KR101825525B1 - System for controlling traffic signal considering vehicles in dilemma zone, and method for the same - Google Patents

System for controlling traffic signal considering vehicles in dilemma zone, and method for the same Download PDF

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Publication number
KR101825525B1
KR101825525B1 KR1020150169784A KR20150169784A KR101825525B1 KR 101825525 B1 KR101825525 B1 KR 101825525B1 KR 1020150169784 A KR1020150169784 A KR 1020150169784A KR 20150169784 A KR20150169784 A KR 20150169784A KR 101825525 B1 KR101825525 B1 KR 101825525B1
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South Korea
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signal
vehicle
dilemma zone
intersection
traffic
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KR1020150169784A
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Korean (ko)
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KR20170064254A (en
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장진환
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한국건설기술연구원
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/86—Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
    • G01S13/867—Combination of radar systems with cameras
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/16—Anti-collision systems
    • G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Traffic Control Systems (AREA)

Abstract

The speed and position of the vehicle approaching the intersection are measured and collected using the image and radar composite detector which is easy to maintain and the detection rate is high. Based on the collected data, it is judged whether any access vehicle exists in the dilemma zone It is possible to control the signal time and to improve the operation of the traffic signal of the intersection to reduce the unnecessary delay of the vehicle occurring at the intersection and to prevent the traffic accident at the intersection according to the dilemma zone, There is provided a traffic signal control system and a method for considering a vehicle in a dilemma zone, which can be easily applied to a local signal intersection where a vehicle speed approaching an intersection is relatively high.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic signal control system and a method of controlling traffic signal in a dilemma zone,

The present invention relates to a traffic signal control system, and more particularly, it relates to a traffic signal control system, in which a speed and a position of a vehicle approaching an intersection are measured using an image and radar composite detector to judge whether an arbitrary approach vehicle exists in a dilemma zone The present invention relates to a traffic signal control system and a method for controlling a traffic signal in a dilemma zone.

According to traffic accident statistics, traffic accidents at intersections every year account for about 40% of all traffic accidents. Most of these intersection traffic accidents are caused by vehicles driving in violation of signals, which is closely related to the Dilemma Zone. In other words, the dilemma zone ahead of the intersection stop line has the potential to cause trouble at any time and drive the driver into the corner, and the driver's dilemma experienced at the intersection amplifies the potential danger of the accident.

For example, when the vehicle is traveling at a constant speed and the signal changes from green to yellow near the intersection entrance, the driver hesitates not to easily determine whether the vehicle should stop or just pass.

FIG. 1 is a view for explaining a concept of a dilemma zone. FIG. 1 is a view for explaining a concept of a dilemma zone in which a vehicle entering a green signal in a direction different from that of a vehicle entering a yellow signal before a stop line Traffic accident.

Referring to FIGS. 1 and 2, it is almost impossible for a driver to make an accurate situation determination and a reasonable decision in a short time when a dilemma situation in which a yellow signal enters at an intersection entrance is due to a physiological response characteristic of a human being. In addition, the risk of a collision with the rear vehicle is latent if the driver suddenly stops at the entrance of the intersection, regardless of whether or not an accurate situation is judged in such a dilemma zone. Even if the passenger crosses the intersection, the intersection vehicle, the crosswalk pedestrian, ) It is inevitably exposed to the risk of continuous collision with vehicles.

As a conventional technique for solving the problem caused by the dilemma zone described above, an appropriate yellow signal display time is set and a traffic light is operated. Such a yellow traffic light is a traffic signal lamp that is displayed after a green traffic light and informs the driver that the red light, which is a stop signal, will soon be displayed to a vehicle entering the intersection.

The display time of these yellow traffic lights should be the time required for vehicles already traveling before the vehicles at the intersection to move completely through the intersection. Theoretically, the display time of this yellow traffic light is proportional to the distance the combined distance of the intersection and the safe stopping distance when one vehicle approaches the intersection with normal approach speed. That is, if the driving vehicle is located between the safe stopping distance and the stop line when the traffic signal changes to yellow, the driving vehicle must be able to travel at the safe stopping distance and the intersection width before the traffic light changes from yellow to green. Should be visible for the time required for the traveling vehicle to leave the intersection.

If the display time of the yellow traffic light is too long, the time required for the vehicle can not be used, the capacity of the entire intersection may be reduced and traffic efficiency may be deteriorated due to traffic congestion. If the display time of the yellow traffic light is too short, There is a risk of causing a collision accident caused by a sudden stop of the vehicle. Therefore, the display time of the yellow traffic light is very important, and it must be designed differently depending on the approach speed of the vehicle and the width or length of the intersection.

