CN110599782B - Method for controlling duration of traffic lights according to population distribution thermodynamic diagrams - Google Patents
Method for controlling duration of traffic lights according to population distribution thermodynamic diagrams Download PDFInfo
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- CN110599782B CN110599782B CN201911081679.0A CN201911081679A CN110599782B CN 110599782 B CN110599782 B CN 110599782B CN 201911081679 A CN201911081679 A CN 201911081679A CN 110599782 B CN110599782 B CN 110599782B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
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Abstract
A method of controlling the duration of a traffic light according to a population distribution thermodynamic diagram, comprising the steps of: the method comprises the steps of firstly, obtaining a map with a plurality of traffic light positions in an area position; step two, acquiring a real-time population distribution thermodynamic diagram corresponding to the map; matching the road corresponding to the traffic light with the real-time population distribution thermodynamic diagram to obtain the real-time population distribution thermodynamic diagram corresponding to the traffic light road; and step four, adjusting the duration of the traffic lights according to the congestion rate of the road faced by the traffic lights. The road congestion rate is combined with a real-time population distribution map, so that the road congestion rate is calculated more accurately, the calculation amount is smaller, and the real-time acquisition and analysis of data are facilitated.
Description
Technical Field
The invention relates to the field of intelligent traffic, in particular to a method for controlling the time length of a traffic light.
Background
Intersections with large urban traffic flow in China are basically signal control methods with fixed periods, and each intersection is provided with fixed green light, yellow light and red light time. The time of the traffic lights is fixed time determined according to the statistical result of the historical traffic flow.
Because more and more people select cars to go out at present, the traffic flow condition becomes more complex, and the traffic flow change at the same intersection at different time intervals is larger, so that the traffic flow with complex change can not be met obviously by adopting fixed traffic light time.
Disclosure of Invention
The object of the invention is: in order to solve the problems in the prior art, the invention aims to break through the limitation of the prior art and further improve the scheme of the time length of the traffic light, so that the time length of the traffic light can play an effective relieving role in relieving traffic jam.
The technical scheme is as follows: in order to solve the technical problems:
a method of controlling the duration of a traffic light according to a population distribution thermodynamic diagram, comprising the steps of:
the method comprises the steps of firstly, obtaining a map with a plurality of traffic light positions in an area position;
step two, acquiring a real-time population distribution thermodynamic diagram corresponding to the map;
matching the road corresponding to the traffic light with the real-time population distribution thermodynamic diagram to obtain the real-time population distribution thermodynamic diagram corresponding to the traffic light road;
and step four, adjusting the duration of the traffic lights according to the congestion rate of the road faced by the traffic lights.
The method for controlling the time length of the traffic lights is characterized in that each point of the population thermodynamic distribution map has mobile phone signaling data, and the mobile phone signaling data comprises a mobile phone IMSI number, a timestamp and a position area number.
The method for controlling the duration of the traffic lights comprises the step of dividing a road into blocking molecules according to the position change data of each point on the population distribution thermodynamic diagram.
The method for controlling the duration of the traffic light, wherein the road section congestion rate is preferably the quotient of the area of the blocked molecules divided by the area of the road.
The method for controlling the duration of the traffic light is characterized in that the blocking molecules are judged by carrying out circumference mapping according to data point distribution of a real-time thermodynamic diagram.
The method for controlling the time length of the traffic light is characterized in that the blocking molecules are buses, cars and vans.
The method for controlling the time length of the traffic light is characterized in that the road section congestion rate is obtained according to the road surface area and the blocked molecule area.
The method for controlling the time length of the traffic lights comprises the following steps of: a first traffic light, a second traffic light and a third traffic light; and when the road section congestion rate of the second traffic light exceeds a second threshold value, prolonging the red light time of the first traffic light and prolonging the green light time of the third traffic light.
(III) the beneficial effects are as follows: the invention provides a method for controlling the duration of a traffic light according to population distribution thermodynamic diagrams, which comprises the steps of matching a road corresponding to the traffic light with a real-time population distribution thermodynamic diagram to obtain the real-time population distribution thermodynamic diagram corresponding to the traffic light road; the traffic light duration of the road section around the traffic light jam is dynamically adjusted, so that more passing time is provided for the traffic light jam road section, and the jam condition of the road section is relieved. The road congestion rate is combined with a real-time population distribution map, so that the road congestion rate is calculated more accurately, the calculation amount is smaller, and the real-time acquisition and analysis of data are facilitated.
Drawings
FIG. 1 is a flow chart of a method for controlling the duration of a traffic light according to a population distribution thermodynamic diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to preferred embodiments, and more details are set forth in the following description in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from the description herein and can be similarly generalized and deduced by those skilled in the art based on the practical application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of this detailed embodiment.
