City expressway multi-ramp coordination control method based on chaos

Abstract

The present invention relates to a city expressway multi-ramp coordination control method based on chaos. The city expressway multi-ramp coordination control method based on chaos takes a city expressway system consisting of a multi-entry ramp, a multi-exit ramp, multiple interchange overpasses and an expressway mean line as a research subject. The method comprises the following steps: 1) performing parameter initialization; 2) performing real-time traffic flow data preprocessing: obtaining the real-time traffic flow data according to an information collection module, wherein the traffic flow data is taken as the input of a traffic flow chaos intelligent identification module; 3) performing the identification of each subsystem chaos state: allowing the traffic flow chaos intelligent identification module to determine whether a weaving area is located at a chaos state or not; 4) performing the single-ramp control grade control based on the chaos; 5) performing the multi-ramp coordination control grade control based on the chaos; and 6) determining the regulation of each entry ramp participating in the coordination in an alternate ramp set R2. The method practicable, low in cost and good in control effect and is applicable to the large-scale popularization and application.

Description

technical field [0001] The invention belongs to the technical field of traffic management and control in traffic and transportation engineering, and in particular relates to a chaos-based multi-ramp coordinated control method for urban expressways. Background technique [0002] Coordinated control is the basic method for road management and control of continuous traffic flow, especially the urban expressway during peak hours and other periods of high traffic demand. Its relatively closed nature makes possible congestion spread very quickly; vehicles on the affected road section in the upstream can be selected The path is limited, and the scope of influence will be wider. At present, traffic congestion has become a common phenomenon in many large and mega-cities. Real-time detection of traffic congestion, determination of control signal application strategies, and calculation of specific control variable values ​​have become necessary steps. This is because the transportatio...

AI Technical Summary

Problems solved by technology

This research is only suitable for small-scale local roads and cannot be applied to large-scale road networks, which is not in line with the actual road traffic conditions.

Moreover, the research scope is limited to the expressway section composed of a single entrance ramp and the main line, and does not involve the coordinated control of multi-ramp main lines under chaos control.

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