3 is a diagram for explaining a dilemma zone according to the vehicle speed.

As shown in FIG. 3, the dilemma zone according to the vehicle speed can be variably set, and it is necessary to adjust the signal time because it is impossible to pass or stop within the yellow signal display time.

However, most of the traffic lights at present have a problem that the traffic efficiency is lowered or the risk of a collision accident is high because the driving speeds of the vehicles entering the intersection are all fixedly assumed to be the same at a predetermined speed.

On the other hand, as a prior art for solving the above-mentioned problems, Korean Patent Registration No. 10-1114968 discloses an invention entitled " Signal control device for three-way intersection and control method thereof " Explain.

FIG. 4 is a block diagram of a signal control apparatus for a three-legged intersection according to the prior art.

4 is a block diagram illustrating a signal control apparatus for a three-legged intersection according to the related art. The apparatus includes a vehicle detector 10, a speed detector 20, a pedestrian passage button 30, an algorithm processing unit 40, , And the vehicle detector 10 includes an image detector 11 and a loop detector 12.

The vehicle detector 10 detects the presence or absence of a left-turn vehicle on the main road and the subway road of the three-way intersection and the state of the waiting vehicle, and outputs the state. Specifically, the image detector 11 of the vehicle detector 10 comprises an image detecting camera and an image detector capable of photographing a predetermined area image of a left-turn vehicle on a main road and a sub-road, respectively. In the vicinity of the stop line of each left turn lane It is determined whether or not there is a stopped vehicle, and at the same time, the number of vehicles waiting in the left-turn lane area is grasped. The loop detector 12 of the vehicle detector 10 is a buried detector that is installed in the direction of an intersection and in a lane so as to detect the presence or absence of a left-turn vehicle on a main road and a subway road, And at least one waiting vehicle.

The speed detector 20 is provided in the main road so as to detect the vehicle speed of the dilemma zone.

The pedestrian traffic button 30 is installed at the crosswalk of each intersection, and the pedestrian green traffic light operates only when the pedestrian presses the traffic button when crossing the pedestrian crossing.

The algorithm processing unit 40 outputs a traffic light control signal to efficiently operate the signal of the three-way intersection.

The signal output unit 50 outputs a signal lamp control signal in accordance with the output signal of the algorithm processing unit 40.

In the case of a signal control device of a three-legged intersection according to the related art, a left-turn vehicle except a straight-ahead vehicle on a main road and a left-turn waiting vehicle entering a stop line on a subway road are automatically detected using a vehicle detector, The traffic signal can be controlled automatically. Further, in the case of the signal control device of the three-legged intersection according to the related art, the straight line signal generation can be extended according to the speed of the vehicle passing through the dilemma zone in the vicinity of the intersection.

However, in the case of the signal control apparatus of the three-legged intersection according to the above-described conventional technique, a loop detector or an image detector is used as a vehicle detector. In such a loop detector, there is a high possibility that the loop coil sensor is disconnected, In the case of a detector, there is a problem that the detection rate is not high, and in the case of the signal control device of the three-way intersection according to the conventional technique, the problem caused by the dilemma zone can not be sufficiently solved.

Meanwhile, the dilemma zone described above can be extended up to several hundred meters. However, the conventional image sensor or radar sensor according to the related art can be installed at a height of about 7 m, There is a problem that it is almost impossible to collect information.

Korean Registered Patent No. 10-1114968 filed on January 12, 2010, entitled "Signal control device for three-way intersection and control method thereof" Korean Patent No. 10-535378 filed on September 18, 2002, entitled " Vehicle auto-sensing traffic signal control method " Korean Patent No. 10-564207 filed on Jan. 7, 2003, entitled "Traffic Signal Control System Using Non-burial Vehicle Detection Sensor" Korean Patent Publication No. 2015-103666 (Publication Date: September 11, 2015), entitled "Intelligent Traffic Control System" Japanese Laid-open Patent No. 2012-103740 (Publication date: May 31, 2012), title of the invention: "Traffic signal control device and traffic signal control method" Japanese Laid-Open Patent No. 2011-186697 (Published on September 22, 2011), entitled "Signal Control Device and Dilemma Sensing Control Method" Japanese Laid-open Patent Application No. 2015-166974 (Publication Date: September 24, 2015), entitled "Traffic Signal Control Device and Traffic Signal Control Method"

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for measuring and collecting the speed and position of a vehicle approaching an intersection using an image and radar composite detector, The present invention is to provide a traffic signal control system and a method thereof that consider a vehicle in a dilemma zone in which a signal time can be adjusted by determining whether an arbitrary access vehicle exists in a dilemma zone based on data.

