CN110910643B - Traffic flow control method and device - Google Patents
Traffic flow control method and device Download PDFInfo
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- CN110910643B CN110910643B CN201911220032.1A CN201911220032A CN110910643B CN 110910643 B CN110910643 B CN 110910643B CN 201911220032 A CN201911220032 A CN 201911220032A CN 110910643 B CN110910643 B CN 110910643B
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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
- G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
- G08G1/0145—Measuring and analyzing of parameters relative to traffic conditions for specific applications for active traffic flow control
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- G—PHYSICS
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- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
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Abstract
The invention provides a traffic flow control method, a traffic flow control device, electronic equipment and a storage medium; the method comprises the following steps: monitoring a traffic jam area according to data of traffic flow; determining a buffer area for dredging traffic flow coming into the traffic jam area; and controlling a traffic signal device through which the traffic flow passes before reaching the traffic jam area to output a traffic control signal so as to guide the traffic flow into the buffer area and reach a target area of the traffic flow through the buffer area. By the method and the system, traffic jam can be effectively and quickly controlled.
Description
Technical Field
The invention relates to the technical field of intelligent traffic technologies and block chains, in particular to a traffic flow control method and device, electronic equipment and a storage medium.
Background
Artificial intelligence is a theory, method and technique and application system that uses a digital computer or a machine controlled by a digital computer to simulate, extend and expand human intelligence, perceive the environment, acquire knowledge and use the knowledge to obtain the best results. Artificial intelligence is now rapidly developing and widely used in various industries.
With the rapid development of the automobile industry, the quantity of automobiles in cities is increased dramatically, so that the phenomenon of traffic jam often occurs in urban roads. However, the management and control for traffic congestion in the related art has not been able to meet the actual demand.
Disclosure of Invention
The embodiment of the invention provides a traffic flow control method and device, electronic equipment and a storage medium, which can effectively and quickly control traffic jam.
The technical scheme of the embodiment of the invention is realized as follows:
the embodiment of the invention provides a traffic flow control method, which comprises the following steps:
monitoring a traffic jam area according to data of traffic flow;
determining a buffer area for dredging traffic flow coming into the traffic jam area;
controlling a traffic signal device through which the traffic flow passes before reaching the traffic congestion area to output a traffic control signal to guide the traffic flow into the buffer area, and
and reaching a target area of the traffic flow through the buffer area.
The embodiment of the invention provides a traffic flow control device, which comprises:
the monitoring module is used for monitoring a traffic jam area according to the data of the traffic flow;
the determining module is used for determining a buffer area for dredging the traffic flow which is about to enter the traffic jam area;
and the control module is used for controlling the traffic signal equipment through which the traffic flow passes before reaching the traffic jam area to output a traffic control signal so as to guide the traffic flow to enter the buffer area and reach a target area of the traffic flow through the buffer area.
In the scheme, the monitoring module is further used for acquiring the road section flow of each road in the area to be monitored in real time; when the road section flow of the road exceeds the corresponding road traffic capacity, determining the road as a crowded road; and when the number of the crowded roads in the area to be monitored exceeds a congestion number threshold value and/or when the proportion of the crowded roads in the area to be monitored exceeds a congestion proportion threshold value, determining the area to be monitored as a traffic congestion area.
In the above scheme, the traffic flow control device further includes: the dividing module is used for dividing the area governed by the traffic control equipment into a plurality of sub-areas according to at least one of the following modes: dividing the area governed by the traffic control equipment into a plurality of sub-areas according to an administrative area; and dividing the area governed by the traffic control equipment into a plurality of sub-areas according to the structure of the road network.
In the above scheme, the traffic flow control device further includes: a region determining module, configured to determine the sub-region satisfying at least one of the following conditions as a region to be monitored: the occurring traffic volume exceeds the occurring traffic volume threshold; the attraction traffic volume exceeds an attraction traffic volume threshold; broken-gear type connection exists between the included roads in different levels; the parking berths provided are unable to meet the parking requirements of the traffic flow entering the sub-area.
In the above scheme, the determining module is further configured to determine a road section flow and a road traffic capacity of each road in the traffic congestion area, and a road section flow and a road traffic capacity of each road in the target area; determining the buffer area according to the road section flow and the road traffic capacity of each road in the traffic jam area, and the road section flow and the road traffic capacity of each road in the target area; wherein the buffer area is respectively connected with the traffic jam area and the target area.
In the above scheme, the determining module is further configured to determine a ratio of the road traffic capacity of each road in the traffic jam area to the road section flow as a road ratio of the traffic jam area; determining the ratio of the road traffic capacity and the road section flow of each road in the target area as the road ratio of the target area; determining a road ratio which is greater than the road ratio of the traffic jam area and less than the road ratio of the target area as a target road ratio; determining an area including a road reaching the target road ratio as the buffer area.
In the above scheme, the control module is further configured to obtain a road section flow and a road traffic capacity of each road in the traffic congestion area, and a road section flow and a road traffic capacity of each road in the buffer area; determining a difference value between the road section flow of each road in the traffic jam area and the buffer area; taking the difference value between the road section flow of each road in the traffic jam area and the buffer area as a denominator, and taking the road traffic capacity of each road in the buffer area as a numerator, so as to obtain the time for guiding the traffic flow to enter the buffer area; and determining the phase of the corresponding traffic control signal for guiding the traffic flow to enter the buffer area, and determining the time for guiding the traffic flow to enter the buffer area as the phase timing of the corresponding traffic control signal.
In the above scheme, the control module is further configured to obtain a road section flow of each road in the traffic congestion area in real time; and when the road section flow of each road in the traffic jam area is lower than a jam flow threshold value, controlling the traffic signal equipment to output a traffic control signal so as to guide the traffic flow to enter the buffer area and the traffic jam area in turn.
In the above scheme, the control module is further configured to obtain a road section flow of each road in the buffer area in real time; and when the road section flow of each road in the buffer area reaches the corresponding road traffic capacity, guiding the traffic flow to enter the traffic jam area, and when the road section flow of each road in the buffer area is lower than a buffer flow threshold value, guiding the traffic flow to enter the buffer area again.
In the above scheme, the traffic flow control device further includes: and the uplink module is used for uploading control logic for controlling the traffic signals output by the traffic signal equipment to a block chain network, so that when the traffic control equipment dredges that the traffic flow about to enter the traffic jam area enters the buffer area, the traffic control equipment inquires the control logic from the block chain network, guides the traffic flow to enter the buffer area through the control logic and reaches a target area of the traffic flow through the buffer area.
