CN110969879B - Automatic control method and system of traffic signal lamp - Google Patents
Automatic control method and system of traffic signal lamp Download PDFInfo
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- CN110969879B CN110969879B CN201811146781.XA CN201811146781A CN110969879B CN 110969879 B CN110969879 B CN 110969879B CN 201811146781 A CN201811146781 A CN 201811146781A CN 110969879 B CN110969879 B CN 110969879B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
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Abstract
The invention provides an automatic control method and system of traffic signal lamps, wherein the method comprises the following steps: and when the residual passing time of the current passing area is less than the threshold value, acquiring the traffic flow of the current passing area and the traffic flow of the next passing area. And if the traffic flow of the current passing area is larger than that of the next passing area, increasing the passing time of the current passing area. If the traffic flow of the current traffic zone is less than or equal to the traffic flow of the next traffic zone, acquiring historical average passing time of the vehicles passing through the traffic intersection in the current time period, and acquiring predicted passing time of the next traffic zone according to the traffic flow information of the next traffic zone and the historical average passing time of the vehicles passing through the traffic intersection in the current time period. The invention can reduce the average waiting number of vehicles, thereby effectively improving the condition of urban traffic road congestion.
Description
Technical Field
The invention relates to the technical field of traffic, in particular to an automatic control method and system of a traffic signal lamp.
Background
With the increasing amount of automobiles kept, road traffic is under increasing pressure. The traffic signal lamp is used as a traffic manager which is most widely applied, and can dredge traffic flow, improve road traffic capacity and reduce traffic accidents.
However, most of the formulation criteria of the current signal lamp timing scheme are timing schemes with several groups of fixed time periods obtained in a road passing experience or theoretical calculation mode, and the current signal lamp timing scheme cannot be applied to various road environments.
In response to the above problems, those skilled in the art have sought solutions.
Disclosure of Invention
The invention solves the technical problem of providing an automatic control method and system of traffic signal lamps, which can reduce the average waiting time of vehicles and timely and effectively improve the congestion condition of urban traffic roads.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a method for automatically controlling a traffic signal light includes: when the remaining passing time of the current passing area is less than a threshold value, acquiring traffic flows of the current passing area and the next passing area, wherein the traffic flows comprise: the number of vehicles waiting in line through the traffic intersection and/or the number of vehicles in the longest flow. And judging whether the traffic flow of the current traffic area is larger than the traffic flow of the next traffic area. And if the traffic flow of the current traffic area is larger than that of the next traffic area, increasing the passing time of the current traffic area. If the traffic flow of the current passing area is smaller than or equal to the traffic flow of the next passing area, acquiring historical average passing time of the vehicles passing the traffic intersection in the current time period, acquiring predicted passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing the traffic intersection in the current time period, and setting the passing time of the next passing area as the predicted passing time when the residual passing time of the current passing area is zero.
In a preferred embodiment of the present invention, the step of acquiring traffic flow information of the current traffic zone and the next traffic zone when the remaining traffic time of the current traffic zone is less than the threshold value includes: and acquiring traffic flow information of the current traffic area and the next traffic area in real time according to image information sent by a monitoring camera and/or positioning information sent by a positioning system.
In a preferred embodiment of the present invention, the step of determining whether the traffic flow of the current traffic zone is greater than the traffic flow of the next traffic zone includes: and comparing the number of the vehicles waiting to pass through the traffic intersection in the current passing area with the number of the vehicles waiting to pass through the traffic intersection in the next passing area.
In a preferred embodiment of the present invention, if the traffic flow of the current passing area is greater than the traffic flow of the next passing area, the step of increasing the passing time of the current passing area includes: and judging whether the number of times of increasing the passing time length of the current passing area exceeds a preset number of times. And if the number of times exceeds the preset number, the step of obtaining the historical average passing time of the vehicles passing through the traffic intersection in the current time period is carried out. And if the number of times does not exceed the preset number of times, increasing the passing time of the current passing area, wherein the increased passing time is a preset fixed value.
