本文選題：交通工程　切入點(diǎn)：信號(hào)控制　出處：《昆明理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在交通需求較小的情況下,環(huán)形交叉口可以使車輛連續(xù)順暢的通過,不僅消除了沖突點(diǎn)而且還提高了行車的安全性。但是近些年來,連續(xù)增長的交通流量使單純的無控制環(huán)形交叉口已經(jīng)不再適用。針對(duì)環(huán)形交叉口的左轉(zhuǎn)車流二次停車控制方法由同濟(jì)大學(xué)的楊曉光等提出,該方法不僅能擴(kuò)大環(huán)形交叉口的容量瓶頸,使左轉(zhuǎn)車流能在環(huán)道空間上二次排隊(duì)停車,還能提高環(huán)形交叉口的通行能力,降低行車延誤。但是左轉(zhuǎn)二次控制方法一般采用對(duì)稱放行的兩相位信號(hào)控制,實(shí)際運(yùn)用中環(huán)形交叉口的各個(gè)進(jìn)口方向流量完全相同的概率較小。當(dāng)對(duì)向兩個(gè)進(jìn)口道方向流量存在差異性的情況時(shí),仍使用對(duì)稱放行的控制方案,會(huì)使得同一相位中對(duì)向進(jìn)口方向環(huán)形交叉口內(nèi)部環(huán)道利用不均,進(jìn)口道方向信號(hào)相位中的綠燈時(shí)間利用率不均。所以,需要在環(huán)形交叉口左轉(zhuǎn)二次控制的研究內(nèi)容中,面向大型環(huán)形交叉口在對(duì)向存在流量差異情況下的信號(hào)控制進(jìn)行深一步的研究。論文主要通過介紹現(xiàn)存針對(duì)于大型環(huán)形交叉口左轉(zhuǎn)二次信號(hào)控制中的對(duì)稱放行控制方案,并對(duì)其在現(xiàn)實(shí)對(duì)向存在流量差異性情況下存在著有效綠燈時(shí)間利用率不足和環(huán)道空間利用有效性缺失的問題進(jìn)行了分析和總結(jié)。為了后續(xù)對(duì)比分析的方便,對(duì)常規(guī)的對(duì)稱放行左轉(zhuǎn)二次信號(hào)控制方案的具體適用條件,信號(hào)控制方案參數(shù)的具體標(biāo)定過程進(jìn)行了詳細(xì)敘述。論文的主要?jiǎng)?chuàng)新之處在于,根據(jù)對(duì)稱方向控制方案中對(duì)環(huán)道空間利用不足的情況,提出了一種利用剩余環(huán)道空間,提前放行高流量進(jìn)口方向車流的控制方法。并詳細(xì)分析了該提前放行控制方案的控制策略的具體思路與優(yōu)化步驟。針對(duì)流量差異性在控制方案的實(shí)施過程中,對(duì)相關(guān)進(jìn)口道的各個(gè)相位時(shí)間的總體狀況進(jìn)行分析,對(duì)相應(yīng)進(jìn)口道流量進(jìn)行修正。最后,結(jié)合常規(guī)的對(duì)稱放行左轉(zhuǎn)二次信號(hào)控制方案中的對(duì)應(yīng)參數(shù)標(biāo)定過程對(duì)提前放行控制方案中的環(huán)形交叉口的信號(hào)周期,左轉(zhuǎn)綠燈時(shí)間,第二停車線綠燈時(shí)間;各個(gè)相位中的綠燈時(shí)間,黃燈時(shí)間,全紅時(shí)間等相關(guān)參數(shù)進(jìn)行分析和確定,完成了對(duì)相應(yīng)的信號(hào)控制參數(shù)進(jìn)行了最終模型標(biāo)定和后續(xù)優(yōu)化,進(jìn)而完成了整個(gè)提前放行控制方案的提出和確定過程。最后,通過建立優(yōu)化控制方案的評(píng)價(jià)體系。利用VISSIM仿真技術(shù),針對(duì)曲靖市區(qū)現(xiàn)實(shí)存在的環(huán)形交叉口流量數(shù)據(jù)進(jìn)行調(diào)查與合理預(yù)測(cè)。將提前放行控制方案與對(duì)稱放行控制方案進(jìn)行對(duì)比,表明提前放行控制方案可以縮短信號(hào)周期。在不同流量差異性存在的情況下,按照兩種不同的信號(hào)控制方案分別進(jìn)行仿真分析,經(jīng)過對(duì)稱控制放行控制方法和優(yōu)化控制方法兩種方案對(duì)實(shí)例交叉口的仿真結(jié)果比較分析,表明了優(yōu)化控制方案具有優(yōu)越性和適用性。
[Abstract]:In the case of low traffic demand, circular intersections can make vehicles flow smoothly, not only eliminate conflict points, but also improve the safety of traffic. But in recent years, With the continuous increase of traffic flow, the simple uncontrolled roundabout is no longer applicable. The second stop control method for the left turn flow at the circular intersection was put forward by Yang Xiaoguang and others of Tongji University. This method can not only enlarge the capacity bottleneck of the annular intersection, but also increase the capacity of the annular intersection. But the second control method of left turn is usually controlled by symmetrical two phase signal. In practical use, the probability of flow in each direction of the annular intersection is quite small. When there is a difference in the flow in the direction of two entry channels, the control scheme of symmetrical release is still used. In the same phase, the utilization of the inner loop in the inlet direction intersection is uneven, and the green light time utilization in the phase of the inlet direction signal is uneven. Therefore, it is necessary to study the secondary control of the left turn in the circular intersection. This paper mainly introduces the existing symmetrical release control scheme for the left turn secondary signal control of large circular intersection. This paper also analyzes and summarizes the problems of the lack of effective green light time utilization rate and the lack of efficiency of ring space utilization under the condition of traffic flow difference in reality. The specific conditions of the conventional symmetrical left turn secondary signal control scheme and the specific calibration process of the parameters of the signal control scheme are described in detail. The main innovation of this paper lies in the fact that, According to the underutilization of the loop space in the symmetrical direction control scheme, a new method of utilizing the residual loop space is proposed. The control method of the traffic flow in the direction of high flow inlet in advance is analyzed in detail. The detailed thinking and optimization steps of the control strategy of the control scheme are analyzed in detail. In view of the flow difference in the implementation process of the control scheme, The overall situation of each phase time of the relevant inlet channel is analyzed, and the flow rate of the relevant inlet channel is corrected. Finally, Combined with the corresponding parameter calibration process of the conventional symmetrical left turn secondary signal control scheme, the signal period, the left turn green time and the second stop line green time of the circular intersection in the early release control scheme are studied. The green time, yellow light time, all red time and other related parameters in each phase are analyzed and determined, and the final model calibration and subsequent optimization of the corresponding signal control parameters are completed. Finally, through the establishment of the evaluation system of the optimal control scheme and the use of VISSIM simulation technology, Based on the investigation and reasonable prediction of the actual flow data of circular intersection in Qujing city, this paper compares the advance release control scheme with the symmetrical release control scheme. The results show that the early release control scheme can shorten the signal cycle. Under the condition of different flow difference, the simulation analysis is carried out according to two different signal control schemes. The comparison and analysis of the simulation results between symmetric control release control method and optimal control method show that the optimal control scheme has advantages and applicability.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U491.54

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