JPS63178398A - Control of traffic signal - 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. Installed at predetermined intervals, there will be traffic lights between the fire detectors that can switch between red and red, and a traffic light similar to the one above will be installed in front of the tunnel entrance. Multiple signs are placed at predetermined intervals in the direction.

If a fire occurs in a tunnel due to a vehicle accident such as a collision and a fire detector is activated, the traffic light located between the fire detector and the tunnel entrance will be switched from "green" to "red" and the traffic light located between the fire detector and the tunnel entrance will be switched from "green" to "red". The traffic lights installed in front of the tunnel will also change from "green" to "red," and the signs placed facing the direction of vehicles coming from the tunnel entrance will be changed to indicate the direction of vehicles traveling toward the tunnel entrance. Vehicles in the tunnel are stopped by traffic lights, and vehicles traveling towards the tunnel entrance are stopped by changing the signage to reduce their speed in stages. It is characterized by the fact that it slows down and stops at a traffic light just before the tunnel entrance.

[Conventional technology] Traditionally, a fire detector has been installed inside a tunnel, and when the fire detector is activated, the traffic light installed near the tunnel entrance is switched from "clear" to "red" and the driver runs toward the tunnel entrance. There is one that makes incoming cars stop in front of the tunnel entrance.

[Problem that the invention seeks to solve]

In the conventional method, the traffic light suddenly changes from green to green, which is extremely dangerous for cars traveling at speeds of about 100 K+n/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, and from this traffic light, traffic lights are placed in the direction in which cars are coming. A plurality of variable signs are arranged at predetermined intervals, and when a fire detector inside the tunnel is activated, the above-mentioned traffic lights and signs are controlled by the action of the controller.

[Effect]

When the fire detector is activated, the controller will switch the traffic lights inside and outside the tunnel from "green" to "red," and speed limit signs will be posted and flashing.

As a result, cars in the tunnel are stopped, and cars running toward the tunnel entrance are slowed down in stages and stopped at a traffic light installed in front of the tunnel entrance.

〔Example〕

In Figure 1, (11 is a motorway, C2) is a tunnel, and (3a), (3b), (3c)... are fire detectors installed inside the tunnel (21) that are sensitive to smoke or heat. (3) are shown here, but it goes without saying that more sensors may be installed at predetermined intervals depending on the length of the tunnel. (4) is connected to the fire detector above, and will be described later. It is a controller that controls traffic lights and signs, and is mainly composed of functional elements equipped with calculation and control functions, such as a microcomputer. This is a system that flashes a sign, which will be described later, after a fire detector detects a fire and after a predetermined sign is placed, the sign flashes using a flashing signal.

(5a) Distance 11 from entrance (6) of i-tunnel (2)
A traffic light installed at a distance in the direction of the car's arrival,
(7) is a first variable sign installed at a distance of 42 from the traffic light +51 in the direction of arrival of the vehicle, and the speed limit is variable indicated.

(8) is a second variable sign installed at a position 13 degrees away from sign (7) in the direction of arrival of the vehicle.

Note that 11<Ih is limited to the relationship 11=12=13.
<13. Alternatively, it is determined based on various road conditions 9 surrounding environments such as straight roads, curves, crosswind caution areas, etc., such as the relationship 11=12<Its. (9) is a car moving in the direction of the arrow, (sb), (5c), (5
d) are traffic lights in the tunnel, each of which is located between the fire detectors and controlled by a controller (4).

In such a configuration, if there is no abnormality, the traffic light (s
a), (sb)... should always be marked as ``Sui'', and signs (7) and (8) should be marked as the maximum speed of the expressway (for example, 1100 K/h).

In such a state, if a fire occurs in the tunnel, one of the fire detectors (3a), (3b), etc. is activated and gives a detection signal to the controller (4).

Thereby, the controller (4) outputs a control signal 1 (l).

Switch the traffic light on the entrance side of the tunnel from the fire detector that issued the detection signal and the traffic light (5a) from "clear" to "red", and switch the first. Second sign (7), change the +81 sign.

In other words, if the fire detector (3c) now issues a detection signal, the traffic lights (5d), (5c), and (5b) located on the entrance side of the 111 channel will change from "blue" to "1 red". Become.

