JPH09326097A - Traffic volume predicting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To limit entering vehicles at a road entrance while informing users of a traffic congestion distance before they enter a freeway, and relieve the traffic congestion by temporarily storing a radio wave from an automobile that a sensor detects, and sending the calculated congestion distance and entrance control data to a display part and an entrance control part. SOLUTION: A radio wave transmission part 1 mounted on each automobile sends a radio wave which has a unique frequency as well as a license plate and constant output. Sensors 2 which are installed on the side wall of the road at constant intervals capture radio waves sent from respective automobiles and the data reception part 4 of a central monitor and control device 3 catches the radio waves from the sensors 2 directly and temporarily stores a storage part 5 with data consisting of sensor ID numbers and the number of the automobiles. Then a central arithmetic part 6 calculates the distance and section of the traffic congestion and further entrances whose entries should be limited to reduce the traffic congestion on the basis of the data, and the calculation data are sent to the display part 8 and entrance control part 9 to display the traffic congestion state to the users and limit the entries.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic volume prediction that alleviates traffic congestion by restricting entry to highways and the like while informing the user of traffic conditions installed at or near entrances of highways and the like. Regarding the device.

[0002]

2. Description of the Related Art Conventionally, a number of display devices have been installed as a service for users at or near an entrance of a road such as an expressway. Especially during large holidays and during the year-end and New Year holidays, traffic congestion on expressways can become anomalous for tens of kilometers, so appropriate mitigation measures must be taken.

However, at present, there is only a display such as how many kilometers the traffic congestion is, and entry of the expressway is restricted only when the weather is abnormal or an accident occurs. Therefore, there is no suitable means for restricting entry. Therefore, the user has to enter a busy expressway or the like, which further aggravates the traffic congestion.

[0004]

[Problems to be Solved by the Invention] Under the circumstances as described above, traffic congestion becomes chronic at each consecutive holiday such as large holidays and year-end and New Year holidays, which increases stress on road users and causes accidents. It causes a lot of bad situations such as economic loss due to waste of time and fuel.

The present invention has been made in view of the above circumstances, and an object thereof is to allow a road user such as an expressway to know the degree of traffic congestion on a road before entering the road and to enter the road at the same time. An object is to provide a traffic volume prediction device that restricts traffic congestion on roads.

[0006]

In order to achieve the above object, the traffic volume predicting apparatus according to claim 1 of the present invention is transmitted from a plurality of automobiles running on a road such as a highway, and from each of the automobiles. A sensor that receives a unique radio wave, a central monitoring control unit that inputs the data received by the sensor, and a display that displays the status at the entrance of the highway, etc. by calculating the congestion status in the central monitoring control unit A device and, if necessary, restricting entry into the expressway or the like to alleviate traffic congestion on the road.

According to a second aspect of the present invention, there is provided a traffic volume predicting apparatus, a plurality of automobiles traveling on a road such as an expressway, radio wave transmitting means installed in each of the automobiles for transmitting an individual radio wave, and the road A sensor that detects the number of emitted radio waves installed at a constant interval on the side wall and the like, a data receiving unit that receives data from the sensor, a storage unit that temporarily stores the received data, and a memory Central processing means for calculating the traffic congestion length based on the obtained data and determining the entrance to which entry is restricted, and the traffic congestion length calculated by the central processing means and entry restriction data for road entrance to the outside Data transmission means to be sent, display means for displaying the traffic congestion length sent from the data transmission means, and a road for actually restricting entry based on entry restriction data sent from the data transmission means. Characterized by comprising an inlet control means provided at the entrance.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of an embodiment of the present invention. In the figure, the radio wave transmission unit 1 is installed in each car of the user, and transmits a radio wave having a unique frequency and a constant output, like a license plate. The sensors 2 are installed at regular intervals on the side wall of the road or the like, and capture the radio waves transmitted from each car. The radio waves captured by the sensor 2 are sent to the central monitoring control device 3.

The central supervisory control device 3 has a data receiving section 4 for directly capturing radio waves, and the data captured from this is temporarily stored in a storage section 5. The data stored here includes a sensor ID number (ID No.) and the number of vehicles. Based on this data, the central processing unit 6 calculates the length (km) and section of traffic congestion, and the entrance (interchange) at which entry is restricted to alleviate traffic congestion. This calculated data is sent to the display unit 8 so that the user can know the traffic congestion situation. Further, the calculation data is sent to the entrance control unit 9 where measures are taken to reduce the traffic congestion by restricting entry.

