Signal lamp duration control method and system based on regional traffic flow information

Abstract

The invention discloses a signal lamp duration control method and system based on regional traffic flow information, and the method comprises the steps: enabling each signal lamp in a to-be-controlled region to obtain the vehicle information in a corresponding road segment in real time, all the signal lamps synchronously send the acquired vehicle information to the central control system; the central control system judges whether a congested road section exists in the to-be-controlled area according to the vehicle information of all the signal lamps in the to-be-controlled area, if the congested road section exists, the central control system generates an area signal lamp control signal according to the vehicle information of all the signal lamps in the to-be-controlled area and the relationship among the signal lamps, and sends the area signal lamp control signal to the to-be-controlled area; the regional signal lamp control signal is sent to each signal lamp and a navigation system; and the navigation system updates navigation route information according to the regional signal lamp control signal and transmits the updated navigation route information to a navigated vehicle, and meanwhile, each signal lamp performs signal switching according to the regional signal lamp control signal.

Description

Technical Field

[0001] The present application relates to the technical field of traffic signal control, and in particular to a method and system for controlling the duration of a traffic light based on regional vehicle flow information. Background Art

[0002] The function of traffic lights is to direct vehicles on different roads to pass reasonably and safely, but traditional traffic lights are difficult to interact with vehicles and can only be controlled according to set rules, resulting in unreasonable changes in the duration of traditional traffic lights, which will cause traffic congestion to a certain extent. Although there are methods in the prior art that can dynamically adjust the duration of traffic lights, they can only simply predict the passage time of vehicles through the number of vehicles obtained by a camera, and then dynamically change the duration of a corresponding traffic light according to the predicted time. This method does not form an interaction between traffic lights and vehicles, and there is no interaction between traffic lights, which will waste a lot of useful information and is not conducive to the route update of the navigation system. Summary of the invention

[0003] The present application provides a signal light duration control method and system based on regional traffic flow information, which solves the problem in the prior art that traffic lights cannot update the signal light duration of the entire area in real time according to vehicle condition information. The updated signal light duration can also be updated to the navigation system in real time to further alleviate road vehicle congestion.

[0004] The specific technical solutions are as follows:

[0005] In a first aspect, an embodiment of the present application provides a method for controlling the duration of a signal light based on regional vehicle flow information, including:

[0006] Each signal light in the area to be controlled obtains the vehicle information in the road section to which it belongs in real time, and all the signal lights synchronously send the vehicle information they obtain to the central control system;

[0007] The central control system determines whether there is a congested road section in the area to be controlled according to the vehicle information of all the signal lights in the area to be controlled. If there is a congested road section, the central control system generates a regional signal light control signal according to the vehicle information of all the signal lights in the area to be controlled and the relationship between the signal lights, and sends the regional signal light control signal to each signal light and the navigation system;

[0008] The navigation system updates navigation route information according to the regional signal light control signal, and transmits the updated navigation route information to the vehicle being navigated. Meanwhile, each of the signal lights performs signal switching according to the regional signal light control signal.

[0009] In some embodiments of the present application, each traffic light in the to-be-controlled area respectively obtains vehicle information in real time within the road section to which it belongs, specifically including:

[0010] Each of the traffic lights respectively obtains the vehicle position information of all vehicles in the road section to which it belongs in real time, and calculates the number of vehicles in the road section to which each of the traffic lights belongs based on the vehicle position information, and generates the vehicle information of the traffic light based on all the vehicle position information and the number of vehicles in the road section.

[0011] In some embodiments of the present application, the method for the signal light to obtain the vehicle position information is any one of camera target detection and buried sensor monitoring, or a combination of both.

