KR100913895B1 - Signal change prediction type traffic light apparatus and method thereof - Google Patents

Abstract

The present invention provides a signal change predictive traffic light apparatus, comprising: a main traffic light displaying a traffic signal;

An auxiliary signal light having a shape similar to that of the main signal light having a plurality of indicator lights separately provided from the main signal light; A memory unit for storing command values for blinking respective indicator lights of the main signal lamp and the auxiliary signal lamp at predetermined time intervals; And a control unit for controlling the main signal lamp and the auxiliary signal lamp to blink at predetermined time intervals according to a command value stored in the memory unit. The control unit may include the auxiliary signal when the display signal of the main signal lamp is lit with a green signal. The plurality of indicator lights of the traffic lights are all lit in the same green color, and the green signals of the plurality of lights of the auxiliary lights lit in the same color are gradually turned on to prevent the entrance of the intersection on the road for a predetermined time before the driving signal of the main traffic light is changed. When the main signal is lighted with a yellow signal, the plurality of indicator lights of the auxiliary signal light are all lit with a yellow signal, and the main signal light is lit with a red signal. The plurality of indicators of the auxiliary traffic lights are all the same red To control such that such features.

This configuration allows the driver to anticipate signal changes, thus avoiding energy consumption and accident risk due to sudden stops.

Signal change prediction, same color lighting, yellow light sequentially

Description

Signal change prediction type traffic light apparatus and method thereof

The present invention relates to a signal change prediction type traffic light device, and more particularly, in showing the signal state of a traffic light installed on each road, the driver can estimate the remaining time of the green signal as the driving signal and the expected time to light the yellow signal as the stop preliminary signal. The present invention relates to a signal change predictive traffic light apparatus and a display method thereof, which predict a vehicle in advance and determine whether the vehicle is stopped.

 In general, traffic lights are installed at intersections or pedestrian crossings to instruct vehicles and pedestrians to move smoothly. The traffic lights are red, stop light yellow light and green light straight light. It consists of an arrow or the like that indicates.

     Conventional traffic lights as described above are usually mounted or suspended in a separately installed pillar, and is configured by mounting a white light lamp on the inside of the main body of a predetermined shape and a red, yellow and green glass cover on its front surface. When the lamp of the traffic light configured as described above is turned on according to the output signal of the control box controlling the traffic control center or the local traffic light, the lamp light is emitted through the glass cover to display the straight, stop and standby signals.

     However, the conventional traffic light has a problem that may cause a traffic accident as the driver does not inform the driver of the remaining time until the signal is switched. That is, the driver who accelerates the vehicle to cross the intersection according to the straight signal causes the vehicle to stop suddenly when the signal of the traffic light is switched to the standby signal, which may cause a traffic accident such as a collision accident.

    In addition, not only the risk of accidents due to sudden stops, but also excessive energy consumption due to this problem was caused.

    1 shows a remaining time indicator of a pedestrian traffic light in the conventional installation operation.

    The pedestrian traffic light remaining indicator shown in FIG. 1 serves as an auxiliary light in traffic-related traffic lights as a display device that allows a pedestrian to pass through a crosswalk in peace.

      In addition, Korean Patent Laid-Open Publication No. 2000-0018157 shows that there is a remaining time display device of a traffic light that displays a remaining time at a traffic light or a crosswalk signal at an intersection to prevent traffic accidents at the intersection. Able to know.

     However, these conventional techniques are to display the remaining time of the green to the pedestrian, not the driver, and when the green light comes in, the triangle-shaped LED light is gradually turned off in conjunction with the green light.

     In addition, the prior art Republic of Korea Utility Model Publication (20-0264885), as shown in Figure 2, in addition to the main signal light 201, the number 202, flashing light 203 to inform the remaining flashing time of the driver signal There is a traffic light with a signaling aid.

     The auxiliary traffic light is composed of 4 green lights, 3 yellow lights, 4 amber lights, 11 flashing lights, and a number lights that indicate the blinking time of the signal numerically, while the flashing lights are initially green, medium yellow, and red late. It is turned off in turn.

    The flashing time is indicated by the number, and the 11 flashing lights are used to indicate the change of signal sequentially in green for the first 4 lights, yellow for the middle 3 lights, and red for the last 4 lights.

     However, this method is likely to cause confusion for the driver. The driver should look at the signal at the main traffic light, look at the number of assistive devices, and at the same time, see the signal change on the flashing light.