FIG. 2 is a view for explaining a method for detecting the number of vehicles in the traffic volume predicting apparatus according to the present invention. The radio waves emitted by each car are maintained at a constant output, and the following equation holds. l ₁ ≤ range of radio wave ≤ l ₂ Therefore, no matter where the vehicle is located, the radio waves emitted from one vehicle are detected only by the sensors 2 at maximum.

For example, an electric wave transmitted from a car A at a certain moment is detected by two sensors B and C. Further, since the radio wave of car B does not reach sensor A, it is detected only by sensor B.

At this time, the number of vehicles stored in each sensor is n ₁ = 1, n ₂ = 2, n ₃ = 0 for the sensors A, B and C.

However, in practice, between the sensors B and C,
Cars are not n ₁ + n ₂ = 3 cars, but n ₁ + n ₂ −1 =
There are two cars. In order to correct this number of vehicles, the sensor 2 determines the priority order between the adjacent sensors,
And immediately before sending the number of vehicles to the central monitoring and control device 3,
The data held in the adjacent sensor 2 is searched, and when the radio wave data of the same car is found, the sensor with lower priority discards its own data and sends it to the central monitoring control device 3. .

For example, if a sensor close to the up direction is determined as a high rank, the detection data of car A included in sensor C is deleted by itself. Therefore, the number-of-vehicles data is sent to the central supervisory control device 3 with n ₁ =, n ₂ = 2, n ₃ = 0.

If the sensor 2 is installed for each distance L, two vehicles will exist within the distance of 2L. A reference value of the number of vehicles for a distance of 2L is held in the central monitoring and control device 3 in advance, and when a larger number of vehicles is received, this section is determined as a traffic jam section.

FIG. 3 is a diagram showing a case where the present invention is applied to an actual road. Radio wave transmitter 1 equipped in a car
Always emits a radio wave with a unique frequency and output. This radio wave is captured by the sensor 2. The sensor 2 calculates the number of vehicles by capturing radio waves from a plurality of vehicles. After this, from the sensor 2, the ID No. of the sensor 2 is added to this number of vehicles. Is added and sent to the central monitoring control unit 3. The length and section of traffic congestion are calculated by the central monitoring and control unit 3 and sent to the display unit 8. Here, the user is informed of the traffic jam situation. Further, the central monitoring control unit 3 sends control data to an entrance where entry is restricted, that is, an entrance control unit 9. As a result, the vehicles entering can be restricted according to the traffic congestion situation, and therefore the traffic congestion can be alleviated.

[0017]

As described above, according to the present invention,
The sensor detects radio waves from the radio wave oscillating means installed in each car, sends them to the data receiving means and temporarily stores them in the storage means, and calculates them as the congestion length and entrance control data by the central processing means, which is the data transmission. By being sent to the display means and the entrance control means via the means, it is possible to inform the user of the traffic congestion length of the road section and at the same time to restrict the entry at the road entrance, thus alleviating the traffic congestion. be able to.

[Brief description of drawings]

FIG. 1 is a system configuration diagram according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining detection of the number of vehicles according to the present invention.

FIG. 3 is a schematic diagram when the traffic volume prediction device of the present invention is applied to a road.

[Explanation of symbols]

1 ... Radio wave transmitter, 2 ... Sensor, 3 ... Central monitoring controller, 4
... data receiving section, 5 ... storage section, 6 ... central processing section, 7 ... data transmitting section, 8 ... display section, 9 ... entrance control section.

Claims (2)

[Claims] 1. A plurality of automobiles traveling on a road such as an expressway, a sensor for receiving a unique electric wave transmitted from each automobile, and a central monitoring control unit for inputting the data received by the sensor. A display device for calculating the traffic jam condition at the central monitoring control unit and displaying the traffic condition at the entrance of the expressway, etc., and if necessary, restricting entry to the expressway etc. to alleviate the traffic jam on the road A traffic volume prediction device characterized by the above. 2. A plurality of automobiles traveling on a road such as a highway, an electric wave transmitting means for transmitting an electric wave unique to each automobile, and a transmitted electric wave installed on a side wall of the road at regular intervals. A sensor for detecting and detecting the number thereof, a data receiving means for receiving data from the sensor, and a storage means for temporarily storing the received data,
Central processing means for calculating the traffic congestion length based on the stored data and determining the entrance to which entry is to be restricted, and traffic congestion length calculated by the central processing means and entry restriction data for road entrances to the outside To the road entrance for actually restricting entry based on the entry restriction data sent from the data sending means, the data sending means sending to the data sending means, the display means for displaying the traffic congestion length sent from the data sending means, A traffic volume prediction apparatus comprising: an entrance control means provided.