[0012] In some embodiments of the present application, the central control system determines whether there is a congested road section in the area to be controlled according to the vehicle information of all the traffic lights in the area to be controlled, specifically including:

[0013] The central control system determines whether there is a congested section in the area to be controlled according to the number of vehicles in the section to which each signal light belongs;

[0014] If the number of vehicles on a road section to which a certain signal light belongs in the to-be-controlled area is greater than a preset traffic flow threshold, the road section to which the signal light belongs is determined to be a congested road section;

[0015] If the number of vehicles on the road section to which all the traffic lights in the area to be controlled belong is not greater than the preset traffic flow threshold, it is determined that there is no congested road section in the area to be controlled.

[0016] In some embodiments of the present application, the central control system generates a regional signal light control signal according to the vehicle information of all the signal lights in the area to be controlled and the relationship between the signal lights, specifically including:

[0017] The central control system calculates the vehicle passing time of all the congested sections in the to-be-controlled area according to the vehicle information of all the traffic lights in the to-be-controlled area and the relationship between the traffic lights, and sets the green light passing time of the corresponding traffic lights according to the vehicle passing time of each congested section;

[0018] The central control system calculates the time T for the congested vehicles in each congested road section to reach the next downstream road section based on the vehicle passage time and the green light passage time of the congested road section, and sets the green light passage time of the signal light corresponding to the next downstream road section of the congested road section after T time, then calculates the time S for the congested vehicles to reach the next two sections downstream of the congested road section, and sets the green light passage time of the signal light corresponding to the next two sections downstream of the congested road section after S time, and so on, until the congested vehicles leave the area to be controlled.

[0019] In some embodiments of the present application, setting the green light duration of the corresponding signal light according to the vehicle passing time of each congested road section specifically includes:

[0020] The central control system determines whether the vehicle passage time of each congested road section is greater than a preset maximum passage threshold. If not, the vehicle passage time is set to the green light passage time of the traffic light corresponding to the congested road section. If greater, the preset maximum passage threshold is set to the green light passage time of the traffic light corresponding to the congested road section.

[0021] In some embodiments of the present application, setting the green light duration of the corresponding signal light according to the vehicle passing time of each congested road section specifically includes:

[0022] The central control system determines whether the vehicle travel time of each congested road section is greater than a preset first travel threshold;

[0023] If the vehicle passing time is not greater than the preset first passing threshold, the preset first passing threshold is set to the green light passing time of the signal light corresponding to the congested road section; if the vehicle passing time is greater than the preset first passing threshold, it is determined whether the vehicle passing time is greater than a preset second passing threshold;

[0024] If the vehicle passing time is not greater than the preset second passing threshold, the preset second passing threshold is set to the green light passing time of the traffic light corresponding to the congested road section; if the vehicle passing time is greater than the preset second passing threshold, the preset third passing threshold is set to the green light passing time of the traffic light corresponding to the congested road section.

[0025] In some embodiments of the present application, it also includes:

[0026] If there is no congested road section in the area to be controlled, the central control system controls all the traffic lights in the area to be controlled to switch signals according to the initial traffic light duration.

[0027] In a second aspect, an embodiment of the present application provides a signal light duration control system based on regional vehicle flow information, including: a central control system, a navigation system, and a plurality of signal light control modules;

[0028] Each of the signal light control modules is used to obtain in real time the vehicle information in the road section to which the corresponding signal light belongs in the area to be controlled, and send the obtained vehicle information to the central control system; wherein all the signal light control modules in the area to be controlled synchronously send the obtained vehicle information to the central control system;

[0029] The central control system is used to determine whether there is a congested road section in the area to be controlled according to the vehicle information of all the signal lights in the area to be controlled, and if so, to generate a regional signal light control signal according to the vehicle information of all the signal lights in the area to be controlled and the relationship between the signal lights, and send the regional signal light control signal to the signal light control module corresponding to each signal light and the navigation system;

[0030] The navigation system is used to update navigation route information according to the regional signal light control signal, and transmit the updated navigation route information to the vehicle being navigated;

[0031] Each of the signal light control modules is further used to perform signal switching on the signal light corresponding thereto according to the regional signal light control signal sent by the central control system.