     Rather, this approach makes it difficult for the driver to distinguish the signal, which incurs the risk of causing an accident.

    In addition, the flashing light is divided into green, yellow, and red to indicate the change in the initial, middle, and end of the signal, which makes it difficult to know the remaining time of the stop signal. There is no way to know the remaining time by changing the blinking lights. That is, it is difficult to measure the remaining time of the green signal because the green blinking light among the 11 blinking lights is a part, and one of them is turned off, so the driver cannot know how many of the blinking lights are off.

    This approach is no different from the prior art with numeral lights indicating the remaining time, but rather the flashing lights may only cause confusion in the driver's driving.

The present invention is to solve the problems of the prior art, it is possible to indicate the signal change through a separate auxiliary signal light, but the remaining time of the green signal while allowing the remaining time of the yellow signal, which is a preliminary stop signal before changing the red signal A traffic light device for predicting even time.

In order to achieve the above object, the present invention provides a signal change prediction type traffic light device,

A main traffic light indicating a traffic signal; An auxiliary signal light having a shape similar to that of the main signal light having a plurality of indicator lights separately provided from the main signal light; A memory unit for storing command values for blinking respective indicator lights of the main signal lamp and the auxiliary signal lamp at predetermined time intervals; And a control unit for controlling the main signal lamp and the auxiliary signal lamp to blink at predetermined time intervals according to a command value stored in the memory unit, wherein the control unit turns on a display signal of the main signal lamp with a green signal or a green and left turn signal. In this case, the plurality of indicator lights of the auxiliary traffic lights are all lit in the same green color, and the plurality of auxiliary traffic lights lit in the same color to prevent the vehicle from entering an intersection on the road before a predetermined time before the driving signal of the main signal lights is changed. As the green signal of the two indicators flashes gradually, the yellow signal is sequentially turned on as a yellow signal, and when the main signal light is turned on as a yellow signal, a plurality of indicator lights of the auxiliary signal lamps are all turned on as yellow signals accordingly. When the main traffic light is lit with a red signal, Several indicator is characterized in that the control such that all light in the same red color.

In addition, the present invention is a signal change prediction type traffic light device, characterized in that the indicator of the main signal is circular and the indicator of the auxiliary signal is oval.

In addition, the present invention is a signal change prediction type traffic light device, characterized in that the indicator light of the auxiliary signal light is composed of five.

In addition, the present invention is a method for controlling the display of the main traffic light indicating a traffic signal and the auxiliary signal light having a shape similar to the main traffic light having a plurality of indicators separately from the main traffic light, wherein the display signal of the main traffic light is a green signal or When the green signal and the left turn signal are turned on, the plurality of indicator lights of the auxiliary signal lamp are all lit in the same green color; In order to prevent the vehicle from entering the intersection on the road a predetermined time before the driving signal of the main traffic light is changed, the green signal of the plurality of indicator lights of the auxiliary traffic lights that are lit with the same color gradually blinks, and the yellow signal is sequentially turned on. Turning on; When the main signal light turns on a yellow signal, all of the plurality of indicator lights of the auxiliary signal light turns on a yellow signal accordingly; When the main signal light is turned on with a red signal, the plurality of indicators of the auxiliary signal lamps may include lighting all of the same red color.

The present invention as described above to inform the driver to predict the change of the yellow signal has the effect of preventing the risk of traffic accidents.

In addition, it is possible to prevent a sudden stop frequently occurs when the signal is changed by not predicting the change of the signal in advance, thereby preventing unnecessary fuel consumption of the vehicle due to the sudden stop.

In addition, it is possible to clearly recognize the change in the remaining time of the driving signal and the change of the yellow signal, which is a preliminary stop signal, in advance, as well as the effect of installing a plurality of main signals, without displaying specific numbers through the auxiliary signals. There is.

First, the concept of the present invention will be described.

The traffic light indicator is composed of red traffic light which is a vehicle stop signal, yellow traffic light which is a preliminary stop signal, and green traffic light which is a left turn and straight signal. Since there is no device to know the estimated time when a signal is changed, it occupies most of traffic accidents. Accidents at crossroads and crosswalks were caused by excessive force or braking due to the vehicle's inability to respond immediately because the driver had no predicted change time when the driver changed from a driving signal to a stop signal at the intersection or crosswalk.

This requires a stopping distance for the driving vehicle to stop.