In a preferred embodiment of the present invention, the traffic flow information further includes the number of pedestrians waiting to pass through the traffic intersection. Acquiring the predicted passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing the traffic intersection in the current time period, and setting the passing time of the next passing area as the predicted passing time when the passing time of the current passing area is zero: and obtaining the initial passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing through the traffic intersection in the current time period, and adjusting the initial passing time according to the number of pedestrians at the traffic intersection of the next passing area to obtain the predicted passing time.
In a preferred embodiment of the present invention, the step of obtaining a historical average transit time length of the vehicle passing through the traffic intersection in the current time period if the traffic flow of the current transit area is less than or equal to the traffic flow of the next transit area includes: obtaining the historical passing speed of the vehicle at the traffic intersection in the current time period, and obtaining the historical average passing time of the vehicle passing through the traffic intersection in the current time period according to the historical passing speed.
In a preferred embodiment of the present invention, the method for automatically controlling a traffic light further includes: and acquiring the road condition information in front of the current passing area to judge whether a traffic accident occurs on the road in front of the current passing area, and if the traffic accident occurs, prolonging the passing time of the current passing area.
An automatic control system of traffic signal lamps comprises a processor and a controller. The processor is configured to acquire traffic flow information of a current traffic zone and a next traffic zone when a traffic time of the current traffic zone is less than a threshold, where the traffic flow information includes: the method comprises the steps of waiting for the number of vehicles passing through a traffic intersection and/or the number of vehicles of the longest traffic flow in a queue mode, sending information for increasing the passing time of the current passing area to a controller when the traffic flow of the current passing area is larger than the traffic flow of the next passing area, enabling the controller to control a traffic signal lamp to increase the passing time of the current passing area, obtaining the historical average passing time of the vehicles passing through the traffic intersection in the current time period when the traffic flow of the current passing area is smaller than or equal to the traffic flow of the next passing area, sending the predicted passing time to the controller after obtaining the predicted passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing through the traffic intersection in the current time period, and enabling the controller to control the traffic signal lamp to set the passing time of the next passing area as the predicted passing time when the passing time of the current passing area is zero.
In a preferred embodiment of the present invention, the processor is a server.
The technical effect achieved by adopting the technical scheme is as follows: according to the automatic control method and system for passing the traffic signal lamp, the traffic flows of the current passing area and the next passing area are compared when the remaining passing time of the current passing area is smaller than the threshold value, and the passing is performed in the area with the high traffic flow preferentially, so that the road utilization rate is improved, the number of vehicles waiting to pass through the traffic intersection is reduced, and the congestion condition caused by too many vehicles at the traffic intersection is avoided. In addition, according to the automatic control method and the automatic control system for the passing traffic signal lamp, the predicted passing time of the next passing area is determined according to the traffic flow of the next passing area and the historical average time of the vehicles passing through the traffic intersection when the traffic flow of the next passing area is higher or the waiting time is too long, so that the predicted passing time of the next passing area can be accurately obtained, the vehicles waiting in the next passing area can pass through the traffic intersection to the maximum extent, the average waiting time of the vehicles is reduced, and the condition of urban traffic road congestion is timely and effectively improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are specifically described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a flowchart of an automatic control method of a traffic signal lamp according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an automatic control system of a traffic signal lamp according to a second embodiment of the present invention.
Detailed Description
To further illustrate the technical measures and effects taken by the present invention to achieve the intended objects, embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Fig. 1 is a flowchart of a method for automatically controlling a traffic signal lamp according to a first embodiment of the present invention. As shown in fig. 1, the automatic control method of the traffic signal lamp includes:
step S11: and when the residual traffic time of the current traffic area is less than the threshold value, acquiring the traffic flow of the current traffic area and the traffic flow of the next traffic area.
Specifically, when the remaining transit time of the current transit zone is less than a threshold value, for example, 0.1 second, traffic flows of the current transit zone and the next transit zone are acquired, wherein the traffic flows may include, but are not limited to, the number of vehicles waiting in line to pass through the traffic intersection and/or the number of vehicles of the longest traffic flow.
Specifically, the threshold may be a pre-stored fixed value, may also be changed according to a modification instruction, and the like.
Specifically, the number of vehicles of the longest traffic flow may be the number of vehicles on the lane with the most vehicles on the straight-ahead lane waiting in line, or the number of vehicles waiting in line to pass through the lane with the most vehicles on the traffic intersection.