[0032] In a third aspect, an embodiment of the present application provides a signal light duration control device based on regional vehicle flow information, comprising: a processor, a memory, and a computer program stored in the memory. When the processor executes the computer program, it executes the signal light duration control method based on regional vehicle flow information as described in the first aspect.

[0033] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for controlling the duration of a traffic light based on regional vehicle flow information as described in the first aspect is implemented.

[0034] The beneficial effects of the embodiments of the present application are as follows:

[0035] The central control system can simultaneously command all traffic lights in the controlled area, thus achieving interaction between traffic lights and solving the problem in the prior art that only one traffic light can be regulated individually and that traffic lights cannot interact with each other, thus wasting a lot of useful information. At the same time, the navigation system is introduced to enable vehicles to obtain the latest navigation routes in real time, further alleviating traffic pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A flowchart of a method for controlling the duration of a signal light based on regional vehicle flow information provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of a straight road provided in an embodiment of the present application;

[0039] Figure 3 A schematic block diagram of a signal light duration control system based on regional vehicle flow information provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The terms "including" and "having" in the embodiments of the present application and the accompanying drawings and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0042] The embodiment of the present application discloses a traffic light duration control method based on regional vehicle flow information, which can adjust the duration of traffic lights in the entire area, realize the interaction between traffic lights and between traffic lights and vehicles, and effectively alleviate traffic congestion in the entire area. Detailed descriptions are given below.

[0043] Figure 1 A signal light duration control method based on regional vehicle flow information provided in accordance with an embodiment of the present application is shown. Figure 1 As shown, the signal light duration control method includes the following steps:

[0044] Step S110: Each traffic light in the area to be controlled obtains the vehicle information in its respective road section in real time, and all traffic lights synchronously send the obtained vehicle information to the central control system.

[0045] In the embodiment of the present application, the area to be controlled refers to a section of road for one-way travel, for example, a route from the East Fourth Ring Road to the West Fourth Ring Road of a city, and the traffic lights in the area to be cleared refer to the traffic lights that can be encountered when traveling in one direction on this route, and the section to which the traffic light belongs refers to the section of road controlled by the traffic light, that is, the section between the traffic light and its upstream traffic light.

[0046] The vehicle information in this application mainly refers to the number of vehicles in the road section to which it belongs. Specifically, each traffic light in the area to be controlled obtains the vehicle position information of all vehicles in the road section to which it belongs in real time, and calculates the number of road section vehicles in the road section to which each traffic light belongs based on the vehicle position information, and generates the vehicle information of the traffic light based on all vehicle position information and the number of road section vehicles. In the specific implementation process, the traffic light can obtain the vehicle coordinates (i.e., vehicle position information) of the vehicles in the road section to which it belongs through any one or more combinations of methods such as camera target detection and buried sensor monitoring, and then counts different vehicle coordinates to obtain the number of road section vehicles in the road section to which the traffic light belongs.

[0047] Among them, each traffic light synchronously transmits the vehicle information it obtains to the central control system, that is, each traffic light in the area to be controlled transmits the vehicle information it obtains to the central control system at the same time, so that the information obtained by the central control system each time is synchronized, which is beneficial to the adjustment of the traffic light duration in the entire area.

[0048] Step S120: The central control system determines whether there is a congested section in the area to be controlled based on the vehicle information of all traffic lights in the area to be controlled.

[0049] In the embodiment of the present application, before adjusting the traffic light duration, the signal light duration control method needs to determine whether there is a congested section in the area to be controlled. If there is a congested section, it proceeds from step S120 to step S130, and adjusts the planned traffic light duration according to the relationship between the traffic lights and the number of vehicles on the road section in the vehicle information. If there is no congested section, it proceeds from step S120 to step S150, maintains the initial state, and does not adjust the traffic light duration of each traffic light in the area. By determining whether there is a congested section, unnecessary processing of the central control system can be reduced, thereby improving processing efficiency.