The normal stopping distance is the distance between the princess distance (the distance the vehicle has progressed at the moment the driver senses the danger ahead and presses the brake pedal) and the braking distance (the required distance from stepping on the brake pedal to a complete stop). In addition, if the driver's average princess time is about 0.6 to 1 second, the required stopping distance is estimated to be about 50m to 60m when traveling from 70km to 80km per hour, the permissible speed of vehicles on the general road.

In the case of 70km to 80km per hour, the vehicle runs at a distance of 19m to 22m per second, and when the driver approaches the intersection, it is impossible to accurately predict when the driving signal will change from the driving signal to the stop signal. As you approach, you need to be aware of the signal and think about whether you should continue or stop, which can lead to an accident.

This section starts at about 100m behind the intersection and is called the “dilemma section”. In conclusion, the problem of intersection traffic accident is that the driver cannot predict the change time of the signal accurately with the current signal system. Therefore, many studies have been conducted to improve the traffic light system or devise the signal device.

For example, in order to predict a signal change time, a time display device such as a traffic light is used not only in Korea (January 20, 2006, Republic of Korea Patent Publication 10-0543238) but also in a foreign country. Although there is an example of operating a timer that displays the time (Shanghai, Shanghai, China), the device is not only difficult to identify until the driver approaches the number indicating the remaining time while driving, but also looks at the display. As it is accompanied by the risk of an accident, it is not widely distributed due to its practicality.

 In order to reduce pedestrian and vehicle traffic accidents at frequent intersections, the government is also planning to improve the way the intersection lights operate from the American style where the lights are across the intersection to the European style where the lights are just before the intersection. The Ministry of Construction explained that even if the position of the traffic light is only slightly advanced, the accident can be drastically reduced because there is the time and space to determine the stopping of the vehicle at a distance farther away.

As an example of this plan, Jeonju City introduced the European style since 2001, which had a significant effect on reducing the number of traffic accidents. Although the signal system is installed in Korea, it is still necessary to research and review how much effect the movement of the entire traffic light support to the European style by enormous budget is required.

Because the European style is the European style and the American style is the American style, the European style has the disadvantage that the efficiency of the road is reduced, such as having to retreat back to the driver's stop line for the driver's eyes by placing the traffic light just before entering the intersection.

When moving the traffic light in the European style, the moving distance is about 15m to 25m ahead. Unlike the structures on the plain, the traffic light is suspended in the air, so there is no relative object in the air to prepare for the perspective. You can hardly perceive the distance at 15m to 25m distance without approaching 30m ahead. Moreover, the effect is even more halved during the operation at night, dawn, or rain, where the visibility is bad and the probability of traffic accident is high. have.

Nevertheless, to adopt the European style, in order to stop the vehicle when driving at 80km, the stopping distance of about 60m is required, which is 20m of Gongju distance and 40m of braking distance, and 50m to 60m behind the intersection when the signal changes, whether American or European. There is no difficulty in stopping the vehicle, but since the European style can identify the distance as far as the traffic light is, unlike the American style, it is effective to reduce the stopping distance of the vehicle by reducing the princess time that the driver reacts to stopping. will be.

In conclusion, the above measures are intended to improve the current signal system when the driver cannot predict the signal change time accurately when approaching the intersection. If there is an aid that can be perceived comfortably without any confusion and burden, and without any objection, and can determine in advance whether or not the vehicle is stopped during an approaching intersection, the road in any situation is a straight line that runs at high speed. In particular, at intersections and crosswalks, including turning points on roads, especially in areas of accidents, it will result in drastic reductions in traffic accidents than any other method, such as European signage.

Features of the present invention according to the above point is as follows.

1. For example, in the configuration disclosed in Republic of Korea Patent Publication No. 10-0389452, the part which the driver who is already flickering at the time of night or dawn driving which is difficult to identify in front is not recognized at all, and is only turned on. In order to solve the problem that only the light portion of the signal lamp is detected, the total ratio of the flashing portion and the remaining portion cannot be known and the time of the remaining portion cannot be understood. The method of displaying the remaining signal by giving a color is provided by a method in which a yellow signal as a stop signal erodes the green signal as a driving signal.

