Finally, in order to verify the validity of the model and control strategy, four different signal control schemes are designed and simulated in VISSIM software. The simulation results show that after the phase sequence optimization of the original signalized intersection, the traffic capacity remains basically unchanged, but the overall delay is reduced by about 35% and each phase delay tends to equalize.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:U491.54
【引證文獻】
相關會議論文 前1條
1 高云峰;陳紅潔;;信號控制交叉口相位相序優(yōu)化研究[A];2007第三屆中國智能交通年會論文集[C];2007年
,本文編號:2425500
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