[0050] In a specific embodiment, the central control system determines whether there is a congested section in the area to be controlled based on the number of road section vehicles in the road section to which each signal light belongs. If the number of road section vehicles in a section to which a certain signal light in the area to be controlled belongs is greater than the preset traffic flow threshold, the section to which the signal light belongs is determined to be a congested section. If the number of road section vehicles in the sections to which all signal lights in the area to be controlled belong is not greater than the preset traffic flow threshold, it is determined that there is no congested section in the area to be controlled. In other words, the signal light duration control method of the present application will only adjust the traffic light duration of each signal light in the area when it detects that the number of vehicles is greater than a certain number (i.e., the preset traffic flow threshold) and it is determined to be congested, otherwise it will not be adjusted. Furthermore, the preset traffic flow threshold can be taken according to the road type, road width and road length of the area to be controlled. In some specific implementation processes, the preset traffic flow threshold is positively correlated with the road type, road width and road length of the area to be controlled.

[0051] Step S130: According to the vehicle information of all the signal lights in the area to be controlled and the relationship between the signal lights, the central control system generates a regional signal light control signal, and sends the regional signal light control signal to each signal light and the navigation system.

[0052] When there is at least one congested road section in the area to be controlled, after the central control system obtains the vehicle information of each signal light, it will adjust the planned traffic light duration according to the relationship between the signal lights and the number of vehicles on the road section in the vehicle information. Specifically, the central control system calculates the vehicle travel time of all congested road sections in the area to be controlled according to the vehicle information of all signal lights in the area to be controlled and the relationship between each signal light, and sets the green light travel duration of the corresponding signal light according to the vehicle travel time of each congested road section; the central control system calculates the time T when the congested vehicles in each congested road section arrive at the next downstream road section according to the vehicle travel time and green light travel duration of the congested road section, and sets the green light travel duration of the signal light corresponding to the next downstream road section of the congested road section after T time, and then calculates the time S when the congested vehicles arrive at the next two downstream roads of the congested road section, and sets the green light travel duration of the signal light corresponding to the next two downstream roads of the congested road section after S time, and so on, until the congested vehicles leave the area to be controlled. It should be noted and understood that the above-mentioned "vehicle travel time of all congested sections in the area to be controlled" specifically refers to the travel time required for vehicles to leave the congested section to recover from a congested state to a non-congested state.

[0053] For ease of understanding, we assume that Figure 2In the straight road shown, there are only traffic lights 1 and 2 in the controlled area. After the traffic light transmits vehicle information to the central control system, the central control system will first increase the vehicle passing time of the first vehicle at traffic light 1 accordingly, and then calculate the time t when the first vehicle reaches traffic light 2. After time t, the vehicle passing time of the first vehicle at traffic light 2 will also be increased accordingly. By analogy, when it is detected that there is no congestion in the road section to which traffic light 1 belongs, the central control system adjusts the traffic light duration of traffic lights 1 and 2 to the initial traffic light duration. When encountering a turning road condition, multiple traffic lights may be involved, but the method for updating the traffic light duration is similar to that of the straight road mentioned above, and will not be repeated here.

[0054] In addition, while increasing the vehicle travel time, the travel time of pedestrians and the remaining lanes at the intersection must also be considered. The vehicle travel time in that one direction cannot be increased indefinitely. An upper limit value (i.e. the maximum vehicle travel time in that one direction) and a lower limit value (i.e. the minimum travel time for pedestrians and the remaining lanes at the intersection) can be set according to the specific conditions of each area.

[0055] In some embodiments, the signal light duration control method sets a preset maximum pass threshold, i.e., the maximum vehicle pass time of the signal light, and adjusts the signal light duration according to the pass time required for the vehicle to leave the congested road section to return to a non-congested state (i.e., the vehicle pass time of the congested road section). In detail, the central control system determines whether the vehicle pass time of each congested road section is greater than the preset maximum pass threshold. If not, the vehicle pass time is set to the green light pass time of the signal light corresponding to the congested road section. If greater, the preset maximum pass threshold is set to the green light pass time of the signal light corresponding to the congested road section.