The drawings are schematic representations of embodiments of the invention, and it is noted that the drawings are intended only as examples and are not drawn to scale and should not be construed as limiting the true scope of the invention.
The invention provides a method for controlling the duration of a traffic light according to a population distribution thermodynamic diagram, which comprises the following steps as shown in figure 1:
firstly: acquiring a map with a plurality of traffic light positions in an area position, wherein the positions on the map can use position area numbers;
and secondly, acquiring a real-time population distribution thermodynamic diagram corresponding to the map, wherein each point of the population distribution thermodynamic diagram has mobile phone signaling data. The mobile phone signaling data is communication data between a mobile phone user and a transmitting base station or a micro station, and comprises fields of a mobile phone IMSI number, a timestamp, a position area number, an event type and the like. The mobile phone signaling data is data of a communication relation sent between a mobile phone and a nearby base station or a micro station, and because the position of the communication base station is fixed and known, the position information of the base station reflects the position of a user, so that the mobile phone signaling data field always has information such as time, position and the like, and the position information can be reflected in a position area number.
Thirdly, matching the road corresponding to the traffic light with the real-time population distribution thermodynamic diagram to obtain the real-time population distribution thermodynamic diagram corresponding to the traffic light road;
fourthly, dividing the road into congestion molecules according to each point on the population distribution thermodynamic diagram, namely data point position change data, wherein the congestion molecules can be buses, cars and vans without specific limitation, and obtaining the road section congestion rate according to the road area and the congestion molecule area, wherein the road section congestion rate preferably can be a quotient of the area of the congestion molecules divided by the road area. According to the invention, the road section congestion rate is obtained through the blocking molecules and the road area, and the calculation rate of the system is improved.
The calculation of the clogging molecules can carry out circumference mapping according to the data point distribution of the real-time thermodynamic diagram, for example, the thermal force points with the same speed in the continuous first threshold time can be defined as the data in one vehicle: judging the type of the blocked molecules according to the distribution shape of the thermal points, for example, the thermal points are front and back points; then the clogging molecule is a car; if the thermal point is three rows, the type of the blocking molecule is a minibus; if the thermal point is more than 4 rows in the front and the back, the type of the blocking molecule is the bus. The area occupied by the blocking molecules on the road and the congestion rate can be judged according to the judgment of the type of the blocking molecules.
Fifthly, adjusting the time length of the traffic lights according to the congestion rate of the road faced by the traffic lights.
According to the embodiment of the invention for controlling the time length of the traffic lights according to the human map of population distribution, the time length of the adjacent traffic lights can be adjusted according to the congestion rate of the road section, such as the first traffic light, the second traffic light and the third traffic light of three continuous traffic lights, and when the congestion rate of the road section of the second traffic light exceeds the second threshold value, the time length of the red light of the first traffic light is prolonged, and the time length of the green light of the third traffic light is prolonged. The second threshold value may preferably be 70%. The method and the device dynamically adjust the second traffic light of the severely congested road section, and when the congestion rate of the road section corresponding to the second traffic light exceeds a second threshold value, the red light time of the first traffic light is prolonged in time, and the green light time of the third traffic light is prolonged in time, so that the congestion condition of the second traffic light can be relieved in time, and the traffic condition of the whole road section is dynamically adjusted.
The method for controlling the duration of the traffic lights according to the population distribution thermodynamic diagram can preferably select the real-time region on the basis of the real-time population distribution thermodynamic diagram corresponding to the traffic light road, select the region needing to dynamically adjust the duration of the traffic lights through a mouse, touch control and other modes, mark the standard traffic lights in the selected region range, wherein the standard traffic lights are the traffic lights needing to be mainly dredged, and other adjacent traffic lights around can dynamically adjust according to the population distribution thermodynamic diagram on the basis of the standard traffic lights. The traffic light with the road congestion rate exceeding the second threshold value can be defined as the reference traffic light.
In another preferred embodiment of the invention, a traffic light network map in the selected area is drawn, and then the time length of the traffic light on the traffic light network map is dynamically adjusted by combining a real-time population distribution thermodynamic diagram on the traffic light network map. Preferably, the road section congestion rate of the road section corresponding to each traffic light is calculated, and when the road section congestion rate exceeds a third threshold value, the road section congestion rate is called as congestion traffic light; when the congestion rate of the road section is lower than a fourth threshold value, the traffic light is called as an idle traffic light; in order to dynamically adjust the nodes around the congested traffic light. The traffic light adjacent to the congestion traffic light is called a first-layer congestion node, the adjacent traffic light outside the first-layer congestion node is called a second-layer congestion node, and the like; the traffic light adjacent to the idle traffic light is called a first idle node, the adjacent traffic light except the first idle node is called a second idle node, and the like. According to the invention, the first-layer congestion node and the first idle node are intersected, the intersection point of the first-layer congestion node and the first idle node is limited to be used as a dredging point, the red light duration of the dredging point at the upstream of the travel is prolonged, and the green light duration of the dredging point at the downstream of the travel is prolonged, so that the traffic congestion in the drawing selection area is effectively relieved. The invention can also implement traffic light time delay schemes with different proportions on the congestion nodes of the first layer and the congestion points of the second layer, such as 50% red light time delay of the congestion nodes of the first layer at the upstream of the journey and 50% green light time delay of the congestion nodes of the first layer at the downstream of the journey; the red light of the congestion node of the second layer at the upstream of the journey is delayed by 30%, and the green light of the congestion node of the first layer at the downstream of the journey is delayed by 30%; specific values are not limiting of the invention.
