KR101114968B1 - A 3-bridge crossroad's signal control apparatus and the method thereof - Google Patents

Abstract

Disclosed are a signal control apparatus and a control method of three intersections.
The present invention controls the straight ahead signal and the left turn signal in response to the presence of a left turn vehicle and the number of waiting vehicles, and at the same time, checks the speed with a speed detector of the dilemma zone before the end of the straight signal to extend the display of the straight signal or pedestrian traffic. By omitting or displaying the left turn signal according to the presence or absence of a button, the signal operating system can be efficiently managed and the accident at the intersection can be prevented in advance.

Description

Signal control device of three intersections and its control method {A 3-BRIDGE CROSSROAD'S SIGNAL CONTROL APPARATUS AND THE METHOD THEREOF}

The present invention relates to the control of traffic lights at intersections, and more particularly, to manage the signal system safely and efficiently according to the presence of vehicles, the amount of waiting vehicles, and the presence of traffic at three intersections where there are many straight vehicles but irregular left turn traffic. The present invention relates to a signal control device and a control method of a three-way intersection that can prevent an accident in advance through signal extension according to the dilemma zone.

In general, most of Korea's national roads have a naturally occurring form and composition, and thus have various characteristics for each region.The characteristics of these roads have a characteristic of crackdowns that are interrupted by traffic lights, but the distance between intersections is somewhat different. It is well known that it has a characteristic of continuous flow because of its long length.

In addition, most intersections of national roads are connected to small village roads, and these roads have very little traffic, but some national roads are in serious traffic problems due to the lack of proper traffic system due to large factories and new town development. Acquisition and proper signal control become very important.

The unbalanced intersection with the apartment access road or the back road on the downtown road is the same as the national road.

At present, the traffic lights of T- or + -shaped intersections that have a small amount of traffic in and out of the road are operated in accordance with a periodic signal system operated by a fixed signal cycle during the day, and operate as a blinking yellow signal at night. Most are operated by traffic signals.

However, during the day, the flow of the straight vehicle is stopped due to the left turn signal of the intersection or the traffic is stagnated due to a signal more than necessary, and when the flashing signal is operated at night, the communication of the vehicle can be maintained smoothly but without signal There is an inherent risk of accidents caused by vehicles.

Therefore, there is a need for a method that can efficiently operate signals according to the traffic volume at three-way intersections where the traffic volume on the secondary road is very small or irregular compared to the straight traffic.

In addition, the dilemma zone in front of the intersection stop line-the distance of about 2-3 seconds to the stop line square-is an area where problems can arise and drive the driver at any time.

The driver's dilemma experienced at signal intersections amplifies the potential risk of an accident. When the vehicle runs at a constant speed and the signal changes from green to yellow near the entrance to the intersection, the driver is hesitant to decide whether to stop or just cross over.

That is, it is almost impossible for the driver to make accurate situation determination and rational decision making in a short time when the dilemma situation where the yellow signal comes from the intersection entrance is impossible. In addition, there is a potential risk of a collision with the back of the car if you stop at the entrance of the intersection without deciding whether the situation is correct in the dilemma zone, and even if you cross the intersection, cross vehicles entering the other direction, pedestrian crossings, U-turn vehicles, etc. It is inevitable that you will be exposed to a continuous collision risk.

In order to solve the above problem, the present invention automatically uses a vehicle detecting means (image detecting means or loop detecting means) to make a left turning vehicle entering a stop line of a left road vehicle and a secondary road except a straight vehicle of a main road. It is an object of the present invention to provide a signal control device and a control method of a three-way intersection capable of detecting and automatically controlling traffic signals.

Another object of the present invention is to provide a signal control device and a control method of a three-way intersection that can control the omission of the left turn display time according to the presence or absence of a pedestrian passage button.

Another object of the present invention is to provide a signal control device and a control method of a three-way intersection capable of extending a straight signal manifestation according to a speed of a vehicle passing through a dilemma zone near an intersection.

In order to achieve the above object, the signal control apparatus of a three-way intersection of the present invention is based on the presence or absence of a left-turning vehicle and the number of waiting vehicles and the number of waiting-turning vehicles on the main road from the vehicle detecting means. Accordingly, it may include an algorithm processing unit for outputting a control signal so as to omit or early termination of the left turn manifest in the periodic signal and a signal output unit for controlling the traffic light according to the control signal of the algorithm processing unit.