[0056] In other embodiments, the signal light duration control method sets multiple travel duration values, specifically including a preset first travel threshold, a preset second travel threshold, and a preset third travel threshold, and adjusts the signal light duration according to the range of vehicle travel time of the congested road section. In detail, the central control system determines whether the vehicle travel time of each congested road section is greater than the preset first travel threshold; if the vehicle travel time is not greater than the preset first travel threshold, the preset first travel threshold is set as the green light travel time of the signal light corresponding to the congested road section; if the vehicle travel time is greater than the preset first travel threshold, it is determined whether the vehicle travel time is greater than the preset second travel threshold; if the vehicle travel time is not greater than the preset second travel threshold, the preset second travel threshold is set as the green light travel time of the signal light corresponding to the congested road section; if the vehicle travel time is greater than the preset second travel threshold, the preset third travel threshold is set as the green light travel time of the signal light corresponding to the congested road section.

[0057] Step S140: The navigation system updates the navigation route information according to the regional signal light control signal, and transmits the updated navigation route information to the vehicle being navigated. Meanwhile, each signal light switches the signal according to the regional signal light control signal.

[0058] In an embodiment of the present application, after the central control system updates the traffic light duration, it updates the traffic light duration to the navigation system, and then the navigation system further updates the navigation route accordingly. After updating the route, the updated route information is transmitted to the vehicle being navigated, thereby intelligently guiding the vehicle to leave the congested section, thereby further alleviating the pressure of congestion.

[0059] Step S150: The central control system controls all traffic lights in the area to be controlled to switch signals according to the initial traffic light duration.

[0060] When there is no congested road section in the area to be controlled, the central control system will not adjust the traffic light duration of any traffic light, so that each traffic light can maintain the initial traffic light duration.

[0061] Corresponding to the above method embodiment, the present application embodiment also provides a signal light duration control system based on regional vehicle flow information, which is used to execute the signal light duration control method steps based on regional vehicle flow information in the above embodiment. Figure 3 As shown, the signal light duration control system based on regional vehicle flow information includes: a central control system 210 , a navigation system 220 and a plurality of signal light control modules 230 .

[0062] Specifically, each signal light control module 230 is used to obtain vehicle information in real time in the road section to which the corresponding signal light belongs in the area to be controlled, and send the obtained vehicle information to the central control system 210. Among them, all signal light control modules 230 in the area to be controlled synchronously send the obtained vehicle information to the central control system 210.

[0063] The central control system 210 is used to determine whether there is a congested section in the area to be controlled based on the vehicle information of all signal lights in the area to be controlled. If so, a regional signal light control signal is generated based on the vehicle information of all signal lights in the area to be controlled and the relationship between each signal light, and the regional signal light control signal is sent to the signal light control module 230 and the navigation system 220 corresponding to each signal light.

[0064] The navigation system 220 is used to update the navigation route information according to the regional signal light control signal, and transmit the updated navigation route information to the vehicle being navigated.

[0065] Each signal light control module 230 is further configured to perform signal switching on a corresponding signal light according to a regional signal light control signal sent by the central control system 210 .

[0066] It should be noted that the signal light duration control system based on regional traffic flow information provided in the embodiment of the present application is based on the same concept as the signal light duration control method embodiment based on regional traffic flow information in the present application, and the technical effect it brings is the same as the signal light duration control method embodiment based on regional traffic flow information in the present application. Therefore, the specific content can be found in the description in the signal light duration control method embodiment based on regional traffic flow information in the present application, and will not be repeated here.

[0067] The present application also provides a signal light duration control device based on regional vehicle flow information, including: a processor, a memory, and a computer program stored in the memory. When the processor executes the computer program, the steps of the signal light duration control method based on regional vehicle flow information described in the above embodiment are implemented.

