JPH0684094A - Signal control device - Google Patents

Abstract

PURPOSE:To improve the smoothness of road traffic by executing signal control corresponding to the actual situation of the road traffic. CONSTITUTION:Vehicle sensors 3 and speed sensors 4 are arranged at every intersection. Also, the vehicle sensors 3 are arranged at the entrance of the intersection for all traffic lanes. A signal controller 2 calculates signal control parameters for every intersection based on the degree of the saturation of roads detected by the vehicle sensors 3 and the speed sensors 4. The signal control parameters are adjusted by considering the degree of the conjestion of entire roads at a signal control central unit 1 and then are transmitted to the signal controller, readjustment corresponding to the conditions of the respective intersections is performed at the signal controller and the lighting control of a signal light device 5 is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal controller using a vehicle sensor and a speed sensor installed on a road.

[0002]

2. Description of the Related Art FIG. 4 is a diagram showing a configuration example of a conventional signal control device, and FIG. 5 is a diagram showing an application example of a conventional signal control device. In FIG. Two
Is a signal controller, 3 is a vehicle sensor, 4 is a speed sensor, 5 is a signal lamp, and 6 is a signal line.

Next, the operation will be described. In the conventional signal control device, the vehicle detector 3 for detecting the presence of the vehicle on the road 7 and the speed detector 4 for detecting the speed of the vehicle traveling on the road 7 are on the road 7 as shown in FIG. The vehicle presence signal and the speed signal, which are installed near the main intersection and detected by the vehicle detector 3 and the speed detector 4, are sent to the signal control central unit 1 by the signal line 6. In the signal control central unit 1, based on the signal transmitted,
The degree of congestion in the intersection or an area in which a predetermined number of intersections are combined is determined, and an optimum control pattern is selected from preset signal control patterns. The selected control pattern is transmitted to the signal controller 2 installed at each intersection through the signal line 6 to control the lighting of the indicator lamp of the signal lamp device 5.

[0004]

In the conventional signal control device, as described above, the vehicle detector 3 and the speed detector 4 are installed only near the main intersection, and therefore the congestion degree at other intersections cannot be detected. Also, there is a problem that it is not possible to detect a vehicle that flows out into the side road or a vehicle that flows in from the side road. Further, since the signal control pattern is selected from preset patterns and is not individual control for each intersection, there is a problem that optimum signal control according to the actual condition of road traffic cannot be realized.

The present invention has been made to solve the above-mentioned problems, and enables signal control in accordance with the actual condition of road traffic at each intersection, and at the same time, the road traffic in the entire road extending between the intersections. The purpose is to improve the facilitation of.

[0006]

A signal control device according to the present invention is provided with a vehicle detector and a speed detector for each intersection to detect the presence and speed of the vehicle in all lanes at the entrance and exit of the intersection, and perform signal control. The signal control machine determines the optimum signal control parameters at each intersection based on this information by a predetermined calculation based on this information, raises it to the signal control central unit, and adjusts between the intersections in the signal control central unit. Then, the result is transmitted to the signal controller, and finally the individual signal controllers perform readjustment according to each intersection.

[0007]

According to the present invention, the saturation level of each intersection is detected by the vehicle sensor and the speed sensor installed at each intersection, and the optimum signal control parameters are calculated individually by the signal controller installed at each intersection. At the signal control central unit that controls the signal controllers at each intersection, the traffic flow of the entire road is adjusted and transmitted to the signal controller, and the signal controller performs readjustment according to the situation of each intersection again. , Smooth the road traffic by controlling the traffic signals at each intersection.

[0008]

【Example】

Example 1. FIG. 1 is a diagram showing a configuration example of a signal control device according to the present invention, and FIG. 2 is a diagram showing an embodiment of a signal control device according to the present invention. In FIG. It is the same. In the present invention, as shown in FIG. 2, the vehicle detector 3 is connected to the road 7 at each intersection.
All the lanes are located at the entrance and the exit of the intersection, and the speed sensor 4 is also installed so that the speed of the traveling vehicle can be detected in all the lanes. The vehicle detector 3 and the speed detector 4 are connected to the signal controller 2 by a signal line 6.

