JP5567358B2 - Traffic signal control apparatus and traffic signal control method - Google Patents

Description

  The present invention relates to a traffic signal control device or the like of a point control system that controls a signal device in accordance with a value of a signal control parameter defined in a control pattern.

  Traffic signal controllers include a centralized control system that is collectively controlled by a traffic management center and a spot control system that is locally controlled independently. A conventional traffic signal controller of a point control system has a built-in timer (clock), and switches a control pattern to be used from a plurality of predetermined control patterns (time table) according to a time zone. Yes. In addition, as disclosed in, for example, Patent Document 1, there is also known one that switches a control pattern in accordance with a traffic volume or an occupation rate measured by a sensor.

JP-A-7-93690

  The traffic signal controller has additional functions such as various sensitive functions, a recall function, a flashing operation, and a light extinguishing operation defined in the police specification. However, the additional functions are often used in the traffic signal controller of the centralized control system. In the traffic signal controller of the point control system, the time zone is linked with the switching of the control pattern according to the time zone. In general, the control for executing / stopping the additional function according to the above has been performed. The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to more adaptively execute execution / stop switching of an additional function in a traffic signal controller of a point control system.

The first form for solving the above problem is
A plurality of control patterns in which various values of the signal control parameter are determined are selected according to a combination of traffic conditions based on the detection result of the sensor, and the own signal device is selected according to the value of the signal control parameter determined in the selected control pattern. A traffic signal control device (for example, traffic signal controller 30 in FIG. 1) of a point control system for controlling
Additional function setting means (for example, five status setting tables 350) for setting an additional function that can be executed in each of a plurality of statuses that are predetermined as the selection state of the additional function;
Status selection means (for example, the processing unit 200 of FIG. 2 and the traffic state correspondence pattern selection table 330 of FIG. 3) for selecting one status among the plurality of statuses according to the combination of the traffic conditions;
Additional function execution control means (for example, the processing unit 200 in FIG. 2) that enables execution of the additional function set in the status selected by the status selection means;
Is a traffic signal control device.

As another form,
A plurality of control patterns in which various values of the signal control parameter are determined are selected according to a combination of traffic conditions based on the detection result of the sensor, and the own signal device is selected according to the value of the signal control parameter determined in the selected control pattern. A traffic signal control method of a point control system for controlling
An additional function setting step for setting an additional function that can be executed in each of a plurality of statuses determined in advance as a selection state of the additional function;
A status selection step of selecting one status among the plurality of statuses according to the combination of the traffic conditions;
An additional function execution control step that enables execution of the additional function set in the status selected in the status selection step;
A traffic signal control method including

  According to the first form and the like, in the traffic signal control device of the point control system, an additional function that can be executed for each of the plurality of statuses is set, and according to the combination of the traffic state based on the detection result of the sensor, One status is selected from the plurality of statuses, and the additional function selected and set in the status is made executable. That is, according to the combination of traffic conditions, the control pattern can be switched, and the status can be switched to execute the additional function associated with the status.

Moreover, as a 2nd form, it is the traffic signal control apparatus of a 1st form,
Further comprising status setting means (for example, a traffic state correspondence pattern selection table 330 in FIG. 3) for setting a status corresponding to each of the control patterns;
The status selection means selects a status corresponding to the control pattern currently selected according to the combination of the traffic conditions.
A traffic signal control device may be configured.

  According to the second form and the like, the status corresponding to each control pattern is set, and the status corresponding to the currently selected control pattern is selected according to the combination of traffic conditions.

Further, as a third form, the traffic signal control apparatus of the second form,
The plurality of statuses include standard statuses that allow selection at all times,
Each of the other statuses excluding the standard status further includes an allowable time zone setting unit (for example, the status setting table 350 in FIG. 5) for setting an allowable time zone in which the status can be selected.
The status selection means selects the status when the current time is within the allowable time zone of the status corresponding to the currently selected control pattern, and selects the standard status when the current time is outside the allowable time. ,
A traffic signal control device may be configured.

  According to this third form, etc., the plurality of statuses include standard statuses that allow selection in all time zones, and there are allowable time zones that can be selected for each of the other statuses other than this standard status. The status is set when the current time is within the allowable time of the status corresponding to the currently selected control pattern, and the standard status is selected when the current time is out of the allowable time.

An installation example of a traffic signal control system at an intersection. Functional block diagram of a traffic signal controller. The data structural example of a traffic condition corresponding | compatible pattern selection table. The data structural example of a sensor group definition table. The data structural example of a status setting table. The data structural example of additional function execution availability data. The flowchart of a traffic signal control process.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, an example of a traffic signal control system to which the present invention is applied will be described, but embodiments to which the present invention can be applied are not limited thereto.

