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Traffic signal control method and system for preventing intersection congestion when visibility is low

A traffic signal and control method technology, applied in the field of intelligent transportation, can solve problems such as traffic paralysis, failure to use visibility monitoring and signal control, and jamming, so as to achieve the effect of smooth driving

Inactive Publication Date: 2017-05-24
北京博研智通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] What the present invention aims to solve is that the combined mode of visibility monitoring and signal control cannot be adopted in the prior art. In the case of decreased visibility, the period of the signal light, the control parameter of the green signal ratio and the signal light can be adjusted in real time according to the number of times the motor vehicle encounters a red light at the intersection. Clear the full red time of the intersection, while improving the traffic efficiency of the intersection, change the full red time of the signal light in real time according to the vehicle stranded situation in the intersection, so as to avoid the traffic jam of the intersection and lead to the problem of traffic paralysis in a region or even a city

Method used

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  • Traffic signal control method and system for preventing intersection congestion when visibility is low
  • Traffic signal control method and system for preventing intersection congestion when visibility is low
  • Traffic signal control method and system for preventing intersection congestion when visibility is low

Examples

Experimental program
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Embodiment 1

[0050] This embodiment provides a flow chart of a traffic signal control method for avoiding congestion at intersections when visibility is low, as figure 1 shown, including the following steps:

[0051] S1: Monitor the visibility of the intersection in real time, accurately track the motor vehicles in each direction of the intersection on a continuous plane, and obtain the number of motor vehicles in each direction, the instantaneous speed and precise position of each motor vehicle in real time. When the instantaneous speed of the motor vehicle continues to be zero, it is determined that the motor vehicle is in a stopped state; figure 2 shown. Wherein, the visibility detection can be realized by using the existing visibility detection technology. In this step, the result of the visibility detection is obtained directly. The setting area of ​​a visibility detection device is marked in the figure. In fact, one visibility detection result can be shared by multiple intersecti...

Embodiment 2

[0058] On the basis of embodiment 1, the following steps are also included between the step S3 and the step S4:

[0059] An electromagnetic wave signal corresponding to the light color information of the signal light is generated, and the electromagnetic wave signal is sent to the electromagnetic wave receiving device on the vehicle. Specifically, the signal light color information includes the current signal light color and the remaining time of the current signal light color.

[0060] For the driver, in the case of low visibility, it is difficult to see the situation of the long-distance intersection signal light, and the signal light at the intersection does not change according to the repeated light color change cycle, which is not easy for the driver. Get the traffic light situation. Therefore, the solution in this embodiment adopts an electromagnetic wave method to transmit corresponding signals. Correspondingly, the vehicle is provided with a receiving device for rece...

Embodiment 3

[0062] On the basis of embodiment 1 or embodiment 2, this embodiment realizes the scheme in step S2 through the following manner, as image 3 shown, including the following steps:

[0063] S21: Record the number of times each motor vehicle waits to stop at a red light before crossing the stop line; wherein the initial value of the number of times each motor vehicle stops to wait at a red light is zero; specifically, a driving state table can be established to record each The driving state of a motor vehicle, the driving state includes the number of times each motor vehicle stops and waits at a red light before crossing the stop line; The initial value of parking waiting times is zero;

[0064] S22: Determine whether the first direction is a red light, if so, execute step S23, otherwise execute step S24;

[0065] S23: For the first direction, add 1 to the number of parking times of existing motor vehicles, and obtain the highest number of times K1 of waiting for red lights in...

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Abstract

The invention provides a traffic signal control method and system for preventing intersection congestion when visibility is low. The traffic signal control method and system can carry out continuous tracking on motor vehicles, and meanwhile, monitor visibility; when signal lamp control is carried out, control is carried out according to red-lamp stop frequency of the motor vehicles in different directions; besides, when the visibility of an intersection is low and when a green lamp signal in any direction is over and signal lamp color is to be changed, the motor vehicles, which have already entered the intersection, are monitored to judge whether the motor vehicles in the intersection have already been driven away; and if the motor vehicles in the intersection have not been completely driven away, signal lamp all-red time is prolonged until the motor vehicles in the intersection have been completely driven away. According to the technical scheme, when the visibility is low, the vehicles can also drive smoothly under the condition of ensuring safety, thereby preventing causing intersection congestion due to low visibility.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a traffic signal control method and system for avoiding intersection congestion when visibility is low. Background technique [0002] With the continuous expansion of the city scale, the rapid increase of motor vehicles, the traffic management department generally installs signal control machines at intersections that meet the standards for installing signal machines to control the orderly and efficient passage of motor vehicles through the intersection. How to ensure efficient and orderly passage at intersections under normal weather and reduced visibility is the focus of attention. [0003] When the visibility drops to a certain level, it has always been the goal pursued by managers to ensure that the intersection is not blocked. According to the statistics in recent years, traffic jams at intersections with reduced visibility have occurred from time to time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/08
CPCG08G1/08
Inventor 姜廷顺李萌朱朝晖王军利侯文宇尹胜超
Owner 北京博研智通科技有限公司
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