It is another object of the present invention to provide a vehicle control system and a vehicle control method capable of reducing the unnecessary delay of a vehicle occurring at an intersection by improving the efficiency of a traffic signal operation at an intersection and preventing a traffic accident at an intersection according to a dilemma zone, Signal control system and method therefor.

As a means for achieving the above-mentioned technical object, a traffic signal control system considering a vehicle in a dilemma zone according to the present invention is installed on a support so as to measure and collect velocity and position information of each approaching vehicle approaching an intersection, Video and radar composite detectors; A dilemma zone determination unit which is installed in the traffic signal controller and determines whether any access vehicle exists in the dilemma zone according to the data collected by the image and radar composite detector when the minimum green signal generation time elapses after the green signal is displayed, ; A signal time adjusting unit mounted in the traffic signal controller and adjusting a signal time when there is an approaching vehicle in the dilemma zone according to a result of the determination by the dilemma zone determining unit; A traffic signal lamp for displaying the green signal by extending the green signal display time according to the signal time adjusted by the signal time controller; And an all-red signal lamp that is installed together on the pillar on which the image and radar composite detectors are installed and displays an all-red clearance so as to be verified by a driver in the dilemma zone, Is located at a signal intersection where a traffic accident is likely to be a dilemma zone. It is installed at a 7 m height on a landing line, and detects the position and speed of an intersection access vehicle in a video detection area of 30 m to 120 m and a radar detection area of 30 m to 300 m Lt; / RTI > Wherein the dilemma zone is variably set according to the speed and location information of an access vehicle, and when there is no access vehicle in the dilemma zone, a yellow traffic light is displayed for a predetermined time; If there is an access vehicle in the dilemma zone, the signal time controller adjusts the signal time so that the green signal display time is extended by a predetermined time, or adjusts the signal time so that the all-red clearance is displayed after the yellow signal is displayed .

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According to another aspect of the present invention, there is provided a traffic signal control method for a vehicle in a dilemma zone, the method comprising the steps of: a) displaying a green signal by a traffic signal at an intersection; b) if the green signal is present, determining whether a minimum green signal display time has elapsed; c) if the minimum green signal display time has elapsed, the image and radar composite detector detects the position and speed of the intersection approaching vehicle and collects data; d) determining whether the dilemma zone determination unit is in a dilemma zone according to the collected data; e) when a traffic signal is present in the dilemma zone and there is no vehicle present, displaying a yellow signal; And, if it is determined that there is a vehicle in the dilemma zone, adjusting the signal time adjuster signal to extend a green signal display time or to display an all-red clearance after a yellow signal is displayed, The image and radar composite detector of the step c) is installed at a local signal intersection where a dilemma zone traffic accident is likely to occur. The image and radar composite detector of the step c) Detecting the position and speed of the intersection approach vehicle in the detection area; Wherein the dilemma zone is variably set according to the speed and location information of an access vehicle, and when there is no access vehicle in the dilemma zone, a yellow traffic light is displayed for a predetermined time; If there is an access vehicle in the dilemma zone, the signal time adjustment unit adjusts the signal time so that the green signal display time is extended by the predetermined time, or adjusts the signal time so that the all-red clearance is displayed after the yellow signal is displayed And the entire color signal is additionally installed on the support in step f) so that the vehicle driver in the dilemma zone can confirm the entire color signal.

According to the present invention, the speed and position of a vehicle approaching an intersection are measured and collected using an image and radar composite detector that is easy to maintain and has a high detection ratio, and based on the collected data, It is possible to adjust the signal time.

According to the present invention, unnecessary delay of a vehicle occurring at an intersection can be reduced by improving traffic signal operation of an intersection, and intersection traffic accident caused by a dilemma zone can be prevented.

According to the present invention, a dilemma zone can be easily applied to a local area signal intersection where a vehicle speed approaching an intersection where a traffic accident is a concern is relatively high.