[0068] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc.

[0069] The memory may be an internal storage unit of the signal light duration control device based on regional vehicle flow information, for example, a hard disk or memory of the signal light duration control device based on regional vehicle flow information. The memory may also be an external storage device of the signal light duration control device based on regional vehicle flow information, for example, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital card (Secure Digital Card, SD card for short), a flash card (Flash Card), etc. equipped on the signal light duration control device based on regional vehicle flow information. Furthermore, the memory may also include both an internal storage unit of the signal light duration control device based on regional vehicle flow information and an external storage device. The memory is used to store computer programs and other programs or data required by the signal light duration control device based on regional vehicle flow information. The memory may also be used to temporarily store data that has been output or is to be output.

[0070] In the above embodiments, the description of each embodiment has different emphases. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0071] Those skilled in the art will appreciate that the modules and algorithm steps of the various embodiments described in conjunction with the embodiments disclosed in this specification can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but this implementation should not be considered to exceed the scope of the present invention.

[0072] In addition, the embodiment of the present application further provides a computer-readable storage medium, which stores a computer program, and the computer program can be executed by a processor to complete the signal light duration control method based on regional vehicle flow information as described in the above embodiment. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), etc.

[0073] In summary, the present application discloses a signal light duration control method and system based on regional vehicle flow information, which simultaneously commands all signal lights in the area to be controlled through a central control system, realizes the interaction between signal lights, and solves the problem in the prior art that only one signal light can be controlled individually and the signal lights cannot interact with each other, thus wasting a lot of useful information. At the same time, a navigation system is introduced to enable vehicles to obtain the latest navigation routes in real time, further alleviating traffic pressure.

[0074] Those skilled in the art can understand that the accompanying drawings are only schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily required to implement the present invention.

[0075] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed accordingly and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined into one module, or can be further divided into multiple sub-modules.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A signal light duration control method based on regional vehicle flow information, characterized in that: include: Each signal light in the area to be controlled obtains the vehicle information in the road section to which it belongs in real time, and all the signal lights synchronously send the vehicle information they obtain to the central control system; The central control system determines whether there is a congested road section in the area to be controlled according to the vehicle information of all the signal lights in the area to be controlled. If there is a congested road section, the central control system generates a regional signal light control signal according to the vehicle information of all the signal lights in the area to be controlled and the relationship between the signal lights, and sends the regional signal light control signal to each signal light and the navigation system; The navigation system updates navigation route information according to the regional signal light control signal, and transmits the updated navigation route information to the vehicle being navigated. Meanwhile, each of the signal lights performs signal switching according to the regional signal light control signal.

2. The signal light duration control method based on regional vehicle flow information according to claim 1 is characterized in that: Each traffic light in the area to be controlled obtains vehicle information in real time on the road section to which it belongs, specifically including: Each of the traffic lights respectively obtains the vehicle position information of all vehicles in the road section to which it belongs in real time, and calculates the number of vehicles in the road section to which each of the traffic lights belongs based on the vehicle position information, and generates the vehicle information of the traffic light based on all the vehicle position information and the number of vehicles in the road section.

3. The signal light duration control method based on regional vehicle flow information according to claim 2 is characterized in that: The method for the signal light to obtain the vehicle position information is any one of camera target detection and buried sensor monitoring or a combination of the two.

4. The signal light duration control method based on regional vehicle flow information according to claim 2 is characterized in that: The central control system determines whether there is a congested road section in the area to be controlled according to the vehicle information of all the signal lights in the area to be controlled, specifically including: The central control system determines whether there is a congested section in the area to be controlled according to the number of vehicles in the section to which each signal light belongs; If the number of vehicles on a road section to which a certain signal light belongs in the to-be-controlled area is greater than a preset traffic flow threshold, the road section to which the signal light belongs is determined to be a congested road section; If the number of vehicles on the road section to which all the traffic lights in the area to be controlled belong is not greater than the preset traffic flow threshold, it is determined that there is no congested road section in the area to be controlled.