FIG. 3 is a diagram showing an example of a signal control algorithm according to the present invention. In the figure, 8 is a calculation of a saturated traffic flow rate, 9 is a calculation of a required display rate, and 10 is a calculation of a saturation degree of an intersection. , 11 is yellow / all red time calculation, 12 is cycle length calculation, 13 is split calculation, 14 is common cycle length setting, 15 is offset setting, 16 is cycle length correction, 17 is split correction Is. In the signal control device configured as described above, the vehicle detector 3 arranged at the entrance / exit of the intersection is used to determine the straight running rate, the right turn rate, the left turn rate, and the large vehicle mixture rate of the vehicle at the intersection, and the vehicle is installed at the intersection. The signal controller 2 calculates a saturated traffic flow rate that indicates the number of vehicles that can pass through the intersection in a unit time, and from the ratio of this saturated traffic flow rate and the number of vehicles that actually passed, the ratio that gives green time to each route, that is, The required display ratio is calculated, and the saturation of the intersection is calculated from the sum of these. In addition, the yellow and full red times of the signal are calculated from the traveling speed of the vehicle entering the intersection obtained by the speed sensor 4. From the above calculation results, the signal controller 2 calculates the cycle length of one lighting control of the signal lamp 5 and the green time, that is, the split for each route. The control parameters such as the cycle length and the split calculated by the signal controller 2 for each intersection in this way are sent to the signal control central unit 1 through the signal line 6, and the signal control central unit 1 determines the cycle length of each intersection. The control parameters are returned to the signal controller 2 at each intersection by setting the common cycle length to be the same or setting the offset time of the cycle execution timing between the intersections according to the traffic condition. The signal controller 2 corrects the cycle length and the split according to the cycle length and the offset time set in the signal control central unit 1, and then executes the lighting control of the signal lamp 5. The calculation of each control parameter follows a predetermined formula.

[0010]

As described above, according to the present invention, it is possible to detect a more detailed vehicle flow by installing the vehicle detectors at the entrances and exits of the intersections for all lanes of the road, and to detect each intersection. A vehicle detector and a speed detector are installed for each intersection to calculate the signal control parameters that reflect the traffic conditions at each intersection, and the signal control central unit unifies the cycle length between intersections and sets the offset time. In the above, the signal controller modifies the signal control parameters for each intersection and controls the lighting of the signal lights individually, so it is possible to perform signal control that matches the actual conditions of road traffic, and smooth traffic There is an effect that it can improve.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a signal control device according to the present invention.

FIG. 2 is a diagram showing an embodiment of a signal control device according to the present invention.

FIG. 3 is a diagram showing an example of a signal control algorithm according to the present invention.

FIG. 4 is a diagram showing a configuration example of a conventional signal control device.

FIG. 5 is a diagram showing an application example of a conventional signal control device.

[Explanation of symbols]

 1 signal control central unit 2 signal controller 3 vehicle detector 4 speed detector 5 signal light 6 signal line 7 road 8 calculation of saturated traffic flow rate 9 calculation of required display rate 10 calculation of saturation at intersection 11 yellow / total Red time calculation 12 Cycle length calculation 13 Split calculation 14 Common cycle length setting 15 Offset setting 16 Cycle length modification 17 Split modification

Claims (1)

[Claims] 1. A vehicle detector installed at an entrance / exit of an intersection for all lanes of a road, a speed sensor for detecting a speed of a vehicle traveling on all lanes of the road, the vehicle detector and the speed sensor. By calculating the control parameter of the signal based on the number of vehicles and the vehicle traveling speed for each lane of the intersection detected by, the signal controller that performs signal control according to this control parameter, and the command of the signal controller A signal control device comprising: a signal light device that is turned on; and a signal control central device that adjusts the signal control parameter calculated by the signal controller installed at each intersection.