Also, if the fire detector (3b) is activated, the
sc), (5b) is "red", the vehicle traveling in the tunnel that is closer to the entrance of the tunnel than the fire detector is stopped. At the same time, a traffic light (5a
) is also set to "red". Furthermore, the speed sign of sign (7) is set to, for example, 30 Km/h, and the speed sign of sign (8) is set to, for example, 60 Km/h.

More specifically, the speed of the vehicle is gradually reduced before the traffic light (5a).

In addition, to do this, 12. It goes without saying that the is distance must take into account the braking distance and must be sufficient to cope with the speed drop.

Next, examples of the configuration of signs (7) (8I) are shown in Figures 2, 3, and 4.
This will be explained using figures.

Figure 2 shows an example of the structure of a sign, where aυ is the minimum unit of display characters, etc. (13 (transparent or opaque))
(I3d is a round rod-shaped light guide formed of one or more dots, made of transparent plastic and made of flexible It has transparency and corresponds to each transparent or translucent dot t12. Note that "Q31" is the minimum unit of a character symbol or figure (picture) to be described later. One end of the light guide is It is fixed to the dot α2 portion of the front plate αυ, and the other end is located at the light generating device (141).

That is, the light generating device α4 is composed of a light source (for example, a halogen lamp) α9 and a reflector αe that reflects the light emitted from the light source (Is), and the other end of the light guide a3 is It is located at the focal point of the reflector αe.

Therefore, [light source (i!1
9 lights up, the light enters from the other end of the light guide a3 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, where ■ is a front plate, (15-1) to (13-n) are light guides, (I
4 is a light generator, αS is a light source, αe is a reflector, αη is a power source, (1a-1) to (1B-n) are optical switches, and the respective light guides (15-t) to (13- It)
The selection is controlled by two individual selection circuits (l'J). (41 is a controller, and this controller (
The selection circuit (11) selects and controls the light switch according to a signal generated by fire detection from 4).

Further, the flicker signal generated from the blinking signal generator FS of the controller (4) is applied to the power supply αη, and the power supply αη is turned on.

OFF control.

Therefore, if the controller (4) outputs a control signal to change the speed indicator according to the speed of the oncoming car when a fire is detected, the selection circuit α'th light switch is selected and the normal speed is set. Display a speed sign lower than the posted speed sign.

Therefore, it is possible to indicate the speed for deceleration in consideration of the braking distance in order to stop an incoming car before the traffic light (5a) at 4J (7) and (81) respectively.

It also flashes to alert the driver.

〔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. You can reduce your speed step by step according to the instructions of the road signs and stop before the tunnel entrance.
This can prevent the accident from spreading.

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

Additionally, turning red lights and 7-turn red lights will be added to the traffic lights inside the tunnel, so that when the inertia changes from "green" to "red", drivers will be alerted to the fact that the light has changed to red. You can also do this.

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

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

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the signal control method according to the present invention, and FIGS. 2 to 4 are diagrams showing examples of signs used in the present invention. tunnel,
(3a), (3b) = (3e)゛・ti fire detector, (4) is the controller, (5a), (5b)
, (5c)" is a traffic light, (611!) channel entrance, +71f81 is a sign, (9) is a car, α [ is a control signal. I is a front plate, ttzh dot, 13 is a light guide, I is a light generator , 19 is a light source, αe is a reflector, αη is a power supply, 0 is a light switch, (1'J is a selection circuit, and FS is a flashing signal generator. In addition, the same or equivalent parts in Figure 1 are given the same symbols. It is shown attached.

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 any one or more of the multiple fire detectors is activated in response to smoke or heat, a traffic light closer to the entrance than the fire detector will be activated. In addition, the traffic lights installed in front of the tunnel entrance will be switched from "green" to "red," and the sign located furthest from the tunnel entrance will be switched to a speed limit lower than the maximum speed of the expressway. By switching the other signs located between this sign and the traffic light located in front of the tunnel entrance to a lower speed limit than the sign located farthest from the tunnel entrance, A feature of the system is that the vehicles traveling through the tunnel are stopped, and the speed of vehicles traveling toward the tunnel entrance is gradually reduced until they stop at a traffic light installed in front of the tunnel entrance. traffic signal control method. (2) All the signs placed in the direction from the entrance of the tunnel to the direction of the vehicle are set to flash after the speed limit is set so that the vehicle stops before the traffic light. 1) Traffic signal control method described in section 1).