An embodiment of the present invention provides an electronic device, including:
a memory for storing executable instructions;
and the processor is used for realizing the traffic flow control method provided by the embodiment of the invention when the executable instructions stored in the memory are executed.
The embodiment of the invention provides a storage medium, which stores executable instructions and is used for causing a processor to execute so as to realize the traffic flow control method provided by the embodiment of the invention.
The embodiment of the invention has the following beneficial effects:
according to the embodiment of the invention, the traffic control signal is output by controlling the traffic signal equipment through which the traffic flow which is about to enter the traffic jam area passes before reaching the traffic jam area, so that the traffic flow is guided to enter the buffer area through the output traffic control signal and reaches the target area through the buffer area, and the traffic flow can be prevented from continuously entering the traffic jam area to cause more extensive congestion, thereby avoiding long-distance and long-time congestion in urban roads, and realizing efficient and rapid management and control on traffic jam.
Drawings
Fig. 1 is a schematic view of an application scenario of a traffic flow management and control method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electronic device 500 according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a traffic flow control method according to an embodiment of the present invention;
FIG. 4 is a schematic phase diagram of a traffic control signal provided by an embodiment of the present invention;
fig. 5 is a schematic flow chart of a traffic flow control method according to an embodiment of the present invention;
fig. 6 is an application scenario diagram of a traffic flow management and control method according to an embodiment of the present invention;
FIGS. 7A and 7B are schematic diagrams of an embodiment of the present invention providing for the application of water intake and drainage to a water tank;
fig. 8A, 8B, 8C, and 8D are schematic diagrams of application scenarios provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, the described embodiments should not be construed as limiting the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to be limiting of the invention.
Before further detailed description of the embodiments of the present invention, terms and expressions mentioned in the embodiments of the present invention are explained, and the terms and expressions mentioned in the embodiments of the present invention are applied to the following explanations.
1) Traffic control, i.e. traffic organization, refers broadly to the sum of various soft measures taken to solve traffic problems. Soft measures refer to various measures other than large-scale road construction projects (such as new construction, road reconstruction and traffic junctions). In other words, in the case that the main structure state (including the state of the parking facility) of the road is not changed, various engineering technical measures, mathematical methods, economic methods, traffic policies and regulations are adopted for improving the road traffic transportation efficiency and ensuring the road traffic safety. The traffic organization in the narrow sense is mainly the reasonable utilization of the existing road resources.
2) Level crossing means that roads in different directions meet in the same plane (or height), and most intersections seen in daily life are level crossing intersections. Because various vehicles and pedestrians on each crossed road are crossed, the vehicles and the pedestrians in different directions are mutually interfered and collided, the problems of traffic retardation, frequent traffic accidents and the like are easily caused, and the traffic safety and the traffic capacity of the road are influenced. When the traffic flow reaches a certain degree, the signal lamp is needed to control the traffic flow in different directions to go and stop.
3) The grade of the urban road is four grades including an expressway, a main road, a secondary main road and a branch road. Controlling the width of each level of red lines: the expressway is not less than 40 meters, the main trunk is 30-40 meters, the secondary trunk is 25-40 meters, and the branch is 12-25 meters.
An express way: the urban road is provided with a central separation belt, more than four motor vehicle lanes are arranged in the urban road, and all or part of the urban road is provided with a road for vehicles to run at a higher speed by adopting the vertical crossing and controlling the access. Also known as a lane dedicated to automobiles. The designed traveling speed of the express way is 60-100 km/h.
A trunk road: the main road connecting each subarea of the city is mainly used for traffic function. The designed traveling speed of the main road is 40-60 km/h.
Secondary main road: the system plays a role in traffic collection and distribution between the trunk road and each sub-area and has a service function. The designed traveling speed of the secondary trunk road is 30-50 km/h.
Branch circuit: the connection line between the secondary main road and the street road (the residential road) is mainly used for service function. The designed traveling speed of the branch is 20-40 km/h.
4) Traffic occurrence and traffic attraction, where traffic occurrence refers to a process of indicating a traveler to depart from a certain place, and traffic attraction refers to a process of a traveler to depart to a destination. The occurrence traffic volume and the attraction traffic volume are used for calculating traffic traveling volume. The traffic occurrence and the attraction amount can be changed at different places and different times in cities.
5) The flow of the road section is that if the vehicle only has a unique driving path in a certain distance range, the flow passing through a certain section in the range is the section flow. For example, a vehicle entering from a toll gate of an expressway must exit the expressway from a certain preceding toll gate, and the flow rate of any one section between the two toll gates is the section flow rate of the section.
6) The road traffic capacity refers to the capacity of a road facility to dredge a traffic flow, that is, the capacity of the road facility to pass through traffic flow particles in a certain time period (usually 15 minutes or l hours) and under the requirements of normal roads, traffic, control and operation quality. Road capacity is generally expressed in veh/h (vehicles/hour), pcu/h (equivalent standard passenger car/hour). Traffic capacity is essentially a measure of the performance of a road load, which reflects both the maximum capacity of the road to clear traffic and the limit to which the road can assume the operation of the vehicle given its specified characteristics.
7) The phase time of traffic signal lamp (signal lamp for short) and the signal state sequence of one or several traffic flows with same signal lamp color are called a signal phase. The signal phases are divided according to the time sequence of the signal display obtained by the traffic flow, and the signal phases and the phase duration are the total duration of the green light and the yellow light in the current control state. Each control state, corresponding to a different set of combinations of lamp colors, is called a phase, and a phase is also called a control state.
8) A Block chain (Blockchain) is a storage structure for encrypted, chained transactions formed from blocks (blocks).
9) A Blockchain Network (Blockchain Network) incorporates new blocks into a set of nodes of a Blockchain in a consensus manner.
10) Ledger (legger) is a general term for blockchains (also called Ledger data) and state databases synchronized with blockchains. Wherein, the blockchain records the transaction in the form of a file in a file system; the state database records the transaction in the blockchain in the form of different types of Key (Key) Value pairs, and is used for supporting quick query of transaction data in the blockchain.
11) Intelligent Contracts (Smart Contracts), also known as chain codes (chaincodes) or application codes, are programs deployed in nodes of a blockchain network, and the nodes execute the intelligent Contracts called in received transactions to perform operations of updating or querying key-value data of a state database.
12) Consensus (Consensus), a process in a blockchain network, is used to agree on a transaction in a block between the nodes involved, the agreed block to be appended to the end of the blockchain and used to update the state database.