1 is a diagram illustrating a traffic accident occurring at an intersection.
2 is a diagram for explaining the concept of a dilemma zone.
3 is a diagram for explaining a dilemma zone according to the vehicle speed.
FIG. 4 is a block diagram of a signal control apparatus for a three-legged intersection according to the prior art.
5 is a diagram for explaining the principle of a traffic signal control system considering a vehicle in a dilemma zone according to an embodiment of the present invention.
6 is a configuration diagram of a traffic signal control system considering a vehicle in a dilemma zone according to an embodiment of the present invention.
7 is a photograph illustrating an image and a radar composite detector in a traffic signal control system considering a vehicle in a dilemma zone according to an embodiment of the present invention.
8 is a flowchart of a traffic signal control method considering a vehicle in a dilemma zone according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the term "part" or the like, as described in the specification, means a unit for processing at least one function or operation, and may be implemented by hardware, software, or a combination of hardware and software.

[Traffic signal control system considering vehicle in dilemma zone]

5 is a diagram for explaining the principle of a traffic signal control system considering a vehicle in a dilemma zone according to an embodiment of the present invention.

As described above, the dilemma zone is an area where it is impossible for the driver to safely stop the vehicle at the intersection stop line after the driver recognizes the yellow signal, and the intersection can not be completely released during the yellow signal time.

5, a traffic signal control system considering a vehicle in a dilemma zone according to an embodiment of the present invention includes an image and radar composite detector for measuring a speed and a position of a vehicle approaching an intersection, , It is determined whether an arbitrary access vehicle exists in the dilemma zone, and accordingly the signal time is adjusted to extend the green signal display time or to display the full color signal. Here, all-red clearance is operated separately from the yellow signal in order to avoid a collision between the vehicle that has not departed the intersection and the pedestrian (bicycle) at the intersection when the signal time is changed at the intersection.

A traffic signal control system considering a vehicle in a dilemma zone according to an embodiment of the present invention uses an image and radar composite detector which is easy to maintain and has a high detection rate, To collect the speed and position information of the vehicle in the dilemma zone, and to adjust the signal time based on the collected data. Here, the image detection area that can be detected by the image and radar composite detector is about 120 m, and the radar detection area is about 300 m, but the present invention is not limited thereto.

FIG. 6 is a block diagram of a traffic signal control system considering a vehicle in a dilemma zone according to an embodiment of the present invention. FIG. 7 is a block diagram of a traffic signal control system considering a vehicle in a dilemma zone according to an embodiment of the present invention. This is a photograph illustrating a radar composite detector.

6, a traffic signal control system considering a vehicle in a dilemma zone according to an embodiment of the present invention includes an image and radar composite detector 100, a traffic signal controller 200, a traffic signal lamp 300, The traffic signal controller 200 includes a dilemma zone determination unit 210, a green signal generation time determination unit 220, a signal time adjustment unit 230, a signal light driving unit 240, And a signal lamp driving unit 250.

The video and radar composite detector 100 measures and collects the velocity and position information of each of the approaching vehicles approaching the intersection. Here, the image and radar composite detector 100 is installed in the pillar 500 at a height of 7 m, and detects the position and speed of the intersection approaching vehicle in the video detection area of 30 m to 120 m and the radar detection area of 30 m to 300 m, And it is preferable that the vehicle is installed at a local intersection where a vehicle speed approaching an intersection where a dilemma zone traffic accident is a concern is relatively high. Also, the image and radar composite detector 100 may be an integrated image and radar composite detector as shown in FIG. 7a), or may be a separate image and radar composite detector, as shown in FIG. 7b) . Particularly, the separate type image and radar composite detector is designed for a straight line section of an arterial road and a highway, and can detect a position and a speed of the vehicle in a detection range of 500 m.

The dilemma zone determination unit 210 is installed in a typical traffic signal controller 200 and when the minimum green signal display time elapses after the green signal is displayed, the dilemma zone determination unit 210 determines the dilemma zone based on the data collected by the video and radar composite detector 100 It is determined whether any access vehicle exists in the dilemma zone.

The green signal display time determination unit 220 determines whether the minimum green signal display time has elapsed after the green signal is displayed.

The signal time adjusting unit 230 is mounted in a conventional traffic signal controller 200 and adjusts the signal time when there is an approaching vehicle in the dilemma zone according to the determination result of the dilemma zone determination unit 210. [ That is, when there is an access vehicle in the dilemma zone, the signal time adjustment unit 230 adjusts the signal time so that the green signal display time is extended by a predetermined time, or adjusts the signal time so that the full color signal is displayed after the yellow signal is displayed .

The signal lamp driver 240 is mounted in a conventional traffic signal controller 200 and drives the traffic signal lamp 300 so that the green signal display time is extended according to the signal time adjusted by the signal time controller 230.

