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Urban Expressway On-ramp and Correlated Intersections Method Research on Coordinated Control Theory

Author: ZhangMiao
Tutor: XuShuangYing
School: Chang'an University
Course: Vehicle Operation Engineering
Keywords: Urban Expressway Ramp Control Joined Intersection Traffic flow characteristics Coordinated control
CLC: U491.54
Type: Master's thesis
Year: 2011
Downloads: 97
Quote: 0
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Abstract


With the accelerated process of urbanization in China, the long-distance traffic travel demand grows, comfortable and fast travel requirements to meet the people, urban freeway emerged. However, due to the rapid growth in traffic demand, rapid road construction speed is far less than the growth rate of traffic, and of the lack of urban freeway traffic flow characteristics and control technology system, traffic from the entrance ramp unrestricted import Expressway serious impact on the urban expressway and ground the normal functioning of the road, urban road network, traffic safety and traffic congestion is a growing problem. Ramp control to a certain extent ease the the freeway mainline congestion situation, but congestion problems be transferred to the intersection of Expressway converge ground. Fast road with the ground and thus will converge road intersection area freeway entrance ramp correlated intersection control method harmonization of research has important practical significance. Fast road convergence with the ground traffic flow in the intersection area for the study, convergence queue length and the ground based on the entrance ramp of the freeway intersection ramp queue length associated phase judgment, a freeway entrance ramp and ground convergence intersection coordination control method. Expressway mainline - the entrance ramp - convergence intersection area traffic flow characteristics, summarized the study area, the existing traffic problems, and in-depth analysis of its causes, and provides a theoretical basis for the coordination of the control method proposed . Traffic control technology, introduces the role of the freeway entrance ramp control system and system components combine different ramp control, demand - capacity control, share control and ALINA control of three typical ramp metering algorithms, and control basic theory briefly discusses the intersection timing signals, to lay the foundation for the realization of the coordinated control method. Finally, based on the coordinated ramp correlated intersection control objectives, the proposed design of the coordinated control framework, the composition of the program implementation and coordination control system module, for different traffic status of the study area, the study of each state coordinated control method and algorithm through simulation, to verify the feasibility of coordinated control method.

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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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