The embodiment of the invention provides a traffic flow control method and device, electronic equipment and a storage medium, which can effectively and quickly control traffic jam. The following describes an exemplary application of the method for managing and controlling a traffic flow according to the embodiment of the present invention, and the method for managing and controlling a traffic flow according to the embodiment of the present invention may be implemented by various electronic devices, for example, a server cluster, or a terminal (for example, a computer, a smart phone with an artificial intelligence core, or the like).
Next, a traffic flow control method provided by an embodiment of the present invention implemented by a traffic control device 100 is described as an example, referring to fig. 1, where fig. 1 is a schematic view of an application scenario of the traffic flow control method provided by the embodiment of the present invention. Where the traffic control device 100 may be connected to the traffic signal device 300 via the network 200, the network 200 may be a wide area network or a local area network, or a combination thereof.
The traffic flow control method provided by the embodiment of the invention can be realized through the following processes: first, the traffic control apparatus 100 monitors a traffic congestion area according to data of traffic flow; then, the traffic control apparatus 100 determines a buffer area for dredging the traffic flow 400 that is about to enter the traffic congestion area; finally, the traffic control apparatus 100 transmits a traffic control signal to the traffic signal apparatus 300 through the network 200 to guide the traffic flow 400 into the buffer area and to reach the target area of the traffic flow 400 via the buffer area.
Next, a structure of an electronic device implementing the method for managing and controlling a traffic flow according to the embodiment of the present invention is described, and in some embodiments, the electronic device may be used in the application scenario shown in fig. 1 to implement the function of the traffic control device 100.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an electronic device 500 according to an embodiment of the present invention, where the electronic device 500 shown in fig. 2 includes: at least one processor 510, memory 550, at least one network interface 520, and a user interface 530. The various components in the electronic device 500 are coupled together by a bus system 540. It is understood that the bus system 540 is used to enable communications among the components. The bus system 540 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 540 in fig. 2.
The Processor 510 may be an integrated circuit chip having Signal processing capabilities, such as a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like, wherein the general purpose Processor may be a microprocessor or any conventional Processor, or the like.
The user interface 530 includes one or more output devices 531 enabling presentation of media content, including one or more speakers and/or one or more visual display screens. The user interface 530 also includes one or more input devices 532, including user interface components to facilitate user input, such as a keyboard, mouse, microphone, touch screen display, camera, other input buttons and controls.
The memory 550 may comprise volatile memory or nonvolatile memory, and may also comprise both volatile and nonvolatile memory. The non-volatile Memory may be a Read Only Memory (ROM), and the volatile Memory may be a Random Access Memory (RAM). The memory 550 described in connection with embodiments of the invention is intended to comprise any suitable type of memory. Memory 550 optionally includes one or more storage devices physically located remote from processor 510.
In some embodiments, memory 550 can store data to support various operations, examples of which include programs, modules, and data structures, or subsets or supersets thereof, as exemplified below.
An operating system 551 including system programs for processing various basic system services and performing hardware-related tasks, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks;
a network communication module 552 for communicating to other computing devices via one or more (wired or wireless) network interfaces 520, exemplary network interfaces 520 including: bluetooth, wireless compatibility authentication (WiFi), and Universal Serial Bus (USB), etc.;
a display module 553 for enabling presentation of information (e.g., a user interface for operating peripherals and displaying content and information) via one or more output devices 531 (e.g., a display screen, speakers, etc.) associated with the user interface 530;
an input processing module 554 to detect one or more user inputs or interactions from one of the one or more input devices 532 and to translate the detected inputs or interactions.
In some embodiments, the traffic flow control device provided by the embodiments of the present invention may be implemented in software, and fig. 2 illustrates a traffic flow control device 555 stored in a memory 550, which may be software in the form of programs and plug-ins, and includes the following software modules: a monitoring module 5551, a determination module 5552, and a control module 5553. These modules may be logical functional modules and thus may be arbitrarily combined or further divided according to the functions implemented. The functions of the respective modules will be explained below.
In other embodiments, the traffic flow management and control Device provided in the embodiments of the present invention may be implemented by combining software and hardware, and as an example, the Device provided in the embodiments of the present invention may be a processor in the form of a hardware decoding processor, which is programmed to execute the traffic flow management and control method provided in the embodiments of the present invention, for example, the processor in the form of the hardware decoding processor may employ one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), or other electronic components.
The following describes in detail a traffic flow control method according to an embodiment of the present invention with reference to the accompanying drawings. Referring to fig. 3, fig. 3 is a schematic flow chart of a traffic flow control method according to an embodiment of the present invention, and the steps shown in fig. 3 will be described.
In step S101, the traffic control apparatus monitors a traffic congestion area according to data of traffic flow.
In some embodiments, the traffic control equipment acquires the road section flow of each road in the area to be monitored in real time; when the road section flow of the road exceeds the corresponding road traffic capacity, determining the road as a crowded road; and when the number of the crowded roads in the area to be monitored exceeds a congestion number threshold value and/or when the proportion of the crowded roads in the area to be monitored exceeds a congestion proportion threshold value, determining the area to be monitored as a traffic congestion area.
As an example, the congestion amount threshold and the congestion ratio threshold may be determined according to the traffic flow injected into the adjacent area by the area to be monitored, for example, when congestion of the area to be monitored causes continuous and obvious decrease of the flow rate of the traffic flow injected into the adjacent area (i.e., decrease occurs relative to the average value injected in the past for a period of time, and the duration exceeds the time threshold), the amount of road congestion corresponding to the area to be monitored is used as the congestion amount threshold, and the ratio of congested roads is used as the congestion ratio threshold.
It should be noted that the traffic control device may perform real-time determination to determine the traffic jam area, that is, once the above conditions are met (when the number of congested roads in the area to be monitored exceeds the threshold of congestion number, and/or when the proportion of congested roads in the area to be monitored exceeds the threshold of congestion proportion), determine the area to be monitored as the traffic jam area; the area to be monitored may also be determined within a certain window time, that is, when the ratio of the duration satisfying the above condition to the window time within the window time exceeds a time ratio threshold, the area to be monitored is determined as the traffic jam area, for example, within 5 minutes of the window time, the time period of the area to be monitored belonging to the traffic jam area is 4 minutes, accounts for 80% of the window time, and exceeds the time ratio threshold by 60%, so the area to be monitored is determined as the traffic jam area.
In some embodiments, the manner of dividing the area governed by the traffic control device into a plurality of sub-areas is as follows: dividing a region governed by the traffic control equipment into a plurality of sub-regions according to an administrative region; and dividing the area governed by the traffic control equipment into a plurality of sub-areas according to the structure of the road network.
