JPS63257900A - Traffic signal control - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for controlling traffic signals, that is, signals on expressways. They are installed at predetermined intervals, and a traffic light that can switch between "blue" and "red" is installed between the above fire detectors, and one traffic light similar to the above traffic light is installed in front of the tunnel. A plurality of markers Rk are provided at predetermined intervals in the same direction of arrival, and an indicator is provided to prevent fires from occurring due to vehicle accidents such as collisions in the tunnel.

If a fire detector is activated, the traffic light located between the fire detector and the tunnel entrance changes from "green" to "red".
In addition, the traffic light installed in front of the tunnel entrance will also switch from "green" to "red," and the above display will indicate that a fire has occurred in the tunnel, and the direction of arrival of the vehicle will be determined based on the tunnel population. The signs placed facing the tunnel entrance will be switched to gradually reduce the speed of vehicles traveling toward the tunnel entrance, and will be flashed together with the above-mentioned indicator. In addition, by changing the markings on the signs, vehicles traveling toward the tunnel entrance will be slowed down in stages and stopped at the traffic lights that are set up before the tunnel entrance. It is characterized by the following points.

[Conventional technology]

Traditionally, fire detectors have been installed inside tunnels, and when a fire detector is activated, a traffic light installed near the entrance of the tunnel is activated.
There is a device that switches from "blue" to "red" to stop a car running towards the tunnel entrance before the tunnel entrance.

[Problem that the invention seeks to solve]

In the conventional method, the traffic light suddenly changes from "green" to "red", which is extremely dangerous for cars traveling at speeds of about 1100 km/h and their drivers. This invention has been made to improve these problems.

[Means for solving problems]

In addition to installing multiple fire detectors at predetermined intervals in the tunnel, a traffic light is placed between the fire detectors, and the same traffic light is placed in front of the tunnel entrance. A plurality of variable signs are placed at predetermined intervals, and an indicator is installed near the sign furthest from the tunnel entrance, or closer to the direction the car is coming from, to notify drivers of the occurrence of a fire.

When a fire detector in the tunnel is activated, the above-mentioned traffic lights, signs, and indicators are controlled by the controller.

[Effect]

When the fire detector is activated, the controller will switch the traffic lights inside and outside the tunnel from "blue" to "red," and the above display will indicate that a fire has occurred inside the tunnel, and a sign will be posted. Speed limit signs were set up and flashed along with the above-mentioned indicators, which caused cars inside the tunnel to stop, and cars running towards the tunnel entrance to slow down in stages, and were placed in front of the tunnel entrance. Stop at the traffic light.

〔Example〕

In Figure 1, (1) is a motorway, (2; is a tunnel, (3a), (5b), (3c)
- is a fire detector that is installed in the tunnel (2+) and is sensitive to smoke or heat.Three detectors are shown here, but depending on the length of the tunnel, more detectors may be installed at predetermined intervals. Needless to say, (4) is a controller that is connected to the above-mentioned fire detector and controls the traffic lights, signs, and displays described later, and is a functional element (9) equipped with calculation and control functions such as a microcomputer. It is mainly composed of.

FS is a flashing signal (flicker signal) generation unit in the controller (4), which causes the signs and indicators described later to flash.The signs are displayed after the fire detector detects a fire. After that, it flashes with a flashing signal. In addition, the display displays a message to notify the driver of the occurrence of a fire, as shown in Figure 5, and then flashes to alert the driver. (5a) is the distance t1 from the entrance (6) of the tunnel (2)
The first variable sign installed at a position 62 mm away from traffic light (5) in the direction of arrival of the vehicle displays the speed limit in a variable manner. . (8) is a second variable sign installed at a position t3 away from the sign (7) in the direction of arrival of the vehicle.