In other words, it adopts a method in which the yellow signal of the auxiliary signal encroaches the green signal in order so that the estimated time of the yellow signal change and the remaining time of the green signal of the main signal lamp can be accurately recognized, and the driver is approaching the intersection. Since the time interval between the signals and the mileage can be estimated relatively, it is possible to determine whether the vehicle is stopped even if the distance behind the intersection is not known accurately.

2. Since a plurality of indicator lights are configured in the auxiliary signal lamp, unlike the remaining time indicator for a walking pedestrian, an auxiliary signal lamp for a driver of a vehicle traveling at a high speed should be easily recognized even at a long distance. It is better to be as large as possible, and if the time required from the point of intersection 100m to the intersection is about 5 to 8 seconds (the remaining time of 30 seconds or 20 seconds is 400m or 600m behind the intersection if the vehicle speed is 70 to 80km). It is meaningless as it is a point.), The remaining time of signal change is recognized as an auxiliary signal for 5 to 7.5 seconds, and the time interval between the yellow signal of the main signal and the auxiliary signal light is changed to red signal is 3 seconds, so the dilemma of intersection It is possible to completely extinguish the section, so it can be seen that the most appropriate number of auxiliary signals is 5, and the main signals, etc. Since the number of is 4, it can be distinguished from the main traffic light.

3. The shape of the auxiliary signal light is oval, that is, the shape of the auxiliary signal light is oval, so that the shape of the light is similar to the shape of the oval, and the shape of the light is similar to that of the main signal light. This allows the auxiliary traffic lights themselves to have the same effect as having multiple primary traffic lights, providing drivers with clearer signal indications, which are greater than when driving at night or in fog, especially when it is raining at low visibility. It will work.

4. Since the signal system of the auxiliary signal lamp is the same as the main signal, the signal system of the auxiliary signal lamp is changed to the same system as the red signal, the yellow signal and the green signal of the main signal. It is also designed to be able to serve as a main signal even if the auxiliary signal itself is used.

That is, it can know from the operation example demonstrated below.

Although there may be some errors depending on the actual road situation or the flow of the vehicle, assuming that an auxiliary traffic light is installed, for example, when the vehicle is approaching an intersection, the driver may determine whether to stop the vehicle, that is, change the signal change time. If it can be predicted in advance, only the braking distance is required because the princess distance is not required among the stopping distances for stopping the vehicle. According to the Korean security standards for vehicle braking distances, cars with a maximum speed of 80 km / h must stop within 50m to 22m at an initial speed in the riding capacity (maximum load), and cars with a speed of 80km / h should stop within a speed of 35km to 14m. Since the braking distance is 60m per hour, the braking distance is about 30m, the speed of 70km is 35m, the speed of 80km is 40m, and the braking distance required for driving at 80km, the maximum allowable speed of a general road, is 3 seconds. You can stop within a while.

That is, the vehicle may stop within the mileage shown in the table below. In the following operation example, the signal interval of the auxiliary signal lamp is set to 1 second, and if the time interval is reduced to 1.5 seconds, the traveling distance by time becomes longer.

<Table> Travel Distance by Vehicle Speed

1 sec 2 sec 3 sec 4 sec 5 sec 6 sec 7 sec 60 km 17 m 33m 50 m 67m 83 m 100 m 117 m 70 km 19m 39 m 58 m 78m 97 m 117m 136 m 80 km 22 m 44m 67m 89 m 111m 133 m 156m

<Example>

In case of five indicators of auxiliary traffic lights when driving in front of the intersection, if all five signals are green, there is more than 5 seconds of remaining time until the yellow signal, which is a preliminary stop signal such as the main signal, is left within 80m of the dilemma section. You may pass through an intersection when driving. When the green signal of the auxiliary light turns into the yellow signal for the first time, it is 4 seconds before the change of the yellow light of the main signal.

1. When driving at 60km / h and passing 60m to 70m behind the intersection, stop at the intersection when the green signal of No.1 light turns yellow.

2. When driving at 70km / h and passing 70m to 80m behind the intersection, stop at the intersection when the green signal of No. 1 traffic light turns yellow.

3. When driving at 80km / h and passing 80m to 90m behind the intersection, if the green signal of No. 1 traffic light turns yellow, stop at the intersection.

4. When driving at 60km / h and passing through 45m to 50m behind the intersection, stop at the intersection when the first and second auxiliary lights turn yellow.

5. When driving at 70km / h and passing 55m to 60m behind the intersection, stop at the intersection when the auxiliary traffic lights 1 and 2 turn yellow.