As an example, the area within the jurisdiction of the traffic control device includes roads that are classified into expressways, main roads, sub-roads, branch roads, and the like according to road classes. When the area governed by the traffic control device is divided into a plurality of sub-areas according to the structure of the included road network, the sub-areas include roads of different road classes connected to each other.
In some embodiments, the traffic control device determines a sub-area satisfying at least one of the following conditions as the area to be monitored: the occurring traffic volume exceeds the occurring traffic volume threshold; the attraction traffic volume exceeds an attraction traffic volume threshold; broken-gear (namely, cross-grade) connection exists between the included roads in different grades; the parking berths provided cannot meet the parking requirements of the traffic flow into the sub-areas.
As an example, the area to be monitored may be an area where the attraction traffic exceeds the attraction traffic threshold and there is an off-set connection (e.g., an express link is connected to a secondary trunk) between roads of different levels. When a large traffic flow drives from a road with a high road grade to a road with a low road grade, the impact on the road with the low road grade is easily caused, so that congestion is aggravated, congested vehicles even overflow to the road with the high road grade, and further congestion chain reaction of the road with the high road grade is caused, so that the congested vehicles can be determined as an area to be monitored.
As an example, the area to be monitored may be a location of a public infrastructure (e.g., a hospital or school, etc.) where parking space does not meet parking requirements. Because vehicles in the parking lot continuously enter and leave the parking lot, the vacated parking space can not meet the existing real-time requirements all the time, and the vehicles are queued to wait, so that the congestion of the road surface is caused, and the vehicles can be determined as the area to be monitored.
The embodiment of the invention monitors the road section flow of each road in the area to be monitored in real time and judges whether the area to be monitored is a traffic jam area in time, so that traffic flow in the traffic jam area can be guided into the buffer area in time for dredging in the follow-up process, and the time and the distance of traffic jam can be effectively reduced.
In step S102, the traffic control apparatus determines a buffer area for dredging a traffic flow that is about to enter a traffic congestion area.
Here, the traffic jam area is connected with the target area through one or more roads; the traffic jam area is connected with the buffer area through one or more roads; the buffer area and the target area are connected through one or more roads. The length of a driving path of the vehicle from the traffic jam area to the target area through the buffer area is larger than that of the driving path from the traffic jam area to the target area directly.
In some embodiments, the traffic control device determines a road section flow and a road traffic capacity of each road in the traffic jam area, and a road section flow and a road traffic capacity of each road in the target area; and determining a buffer area according to the road section flow and the road traffic capacity of each road in the traffic jam area, and the road section flow and the road traffic capacity of each road in the target area.
As an example, the traffic control device determines the ratio of the road traffic capacity and the road section flow of each road in the traffic jam area as the road ratio of the traffic jam area; determining the ratio of the road traffic capacity and the road section flow of each road in the target area as the road ratio of the target area; determining a road ratio which is greater than the road ratio of the traffic jam area and less than the road ratio of the target area as a target road ratio; an area including a road that reaches the target road ratio is determined as a buffer area.
For example, the road traffic capacity of each road in the traffic jam area is 120veh/h, the road section flow rate is 60veh/h, and the road ratio of the traffic jam area is 120/60-2; the road traffic capacity of each road in the target area is 80veh/h and the road section flow rate is 20veh/h, the road ratio of the obtained target area is 80/20-4, that is, the target road ratio is greater than 2 and less than 4, and therefore, the area including the road reaching the target road ratio can be determined as the buffer area.
In some examples, when there is an off-grade connection between roads of different levels included in the traffic congestion area, the buffer area is determined in such a manner that: the traffic control equipment firstly determines level crossing intersections in a traffic jam area, wherein at least one road in the level crossing intersections is level-crossed with a road grade lower than that of the level crossing intersections; and when the attraction traffic volume of the level crossing exceeds the attraction traffic volume threshold value, determining a right-turn lane area of the level crossing and a turn-around area within a preset range from the level crossing as a buffer area of the traffic flow.
Here, the range of the buffer area is determined in the following manner: the traffic control equipment acquires the traffic suction quantity at the level crossing; and determining the number of right-turn lanes, the number of turn-around lanes and the distance between the turn-around position opening and the level crossing in a buffer area of the traffic flow according to the attraction traffic volume of the level crossing. When the attraction traffic volume of the level crossing is larger, the number of right-turn lanes in the buffer area is larger, the number of turn-around lanes in the buffer area is larger, and the distance between the turn-around position opening and the level crossing in the buffer area is larger.
In other examples, when the parking space provided by the traffic congestion area cannot meet the parking demand of the traffic flow entering the traffic congestion area, the buffer area is determined by: the traffic control device determines an area surrounding the traffic jam area and within a preset range from the traffic jam area as a buffer area for the traffic flow.
Here, the range of the buffer area is determined in the following manner: when the difference between the parking space provided by the traffic jam area and the parking demand of the traffic flow entering the traffic jam area is larger, the range of the buffer area connecting the traffic jam area and the target area is larger.
In step S103, the traffic control device controls the traffic signal device through which the traffic flow passes before reaching the traffic congestion area to output the traffic control signal.
Here, the traffic signal device is a traffic signal (i.e., a traffic light) or an automatic barricade or the like having a function of guiding a traffic flow or a pedestrian flow passing direction.
In some embodiments, the traffic control device obtains the road section flow and the road traffic capacity of each road in the traffic jam area, and buffers the road section flow and the road traffic capacity of each road in the area; according to the road section flow and the road traffic capacity of each road in the traffic jam area, and the road section flow and the road traffic capacity of each road in the target area, the phase of a traffic signal output by a traffic signal device, which is passed by a traffic flow before reaching the traffic jam area, is controlled, and corresponding phase timing is carried out, so that the road section flow of each road in the target area does not exceed the corresponding road traffic capacity.
As an example, the traffic control device obtains the road section flow and the road traffic capacity of each road in the traffic congestion area, and the road section flow and the road traffic capacity of each road in the buffer area; determining a difference value between the road section flow of each road in the traffic jam area and the buffer area; taking the difference value between the road section flow of each road in the traffic jam area and the buffer area as a denominator, and taking the road traffic capacity of each road in the buffer area as a numerator to obtain the time for guiding the traffic flow to enter the buffer area; and determining the phase of the corresponding traffic control signal for guiding the traffic flow into the buffer area, and determining the time for guiding the traffic flow into the buffer area as the phase timing of the corresponding traffic control signal.
Referring to fig. 4, fig. 4 is a schematic phase diagram of a traffic control signal according to an embodiment of the present invention. FIG. 4 shows four different phases of a level crossing, FIG. 4(a), allowing the vehicle to travel from south to north or from north to south; in fig. 4(b), the vehicle in the north-south direction is allowed to run in a left turn; in fig. 4(c), the vehicle is allowed to travel from east to west or west to east; in fig. 4(d), the vehicle in the east-west direction is allowed to run in a left turn.
In step S104, the traffic signal apparatus guides the traffic flow into the buffer area and reaches the target area of the traffic flow via the buffer area.
In some embodiments, the traffic congestion zone and the buffer zone are connected by one or more roads; the buffer area and the target area are connected by one or more roads, so that the traffic signal device can guide the traffic flow into the buffer area and reach the target area of the traffic flow through the buffer area.
According to the embodiment of the invention, the traffic signal equipment through which the traffic flow which is about to enter the traffic jam area passes before reaching the traffic jam area is controlled to output the traffic control signal, so that the traffic flow is guided to enter the buffer area and reach the target area through the buffer area, and the traffic jam can be effectively controlled, so that the long-distance and long-time jam can be avoided.
Referring to fig. 5, fig. 5 is a schematic flowchart of a traffic flow control method according to an embodiment of the present invention, and based on fig. 4, after step S104, steps S105 to S107 may be included.
In step S105, the traffic control device acquires the road section flow of each road in the traffic congestion area in real time.
In some embodiments, the traffic control device may obtain the road section flow of each road in the traffic congestion area in real time through the road monitoring device.
In step S106, when the road section flow of each road in the traffic jam area is lower than the jam flow threshold, the traffic control device controls the traffic signal device to output the traffic control signal.
Here, the congestion flow rate threshold value may be determined according to the traffic flow injected into the adjacent area by the traffic congestion area, for example, when the congestion of the traffic congestion area causes a continuous and significant increase in the flow rate of the traffic flow injected into the adjacent area, the road section flow rate corresponding to the traffic congestion area is used as the congestion flow rate threshold value.
In some embodiments, when the road section flow of each road in the traffic congestion area is lower than the congestion flow threshold, the congestion condition that characterizes the traffic congestion area is alleviated (i.e., the road section flow is increased), so that the traffic congestion area and the destination area can jointly consume the traffic flow that is about to enter the traffic congestion area.
As an example, a traffic jam area may not be jammed at infinite time, and when the traffic jam area is not in a time period of a traffic flow peak (for example, an on-off peak or an on-off peak), a road section flow of each road in the traffic jam area is lower than a jam flow threshold, at this time, the traffic jam area and the destination area may be used to jointly consume a traffic flow about to enter the traffic jam area, so that the traffic flow in the traffic jam area may be expedited to dredge.
In step S107, the traffic signal apparatus directs the traffic flow to alternately enter the buffer area and the traffic jam area.
In some embodiments, the time for guiding the traffic flow or the number of guiding the traffic flows may be used as a switching condition, and the traffic flows are guided to enter the buffer area and the traffic jam area in turn, for example: the guidance direction is switched once every 5 minutes (or every 500 vehicles), the traffic flow is changed from the direction of being previously guided into the buffer area to enter the traffic jam area (or the traffic flow is changed from the direction of being previously guided into the traffic jam area to enter the buffer area), and the traffic flow can be switched to enter the traffic jam area and the buffer area simultaneously.
In some embodiments, the traffic control device obtains the road section flow of each road in the buffer area in real time; when the road section flow of each road in the buffer area reaches the corresponding road traffic capacity, the traffic control equipment controls the traffic signal equipment to output a traffic control signal so as to guide the traffic flow to enter a traffic jam area, and when the road section flow of each road in the buffer area is lower than the buffer flow threshold value, the traffic flow is guided to enter the buffer area again.
According to the embodiment of the invention, the traffic flow is alternately guided into the buffer area and the traffic jam area by monitoring the road section flow of each road in the buffer area in real time, so that the condition that the buffer area is jammed due to excessive traffic flow introduced into the buffer area can be avoided, and the traffic flow in the traffic jam area can be more effectively dredged.
In some embodiments, the traffic control device may further upload control logic (hereinafter, referred to as control logic) for controlling a traffic signal output by the traffic signal device to the blockchain network for storage, so that when the traffic control device grooms that a traffic flow about to enter a traffic jam area enters a buffer area, the traffic control device may directly query the corresponding control logic from the blockchain network, and guide the traffic flow to enter the buffer area through the queried control logic and reach a target area of the traffic flow through the buffer area, which is specifically described below.
Referring to fig. 6, fig. 6 is a schematic view of an application scenario of a traffic flow management and control method provided by an embodiment of the present invention, and includes a block chain network 600 (exemplarily illustrating a consensus node 610-1 to a consensus node 610-3), an authentication center 700, a service body 800, and a client node 810, which are respectively described below.
The type of blockchain network 600 is flexible and may be, for example, any of a public chain, a private chain, or a federation chain. Taking a public chain as an example, electronic devices of any service subject can access the blockchain network 600 without authorization to become client nodes; taking a federation chain as an example, after obtaining authorization, an electronic device hosted by the service body 800 may access the blockchain network 600 to become a client node in the blockchain network 600.
As an example, when the blockchain network 600 is a federation chain, the business entity 800 registers with the certificate authority 700 to obtain a respective digital certificate, which includes the public key of the business entity and a digital signature signed by the certificate authority 700 on the public key and identity information of the business entity 800, and is used to be appended to a transaction (e.g., a transaction for uplink storage of control logic or a transaction for querying control logic on the chain) together with the digital signature of the business entity 800 for the transaction, and is sent to the blockchain network 600, so that the blockchain network 600 takes the digital certificate and the digital signature from the transaction, verifies the reliability of the transaction (i.e., whether it has not been tampered with) and the identity information of the business entity 800 sending the message, and the blockchain network 600 verifies the identity, for example, whether it has the right to initiate the transaction.
In some embodiments, the client node may act as a mere watcher of the blockchain network 600, i.e., provide functionality that supports the initiation of transactions by the business entity (e.g., transactions for uplink storage control logic or transactions for polling control logic on the chain), and may be implemented by default or selectively (e.g., depending on the specific business requirements of the business entity) for the functions of the consensus node 610 of the blockchain network 600, such as ordering functionality, consensus services and ledger functionality, etc. Therefore, the data and the service processing logic of the service subject can be migrated to the blockchain network 600 to the maximum extent, and the credibility and traceability of the data and service processing process are realized through the blockchain network 600.
Consensus nodes in blockchain network 600 receive transactions submitted by client nodes from different business entities, execute the transactions to update or query the ledger, and various intermediate or final results of executing the transactions may be returned to the business entity's client nodes for display.
First, the service agent 800 (traffic control platform) is exemplified to uplink the storage control logic in the blockchain network 600.
When the corresponding uplink logic is set at the client node 810 belonging to the traffic control device, and the client node 810 sends the control logic to the blockchain network 600, a corresponding transaction is generated, where the transaction includes: the intelligent contract that needs to be invoked for the uplink control logic, and the parameters passed to the intelligent contract; the transaction also includes the client node's 810 digital certificate, signed digital signature, and broadcasts the transaction to the consensus node 610 in the blockchain network 600.
When a transaction is received in the consensus node 610 in the blockchain network 600, the digital certificate and the digital signature carried in the transaction are verified, after the verification is successful, whether the service body 800 has the transaction right or not is determined according to the identity of the service body 800 carried in the transaction, and the transaction fails due to any verification judgment of the digital signature and the right verification. After verification is successful, the consensus node 610 signs its own digital signature (e.g., by encrypting a digest of the transaction using the client node's 810 private key) and continues to broadcast in the blockchain network 600.
After the consensus node 610 in the blockchain network 600 receives the transaction successfully verified, the transaction is filled into a new block and broadcast. When a new block is broadcasted by the consensus node 610 in the block chain network 600, the new block is verified, for example, whether the digital signature of the transaction in the new block is valid is verified, if the verification is successful, the new block is appended to the tail of the block chain stored in the new block, and the state database is updated according to the transaction result to execute the transaction in the new block: for submitted transactions where the uplink stores control logic, key-value pairs comprising the control logic are added to the state database.
The service agent 800 (traffic control platform) will be described as an example of querying the control logic in the blockchain network 600.
The type of data that can be queried in the blockchain network 600 by the client node 810 belonging to the traffic control device can be realized by the consensus node 610 by restricting the authority of the transaction that can be initiated by the client phase of the service body, when the client node 810 has the authority to initiate query control logic, a transaction for querying the control logic can be generated by the client node 810 and submitted into the blockchain network 600, the transaction is executed from the consensus node 610 to query corresponding control logic from the status database, and returned to the client node 810, so that the client node 810 can acquire the phase and timing of the traffic signal control device corresponding to the control logic, not only can the reliability of the phase and timing of the traffic signal control device corresponding to the control logic acquired by the traffic control device be ensured, but also the traffic signal control device can be prevented from consuming time again to calculate the phase and timing of the corresponding traffic signal control device, thereby improving the rapidity of traffic dispersion.
Continuing with fig. 2, an exemplary structure of the traffic flow control device 555 provided by the embodiment of the present invention implemented as a software module is described below, and in some embodiments, as shown in fig. 2, the software module stored in the traffic flow control device 555 of the memory 550 may include: a monitoring module 5551, a determination module 5552, and a control module 5553.
A monitoring module 5551, configured to monitor a traffic congestion area according to data of a traffic flow;
a determination module 5552 for determining a buffer area for grooming traffic flow coming into the traffic congestion area;
a control module 5553, configured to control a traffic signal device through which the traffic flow passes before reaching the traffic congestion area to output a traffic control signal so as to guide the traffic flow to enter the buffer area and reach a target area of the traffic flow through the buffer area.
In the above scheme, the monitoring module 5551 is further configured to obtain road section flow of each road in the area to be monitored in real time; when the road section flow of the road exceeds the corresponding road traffic capacity, determining the road as a crowded road; and when the number of the crowded roads in the area to be monitored exceeds a congestion number threshold value and/or when the proportion of the crowded roads in the area to be monitored exceeds a congestion proportion threshold value, determining the area to be monitored as a traffic congestion area.
In the above scheme, the traffic flow control device 555 further includes: the dividing module is used for dividing the area governed by the traffic control equipment into a plurality of sub-areas according to at least one of the following modes: dividing the area governed by the traffic control equipment into a plurality of sub-areas according to an administrative area; and dividing the area governed by the traffic control equipment into a plurality of sub-areas according to the structure of the road network.
In the above scheme, the traffic flow control device 555 further includes: a region determining module, configured to determine the sub-region satisfying at least one of the following conditions as a region to be monitored: the occurring traffic volume exceeds the occurring traffic volume threshold; the attraction traffic volume exceeds an attraction traffic volume threshold; broken-gear type connection exists between the included roads in different levels; the parking berths provided are unable to meet the parking requirements of the traffic flow entering the sub-area.
In the above solution, the determining module 5552 is further configured to determine a road section flow and a road traffic capacity of each road in the traffic congestion area, and a road section flow and a road traffic capacity of each road in the target area; determining the buffer area according to the road section flow and the road traffic capacity of each road in the traffic jam area, and the road section flow and the road traffic capacity of each road in the target area; wherein the buffer area is respectively connected with the traffic jam area and the target area.
In the above solution, the determining module 5552 is further configured to determine a ratio of a road traffic capacity of each road in the traffic congestion area to a road section flow as a road ratio of the traffic congestion area; determining the ratio of the road traffic capacity and the road section flow of each road in the target area as the road ratio of the target area; determining a road ratio which is greater than the road ratio of the traffic jam area and less than the road ratio of the target area as a target road ratio; determining an area including a road reaching the target road ratio as the buffer area.
In the above scheme, the control module 5553 is further configured to obtain a road section flow and a road traffic capacity of each road in the traffic congestion area, and a road section flow and a road traffic capacity of each road in the buffer area; determining a difference value between the road section flow of each road in the traffic jam area and the buffer area; taking the difference value between the road section flow of each road in the traffic jam area and the buffer area as a denominator, and taking the road traffic capacity of each road in the buffer area as a numerator, so as to obtain the time for guiding the traffic flow to enter the buffer area; and determining the phase of the corresponding traffic control signal for guiding the traffic flow to enter the buffer area, and determining the time for guiding the traffic flow to enter the buffer area as the phase timing of the corresponding traffic control signal.
In the above scheme, the control module 5553 is further configured to obtain a road section flow of each road in the traffic congestion area in real time; and when the road section flow of each road in the traffic jam area is lower than a jam flow threshold value, controlling the traffic signal equipment to output a traffic control signal so as to guide the traffic flow to enter the buffer area and the traffic jam area in turn.
In the above scheme, the control module 5553 is further configured to obtain a road section flow of each road in the buffer area in real time; and when the road section flow of each road in the buffer area reaches the corresponding road traffic capacity, guiding the traffic flow to enter the traffic jam area, and when the road section flow of each road in the buffer area is lower than a buffer flow threshold value, guiding the traffic flow to enter the buffer area again.
In the above scheme, the traffic flow control device 555 further includes: and the uplink module is used for uploading control logic for controlling the traffic signals output by the traffic signal equipment to a block chain network, so that when the traffic control equipment dredges that the traffic flow about to enter the traffic jam area enters the buffer area, the traffic control equipment inquires the control logic from the block chain network, guides the traffic flow to enter the buffer area through the control logic and reaches a target area of the traffic flow through the buffer area.
The embodiment of the present invention provides a storage medium storing executable instructions, wherein the executable instructions, when executed by a processor, will cause the processor to execute the method for managing and controlling traffic flow provided by the embodiment of the present invention, for example, the method for managing and controlling traffic flow as shown in fig. 3 and 5.
In some embodiments, the storage medium may be memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface memory, optical disk, or CD-ROM; or may be various devices including one or any combination of the above memories.
In some embodiments, executable instructions may be written in any form of programming language (including compiled or interpreted languages), in the form of programs, software modules, scripts or code, and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment.
By way of example, executable instructions can correspond, but do not necessarily correspond, to files in a file system, and can be stored in a portion of a file that holds other programs or data, e.g., in one or more scripts stored in a hypertext markup language document, in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub-programs, or portions of code).
By way of example, executable instructions may be deployed to be executed on one computing device or on multiple computing devices at one site or distributed across multiple sites and interconnected by a communication network.
Next, an exemplary application of the embodiment of the present invention to grooming a traffic flow in a traffic congestion area will be described.
In order to facilitate understanding of the method for managing and controlling a traffic flow according to an embodiment of the present invention, first, a case of water inflow and water drainage of a water tank is described with reference to fig. 7A and 7B, where fig. 7A and 7B are schematic diagrams of an application of water inflow and water drainage of a water tank according to an embodiment of the present invention.
In FIG. 7A, a large water tank discharges water into a small water tank through a water pipe having a sectional area of S1, the small water tank has a water discharge pipe having a sectional area of S2, and the large water tank is arranged at regular intervals of time t1Opening a drain pipe valve to drain water, wherein the draining time is t2. The volume of the small water tank is V, and the flow velocity of water in the two water pipes is assumed to be constant as V (unit: decimeter per second). Because the difference of the cross-sectional areas of the drainage pipes of the large and small water tanks is S1-S2, t is t caused when the drainage time of the large water tank is too long2×△S>And when the water tank is V, the small water tank overflows. When the large water tank closes the drain valve, if the interval time t1 is too small, t is caused1×v<When V, the small water tank is not drained completely, and the large water tank is filled with new water (assuming that the water in the large water tank is continuous), so that the small water tank overflows continuously. One method for solving the problem of no overflow of the small water tank is to adjust t1And t2To prevent overflow of small tanks, e.g. to shorten t2Duration, extension of t1The length of time.
There is another method to solve the overflow problem of the small tank, referring to fig. 7B, a volume V2 (V2) is added between the large tank and the small tank>V) and then connected to the small water tank through a water pipe having a sectional area of S3. The difference of the cross sections of the drainage pipes of the large water tank and the buffer water tank is S1-S3, and the volume of the buffer water tank is V2>Δ S1 × t 2. Of buffer tanks and small tanksThe difference of the cross-sectional area is Delta S2 ═ S3-S2, V>△S2×t2. Therefore, the buffer water tank and the small water tank can not drain water in the large water tank for time t2Overflow occurs inside.
If the interval time t1In the device, the water in the buffer water tank and the small water tank can be completely drained, and the buffer water tank and the small water tank cannot overflow.
The similar conditions can also occur in the traffic flow in urban roads, the embodiment of the invention replaces the water flow with the traffic flow, replaces the capacity of a water tank with the traffic capacity of the road, replaces the sectional area of a drainage pipe with the sectional flow of the road, and replaces the water drainage time and the interval time with the traffic light time.
The embodiment of the present invention is described with reference to fig. 8A, 8B, 8C, and 8D, and fig. 8A, 8B, 8C, and 8D are schematic diagrams of application scenarios provided by the embodiment of the present invention. In fig. 8A, there is a large residential district, which attracts a large number of commuters to get home during off duty hours, and the traffic load of the road network through which the commuters drive to get home is therefore greatly increased. The traffic network around the residential district is shown in fig. 8A, the district plot is connected to the south-north secondary main road through a branch road, and the secondary main road is respectively crossed with an east-west main road and an east-west urban expressway in a plane.
Under the established road network structure, when a commuter drives a vehicle to go home from work, most of the commuters choose city expressways to drive, then switch to secondary main roads, and finally return to the cell through branches entering and exiting the cell, wherein the driving path of the vehicle is shown in fig. 8B.
When the traffic flow changes, the length of waiting for the lights for queuing of vehicles can be interfered by adjusting the time length of the phase of the signal lamps at the level crossing of the main road and the secondary road, but because the traffic flow of the main road is also very large in the off-duty peak period, a large amount of traffic flow from the urban expressway is difficult to relieve even when the phase of the signal lamps is adjusted, and the distance between the intersection of the main road and the secondary road and the urban expressway is not long, so that vehicles running from north to south of the secondary road can rush into the secondary road immediately to cause congestion, and can overflow to the urban expressway, and further cause congestion of the urban expressway from west to east.
Referring to the design of the reservoir type buffer tank in the embodiment of the invention, as shown in fig. 8C, at the intersection of the main road and the secondary road, the arrangement of prohibiting the vehicle from going straight from north to south on the secondary road is provided, the traffic flow of the secondary road from north to south is cut off, and the arrangement of the secondary road from north to south is further provided to be organized into a right-turn main road (from east to west). Turning lanes are arranged at the west openings of level crossings of the main road and the secondary road (the distance between the turning position opening and the level crossing, the number of turning lanes, signal phase timing and the like are determined according to the traffic condition of the road). Therefore, the traffic flow is firstly placed in the buffer area of the main road, and the impact on the secondary main road and the branch road is avoided.
After the traffic organization of the reservoir type buffer is redesigned, the running path of the vehicle is shown in fig. 8D, the number of controlled signal lamps is unchanged in the running process of the vehicle, the running path is slightly prolonged, but large-scale congestion and overflow are avoided.
The embodiment of the invention can also be applied to places of public infrastructure where parking space of a parking lot can not meet parking requirements, such as hospitals. Because the vehicles in the parking lot continuously enter and leave the parking lot, the vacated parking space can not meet the real-time requirement all the time, so that the vehicles queue to wait, and further, when congestion to the road surface is caused, a roundabout interval (namely the buffer interval) can be set, and the large traffic flow entering the parking lot is buffered.