[System configuration]
FIG. 1 is a diagram illustrating an installation example of the traffic signal control system 1 in the present embodiment. The traffic signal control system 1 is a point control system that controls traffic signals independently at its own intersection, and includes a traffic signal lamp 10, a sensor 20, and a traffic signal controller 30.

  The traffic signal lamps 10 are for vehicles, pedestrians, and the like, and are installed at positions where the vehicles and pedestrians to be controlled are easily visible. The traffic signal lamp 10 is driven by a lamp driving unit (not shown) attached in the vicinity under the control of the traffic signal controller 30. In FIG. 1, only the traffic signal lamp 10 for vehicles is shown, and this traffic signal lamp 10 is attached above the pillar installed in the predetermined position of the intersection so as to face the traffic vehicle to be controlled. .

  The sensor 20 includes a vehicle sensor, a bus sensor, a pedestrian sensor, and the like, and is installed at a position where the sensing object can be easily sensed. The sensor 20 is, for example, an ultrasonic type, an optical type, or an image type, and is configured to detect the presence of a vehicle, a bus, a pedestrian, or the like as a detection target that passes through an installed position. A sensing signal from the sensor 20 is output to the traffic signal controller 30 at any time. In FIG. 1, only vehicle sensors are shown as the sensors 20, and these vehicle sensors 20 are installed, for example, above a pillar installed on the road side so as to overlook a traveling lane to be detected from above. Yes.

  The traffic signal controller 30 is installed, for example, below or near any of the pillars to which the traffic signal lamps 10 are attached, and controls the entire traffic signal at its own intersection. Specifically, the signal display of each traffic signal lamp 10 at its own intersection is controlled according to a predetermined control pattern (time table) that defines signal control parameters such as cycle length and split.

  Here, as a traffic signal control mode, a "time zone control mode" for performing so-called multistage constant cycle control using a control pattern selected according to the current time among a plurality of predetermined control patterns, and a sensor There is a “traffic state control mode” using a control pattern selected according to the traffic state of the own intersection estimated from the sense signal from 20. This control mode can be arbitrarily set by an administrator of the traffic signal control system 1.

  Note that FIG. 1 shows a case where a traffic signal lamp 10 and a sensor 20 are installed for a vehicle traffic on each of four inflow paths for a crossing intersection where two roads intersect, but the shape of the intersection The number of traffic lights, detectors and detectors is not limited to this.

[Traffic signal controller]
FIG. 2 is a block diagram showing a functional configuration of the traffic signal controller 30. As shown in FIG. 2, the traffic signal controller 30 is functionally configured to include an operation unit 110, a timing unit 120, a communication unit 130, a processing unit 200, and a storage unit 300. .

  The operation unit 110 is realized by an input device such as a button switch or a touch panel, for example, and outputs an operation signal corresponding to the operation of the administrator of the traffic signal control system 1 to the processing unit 200.

  The timer 120 measures the current time, the elapsed time from the specified timing, and outputs the time and elapsed time to the processing unit 200.

  The communication unit 130 is realized by, for example, a wireless or wired communication device such as an SS wireless device, and performs communication with the sensor 20 and the driving device of the traffic signal lamp device 10.

  The processing unit 200 is realized by an arithmetic device such as a CPU, for example, and is based on a program and data stored in the storage unit 300, an operation signal from the operation unit 110, a detection signal from the sensor 20, and the like. Instructions and data transfer to each part constituting 30 are performed, and overall control of the traffic signal controller 30 is performed. The processing unit 200 performs a traffic signal control process according to the traffic signal control program 310.

  In this traffic signal control process, when the control mode is the “time zone control mode”, the processing unit 200 follows the time zone correspondence pattern selection table 320 according to a plurality of time zone control mode control patterns (specifically, One control pattern corresponding to the current time is selected from the ten control patterns P1 to P10), and each traffic signal lamp 10 at the intersection is controlled according to the selected control pattern.

  The time zone corresponding pattern selection table 320 is a data table in which one of the time zone control mode control patterns P1 to P10 is associated with each combination of a day of the week such as a weekday and a holiday and a time zone such as morning, noon, and night. . In addition, the setting content of this time slot | zone corresponding | compatible pattern selection table 320 can be changed by the change instruction | indication from the operation part 110 by the administrator of the traffic signal control system 1, for example.