If the algorithm processing unit determines that the left turn vehicle of the driveway is present before the straight forward time of the driveway is terminated, the control unit performs a left turn display on the signal output unit at the preset time signal of the left turn of the driveway. But control to terminate the predetermined left turn display time according to the number of the waiting vehicle early,

If it is determined that there is a left turn vehicle on the sub-road before the left turn on the main road is terminated, the predetermined periodic signal is controlled to display a left turn on the signal output unit at the left turn time on the negative road. The control unit is configured to early terminate the predetermined left turn display time according to the number, and to display the next signal-the straight ahead signal-when the left turn display time of the negative road ends.

In addition, if the algorithm processing unit determines that the left turn vehicle on the sub-road is not present in the extended straight manifestation that is progressed by omitting the left turn display of the main road or the left turn display of the main road, the left turn display time of the sub-road in the periodic signal The control unit is omitted to extend the display of the straight forward time until the preset straight time of the main road.

It is configured to further include a pedestrian passage button on the signal path of the main road or secondary road, and if it is determined that the pedestrian passage button is input, the algorithm processing unit transmits the corresponding pedestrian traffic green signal at the predetermined left turn time set in the periodic signal. Characterized in that the control to display a predetermined time.

And a speed detecting means for detecting the vehicle speed of the dilemma zone as a driving lane and changing the speed of the vehicle from the straight forward signal of the driving lane to the next manifestation signal when the speed of the vehicle detected by the speed detection means passes through the intersection dilemma. In the case of the speed of exiting, it is desirable to maintain the current straight signal.

On the other hand, the signal control method of the three-way intersection signal control apparatus, (a) controlling the algorithm processing unit to display the periodic signal system of the three-way intersection, (b) the algorithm processing unit vehicle detection means (image detection means) Or determining the presence or absence of the left-turning vehicle and the number of the standby vehicles and the number of the left-turning vehicle and the number of the standby vehicles from the loop detection means) (c) Outputting a control signal for omitting or prematurely terminating the left turn in the periodic signal system according to the determination result of the number of vehicles and the number of vehicles left and the left vehicle, and (d) the step (c) Controlling the traffic light according to the output signal can be made.

In the step (c), (c-1) the algorithm processing unit determines whether the straight forward time ends in the main road, and (c-2) the step of determining the straight forward time ends in the step (c-1). Determining whether there is a left-turning vehicle in the driving lane and the number of waiting vehicles; and (c-3) if it is determined that a left-turning vehicle exists in the step (c-2), the driving cycle is set by the predetermined periodic signal. And performing a left turn indication of the main road at the left turn time of the controller and controlling to terminate the preset left turn time according to the number of waiting vehicles left to turn, and the step (c-3) may be performed. If it is determined in step (c-2) that the left turn vehicle does not exist, the left turn display time of the main road is omitted from the predetermined periodic signal and the straight forward display is extended to the left turn display time of the predetermined road. And it is desirable to control so as to display.

And, step (c) is again (c-4) determining whether the algorithm processing unit before the end of the left turn display time of the main road and (c-5) the left turn display of the main road in step (c-4) Determining whether there is a left turn vehicle and the number of waiting vehicles when it is determined to be before the end of time; and (c-6) when the left turn vehicle is present in step (c-4), the predetermined periodic signal And displaying a left turn indication of the sub-road at the left turn-present time of the sub-road and controlling the predetermined left turn-present time to be terminated early according to the number of waiting vehicles left to turn. In step (c-4), if it is determined that the left turn vehicle does not exist, it is preferable to control to display the straight forward appearance of the main road in the predetermined periodic signal.

The method may further include receiving a pedestrian passage button of the main road or a secondary road, and if the algorithm processor determines that the pedestrian passage button is input, the pedestrian green signal corresponding to the current time preset by the periodic signal. To be displayed.

And the speed detection means detects the vehicle speed of the dilemma zone by driving and the algorithm processing unit detects the vehicle speed detected by the speed detection means when changing from the direct manifestation signal of the main road to the next manifestation according to the detected vehicle speed. If the speed at which the speed falls in the intersection passing dilemma can be controlled to maintain the current manifestation signal for a certain time.