6. When driving at 70km / h, passing the 35m to 40m behind the intersection, stop at the intersection if the auxiliary traffic lights 1 and 2 turn to yellow.

7. When driving at 80km / h and passing through the point 40m to 45m behind the intersection, stop at the intersection when the auxiliary traffic lights 1 and 2 turn to yellow signal.

8. When driving at 80km / h and passing 20m to 25m behind the intersection, stop at the intersection when the auxiliary traffic lights 1 and 2, 3 and 4 turn yellow.

Remaining time recognition traffic light according to the present invention is as follows.

As described above, the auxiliary traffic light of the present invention is designed to perform the same role as the signal system of the main traffic light by itself, and this principle is applied to the main traffic light device. In the case of two-lane roads, two roads are installed, and three or more traffic lights are installed in the three-lane road, which allows a driver to easily recognize signals even if the driver is not looking at a single traffic light. In addition, it is designed to make it easy to distinguish it from other lights in the city at night or at dawn. If the applied main traffic light is introduced, it has the same effect as four or more traffic lights installed with two traffic lights. The present invention not only becomes a clear and accurate traffic signal indicator, Auxiliary traffic lights can also perform perfectly at the same time.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the signal change prediction type traffic light apparatus according to the present invention and a method for controlling the display of the main signal to display traffic signals and the auxiliary signal having a plurality of indicators separately.

3 is a view illustrating a signal change predictive traffic light apparatus according to the present invention, and FIGS. 4 to 8 are views illustrating a process of changing an indicator when the display signal is a green signal and a left turn signal.

As shown in Fig. 3, the signal change predictive traffic light apparatus according to the present invention comprises: a main traffic light 301 for displaying a traffic signal; An auxiliary signal light 302 having a plurality of indicator lights separately provided from the main signal light; A memory unit 303 storing command values for blinking respective indicator lights of the main traffic light and the auxiliary traffic light at predetermined time intervals; And a control unit 304 controlling the main signal lamp and the auxiliary signal lamp to blink at predetermined time intervals according to the command value stored in the memory unit.

The main traffic light 301 is a conventional existing traffic light to display a red, yellow, green, left turn signal.

The auxiliary traffic light 302 is installed at a predetermined position of the main traffic light and displays the remaining time of the driving signal in association with the main traffic light. It is desirable that the number of indicator lights of the auxiliary traffic lights be five so that the dilemma section of the intersection can be completely digested and differentiated from the main traffic lights.

The memory unit 303 stores a command value for controlling the traffic light in the control unit 304. Command values for turning on the display signal by a yellow signal at predetermined time intervals are stored in the controller.

The controller 304 controls the signal change of the indicator. That is, as shown in Figs. 4 to 8, when the display signal is lit by the green signal or the green signal and the left turn signal, the plurality of indicators of the auxiliary signal lamps are all lit in the same green color, In order to prevent the vehicle from entering the intersection on the road a predetermined time before the driving signal is changed, the green signals of the plurality of indicator lights of the auxiliary lights that are lit with the same color are gradually blinked so as to be sequentially turned on as yellow signals. When the main signal is lit with a yellow signal, a plurality of indicators of the auxiliary signal lamp are all lit with a yellow signal, and when the main signal light is lit with a red signal, the plurality of indicators of the auxiliary signal lamp are all lit with the same red color. To control.

9 is a diagram illustrating a display of a traffic light apparatus when the display signal is a green signal. 4 and 8 are identical in configuration to those shown in FIGS. 4 to 8, and similarly to FIG. 4, the process of gradually changing the display signal of the auxiliary signal lamp to the yellow signal is the same. However, only the main signal is lit. will be.

As described above, under the control of the control unit, a plurality of indicator lights of the auxiliary signal lamp are all lit with the same color, and then gradually change to a yellow signal according to a predetermined time, thereby enabling the driver to predict a signal change.

 The shape of the signal indicator is that the indicator of the main signal is usually circular, but the indicator of the auxiliary signal is similar to the shape of the indicator of the main signal, but is formed somewhat differently, for example, to form an oval shape to distinguish it from the main signal. Can have the same effect as that provided with a plurality of main traffic lights.