  On the other hand, when the control mode is “traffic condition control mode”, the processing unit 200 first responds to the sensor 20 based on the detection signal from each sensor 20 as the traffic state of the own intersection. Calculate the traffic volume and occupancy of the traffic route.

  Next, according to the traffic condition correspondence pattern selection table 330, one control corresponding to the calculated traffic condition from among a plurality of control patterns for the traffic condition control mode (specifically, 15 control patterns P11 to P25). A pattern is selected, and each traffic signal lamp 10 at its own intersection is controlled according to the selected control pattern.

  Further, according to the traffic condition correspondence pattern selection table 330, a status corresponding to the calculated traffic situation is selected. Then, referring to the status setting table 350, it is determined whether or not the current time is within the selection allowable time zone of the selected status. If it is within the allowable time, the status is switched to the selected status, and the switched status is set as the execution condition. The additional function to be executed can be executed. At this time, if the selected status is not within the allowable time, the status is switched to a predetermined status (standard status) instead of the selected status. Here, the status defines the selection state of the additional function.

  FIG. 3 is a diagram illustrating an example of a data configuration of the traffic state correspondence pattern selection table 330. According to FIG. 3, the traffic state correspondence pattern selection table 330 stores the selection condition 331, the control pattern 332, and the status 333 in association with each other.

  The selection condition 331 is a condition related to the traffic state of the own intersection, and specifically, a combination of the traffic states of the sensor groups obtained by grouping the plurality of sensors 20 installed at the own intersection. Specifically, the traffic condition of the sensor group means that the traffic volume of at least one sensor 20 among the sensors 20 included in the sensor group exceeds a predetermined threshold (O), or The occupation rate exceeds a predetermined threshold (◎).

  Note that the setting contents of the traffic state correspondence pattern selection table 330 can be changed by, for example, a change instruction from the operation unit 110 by an administrator of the traffic signal control system 1.

  Sensor groups are defined in the sensor group definition table 340. FIG. 4 is a diagram illustrating an example of a data configuration of the sensor group definition table 340. As illustrated in FIG. According to FIG. 4, the sensor group definition table 340 stores the sensor group 341 and the sensors 342 included in the group in association with each other.

  The sensor groups are grouped in units of the display displayed at the intersection. Specifically, for example, the present intersection 1φ that gives the right of traffic to the vehicle traffic on the main road, the current indication 2φ that gives the right of traffic to the vehicle traffic on the secondary road, and a current indication 3φ dedicated to the right turn on the main road Are displayed in order, for each of these indications 1φ to 3φ, the sensors 20 for sensing vehicle traffic to which the right of passage is given by the indications are grouped as one group. Grouped.

  Note that the setting contents of the sensor group definition table 340 can be changed by a change instruction from the operation unit 110 by an administrator of the traffic signal control system 1, for example.

  FIG. 5 is a diagram illustrating an example of a data configuration of the status setting table 350. According to FIG. 5, the status setting table 350 stores a selection allowable time zone 352 and an additional function 353 that can be executed in association with each status 351. In addition, the setting content of the status setting table 350 can be changed by, for example, a change instruction from the operation unit 110 by an administrator of the traffic signal control system 1.

  Further, whether or not each additional function can be executed at the present time is stored in the additional function execution availability data 360. FIG. 6 is a diagram illustrating an example of a data configuration of the additional function execution availability data 360. According to FIG. 6, the additional function execution availability data 360 stores an execution availability flag 362 in association with each additional function 361.

  Data such as signal control parameters determined for each control pattern (P1 to P25) is stored as control pattern data 370.

  Returning to FIG. 2, the storage unit 300 is realized by a storage device such as a hard disk, a ROM, or a RAM, and the system unit 200 for the processing unit 200 to integrally control the traffic signal controller 30 and various functions are realized. Are stored as well as used as a work area of the processing unit 200, and temporarily store the calculation results executed by the processing unit 200 according to various programs. In the present embodiment, the storage unit 300 stores a traffic signal control program 310 as a program, and as data, a time zone corresponding pattern selection table 320, a traffic state corresponding pattern selection table 330, and a sensor group definition table. 340, a status setting table 350, additional function execution availability data 360, control pattern data 370, and a control mode 380 indicating the currently set control mode are stored.

[Process flow]
FIG. 7 is a flowchart for explaining traffic signal control processing by the traffic signal controller 30. According to FIG. 7, the processing unit 200 first determines whether or not the control mode has been changed, and if changed (step A1: YES), determines the control mode after the change.

  If the changed control mode is “time zone control mode” (step A3: NO), the control pattern corresponding to the current time is selected with reference to the time zone corresponding pattern selection table 320 (step A5), and the selected control is selected. Control of the traffic signal lamp 10 according to the pattern is started (step A7).

