Dual-target-optimization-based dynamic timing method for urban traffic signal lamp

A technology for urban traffic and signal lights, applied in the field of dynamic timing of traffic lights, can solve problems such as uncertainty, time-varying nonlinearity, and inability to adjust and control signal lights

Active Publication Date: 2016-07-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

The transportation system is a typical complex system, which is composed of urban transportation facilities and participants, and has the characteristics of complexity, uncertainty, time-varying and non-linearity. It is difficult to describe with mathematical models, so that the existing urban transportation The control system cannot adjust and control the signal lights effectively in real time

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  • Dual-target-optimization-based dynamic timing method for urban traffic signal lamp
  • Dual-target-optimization-based dynamic timing method for urban traffic signal lamp
  • Dual-target-optimization-based dynamic timing method for urban traffic signal lamp

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Embodiment Construction

[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0057]The traffic light signal timing scheme at single-point intersections is mainly to adjust the signal period and green signal ratio of the intersection signal lights to achieve the purpose of safely and orderly diverting traffic flow and reducing the delay time and parking times of vehicles at the intersection. However, it should be noted that although the increase of the green signal ratio of a certain signal phase improves the traffic capacity of this phase, it will reduce the traffic capacity of other signal phases at the intersection, and the impact on the traffic capacity of the entire intersection is limited. , so only by reasonably balancing the green signal ratio of each phase can the traffic capacity of the entire intersection be improved. Similarly, too short a signal period can easily lead to frequent alternation of roa...

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Abstract

The invention discloses a dual-target-optimization-based dynamic timing method for an urban traffic signal lamp. The method comprises: a green time ratio, maximum green light time, minimum green light time, and a signal cycle T of an intersection are designated primarily and a conversion step length B is designated; during the given signal cycle T, a green light signal of the intersection is turned on successively according to a phase; traffic data at the intersection are monitored in real time, and a green light phase vehicle queuing length p and a vehicle queuing length q of a next green light phase of the intersection are calculated, and a fuzzy logic controller adjusts green time ratios u of all phases of the intersection in real time; and a traffic flow of the intersection is calculated, and a cycle optimization controller determines a signal cycle value T' at a next stage and green light time gei' of all phases. According to the invention, the average number of times for parking and average delay time can be reduced effectively; the road traffic passing efficiency is improved; control of the traffic control system becomes reasonable; and the traffic congestion phenomenon is alleviated fundamentally.

Description

technical field [0001] The invention relates to the technical field of traffic signal control, in particular to a dynamic timing method for traffic signal lights. Background technique [0002] With the continuous development of social economy, the problem of urban traffic congestion is becoming more and more serious. The transportation system is a typical complex system, which is composed of urban transportation facilities and participants, and has the characteristics of complexity, uncertainty, time-varying and non-linearity. It is difficult to describe with mathematical models, so that the existing urban transportation The control system cannot adjust and control the signal lights effectively in real time. In particular, intersections, which are an important part of the urban traffic network, have become the main places where urban traffic congestion occurs. Single-point intersection traffic signal control accounts for more than 90% of urban intersections. Even if line co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/08
CPCG08G1/08
Inventor 鲁斌陈娟杨明晓王茜
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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