Therefore, according to the present invention, by using the signal operation method based on the response signal control and using the pedestrian passage button as a way to compensate for the problem of the three-way intersection that is inefficient operation due to the existing periodic signal control, The signaling system can be operated more safely and efficiently.

According to the signal system of the present invention, when the traffic volume on the secondary road is low or irregular, it grasps the traffic demand of the left turn and applies the response response to minimize the loss time generated by the left turn signal on the secondary road and the main road, and to communicate with the main road. It can reduce the delay of intersection by preventing the traffic accident and can prevent the traffic accident of intersection due to signal violation.

In addition, according to the signal system of the present invention to minimize the dilemma vehicle to pass through the intersection by extending the straight signal according to the vehicle speed of the dilemma zone before the end of the straight signal to promote the safety of the intersection and accidents that may occur at the intersection There is an effect that can be prevented in advance.

1 is a block diagram of a signal control apparatus according to an embodiment of the present invention;
2 is a view illustrating a periodic signal system of three intersections of the present invention,
3 is a view illustrating the left turn manifest omission and early termination of the present invention,
4 is a diagram illustrating a configuration diagram of three intersections according to an embodiment of the present invention;
5 is a flowchart illustrating a signal control method of the present invention;
6 is a flowchart illustrating a signal control method according to a pedestrian traffic button;
And,
7 is a flowchart illustrating a signal control method according to a speed detected in a dilemma zone.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may properly define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, except to exclude other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. have.

The terms used below are defined as follows.

A 'dilemma zone' is a zone that causes a dilemma in decision making and situational judgment by the driver of an approaching vehicle at the intersection of a yellow light on a signal crossing and whether the driver will stop or go through the intersection.

'Vehicle detection means' refers to a device that helps the signal control device to perform efficient signal control by determining the presence or absence of a vehicle such as an image detection means or a loop detection means.

The 'image detecting means' is a video device capable of capturing and outputting an image of a predetermined region so as to predict a left-turning waiting vehicle or a left-turning entry vehicle in a predetermined direction and predicting a vehicle to turn left.

'Loop detection means' refers to a device that can detect a left turn waiting vehicle or a left turn entry vehicle by embedding a loop detector at a left turn entrance part and a left turn stop line.

'Speed detection means' refers to a device that can detect and output the speed of the vehicle entering the dilemma zone.

'Periodical signal' is a signal control method used in most intersections in Korea.It is fixed control method, which is a method of controlling traffic lights by applying a signal operation plan, which is given as a direct value according to the operator's judgment, and is input into the database in advance. Time-of-day control (TOD Control) that controls traffic lights according to the same present method and time length from time-of-day signal operation plan and time-of-day and real-time control to create and control new signal operation plan every cycle There is a method and the like in common to all the above-mentioned signal control method means a method of pre-determining the present time distribution in the signal period and performing the determined present time as it is, in the present invention, such a signal control method is called a periodic signal.

'L / P (Left / Pedestrian) Confirmation Time' means the presence of left turn vehicles and pedestrians on the main road immediately before the end of the straight road, or the presence of left turn vehicles and pedestrians on the side road just before the end of the left turn road. Say time to figure it out.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a signal control apparatus according to an embodiment of the present invention, as shown in the signal control apparatus 100 of the present invention to determine the presence of the left vehicle and the state of the standby vehicle on the main road and the secondary road The vehicle detection means 120 to output the vehicle speed, the speed detection means 130 provided in the main road to detect the vehicle speed of the dilemma zone, the pedestrian passage button 140 installed at the crosswalk of each intersection, the signal of the three intersections It comprises an algorithm processing unit 110 for outputting a traffic light control signal for efficient operation, and a signal output unit 150 for outputting a traffic light control signal in accordance with the output signal of the algorithm processing unit 110.

The vehicle detecting means 120 is configured by the image detecting means 122 or the loop detecting means 124 to detect the presence of the left turn vehicle and the number of waiting vehicles on the main road and the secondary road of the three intersections, and the detected vehicle data. Configure to output

The image detecting means 122 is composed of an image detecting camera and an image detector capable of capturing a predetermined area image of a left turning vehicle on a main road and a secondary road, respectively, and determines whether the vehicle is stopped near the stop line of each left turning lane. At the same time, the number of vehicles waiting in the left turn lane area can be determined.

The loop detecting means 124 is a buried detector, which is divided into directions and lanes of an intersection and is installed at one or more stop lines and waiting vehicles in order to detect the presence of a left turn vehicle and a waiting vehicle on a main road and a secondary road. do. Since the loop detector operates in the same configuration as a conventional loop detector, its detailed description is omitted.

The speed detecting means 130 is composed of a vehicle detector capable of detecting the speed of the vehicle passing through the dilemma zone, the pedestrian passage button 140 is a pedestrian green traffic light only when the pedestrian tries to cross the crosswalk. It is configured to work.

Therefore, when the pedestrian does not press the pedestrian button, the pedestrian signal is not activated. Even when the pedestrian traffic button is pressed, the pedestrian traffic light does not operate immediately but operates only after the signal cycle.

An embodiment in which the image detecting means 122, the speed detecting means 130, and the pedestrian passage button 140 are installed is illustrated in FIG. 4.

In the present invention, an embodiment of the present invention will be described by applying the image detecting unit 122 of the vehicle detecting unit 120.

4 is a diagram illustrating a configuration of a three-way intersection, as shown in the left turn image detection means 122a and the secondary road left turn image detection means 122b as the main road image detection means at the three intersections, pedestrian traffic As a button, the pedestrian passage button 142, the secondary road pedestrian passage button 144, and the speed detecting means 130, the speed of the road to detect the passing vehicle speed of the dilemma zone located in a certain area of the main road. The detecting means 132 and 134 are provided.

In particular, the left turn image detecting means 122a of the main road is configured to capture a certain area (area 1) so as to grasp the number of stopped vehicles and waiting vehicles so that the left turn vehicle of the main road can be identified, and the left turn image detection means of the secondary road. The means 12b is also fixedly installed so that the predetermined area (area 2) can be photographed so as to grasp the left turn stop vehicle and the number of waiting vehicles on the sub-road.

The algorithm processing unit 110 receives the number of left-turn vehicles and waiting vehicles output from the image detecting means 122a and 122b and the speed of the vehicle detected by the speed detecting means 130 and the signal of the pedestrian passage button 140. It is configured to operate efficiently.

To this end, the algorithm processing unit 110 receives from the image detection means 122a and 122b the presence or absence of the vehicle stopped near the stop line of each left turn lane and the number of vehicles waiting in the left turn lane area.

The operation of the algorithm processing unit 110 will be described with reference to FIGS. 2 to 4.

FIG. 2 is a diagram illustrating a typical periodic signal system of a three-way intersection of the present invention, FIG. 3 is a diagram illustrating omitting and early termination of a left turn of the present invention, and FIG. 4 is an embodiment of the present invention. It is a figure which showed the block diagram of the three branch intersection by this.

The algorithm processing unit 110 operates to operate the periodic signal system to control the signal at the intersection through the signal output unit 140.

For convenience of description, the present invention will be described based on a general signal system of three intersections. However, the present invention is not limited thereto, and it can be applied to all signal control methods that can be used at intersections such as fixed control, time zone control, and real time control.

Referring to FIG. 2, the periodic signal system first displays a bidirectional straight signal of the main road from "A" to "B", and then displays a left turn signal of the road from "B" to "C". From the "C" time point to the "A" time point, it consists of the signal cycle which displays the left turn signal of a negative road, and displays it.

This periodic signal system is preferably applied to intersections with many straight vehicles but irregular road traffic, especially at three intersections.

The periodic signal system of FIG. 2 is fixed and is displayed at a constant cycle regardless of the traffic volume.

The present invention reflects such a sensitive signal system in the fixed type. Referring to FIG. 3, immediately before the bidirectional present time of the main road ends and immediately before the end of the left turn time of the main road, as shown in FIG. Set the L / P check time to operate the signal efficiently.

That is, the first L / P check time is performed immediately before the end of the straight road time of the main road, the left turn vehicle, the waiting vehicle, and the presence of a pedestrian signal on the main road are checked. It is to check the presence of left turn vehicle, waiting vehicle and pedestrian signal on the sub-road after the L / P confirmation time.

As a result of the check, if there is no left turn vehicle on the main road and no pedestrian signal is input on the secondary road, the straight forward time on the main road is displayed until the preset regular left turn time.

In the case of extending and displaying the straight present time of the main road, it is configured not to exceed the predetermined periodic left turn display time of the main road (B-C section).

In addition, if the check result indicates that there is a left turn vehicle in the main road, the left turn display is indicated at the predetermined cycle-type left turn display time (BC section) of the main road, but the left turn display time is shortened according to the presence and the number of waiting vehicles. To display.

Of course, even if there are many left-turn vehicles in the main road, it is desirable not to display the left turn display time exceeding the preset left turn time (B-C section).

FIG. 3 (b) shows a signal presenting method when it is determined that the left turn vehicle and the pedestrian traffic button of the main road are not input at the first L / P check time (section A1-B). This indicates that the extended manifestation time is extended to the AC section (hereinafter referred to as omitting manifestation).

In detail, referring to the drawing, in the predetermined periodic signal system, the present time straight to the main road was during the AB section, but the left-turning vehicle exists as a result of checking the left-turning vehicle on the main road at the first L / P checking time (A1-B section). In addition, since the pedestrian button is not pressed, the present time straight to the main street is displayed from the AB section to the AC section.

That is, when there is no left turn vehicle on the main road, the driving time is extended to display the road until the end of the left turn display time.

Even in this case, if it is determined that the pedestrian traffic button 134 of the secondary road is pressed, the algorithm processing unit 110 displays the green signal of the pedestrian traffic of the secondary road.

FIG. 3 (c) shows a signal when there is a left turn vehicle of the main road at the first L / P check time (section A1 to B), but there is no waiting vehicle and when it is determined that the pedestrian passage button is not input. According to the present disclosure, a left turn signal of a driving lane is displayed at a left turn display time by a predetermined periodic drive, and a short turn left display time of a driveway is displayed because there is no waiting vehicle.

That is, in the periodic signal system, the left turn display time of the main road is set to "BC" section, but when there is no left turn waiting vehicle, the turn left display is terminated by the main road at the time of "B1" and the left turn display time is set as the default negative. A left turn is indicated as a negative road (hereinafter referred to as early termination).

In this case, according to the presence or absence of a left turn vehicle and the number of waiting cars, the left turn display time is omitted or terminated early.

Specifically, referring to the drawing of FIG. 3 (c), the present time when the left turn display time was originally the BC section, but because there was no waiting vehicle, the left turn was displayed by the B-B1 section, so the B1-C1 section was a predetermined default. A left turn is indicated as a negative turn during the same time as the CA section.

FIG. 3C illustrates that there is a left turn vehicle as a negative road.

Therefore, when the left turn display time is displayed as the preset negative, the left turn display time is pulled by the negative road (pulled from point A to C1), so that the straight display time is driven early.

In the same condition, when there is no left turn vehicle on the secondary road, the present time straight ahead of the main road is displayed by forwarding the left turn present time by the preset negative road.

Specifically, referring to FIG. 3 (c), the left side road manifest time was originally the C-A section, but since the left side road appearance was terminated at the point C1, the straight road manifestation was displayed early from the point C1.

In this case, it is determined whether the pedestrian passage button of the main road is input at the second L / P check time, and when the pedestrian passage button of the main road is input, the corresponding green signal is displayed at the left turn present time.

In this L / P check time, the time required to check the left-turning vehicle and the waiting vehicle while maintaining the signal display currently displayed is sufficient, so there is no particular limitation.

And, if the speed of the vehicle input from the speed detection means 130 in the dilemma before the end of the straight signal manifestation of the main road is detected as a vehicle of a predetermined speed or more, the algorithm processing unit 110 to extend the display of the straight direction to the main road to display. do.

The speed detection of this dilemma zone can lead to the safety of the intersection by minimizing the dilemma vehicles falling at the intersection passing dilemma at the end of the straight time.

As a result, in the present invention, the straight present time of the main road can be displayed early or extended in a predetermined periodic signal system, thereby maximizing the operation efficiency of the intersection.

Therefore, from the environment such as energy waste and sudden stop caused by frequent traffic delays, energy saving and environmental pollution can be reduced and vehicle traffic can be smoothed.