Specifically, in an embodiment, the traffic flow information of the current traffic area and the traffic flow information of the next traffic area are obtained in real time according to image information sent by a monitoring camera and/or positioning information sent by a positioning system.
Step S12: and judging whether the traffic flow of the current traffic area is larger than that of the next traffic area.
Specifically, the greater the number of vehicles queued up represents a higher traffic flow, so the number of vehicles queued up to pass through the traffic intersection for the current traffic zone and the next traffic zone are compared. In another embodiment, the number of vehicles in the longest flow that are queued up for the current traffic zone and the next traffic zone may also be compared.
If the traffic flow of the current traffic zone is larger than that of the next traffic zone, the method goes to step S13: and increasing the passing time of the current passing area.
Specifically, in one embodiment, the number of vehicles queued to pass through the traffic intersection in the current traffic zone is greater than the number of vehicles queued to pass through the traffic intersection in the next traffic zone, and it is desirable to preferentially reduce the number of vehicles queued to pass through the traffic intersection in the current traffic zone, so as to increase the passage time of the current traffic zone, thereby reducing the number of vehicles queued to pass through the traffic intersection in the current traffic zone, thereby improving road utilization, and reducing the number of vehicles waiting to pass through the traffic intersection, thereby avoiding a congestion condition caused by excessive vehicles at the traffic intersection.
Specifically, if the traffic flow in the current traffic zone is less than or equal to the traffic flow in the next traffic zone, step S14 is entered: and acquiring historical average passing time of the vehicles passing through the traffic intersection in the current time period.
Specifically, the historical passing speed of the vehicle at the traffic intersection in the current time period is obtained, and the historical average passing time of the vehicle passing through the traffic intersection in the current time period is obtained according to the historical passing speed.
Specifically, in one embodiment, in executing step S13: before increasing the passing time length of the current passing area, whether the number of times of increasing the passing time length of the current passing area exceeds the preset number of times needs to be judged. If the preset number of times is not exceeded, the process proceeds to step S13: and increasing the passing time length of the current passing area, wherein the increased passing time length can be a preset fixed value.
If the number of times exceeds the preset number, the method directly enters step S14, and the historical average passing time of the vehicles passing through the traffic intersection in the current time period is obtained. Specifically, increasing the passage duration of the current passage area for many times may make the waiting duration of the vehicle in the next passage area too long, and may bring bad experience to the owner of the vehicle in the next passage area, so it is necessary to set a preset number of times to make step S13: and increasing the passing time of the current passing area to the maximum, repeatedly executing the preset times, and directly entering the step S14 after the preset times are exceeded, wherein the historical average passing time of the vehicles passing through the traffic intersection in the current time period is obtained.
Step S15: and acquiring the predicted passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing through the traffic intersection in the current time period, and setting the passing time of the next passing area as the predicted passing time when the residual passing time of the current passing area is zero.
Specifically, in one embodiment, the traffic flow information further includes the number of people waiting to pass through the traffic intersection. Step S15: acquiring the predicted passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing through the traffic intersection in the current time period, and setting the passing time of the next passing area as the predicted passing time when the residual passing time of the current passing area is zero comprises the following steps: and obtaining the initial passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing through the traffic intersection in the current time period, and adjusting the initial passing time according to the number of pedestrians at the traffic intersection of the next passing area to obtain the predicted passing time. Specifically, when the time of the pedestrian passing through the traffic intersection is longer than the time of the vehicle passing through the traffic intersection, the passing time of the pedestrian passing through the traffic intersection is adopted as the predicted passing time of the next passing area.
Specifically, before step S11, or during step S11 to step S15, or after step S15, the method for automatically controlling a traffic signal may further include: and acquiring the road condition information in front of the current traffic area to judge whether a traffic accident occurs on the road in front of the current traffic area.
Specifically, whether a traffic accident occurs is judged through a lane where traffic flows smoothly. If a traffic accident occurs, the number of lanes for vehicles to pass through is reduced, and the passing time of the current passing area needs to be prolonged so as to reduce the number of vehicles in the current passing area, thereby avoiding the possibility of congestion caused by the traffic accident.