Fig. 10 is a method for controlling the display of a main traffic light displaying a traffic signal and an auxiliary traffic light having a plurality of indicators separately from the main traffic light according to the present invention, wherein the display signal of the main traffic light is a green signal or a green signal and a left turn signal. When the light is turned on, the plurality of indicators of the auxiliary signal lamp are all lit with the same green color. (S110) When the green signal is inputted to the main signal lamp, all the indicator lights of the auxiliary signal lamp are lit with the same green color so as to predict a signal change. .

Next, in order to prevent the vehicle from entering the intersection on the road a predetermined time before the driving signal of the main traffic light is changed, the green signal of the plurality of indicator lights of the auxiliary traffic lights that are lit with the same color gradually blinks yellow. The signal is sequentially turned on. (S120) The indicators of the auxiliary signal lamps, which came into the green signal all the time before the green signal of the main signal lamp is changed to the red signal, turn into yellow one by one. The change in the auxiliary light not only tells you how much time is left for the green signal, but more importantly allows the driver to predict the changeover time to the yellow signal, the stop reserve signal.

Next, when the main signal light is turned on with a yellow signal, all the indicators of the auxiliary signal light are turned on by yellow signals. (S130) When the display signal of the main signal lamp is turned on by a yellow signal, the indicator light of the auxiliary signal lamp gradually turns to a yellow signal. After changing to, the yellow signal turns on in accordance with the lighting of the yellow signal of the main signal lamp. As the green signal is changed to the yellow signal through the auxiliary traffic light, the driver can predict the change to the yellow signal, so that when the green signals are all changed to the yellow signal, the driver can smoothly stop without sudden stop.

Next, when the main signal light is turned on with a red signal, a plurality of indicators of the auxiliary signal light are all turned on in the same red color. (S140) In addition to the main signal light, all the indicator lights of the auxiliary signal light are turned on by the same color. Not only can the green or yellow signal be recognized very clearly, but the signals that are initially lit all the same color gradually change before a certain time before the driving signal is changed, so that the remaining time of the signal can be known.

The present invention controls the signal in a manner that gradually turns yellow after the auxiliary lights are all lit in the same color in conjunction with the signal of the main traffic light, so that the driver is the remaining time of the green, left turn signal, and more decisively change to the yellow signal It is a technology related to traffic lights that can be clearly predicted by the driver to prevent accidents caused by sudden stops and waste of energy due to sudden stops.

    1 is a view showing a conventional pedestrian remaining time indicator.

     2 is a view showing a conventional driver remaining time indicator.

     3 is a diagram illustrating a configuration of a signal change prediction type traffic light device according to the present invention.

    4 to 8 are views illustrating a signal change process of the auxiliary traffic light device when the main signal light according to the present invention lights up the green signal and the left turn signal.

    9 is a view showing a scene of a signal change of the auxiliary traffic light device when the main signal light according to the present invention is lit green signal.

    10 is a diagram illustrating a flowchart relating to a signal display control method of a traffic light apparatus according to the present invention.

    <Explanation of the code | symbol about the main structure of drawing>

     301: primary traffic light 302: secondary traffic light

     303: memory unit 304: control unit

Claims (4)

Signal change prediction type traffic light device, A main traffic light indicating a traffic signal; An auxiliary signal light having a shape similar to that of the main signal light having a plurality of indicator lights separately provided from the main signal light; A memory unit for storing command values for blinking respective indicator lights of the main signal lamp and the auxiliary signal lamp at predetermined time intervals; And a controller configured to control the main signal lamp and the auxiliary signal lamp to blink at predetermined time intervals according to a command value stored in the memory unit. When the display signal of the main signal light is turned on by a green signal or a green signal and a left turn signal, the control unit turns on a plurality of indicators of the auxiliary signal light in the same green color, and a predetermined time before the driving signal of the main signal light is changed. In order to prevent the entrance of the intersection on the road, the green signals of the plurality of indicator lights of the auxiliary traffic lights that are lit with the same color are gradually blinked so as to be sequentially turned on with a yellow signal, When the main signal is lit with a yellow signal, a plurality of indicators of the auxiliary signal lamp are all lit with a yellow signal, and when the main signal is lit with a red signal, the plurality of indicators of the auxiliary signal lamp are all lit with the same red color. Signal change prediction type traffic light device, characterized in that.  2. The signal change predictive traffic light apparatus according to claim 1, wherein the indicator of the primary traffic light is circular and the indicator of the auxiliary traffic light is elliptical. The signal change prediction type traffic light apparatus according to claim 1, wherein the indicator light of the auxiliary traffic light is configured as five. delete

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