In particular, by identifying the traffic demand of the left turn and applying the response time, it is possible to minimize the loss time caused by the left turn signal on the road and the main road, and to prevent the traffic accidents at the intersection when operating the blinking signal, and to use the pedestrian traffic button. Even if omitted, pedestrians can safely cross the intersection.

Hereinafter, a three-way intersection traffic light control method of the present invention will be described with reference to FIGS. 4 to 7.

5 is a flowchart illustrating a signal control method of the present invention, FIG. 6 is a flowchart illustrating a signal control method according to a pedestrian traffic button, and FIG. 7 illustrates a signal control method according to a detected speed in a dilemma zone. It is a flowchart for doing so.

First, referring to FIG. 5, the algorithm processing unit 110 operates a predetermined periodic signal to allow the signal output unit 150 to control traffic lights at three intersections (S210).

First, while displaying a bidirectional straight signal as a driving led, the image detection means 122 and 124 receives the number of left turning vehicles and waiting vehicles on the main road and left turning vehicles and waiting vehicles on the secondary road (S211).

In step S212, it is determined whether the first L / P check time is reached, and the current display signal is maintained until the first L / P check time is reached. Check the number of (S213).

In the present invention, in step S211, the number of left-turn vehicles and waiting vehicles on the main road and left-turn vehicles and waiting vehicles on the secondary road is input from the image detecting means 122 and 124 at the present time when the driving direction goes straight. It goes without saying that it is possible to check whether there is a left turn vehicle in the main road and the number of waiting vehicles in the first L / P checking time in step S213.

The algorithm processing unit 110 controls the signal output unit 150 to display the left turn display by driving (S214) when it is determined that there is a left turning vehicle by driving based on the result analyzed in step S213 (S214).

At this time, it is determined whether there is a waiting vehicle (S216), and according to the presence or absence of the waiting vehicle, the left turn display time is early terminated early (S217).

In addition, if it is determined in step S214 that there is no left-turned vehicle by driving, the previous signal-leading straight signal-manifestation is continued (S218).

The algorithm processing unit 110 checks the left turn display time end time by the driving control so as to display the current duration of the previous signal up to the left turn display time by the predetermined drive (S219).

If it is determined in step S219 that the preset left turn display time has ended, the previous signal display is terminated (S220).

In step S217, if the waiting vehicle is small and is terminated early or the previous manifestation signal ending time is reached in step S220, it is determined whether the second L / P check time is reached (S221).

The second L / P check time is to determine whether the left turn vehicle on the secondary road, the number of waiting vehicles, and whether the pedestrian button has been pressed by the main road to omit the left turn display on the secondary road or prematurely terminate it.

If it is determined in step S221 that the second L / P checking time has arrived, the algorithm processing unit 110 determines whether the left vehicle is left and the number of waiting vehicles from the image detecting means 124 on the negative road (S222).

If it is determined in step S222 that there is a left-turning vehicle (S223), the left turn is displayed as the negative road (S224), and the left turn is displayed as the negative road until the end of the left turn display time (S225 to S228).

In this case, when the left turn indication is displayed in the secondary road, early termination may be possible depending on the presence and the amount of the waiting vehicle.

In addition, if it is determined in step S223 that there is no left turn vehicle on the negative road, the driving signal is displayed until the predetermined left turn display end time (S226 to S229).

The subsequent step is configured to repeat the process according to a predetermined periodic signal system.

Hereinafter, a signal control method according to input of a pedestrian traffic button will be described with reference to FIG. 6. FIG. 6 is a flowchart illustrating a signal control method according to a pedestrian traffic button, and it will be described that pedestrian traffic button is installed in a main road and a secondary road, respectively.

The algorithm processing unit 110 displays the periodic signal as described above, and determines whether the pedestrian passage button 142 of the main road is pressed (S230). Display the traffic green signal (S231).

That is, even if there is no left turn vehicle, the algorithm processing unit 110 does not omit the left turn manifestation when it is determined that the pedestrian traffic button 142 of the main road is pressed, and displays the pedestrian traffic green signal when the left turn present time of the main road arrives. By controlling the signal output unit 150 to allow pedestrians to pass through the intersection safely.

Thereafter, it is determined whether the pedestrian traffic button 144 is pressed on the secondary road (S232). If it is determined that the signal is pressed, the green signal of the pedestrian traffic is displayed on the secondary road at the preset left turn time.