Note that the relationship between t and t2 = t3 is limited to tl<t
2〈t3. Alternatively, t and t2 (Determined by various road conditions such as straight roads, curves, or crosswind caution areas such as the relationship shown in 13). This is a display placed near the direction of arrival of the fire, and is used to notify the driver in the event of a fire.The display should be easily visible both day and night, such as a dot type electric display. .

(9) is a car traveling in the direction of the arrow, (sb), (
5c), (sa)... are traffic lights in the tunnel, each of which is located between the fire detectors and is controlled by the controller (41).

If there is no abnormality in this configuration, the traffic light (sa
), (sb)... are always set in "blue", and signs (7) and (8) are marked as the maximum speed of the motorway (for example, 100 Km/h).

In such a state, if a fire occurs in the tunnel, one of the fire detectors (5a), (3b), etc. will operate and give a detection signal to the controller (4).

Thereby, the controller (4) outputs a control signal i11.

When the fire detector detected the signal, the traffic light at the entrance of the tunnel and the traffic light (5a) were switched from "green" to "red", and the first. The indications of the second signs (71, +81) are changed. Also, the display as shown in FIG. 5 is displayed on the display (A).

In other words, if the fire detector (3c) now detects a signal of Kanayama, the traffic lights (sd), (5c), and (sb) located closer to the entrance of the tunnel will change from "blue" to "
becomes red.

Also, if the fire detector (5b) is activated, the traffic light (
5c), (sb) becomes "red", and among the vehicles traveling in the tunnel, those on the tunnel entrance side from the fire detector are stopped. At the same time, a traffic light (5a
) is also set to "red". Then, the display (■) shows a display as shown in FIG. Furthermore, the speed sign at sign # (7) should be changed to 3, for example.
0 Km / h, all speed signs of signs (8) e.g. 6
Set it to 0km/h.

More specifically, the speed of the vehicle is reduced in stages before the signal 'IA (5a).

It goes without saying that in order to do this, the distance t2)'5 must take into account the braking distance and be sufficient to cope with the speed drop.

Next, an example of the configuration of the marker f71 +81 will be explained using FIGS. 2, 3, and 4.

Figure 2 shows an example of the structure of a sign, where +lυ is the dot α3 (transparent or opaque), which is the minimum unit of display characters, etc.
The front plate is made of opaque plate glass or plastic except for t.α3 is a round rod-shaped light guide formed by one or more pieces to form a single flat plate, and is made of transparent plastic and has flexibility. and corresponds to each transparent or translucent dot σ2. Note that (13) is the minimum unit of a character symbol or figure (picture) to be described later.One end of the light guide is fixed to the dot a'a of the front panel 0υ, and the other end is the light generating part. Located in device I.

That is, the light generating device α7 is composed of a light source (for example, a logen lamp') Qj, and a reflector (REFLECTOR) <IG that totally reflects the light emitted from the light source α9, and other than the light guide 03, The end is the reflector above
located at the focal point.

Therefore, when the light source θ9 is turned on by the power from the power source aη, the light enters from the other end of the light guide α3 and reaches one end.

FIG. 3 shows an example of a case where necessary markings are made based on the configuration shown in FIG. 2, and in reality, speed, that is, numbers are displayed.

Fig. 4 shows a sign configured as shown in Figs. 2 and 3 with a means for changing the sign added, αυ is a front plate, (15-1) to (13-n) are light guides,
Q41 is a light generator, aS is a light source, αQ is a reflector, (
lη is a power supply, (1a-1) to (18-n) are optical switches, and the respective light guides (13-1) to (13-n
) are provided in the middle and are selectively controlled individually by a selection circuit α1. (4) is a controller, and this control (111
The selection circuit (Il) selectively controls the optical switch according to a signal generated by the fire detection from the device (4).

Further, a flicker signal generated from the blinking signal generating section FS of the controller (41) is applied to the power source f171 and the display device (2).

ON/OFF control.