5. The signal light duration control method based on regional vehicle flow information according to claim 1, characterized in that: The central control system generates a regional signal light control signal according to the vehicle information of all the signal lights in the area to be controlled and the relationship between the signal lights, specifically including: The central control system calculates the vehicle passing time of all the congested sections in the to-be-controlled area according to the vehicle information of all the traffic lights in the to-be-controlled area and the relationship between the traffic lights, and sets the green light passing time of the corresponding traffic lights according to the vehicle passing time of each congested section; The central control system calculates the time T for the congested vehicles in each congested road section to reach the next downstream road section based on the vehicle passage time and the green light passage time of the congested road section, and sets the green light passage time of the signal light corresponding to the next downstream road section of the congested road section after T time, then calculates the time S for the congested vehicles to reach the next two sections downstream of the congested road section, and sets the green light passage time of the signal light corresponding to the next two sections downstream of the congested road section after S time, and so on, until the congested vehicles leave the area to be controlled.

6. The signal light duration control method based on regional vehicle flow information according to claim 5 is characterized in that: The step of setting the green light duration of the corresponding signal light according to the vehicle passing time of each congested road section specifically includes: The central control system determines whether the vehicle passage time of each congested road section is greater than a preset maximum passage threshold. If not, the vehicle passage time is set to the green light passage time of the traffic light corresponding to the congested road section. If greater, the preset maximum passage threshold is set to the green light passage time of the traffic light corresponding to the congested road section.

7. The signal light duration control method based on regional vehicle flow information according to claim 5, characterized in that: The step of setting the green light duration of the corresponding signal light according to the vehicle passing time of each congested road section specifically includes: The central control system determines whether the vehicle travel time of each congested road section is greater than a preset first travel threshold; If the vehicle passing time is not greater than the preset first passing threshold, the preset first passing threshold is set to the green light passing time of the signal light corresponding to the congested road section; if the vehicle passing time is greater than the preset first passing threshold, it is determined whether the vehicle passing time is greater than a preset second passing threshold; If the vehicle passing time is not greater than the preset second passing threshold, the preset second passing threshold is set to the green light passing time of the traffic light corresponding to the congested road section; if the vehicle passing time is greater than the preset second passing threshold, the preset third passing threshold is set to the green light passing time of the traffic light corresponding to the congested road section.

8. The signal light duration control method based on regional vehicle flow information according to claim 1, characterized in that: Also includes: If there is no congested road section in the area to be controlled, the central control system controls all the traffic lights in the area to be controlled to switch signals according to the initial traffic light duration.

9. A signal light duration control system based on regional vehicle flow information, characterized in that: include: Central control system, navigation system and several signal light control modules; Each of the signal light control modules is used to obtain in real time the vehicle information in the road section to which the corresponding signal light belongs in the area to be controlled, and send the obtained vehicle information to the central control system; wherein all the signal light control modules in the area to be controlled synchronously send the obtained vehicle information to the central control system; The central control system is used to determine whether there is a congested road section in the area to be controlled according to the vehicle information of all the signal lights in the area to be controlled, and if so, to generate a regional signal light control signal according to the vehicle information of all the signal lights in the area to be controlled and the relationship between the signal lights, and send the regional signal light control signal to the signal light control module corresponding to each signal light and the navigation system; The navigation system is used to update navigation route information according to the regional signal light control signal, and transmit the updated navigation route information to the vehicle being navigated; Each of the signal light control modules is further used to perform signal switching on the signal light corresponding thereto according to the regional signal light control signal sent by the central control system.

10. A signal light duration control device based on regional vehicle flow information, characterized in that: include: A processor, a memory, and a computer program stored in the memory, wherein when the processor executes the computer program, the signal light duration control method based on regional vehicle flow information as described in any one of claims 1-8 is executed.

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