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Study on Controlling Strategy of Off-ramp in Expressway

Author: MaJiPing
Tutor: ChenHong
School: Chang'an University
Course: Transportation Planning and Management
Keywords: Urban Freeway On-ramp Metering
CLC: U491.54
Type: Master's thesis
Year: 2013
Downloads: 13
Quote: 0
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Abstract


Urban expressway is the main backbone of the urban road network and the aorta, and its"fast" large-capacity transport function to meet the sustainable development of the city, but inrecent years the fast road congestion problems have become increasingly prominent, seriouslyaffect the efficiency of urban transport play. The Highway Congestion many exit ramp queueof vehicles to be traced back to the main road lead to the main road for some time paralysis iscaused by crowded one of the main reasons.In this thesis, urban freeway exit ramp for the study, in-depth study of the exit rampintegrated control strategies and methods. The full text is divided into five chapters. The firstchapter is the introduction, which introduces the research background, Research, researchpurpose and significance of research ideas. The second chapter is the the ramp control thebasic theory, the article describes the the expressway system features, hinder the smooth flowof the exit ramp, ramp by dividing the export position of the interface on the road section todetermine the exit ramp control method. There is a super-long line up the exit ramp and theintersection associated with the current non-executive phase, the proposed conditions toensure minimal loss of other flows to advance to activate the control strategy of the associatedphase green; intersection associated with the currently executing phase, to extend theminimum conditions to ensure that the flow of losses associated the phase green light controlstrategy. In reasonable control, still can not solve the congestion at the ramp, usingVMS-induced vehicles to choose another path.Then introduces the basic concepts of signaltiming, CTM basic model and VISSIM traffic simulation software. The third chapterdescribes the basic strategy of the exit ramp control, and integration of the exit rampcorrelated intersection priority control method. Chapter integrated control strategy for the exitramp correlated intersection with VISSIM traffic simulation software, the effectiveness andapplicability of verification. The Chapter made paper summarizes the work and subsequentresearch papers.

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CLC: > Transportation > Road transport > Technical management of traffic engineering and road transport > Traffic engineering and traffic management > Line of traffic safety facilities > Traffic Control
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