  On the other hand, if the control mode after the change is “traffic state control mode” (step A3: YES), the processing unit 200 determines the traffic state corresponding to the sensor 20 based on the detection signals from the respective sensors 20. (Traffic volume and occupation rate) are calculated (step A9). Next, referring to the traffic condition correspondence pattern selection table 330, a control pattern corresponding to the calculated traffic condition combination of each sensor 20 is selected (step A11), and the traffic signal lamp 10 is controlled according to the selected control pattern. Is started (step A13).

  Similarly, referring to the traffic condition correspondence pattern selection table 330, a status corresponding to the calculated traffic condition combination of each sensor 20 is selected (step A15). Subsequently, referring to the status setting table 350, it is determined whether or not the current time is within the selection allowable time of the selected status. If the current time is within the allowable time (step A17: YES), the status is switched to the selected status (step A19). ), If it is outside the allowable time (step A17: NO), it is switched to a predetermined status ("standard" status) (step A21). Thereafter, an additional function corresponding to the status after switching is made executable (step A23). If the above process is performed, the process part 200 will return to step A1 and will repeat the same process.

[Action / Effect]
As described above, in the traffic signal control system 1 of the present embodiment, the traffic signal controller 30 of the point control method selects a control pattern according to the current time when the control mode is the “time zone control mode”. Then, the traffic signal lamp 10 is controlled according to the control pattern.

  On the other hand, when the control mode is the “traffic state control mode”, a control pattern corresponding to the traffic state (traffic volume and occupation rate) based on the detection signal from each sensor 20 according to the traffic state correspondence pattern selection table 330 is displayed. Select and control the traffic light 10 according to the control pattern. At the same time, a status corresponding to the traffic state is selected, and according to the status setting table 350, if the current time is within the selection allowable time set in the selected status, the status is switched to, and if it is outside the selection allowable time, a predetermined After switching to the status (“standard”), the additional function set in the switched status can be executed. That is, it is possible to switch the execution / stop of the adaptive additional function according to the traffic situation.

DESCRIPTION OF SYMBOLS 1 Traffic signal control system 10 Traffic signal lamp 20 Sensor 30 Traffic signal controller 110 Operation part, 120 Time measuring part, 130 Communication part 200 Processing part 300 Storage part 310 Traffic signal control program 320 Time zone corresponding pattern selection table 330 Traffic state correspondence Pattern selection table,
340 Sensor group definition table, 350 Status setting table 360 Additional function execution availability table, 370 Control pattern data 380 Control mode

Claims (3)

A traffic signal control device that controls a traffic signal at its own intersection by a point control method,
Among the additional functions of the traffic signal at the intersection, a status storage means that stores a plurality of statuses in which a combination of additional functions to be executed is set as one status;
A calculation unit that to calculate the right-of-way vehicular traffic in each of given traffic and occupancy by each current-,
Using the calculated result of the calculating means, traffic combination of vehicular traffic in the traffic state exceeds a predetermined threshold value, or according to a combination of vehicle traffic in the traffic state occupancy exceeds a predetermined threshold value , Status selection means for selecting one of the statuses stored in the status storage means;
Additional function execution control means for controlling execution of the additional function set in the status selected by the status selection means;
A traffic signal control device. The status storage means includes a plurality of statuses including a standard status including an allowable time zone in which a set additional function is executed in all time zones, and is set for a status other than the standard status. Store the allowable time zone for executing the additional function in association with it,
The status selection means, the final the status if it contains a current time within the allowable time stored in association with the selected status according to a combination of traffic conditions of each vehicle traffic calculated by the calculating means Select, if not included, final select the standard status,
The additional function execution control means controls execution of the additional function set in the status finally selected by the status selection means;
The traffic signal control device according to claim 1. A traffic signal control method for controlling traffic signals of own intersection by a point control method,
Among the additional functions of the traffic signal at the intersection, a plurality of statuses set with a combination of additional functions to be executed as one status are stored in the status storage means, and
A calculation step that to calculate the right-of-way vehicular traffic in each of given traffic and occupancy by each current-,
Using the calculated result of the calculating step, traffic combination of vehicular traffic in the traffic state exceeds a predetermined threshold value, or according to a combination of vehicle traffic in the traffic state occupancy exceeds a predetermined threshold value , A status selection step for selecting one of the statuses stored in the status storage means;
An additional function execution control step for controlling the execution of the additional function set in the status selected in the status selection step;
A traffic signal control method including:

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