The all-red traffic light driving unit 250 is installed in the traffic signal controller 200 and displays the full color signal after the yellow signal is displayed according to the signal time adjusted by the signal time adjusting unit 230 .

The traffic signal lamp 300 extends the green signal display time according to the signal time adjusted by the signal time controller 230. At this time, the dilemma zone is variably set according to the speed and position information of an access vehicle, and when there is no approaching vehicle in the dilemma zone, a yellow traffic light is displayed for a predetermined time.

The entire red color signal lamp 400 may be displayed on the support 500 to be visible to the driver of the vehicle in the dilemma zone. That is, in order to avoid a collision between the vehicle that has not departed from the intersection and the vehicle in the opposite direction, the pedestrian of the intersection, or the bicycle when the signal time is changed at the intersection, an all-red signal lamp 400 is installed separately from the yellow signal to operate the entire color signal .

In other words, in the traffic signal control system considering the vehicle in the dilemma zone according to the embodiment of the present invention, after the green signal is started and the predetermined minimum green signal display time has elapsed, the image and radar composite detector 100 The speed and position of the vehicle traveling within the vehicle detection area of several hundred meters are measured. If there is no vehicle present in the dilemma zone, a yellow traffic light is displayed. However, if there is a vehicle present in the dilemma zone, the green signal display time is extended for a predetermined time or the full color signal is displayed after the yellow signal is displayed .

In this case, since there is no vehicle passing through the intersection when the green signal in the opposite direction is displayed, it is possible to reduce traffic accidents in the intersection. In addition, since unnecessary green signal display time can be terminated early, unnecessary vehicle lag can be reduced by increasing the intersection capacity.

The traffic signal control system considering the vehicle in the dilemma zone according to the embodiment of the present invention can basically be applied to all the signal intersections. In particular, the traffic signal control system considering the vehicle speed in the vicinity of the intersection where the dilemma zone traffic accident It is preferable to apply to an intersection.

According to the embodiment of the present invention, the speed and position of a vehicle approaching an intersection are measured and collected using an image and radar composite detector which is easy to maintain and has a high detection ratio, and based on the collected data, It is possible to judge whether or not the vehicle exists in the dilemma zone, and to adjust the signal time, thereby preventing an intersection traffic accident according to the dilemma zone.

[Traffic signal control method considering the vehicle in the dilemma zone]

8 is a flowchart of a traffic signal control method considering a vehicle in a dilemma zone according to an embodiment of the present invention.

Referring to FIG. 8, in a traffic signal control method considering a vehicle in a dilemma zone according to an embodiment of the present invention, a traffic signal lamp 300 displays a green signal at an intersection (S110).

Next, when the green signal is displayed, it is determined whether a minimum green signal display time has elapsed (S120).

Next, when the minimum green signal display time has elapsed, the video and radar composite detector 100 detects the position and speed of the intersection approaching vehicle and collects data (S130). Here, the image and radar composite detector 100 is installed in the pillar 500 at a height of 7 m, and detects the position and speed of the intersection approaching vehicle in the video detection area of 30 m to 120 m and the radar detection area of 30 m to 300 m, And the video and radar composite detector 100 is installed at a local intersection where the vehicle speed is relatively high, which approach the intersection where a dilemma zone traffic accident is likely to occur.

Next, according to the collected data, the dilemma zone determination unit 210 determines whether there is a vehicle in the dilemma zone (S140).

Next, when it is determined that there is no vehicle in the dilemma zone, the traffic light 300 displays a yellow signal (S150). At this time, the dilemma zone is variably set according to the speed and position information of an access vehicle, and when there is no approaching vehicle in the dilemma zone, a yellow traffic light is displayed for a predetermined time.

Next, if it is determined that there is a vehicle in the dilemma zone, the signal time adjustment unit 230 adjusts the signal to extend the green signal display time or display the full color signal after the yellow signal is generated (S160). That is, when there is an access vehicle in the dilemma zone, the signal time adjustment unit 230 adjusts the signal time so that the green signal display time is extended by a predetermined time, or adjusts the signal time so that the full color signal is displayed after the yellow signal is displayed . At this time, an all-red signal lamp 400 for displaying the full color signal is additionally installed on the strut 500 so that the vehicle driver in the dilemma zone can see it.

As a result, according to the embodiment of the present invention, the speed and position of a vehicle approaching an intersection can be measured and collected using an image and radar composite detector that is easy to maintain and has a high detection ratio, The signal time can be adjusted by judging whether or not the access vehicle exists in the dilemma zone.

