SU945881A1 - Device for control of coming to the main road - Google Patents

Description

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The invention relates to the technological means of traffic control and can be used in systems of automated traffic control.

A device for traffic control is known, comprising a transistor detector connected via a first memory unit to a first time relay connected to the traffic light inputs directly and through sequentially connected one logic unit and a second time relay, a vehicle presence sensor is also connected to the driver, the outputs of which through the time delay blocks are connected to another logical block SP.

The closest to the proposed technical entity is a device for controlling a highway entrance containing a transport detector connected to a control unit, installed outside the main road front entrance strip, a second transport detector and a light (circuit 1 installed at the entrance).

5 The drawback of the device is that with an increase in the intensity of traffic on the outer lane of the highway, the device switches to a fixed mode of operation of the traffic light, i.e.

10 cars are skipped as npi in the presence of an acceptable interval, and in its absence. The latter case is the most dangerous for traffic in the area of entry, since the driver entering

ts a car is deprived of information about the possibility of entry; it is faced with the need to enter the main stream, which has a considerable intensity, which leads to the danger of a traffic accident.

The purpose of the isobretenie is to increase the safety of entry into the outer lane of the main road while increasing the intensity of movement along it. The goal is achieved by the fact that the first traffic detector connected to the control unit, installed on the outer lane of the main road before its intersection with the secondary road, and the second traffic detector and traffic light installed on the secondary road ahead of it, is connected to the device for controlling the entrance to the main road intersection with the main road, a controlled speed limit sign was entered. and a third transport detector installed on the outer lane of the main road and connected to Control CCCH. The drawing shows the functional diagram of the device. The road device contains a speed limiter sign 1, traffic detectors 2 and 3, located on the outer main road 4 and connected to the control unit 5. In addition, the device contains a traffic light 6 and a third transport detector 7 located on the secondary road 8 before its intersection with the main road k and connected to the control unit. The device works as follows. As the service time of vehicles waiting for entry permits increases, the control unit 5 sends a signal to the control sign 1 of the speed limit by a certain amount. On the scoreboard of the control mark 1, a speed value is established, which vehicles are not allowed to exceed. The velocity specified by the transport flow must be less than the average flow velocity. As a result of such a restriction, a part of the cars that were in front of the sign 1 at the moment of its switching on will move at the set speed, and those cars that were at that moment between the sign and the entrance will move at the same speed. The difference between the average and the set speed will provide a local drop in the intensity of the vacuum) in the entry section, since cars whose speed is limited will constantly lag behind the rest. The control unit 5 simultaneously with the controllable mark 1 starts the transport detector g i 4 tor 3) which continuously registers the change (decrease in intensity just before the entrance. As a result of local speed limitation, the intensity of movement just before the entrance will take the value at which Sta- tion: there is no possibility of unhindered entry to the main road of waiting cars. Transport detector 3 registers a decrease in intensity and compares it with some The m setpoint at which unrestricted entry is ensured turns on the green signal of the traffic light 6 at the moment when the current and predetermined intensity is equal through the control unit. By the value of the specified speed and distance from control sign 1 to the entrance, control block 5 determines the moment when the green light turns off and the red light turns on, lights 6 are actuated. At this moment, the wave speed of the cars is compressed by the speed limit approaching the entrance. In the future, the device works in a similar way. If the vehicle's service time is reduced to a certain value, the device automatically switches to the gap search algorithm. Thus, the local short-term restriction of the speed of the traffic flow before entry causes a local drop in intensity in the entry cross section, which makes it possible to safely enter the main road with an increase in the intensity of the main traffic flow. The magnitude of the speed to be set, the intensity at which unrestricted entry is ensured, and the critical service time can be determined based on specific db conditions. These parameters can be set automatically. The invention device for controlling the entrance to the main road, containing the first transport detector connected to the control unit, mounted on the outer lane of the main road before its intersection with the secondary road, the second transport detector

and traffic lights installed on

the secondary side of the main road and

foamy road before its intersection connected to the control unit.

with the main road, I differ from the fact that, in order to increase the maneuver safety with increasing traffic on the outer main road, a controlled speed limit sign and a third transport detector installed in the device are inserted

9 58816

Sources of information taken into account in the examination

1. USSR author's certificate No. 66535, cl. G 08 G 1/09, 1373.

2.Dru, D. Theory of transport flows and their management. M., Transport, 1972, p. (prototype).

Claims (1)

Claim A device for controlling the entrance to the main road, comprising a first transport detector connected to the control unit installed on the outer lane of the main road before it intersects with the secondary road, a second transport detector 5,945s and a traffic light installed on a secondary road before its intersection with the main road, I distinguish * with the fact that, in order to increase the safety of maneuver with increasing traffic intensity s on the outer lane of the main road, a controlled sign is introduced into the device speed limits and a third transport detector installed ¹ 6 on the outer lane of the main road and connected to the control unit.