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Crossroad traffic signal lamp real time dynamic timing method

A technology for traffic lights and intersections, which is applied in the field of real-time dynamic timing of traffic lights at intersections. It can solve the problems that the fixed timing method cannot meet the needs of traffic management, so as to reduce the average delay time of vehicles, improve traffic capacity, and avoid frequent vehicles. The effect of start and stop

Inactive Publication Date: 2016-10-12
JILIN UNIV
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Problems solved by technology

However, with the development of the automobile industry and the continuous complexity of urban traffic, the fixed timing method can no longer meet the needs of traffic management

Method used

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  • Crossroad traffic signal lamp real time dynamic timing method

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0035] see figure 1 As shown, the embodiment of the present invention provides a method for real-time dynamic timing of traffic lights at intersections, including the following steps:

[0036] S1. Define the phases of each traffic flow direction at the intersection, and determine the saturation flow S of each phase i ;

[0037] S2. Measure the current flow of multiple groups of each phase to obtain the maximum current flow q of each phase imax ;

[0038] S3. Calculate the relative maximum flow ratio y of each phase imax and intersection traffic intensity Y;

[0039] S4. Design the objective function according to the average delay time, average parking rate, and average traffic capacity, and solve the objective function to obtain the theoretical effective green light time G of each phase i ;

[0040] S5. According to the theoretical effe...

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Abstract

The invention discloses a crossroad traffic signal lamp real time dynamic timing method, relating to the road traffic control field. The crossroad traffic signal lamp real time dynamic timing method comprises steps of defining phases of various traffic flow directions of a crossroad, determining a saturation flow of each phase, measuring multiple current flows of each phase, obtaining a biggest current flow of each phase, calculating a relative biggest flow ratio of each phase and crossroad flow intensity, designing a target function and solving the target function to obtain a theoretical effective green light time of each phase, determining a signal lamp cycle time according to the theoretical effective green light time of each phase and crossroad signal lamp total loss time, and determining the practical effective green light time of each phase according to a ratio of the relative biggest flow ratio of each phase to crossroad flow intensity in the signal lamp cycle. The crossroad traffic signal lamp real time dynamic timing method avoids the fact that the vehicle starts and stops frequently in a congestion road due to the short cycle, improves a traffic capacity of the congestion road, reduces the parking rate of the congestion rate and has good robustness.

Description

technical field [0001] The invention relates to the field of road traffic control, in particular to a method for real-time dynamic timing of traffic lights at intersections. Background technique [0002] Traffic lights at intersections are currently the most widely used traffic flow control method, and most common traffic lights at intersections are controlled by means of fixed traffic light time. This control method sets the time length of traffic lights in each direction empirically according to the traffic situation at a specific crossing, that is, the green time of each direction is set according to the size of the traffic flow in this crossing in general. The early fixed timing traffic lights played an important role in avoiding traffic conflicts and preventing traffic accidents. However, with the development of the automobile industry and the continuous complexity of urban traffic, the fixed timing method can no longer meet the needs of traffic management. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/08
CPCG08G1/08
Inventor 张晋东贾晓燕谭仕杰冯李灯何俊希
Owner JILIN UNIV
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