In addition, according to the embodiment of the present invention, unnecessary delay of a vehicle occurring at an intersection can be reduced by improving the traffic signal operation of an intersection, and intersection traffic accident caused by a dilemma zone can be prevented. For example, it is possible to reduce the number of vehicle stoppage at the intersection, reduce the number of times of intersection stoppage of the vehicle, reduce the number of times of red-light running according to the dilemma zone, It has been found that it can reduce the red-light running of the vehicle.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Image and radar composite detector
200: Traffic signal controller
210: Dilemma zone judgment unit
220: green signal generation time determination unit
230: signal time adjustment unit
240:
250: All red traffic light driver
300: Traffic lights
400: All red traffic lights
500: holding

Claims (10)

An image and radar composite detector 100 installed on the pillar 500 to measure and collect velocity and position information of each of the access vehicles approaching the intersection;
When the minimum green signal display time has elapsed after the green signal is displayed in the traffic signal controller 200, an arbitrary access vehicle is operated in accordance with the data collected by the video and radar composite detector 100. The dilemma zone A dilemma zone judging unit 210 for judging whether or not the user exists within the user zone;
A signal time adjusting unit (230) mounted in the traffic signal controller (200) for adjusting a signal time when there is an approaching vehicle in the dilemma zone according to the determination result of the dilemma zone determination unit (210);
A traffic signal lamp (300) for displaying the green signal by extending the green signal display time according to the signal time adjusted by the signal time controller (230); And
And an all-red traffic light (400) installed together on the pillar (500) on which the video and radar composite detector (100) is installed and displaying an all-red clearance so that the vehicle driver in the dilemma zone can see it However,
The video and radar composite detector 100 is installed at a local signal intersection where a dilemma zone traffic accident is likely to occur. The video and radar composite detector 100 is installed in the pillar 500 at a height of 7 m and has a video detection area of 30 m to 120 m, Detecting the position and speed of the intersection approaching vehicle in the radar detection area of the intersection; Wherein the dilemma zone is variably set according to the speed and location information of an access vehicle, and when there is no access vehicle in the dilemma zone, a yellow traffic light is displayed for a predetermined time; If there is an access vehicle in the dilemma zone, the signal time adjustment unit 230 adjusts the signal time so that the green signal display time is extended by a predetermined time, or the All-Red Clearance is displayed after the yellow signal is displayed And the signal time is adjusted. delete delete delete delete a) a traffic signal lamp 300 displays a green signal at an intersection;
b) if the green signal is present, determining whether a minimum green signal display time has elapsed;
c) if the minimum green signal display time has elapsed, the image and radar composite detector 100 detects the position and speed of the intersection approaching vehicle and collects data;
d) determining whether the dilemma zone determination unit 210 has a vehicle in the dilemma zone according to the collected data;
e) when the traffic signal lamp (300) judges that there is no vehicle in the dilemma zone, displaying a yellow signal; And
f) If the vehicle is found in the dilemma zone, the signal time adjustment unit 230 adjusts the signal to extend the green signal display time or to display the all-red clearance signal after the yellow signal is displayed Including,
The video and radar composite detector 100 in the step c) is installed at a signal intersection of a local part where a traffic accident is likely to be a dilemma zone and is installed in the pillar 500 at a height of 7 m and has a video detection area of 30 m to 120 m And a position and a speed of an intersection approaching vehicle in a radar detection area of 30 m to 300 m; Wherein the dilemma zone is variably set according to the speed and location information of an access vehicle, and when there is no access vehicle in the dilemma zone, a yellow traffic light is displayed for a predetermined time; If there is an access vehicle in the dilemma zone, the signal time adjustment unit 230 adjusts the signal time so that the green signal display time is extended by a predetermined time, or the All-Red Clearance is displayed after the yellow signal is displayed And the entire color signal is displayed so that the driver of the vehicle in the dilemma zone can confirm the entire color signal lamp 400 installed in the support 500 in step f) Traffic signal control method considering vehicle. delete delete delete delete
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CN115346384B (en) * 2022-08-19 2024-02-09 西北工业大学 Traffic intersection-oriented vehicle safe passing guiding method, device and system

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KR101432512B1 (en) * 2014-02-17 2014-08-25 (주) 하나텍시스템 Virtual image displaying apparatus for load control

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KR20230164975A (en) 2022-05-26 2023-12-05 한국건설기술연구원 Traffic signal system for preventing sudden deacceleration of vehicle, and traffic signal providing method for the same

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