In summary, the embodiments of the present invention have the following beneficial effects:
the whole waiting time during the peak traffic flow period is saved, the parking times are reduced, and the long-distance and long-time jam is avoided. The congested road section is cut into a plurality of sections through the buffer section, so that the traffic flow is easier to adjust and easier to dredge.
The above description is only an example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention are included in the protection scope of the present invention.
Claims (10)
1. A traffic flow control method is characterized by comprising the following steps:
monitoring a traffic jam area according to data of traffic flow;
determining the road section flow and the road traffic capacity of each road in the traffic jam area, namely determining the road section flow and the road traffic capacity of each road in a target area of the traffic flow entering the traffic jam area;
determining the ratio of the road traffic capacity and the road section flow of each road in the traffic jam area as the road ratio of the traffic jam area;
determining the ratio of the road traffic capacity and the road section flow of each road in the target area as the road ratio of the target area;
determining a road ratio which is greater than the road ratio of the traffic jam area and less than the road ratio of the target area as a target road ratio;
determining an area including roads up to the target road ratio as a buffer area for diverting traffic flow coming into the traffic congestion area;
the buffer area is respectively connected with the traffic jam area and the target area;
and the traffic signal equipment for controlling the traffic flow about to enter the traffic jam area to pass before reaching the traffic jam area outputs traffic control signals so as to guide the traffic flow about to enter the traffic jam area into the buffer area and reach the target area through the buffer area.
2. The method of claim 1, wherein monitoring traffic congestion areas based on data of traffic flow comprises:
acquiring the road section flow of each road in the area to be monitored in real time;
when the road section flow of the road exceeds the corresponding road traffic capacity, determining the road as a crowded road;
and when the number of the crowded roads in the area to be monitored exceeds a congestion number threshold value and/or when the proportion of the crowded roads in the area to be monitored exceeds a congestion proportion threshold value, determining the area to be monitored as a traffic congestion area.
3. The method according to claim 2, wherein before the obtaining of the road section flow of each road in the area to be monitored in real time, the method further comprises:
dividing the area governed by the traffic control device into a plurality of sub-areas according to at least one of the following ways:
dividing the area governed by the traffic control equipment into a plurality of sub-areas according to an administrative area;
dividing the area governed by the traffic control equipment into a plurality of sub-areas according to the structure of the road network;
determining the sub-area satisfying at least one of the following conditions as the area to be monitored:
the occurring traffic volume exceeds the occurring traffic volume threshold;
the attraction traffic volume exceeds an attraction traffic volume threshold;
broken-gear type connection exists between the included roads in different levels;
the parking berths provided are unable to meet the parking requirements of the traffic flow entering the sub-area.
4. The method of claim 1, wherein the controlling the traffic signal devices through which the traffic flow about to enter the traffic congestion area passes before reaching the traffic congestion area to output traffic control signals comprises:
acquiring the road section flow and the road traffic capacity of each road in the traffic jam area, and the road section flow and the road traffic capacity of each road in the buffer area;
determining a difference value between the road section flow of each road in the traffic jam area and the buffer area;
taking the difference value between the road section flow of each road in the traffic jam area and the buffer area as a denominator, and taking the road traffic capacity of each road in the buffer area as a numerator, so as to obtain the time for guiding the traffic flow which is about to enter the traffic jam area to enter the buffer area;
and determining the phase of the corresponding traffic control signal for guiding the traffic flow entering the traffic jam area to enter the buffer area, and determining the time for guiding the traffic flow entering the traffic jam area to enter the buffer area as the phase timing of the corresponding traffic control signal.
5. The method according to claim 1, wherein after said directing said flow of traffic into said traffic congestion area into said buffer area, said method further comprises:
acquiring the road section flow of each road in the traffic jam area in real time;
when the road section flow of each road in the traffic jam area is lower than the jam flow threshold value,
and controlling the traffic signal equipment to output traffic control signals so as to guide the traffic flow about to enter the traffic jam area to enter the buffer area and the traffic jam area in turn.
6. The method of claim 5, wherein said directing said incoming traffic flow into said traffic congestion area to take turns entering said buffer area and said traffic congestion area comprises:
acquiring the road section flow of each road in the buffer area in real time;
when the road section flow of each road in the buffer area reaches the corresponding road traffic capacity,
and guiding the traffic flow which is about to enter the traffic jam area until the road section flow of each road in the buffer area is lower than a buffer flow threshold value, and guiding the traffic flow which is about to enter the traffic jam area to enter the buffer area again.
7. The method of claim 1, further comprising:
uploading control logic for controlling the traffic signals output by the traffic signal equipment to a block chain network, so that when the traffic control equipment dredges that the traffic flow which is about to enter the traffic jam area enters the buffer area, the traffic control equipment inquires the control logic from the block chain network, guides the traffic flow which is about to enter the traffic jam area to enter the buffer area through the control logic, and reaches the target area through the buffer area.
8. A management and control device for traffic flow, which is characterized in that the device comprises:
the monitoring module is used for monitoring a traffic jam area according to the data of the traffic flow;
the determining module is used for determining the road section flow and the road traffic capacity of each road in the traffic jam area, and namely the road section flow and the road traffic capacity of each road in a target area of traffic flow entering the traffic jam area; determining the ratio of the road traffic capacity and the road section flow of each road in the traffic jam area as the road ratio of the traffic jam area; determining the ratio of the road traffic capacity and the road section flow of each road in the target area as the road ratio of the target area; determining a road ratio which is greater than the road ratio of the traffic jam area and less than the road ratio of the target area as a target road ratio; determining an area including roads up to the target road ratio as a buffer area for diverting traffic flow coming into the traffic congestion area; the buffer area is respectively connected with the traffic jam area and the target area;
the control module is used for controlling the traffic signal equipment through which the traffic flow about to enter the traffic jam area passes before reaching the traffic jam area to output traffic control signals so as to guide the traffic flow about to enter the traffic jam area to enter the buffer area and reach the target area through the buffer area.
9. An electronic device, characterized in that the electronic device comprises:
a memory for storing executable instructions;
a processor, configured to execute the executable instructions stored in the memory, and implement the method for managing and controlling traffic flow according to any one of claims 1 to 7.
10. A computer-readable storage medium having stored thereon executable instructions, wherein the executable instructions, when executed by a processor, implement the method for managing traffic flow according to any one of claims 1 to 7.
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