Similarly, if the algorithm processing unit 110 determines that the pedestrian traffic button 144 of the sub-road is pressed even when there is no left-turning vehicle, the algorithm processing unit 110 does not omit the left-turning manifestation but displays the pedestrian traffic green signal when the left-turning time of the sub-road arrives. By controlling the signal output unit 150 to allow pedestrians to pass through the intersection safely.

After that, it is to be manifested by a periodic signal system (S234).

The pedestrian traffic button according to the present invention displays a green signal for pedestrian traffic at a predetermined left turn signal time when a button is input regardless of whether a vehicle is left turning in the corresponding lane, so that pedestrians can pass safely.

In addition, the signal control method according to the speed detection of the dilemma zone will be described with reference to the drawings.

7 is a flowchart illustrating a signal control method according to the speed detected in the dilemma zone. The algorithm processing unit 110 determines whether the vehicle is detected in the dilemma zone through the speed detection means 132 and 134 of FIG. 4. If the vehicle is detected (S240), it is determined whether the speed detected from the speed detecting means (132, 134) is equal to or greater than the preset speed (S241).

The preset speed refers to data set in a memory (not shown) of the algorithm processing unit 110 as a speed at which a vehicle passing through a dilemma zone inevitably falls into an intersection passing dilemma when a straight signal is terminated. .

If it is determined in step S241 that the vehicle passes through the dilemma zone at a predetermined speed or more, the algorithm processing unit 110 may display the driving time extension to be displayed a little longer so that the vehicle falling in the intersection passing dilemma may safely go straight to the intersection. To operate (S242).

Subsequently, it is displayed as a periodic signal system (S243).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

110: algorithm processing unit 120: vehicle detection means
122, 122a, 122b: image detecting means 124: loop detecting means
130,132,134: speed detection means 140,142,144: pedestrian passage button
150: signal output unit

Claims (16)

In the signal control device of three intersections,
Vehicle detection means for receiving vehicle detection data near the intersection of the main road and the secondary road;
The control signal to omit or terminate the left turn display early according to the presence or absence of the left turn vehicle and the number of waiting vehicles, the left turn vehicle and the number of the waiting vehicle from the vehicle detection data input from the vehicle detection means; Algorithm processing unit for outputting;
A signal output unit controlling a traffic light according to a control signal of the algorithm processing unit; And
And a speed detecting means for detecting a vehicle speed of the dilemma zone as a main road.
Here, the algorithm processing unit is to maintain the current straight appearance signal for a certain time when the speed of the vehicle detected by the speed detection means falls into the intersection passing dilemma when changing from the straight appearance signal of the main road to the next appearance signal. Signal control device of three intersections characterized in that.
delete delete delete delete delete delete delete The method of claim 1,
A pedestrian traffic button installed in a traffic lane of a main road or a secondary road;
To include more
And the algorithm processing unit controls to display the pedestrian traffic green signal for a predetermined time at the preset left turn time when it is determined that the pedestrian traffic button is input.
delete (a) controlling the algorithm processing unit to display a signal system of three intersections;
(b) determining, by the algorithm processing unit, whether or not there is a left turn vehicle and a waiting vehicle on the main road and a left turn vehicle and a number of waiting vehicles on a main road from a vehicle detecting means;
(c) the algorithm processor may be configured to omit or early terminate the control signal according to a result of determining whether there is a left turn vehicle on the main road, the number of waiting vehicles, the left turn vehicle on the negative road, and the number of waiting vehicles. Outputting;
(c-1) the speed detecting means detecting the vehicle speed of the dilemma zone by the leading; And
(d) controlling the traffic light according to the output signal of step (c);
It is configured to include,
According to the detected vehicle speed, the algorithm processing unit outputs the current manifestation signal for a predetermined time when the speed of the vehicle detected by the speed detecting means falls in the intersection passing dilemma when changing from the straight manifestation signal of the main road to the next manifestation signal. And a signal control method for a signal control device at a three-way intersection.
delete delete delete 12. The method of claim 11,
Receiving a pedestrian traffic button on the main road or a secondary road;
To include more
And if the algorithm processing unit determines that the pedestrian traffic button is input, display the pedestrian green signal at a preset left turn time.
delete

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