Therefore, if the controller (4) outputs the side 11 signal to change the speed indicator in consideration of the speed of the oncoming car when a fire is detected, the selection circuit (1'J indicates all the selections of the light switch). Action 2 A lower speed sign is displayed than the normal speed sign.Therefore, the sign (71 (s+) indicates the speed for deceleration taking into account the braking distance in order to stop an oncoming car before the traffic light (5a). can do.

Additionally, all signs and indicator 1 (a) will flash to alert drivers.

〔Effect of the invention〕

This invention is as described above, so if a fire breaks out in a tunnel, a car traveling in the tunnel will stop in front of the activated fire detector, and a car driving toward the entrance of the tunnel will stop. The vehicle can be slowed down step by step according to the instructions on the display and signs, and then stopped just before the tunnel entrance.

This can prevent the accident from spreading.

Incidentally, in the above-mentioned embodiment, the light guide 1 is a round rod-shaped light guide made of transparent plastic, but it goes without saying that this may be replaced with an optical fiber.

Additionally, turning red lights and flickering red lights have been added to traffic lights in tunnels to alert drivers when the traffic light changes from green to red. Good too.

By the way, as in the embodiment, the light guide and the light source.

Signs that combine a reflector consume less power than conventional signs that use a light source and one display mask (representing the entire shape of displayed characters, etc.), and can be used even when the light source is not energized. It eliminates the illusory image that tends to occur (a phenomenon in which the light source in conventional signs appears to be lit due to the sunlight reflected on the display mask surface even though it is not lit under bright sunlight). This is an extremely easy-to-see sign for people like me.

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining the entire signal control method according to the present invention, Figs. 2 to 4 are diagrams showing an example of a sign used in the invention, and Fig. 5 is a diagram showing an example of a display on a display. can be,(
1) is a road, and (2) is a tunnel. (3a), (5b), (3c)... are fire detectors, and (4) is a controller. (5a), (sb), (5c) +++ is a traffic light, (6) is a tunnel entrance, +7181 is a sign,
(9) is the car, αO is the control signal, αυ is the front plate, Q2 is the driver), Q31 is the light guide, and α7 is the light generator. Q9 is a light source, tte is a reflector, αη is a power supply, α barrel is a light switch, Q9 is a selection circuit, ■ is a display, and FS is a flashing signal generator. Note that in FIG. 1, the same or corresponding parts are designated by the same reference numerals.

Claims (2)

[Claims] (1) Multiple fire detectors are installed at predetermined intervals in the tunnel of the motorway, and there are "
In addition to installing a traffic light that can switch between "green" and "red," a similar traffic light will also be installed in front of the tunnel entrance, and the sign can be switched in the direction in which the vehicle is coming from at a predetermined distance from the traffic light. Multiple signs are placed at predetermined intervals, and if a fire occurs in the tunnel near the sign placed farthest from the tunnel entrance, or closer to the direction of the vehicle coming than the sign, An indicator will be installed to notify the driver, and if any one or more of the above fire detectors is activated in response to smoke or heat, a traffic light will be installed on the entrance side of the fire detector. The signal No. 3 installed in front of the tunnel entrance will be switched from "blue" to "red" and the above display will indicate that a fire has broken out in the tunnel, and the display located farthest from the tunnel entrance will be displayed. Change the display of the sign to a speed limit lower than the maximum speed of the motorway in question, and also change the display of other signs located between this sign and the traffic light located in front of the tunnel entrance to the farthest point from the tunnel entrance. By switching the speed limit to a lower speed limit than the posted sign, vehicles traveling in the tunnel are stopped, and the speed of vehicles traveling toward the tunnel entrance is gradually reduced. A traffic signal control method characterized in that the traffic signal is stopped at a traffic light installed in front of an entrance. (2) After all the signs placed in the direction from the entrance of the tunnel to the direction of traffic were changed to the speed limit so that cars could stop before the traffic lights, the above indicators were made to flash again after a fire broke out. A traffic signal control method according to claim (1), characterized in that: