Urban trunk one-way green wave control optimization method considering vehicle speed non-uniformity

Abstract

The invention discloses an urban trunk one-way green wave control optimization method considering vehicle speed non-uniformity. An unequal saturation signal timing idea is adopted to provide a flexible adjustment and optimization space for coordinated phase green time, and optimization of coordinated phase green time and phase difference parameters under the condition of non-uniform vehicle speeds is realized through a quantified vehicle speed fluctuation interval. The uncertainty of traffic flow operation state is integrated in the bandwidth maximization optimization process, the defect that a traditional method cannot consider both optimization of trunk intersection signal cycle and green time, adopts the assumption of average vehicle speed and ignores vehicle speed non-uniformity is overcome, the capability of trunk one-way green wave coordinated control to resist external interference can be effectively enhanced, the operation efficiency of trunk traffic flow is improved, good real-time and practical properties ensure the operability of actual applications, and the method plays a positive role in urban road traffic signal control optimization system construction and urban traffic control level upgrading.

Description

technical field [0001] The invention relates to the technical field of intelligent traffic signal control, in particular to an optimization method for one-way green wave control of urban arterial lines in consideration of vehicle speed inhomogeneity. Background technique [0002] One-way green wave control is one of the most commonly used methods in the coordinated control of urban trunk line signals. Aiming at the traffic operation mode dominated by a certain direction of traffic flow on the urban main line (such as tidal flow during morning and evening peak hours, one-way traffic flow, inbound and outbound traffic flow of the urban main line during holidays, etc.), and the priority evacuation of a certain main line traffic flow, etc. Under certain circumstances, the use of one-way green wave control methods can often effectively improve the efficiency of arterial road traffic operation, reduce the number of vehicle parking, shorten the travel time of vehicles, and ensure t...

AI Technical Summary

Problems solved by technology

[0004] As far as the maximization of the one-way green wave bandwidth is concerned, since there is no constraint on the coordination phase difference, the one-way green wave bandwidth is mainly limited by the public period of the arterial intersection and the minimum coordination green time, and the traditional green wave bandwidth maximization method cannot Based on the actual collected traffic flow data, the optimization of cycle and green time often requires the help of external algorithms or models, which limits the ability to further optimize and expand the green wave bandwidth; in addition, the traditional green wave bandwidth maximization method uses The assumption of the average speed of the road section ignores the unevenness of vehicle speed. Many research conclusions show that urban road traffic flow is affected by external factors such as intersection signal control, road grade, weather environment, road test parking, pedestrians and non-motorized vehicles. The influence and interference of the traffic flow state has significant uncertain characteristics, and the non-uniformity of vehicle speed is one of its specific manifestations

When the traffic flow state shows strong fluctuation characteristics, the assumption of the average vehicle speed in the traditional method will lead to a large accumulation of errors, especially when the traffic condition is close to saturation or oversaturation, such effects are more significant, which cannot effectively guarantee traffic flow. The stability and coherence of the flow operation state may even cause the overall failure of the main line coordination

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