According to the automatic control method of the traffic signal lamp provided by the embodiment, the traffic flow of the current traffic zone and the traffic flow of the next traffic zone are compared, and the traffic is preferentially carried out in the area with the large traffic flow, so that the road utilization rate is improved, the number of vehicles waiting to pass through the traffic intersection is reduced, and the congestion condition caused by too many vehicles at the traffic intersection is avoided. When the traffic flow of the next traffic zone is higher or the waiting time is too long, the predicted traffic time of the next traffic zone is determined according to the traffic flow of the next traffic zone and the historical average time of vehicles passing through the traffic intersection, the predicted traffic time of the next traffic zone can be accurately obtained according to the historical average time, and the number of vehicles waiting in the next traffic zone can be enabled to pass through the traffic intersection to the maximum extent.
Fig. 2 is a schematic structural diagram of an automatic control system for a traffic signal lamp according to a second embodiment of the present invention. As shown in fig. 2, the automatic control system 100 for a traffic signal lamp includes: a processor 101 and a controller 102.
Specifically, in this embodiment, the processor 101 is configured to, when the transit time of the current transit area is less than a threshold value, acquire traffic flow information of the current transit area and the next transit area, where the traffic flow information includes: the method comprises the steps of waiting in line for the number of vehicles passing through a traffic intersection and/or the number of vehicles of the longest traffic flow, sending information for increasing the passing time of the current passing area to a controller 102 when the traffic flow of the current passing area is larger than the traffic flow of the next passing area, enabling the controller 102 to control a traffic signal lamp to increase the passing time of the current passing area, obtaining the historical average passing time of the vehicles passing through the traffic intersection in the current time period when the traffic flow of the current passing area is smaller than or equal to the traffic flow of the next passing area, sending the predicted passing time to the controller 102 after obtaining the predicted passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing through the traffic intersection in the current time period, and enabling the controller 102 to control the passing time of the traffic signal lamp in the current passing area to be zero, and setting the passing time of the next passing area as the predicted passing time.
Specifically, the processor 101 may be a cloud server platform or a central processing unit integrated with the controller 102 and disposed on the same circuit board.
In the automatic control system of the traffic signal lamp provided by this embodiment, the processor 101 compares the traffic flow of the current traffic area and the traffic flow of the next traffic area, and sends the traffic flow to the controller 102 for passing in the area with the higher priority traffic flow, so as to improve the road utilization rate, reduce the number of vehicles waiting to pass through the traffic intersection, and avoid the congestion condition caused by too many vehicles at the traffic intersection. When the traffic flow of the next traffic zone is higher or the waiting time is too long, the processor 101 determines the predicted traffic time of the next traffic zone according to the traffic flow of the next traffic zone and the historical average time of the vehicles passing through the traffic intersection, and can accurately obtain the predicted traffic time of the next traffic zone according to the historical average time. The controller 102 controls the traffic signal lamp according to the predicted passage time so that the number of vehicles waiting in the next passage area all passes through the traffic intersection.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, the above embodiments are exemplary, and are not to be construed as limiting the present invention, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical idea of the present invention, and these simple modifications all belong to the protection scope of the present invention.
Claims (8)
1. An automatic control method of a traffic signal lamp, characterized in that the automatic control method of the traffic signal lamp comprises:
when the remaining passing time of the current passing area is less than a threshold value, acquiring traffic flows of the current passing area and a next passing area, wherein the traffic flows comprise: the number of vehicles waiting in line for passing through the traffic intersection and/or the number of vehicles in the longest traffic stream;
judging whether the traffic flow of the current traffic area is larger than the traffic flow of the next traffic area;
if the traffic flow of the current passing area is larger than that of the next passing area, and the number of times of increasing the passing time of the current passing area does not exceed the preset number of times, increasing the passing time of the current passing area;
if the traffic flow of the current traffic zone is less than or equal to the traffic flow of the next traffic zone, or the number of times of increasing the traffic time of the current traffic zone exceeds the preset number of times, acquiring the historical average traffic time of the vehicles passing through the traffic intersection in the current time period;
and acquiring the predicted passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing the traffic intersection in the current time period, and setting the passing time of the next passing area as the predicted passing time when the residual passing time of the current passing area is zero.