The invention provides a traffic light duration control method, which comprises the steps of matching a road corresponding to a traffic light with a real-time population distribution thermodynamic diagram to obtain the real-time population distribution thermodynamic diagram corresponding to the traffic light road; the traffic light duration of the road section around the traffic light jam is dynamically adjusted, so that more passing time is provided for the traffic light jam road section, and the jam condition of the road section is relieved. The road congestion rate is combined with a real-time population distribution map, so that the road congestion rate is calculated more accurately, the calculation amount is smaller, and the real-time acquisition and analysis of data are facilitated.
The above description is provided for the purpose of illustrating the preferred embodiments of the present invention and will assist those skilled in the art in more fully understanding the technical solutions of the present invention. However, these examples are merely illustrative, and the embodiments of the present invention are not to be considered as being limited to the description of these examples. For those skilled in the art to which the invention pertains, several simple deductions and changes can be made without departing from the inventive concept, and all should be considered as falling within the protection scope of the invention.
Claims (6)
1. A method of controlling the duration of a traffic light according to a population distribution thermodynamic diagram, comprising the steps of:
the method comprises the steps of firstly, obtaining a map with a plurality of traffic light positions in an area position;
step two, acquiring a real-time population distribution thermodynamic diagram corresponding to the map;
matching the road corresponding to the traffic light with the real-time population distribution thermodynamic diagram to obtain the real-time population distribution thermodynamic diagram corresponding to the traffic light road;
step four, dividing each road into blocking molecules according to each point on the population distribution thermodynamic diagram, namely data point position change data, and obtaining the road section congestion rate according to the road area and the blocking molecule area;
fifthly, adjusting the time length of the traffic lights according to the congestion rate of the road faced by the traffic lights;
the first step to the fifth step comprise: drawing a traffic light network diagram in the selected area, and then dynamically adjusting the time length of the traffic light on the traffic light network diagram by combining a real-time population distribution thermodynamic diagram on the traffic light network diagram; calculating the road section congestion rate of the road section corresponding to each traffic light, and when the road section congestion rate exceeds a third threshold value, calling the road section congestion rate as a congested traffic light; when the congestion rate of the road section is lower than a fourth threshold value, the traffic light is called as an idle traffic light; traffic lights adjacent to the congestion traffic lights are called first-layer congestion nodes, and traffic lights adjacent to the congestion traffic lights outside the first-layer congestion nodes are called second-layer congestion nodes; the traffic light adjacent to the idle traffic light is called a first idle node, and the adjacent traffic light outside the first idle node is called a second idle node; the first-layer congestion node and the first idle node are intersected, the intersection point of the first-layer congestion node and the first idle node is used as a dredging point, the red light duration of the upstream dredging point of the travel is prolonged, the green light duration of the downstream dredging point of the travel is prolonged, and the traffic congestion in the drawing selection area is effectively relieved; and implementing traffic light delay schemes with different proportions on the first-layer congestion node and the second-layer congestion node.
2. The method of claim 1, wherein each point of the population distribution thermodynamic diagram has cell phone signaling data, the cell phone signaling data comprising a cell phone IMSI number, a timestamp, and a location area number.
3. The method for controlling duration of a traffic light according to claim 1, wherein the road segment congestion rate is a quotient of a blocked molecular area divided by a road area.
4. The method of claim 1, wherein the clogging molecules are determined by perimeter mapping based on a data point distribution of a real-time thermodynamic diagram.
5. The method of controlling a duration of a traffic light according to claim 4, wherein the congestion molecule is a bus, a car, a minibus.
6. Method for controlling the duration of a traffic light according to claim 1, characterized in that for three consecutive traffic lights: a first traffic light, a second traffic light and a third traffic light; and when the road section congestion rate of the second traffic light exceeds a second threshold value, prolonging the red light time of the first traffic light and prolonging the green light time of the third traffic light.
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| CN113240676B (en) * | 2021-07-13 | 2021-10-15 | 深圳奥雅设计股份有限公司 | Intelligent regulation and control method and system of intelligent street lamp based on big data |
| CN115311857B (en) * | 2022-08-05 | 2023-07-25 | 大连海事大学 | Road information networking method |
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