2. The automatic control method of traffic signal lamp according to claim 1, wherein the step of acquiring traffic flow information of the current passing area and the next passing area when the remaining passing time of the current passing area is less than the threshold value comprises:
and acquiring traffic flow information of the current traffic area and the next traffic area in real time according to image information sent by a monitoring camera and/or positioning information sent by a positioning system.
3. The automatic control method of traffic signal lamp according to claim 1, wherein the step of judging whether the traffic flow of the current passing area is greater than the traffic flow of the next passing area includes:
and comparing the number of the vehicles waiting to pass through the traffic intersection in the current passing area with the number of the vehicles waiting to pass through the traffic intersection in the next passing area.
4. The automatic control method of traffic signal lamp according to claim 1, wherein if the traffic flow of the current passing area is greater than the traffic flow of the next passing area, the step of increasing the passing time period of the current passing area comprises:
judging whether the number of times of increasing the passing time of the current passing area exceeds a preset number of times or not;
if the number of times exceeds the preset number, entering a step of acquiring historical average passing time of the vehicle passing through the traffic intersection in the current time period;
and if the number of times does not exceed the preset number of times, increasing the passing time of the current passing area, wherein the increased passing time is a preset fixed value.
5. The automatic control method of traffic signal lights according to claim 1, characterized in that the traffic flow information further includes the number of pedestrians waiting to pass through the traffic intersection;
acquiring the predicted passing time of the next passing area according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing the traffic intersection in the current time period, and setting the passing time of the next passing area as the predicted passing time when the passing time of the current passing area is zero:
acquiring the initial passing time length of the next passing area according to the traffic flow information of the next passing area and the historical average passing time length of the vehicles passing through the traffic intersection in the current time period;
and adjusting the initial passing time length according to the number of pedestrians at the traffic intersection of the next passing area to obtain the predicted passing time length.
6. The automatic control method of a traffic signal light according to claim 1, characterized in that the automatic control method of a traffic signal light further comprises:
acquiring road condition information in front of the current traffic area to judge whether a traffic accident occurs on a road in front of the current traffic area;
and if the traffic accident happens, prolonging the passing time of the current passing area.
7. An automatic control system of a traffic signal lamp is characterized by comprising a processor and a controller;
the processor is configured to acquire traffic flow information of a current traffic zone and a next traffic zone when a traffic time of the current traffic zone is less than a threshold, where the traffic flow information includes: the number of vehicles waiting in line for passing through the traffic intersection and/or the number of vehicles in the longest traffic flow;
when the traffic flow of the current passing area is larger than that of the next passing area and the number of times of increasing the passing time of the current passing area does not exceed the preset number of times, sending information of increasing the passing time of the current passing area to the controller, so that the controller controls the traffic signal lamp to increase the passing time of the current passing area;
when the traffic flow of the current traffic zone is less than or equal to the traffic flow of the next traffic zone or the times of increasing the traffic time of the current traffic zone exceed the preset times, acquiring historical average traffic time of vehicles passing the traffic intersection in the current time period;
and after the predicted passing time of the next passing area is obtained according to the traffic flow information of the next passing area and the historical average passing time of the vehicles passing through the traffic intersection in the current time period, the predicted passing time is sent to the controller, so that the controller controls the traffic signal lamp when the passing time of the current passing area is zero, and the passing time of the next passing area is set as the predicted passing time.
8. The automatic control system of a traffic signal as recited in claim 7, wherein the processor is a server.
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| CN112767719A (en) * | 2021-02-23 | 2021-05-07 | 上海慈航建设发展有限公司 | Efficient traffic signal lamp control system and control method |
| CN113781784B (en) * | 2021-11-09 | 2022-02-11 | 深圳市奥新科技有限公司 | Intelligent traffic light and control method thereof |
| CN114973701A (en) * | 2022-07-25 | 2022-08-30 | 山东领军智能交通科技有限公司 | Intelligent control method and system for buried traffic signal lamp |
| CN115440063B (en) * | 2022-09-01 | 2023-12-05 | 的卢技术有限公司 | Traffic signal lamp control method, device, computer equipment and storage medium |
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