CN106504532B - Method and device for determining upstream signal control point position - Google Patents
Method and device for determining upstream signal control point position Download PDFInfo
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- CN106504532B CN106504532B CN201610986723.2A CN201610986723A CN106504532B CN 106504532 B CN106504532 B CN 106504532B CN 201610986723 A CN201610986723 A CN 201610986723A CN 106504532 B CN106504532 B CN 106504532B
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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
- G08G1/0125—Traffic data processing
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- G—PHYSICS
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- 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
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count
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Abstract
The embodiment of the invention provides a method and a device for determining an upstream signal control point position, which relate to the field of intelligent traffic and comprise the following steps: and determining the position of the congestion point, and acquiring the traffic traveling volume of all the upstream paths in the congestion point setting range in the set time period. And analyzing the traffic volume of all the paths to determine the congestion path related to the congestion point. And determining a signal control point position at the upstream of the congestion point according to the congestion path related to the congestion point, wherein the signal control point position is the position of an upstream intersection of the congestion path related to the congestion point. When the signal control point location is determined, the traffic jam path is determined by analyzing vehicles entering the traffic jam point on the basis of the data of passing vehicles through the vehicle at the traffic entrance, so that the signal control point location is obtained without depending on artificial experience, on one hand, the operation process is simplified, and on the other hand, the timeliness and effectiveness of traffic regulation and control are improved.
Description
Technical Field
The embodiment of the invention relates to the field of intelligent traffic, in particular to a method and a device for determining an upstream signal control point position.
Background
With the rapid development and progress of cities, the quantity of motor vehicles kept is continuously increased, and traffic congestion becomes a main problem affecting smooth operation of the cities. When the congestion occurs, if the traffic is not regulated in time, a lot of adverse effects are generated on the traffic, and even traffic paralysis in partial areas is caused. At this time, effective measures need to be taken to reasonably control traffic signals, so that traffic is dredged as fast as possible, and further aggravation of congestion is avoided. In the prior art, signal control point positions are mainly determined manually and traffic dispersion is carried out, and experienced technicians can reasonably disperse signals of related intersections through control. However, this manual control method is complicated, repetitive, and has poor timeliness, and especially for inexperienced operators, the situation is more serious.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining an upstream signal control point location, which are used for solving the problems of complex operation, repetition and poor timeliness existing in the prior art for manually determining the signal control point location.
The embodiment of the invention provides a method and a device for determining an upstream signal control point position, which comprises the following steps:
determining the position of a congestion point;
acquiring traffic volume of all upstream paths in the congestion point setting range in a set time period;
analyzing the traffic volume of all the paths to determine a congestion path related to the congestion point;
and determining a signal control point position at the upstream of the congestion point according to the congestion path related to the congestion point, wherein the signal control point position is the position of an upstream intersection of the congestion path related to the congestion point.
Optionally, the analyzing the traffic traveling volume of all the routes to determine the congestion route related to the congestion point includes:
taking the congestion point as an analysis position;
determining a direct upstream path of the analysis position from all paths upstream of the set range;
acquiring traffic volume of the direct connection upstream path aiming at each direct connection upstream path, and determining whether the sum of the traffic volume of the direct connection upstream path and the traffic volume of all the direct connection upstream paths at the analysis position meets a set congestion threshold value; if the congestion point meets the set congestion threshold, determining the direct-connected upstream path as a congestion path related to the congestion point; and taking the upstream intersection of the directly-connected upstream path as an analysis position, and returning to the step of determining the directly-connected upstream path of the analysis position from all paths at the upstream of the set range until the analysis of the upstream path in the set range is finished.
Optionally, determining whether a sum of the traffic volume of the direct connection upstream path and the traffic volume of all the direct connection upstream paths at the analysis position meets a set congestion threshold includes:
determining the ratio of the traffic volume of the directly connected upstream path to the sum of the traffic volumes of all directly connected upstream paths of the analysis position;
and if the ratio is larger than the set congestion threshold, the set congestion threshold is met, otherwise, the set congestion threshold is not met.
Optionally, the ratio conforms to the following equation (1):
S＝ODi/∑ODi……………………………………………(1)
wherein S is a ratio, ODiTraffic volume, Σ OD, for directly connecting upstream pathsiTo analyze the sum of the traffic volumes of all upstream paths of a location, i is a positive integer.
Optionally, after determining the signal control point position upstream of the congestion point according to the congestion path related to the congestion point, the method further includes:
and inquiring r intersections from the upstream of the upstream signal control point by taking the upstream signal control point as a starting point, and determining the upstream guidance screen control point of the congestion point, wherein r is an integer.
Correspondingly, an embodiment of the present invention further provides a device for determining an upstream signal control point location, including:
the determining module is used for determining the position of the congestion point;
the acquisition module is used for acquiring traffic volume of all upstream paths in the congestion point setting range in a set time period;
the analysis module is used for analyzing the traffic of all the paths and determining the congestion path related to the congestion point;
and the processing module is used for determining a signal control point position at the upstream of the congestion point according to the congestion path related to the congestion point, wherein the signal control point position is the position of an upstream intersection of the congestion path related to the congestion point.
Optionally, the analysis module is specifically configured to:
taking the congestion point as an analysis position;
determining a direct upstream path of the analysis position from all paths upstream of the set range;
acquiring traffic volume of the direct connection upstream path aiming at each direct connection upstream path, and determining whether the sum of the traffic volume of the direct connection upstream path and the traffic volume of all the direct connection upstream paths at the analysis position meets a set congestion threshold value; if the congestion point meets the set congestion threshold, determining the direct-connected upstream path as a congestion path related to the congestion point; and taking the upstream intersection of the directly-connected upstream path as an analysis position, and returning to the step of determining the directly-connected upstream path of the analysis position from all paths at the upstream of the set range until the analysis of the upstream path in the set range is finished.
Optionally, the analysis module is specifically configured to:
determining the ratio of the traffic volume of the directly connected upstream path to the sum of the traffic volumes of all directly connected upstream paths of the analysis position;
and if the ratio is larger than the set congestion threshold, the set congestion threshold is met, otherwise, the set congestion threshold is not met.
Optionally, the analysis module is specifically configured to:
the ratio corresponds to the following formula (1):
S＝ODi/∑ODi……………………………………………(1)
wherein S is a ratio, ODiTraffic volume, Σ OD, for directly connecting upstream pathsiTo analyze the sum of the traffic volumes of all upstream paths of a location, i is a positive integer.
Optionally, the processing module is further configured to:
and inquiring r intersections from the upstream of the upstream signal control point by taking the upstream signal control point as a starting point, and determining the upstream guidance screen control point of the congestion point, wherein r is an integer.
The embodiment of the invention shows that the position of the congestion point is determined, the traffic volume of all the upstream paths in the congestion point setting range in the set time period is obtained, and then the traffic volume of all the paths is analyzed to determine the congestion path related to the congestion point. And finally, determining a signal control point position at the upstream of the congestion point according to the congestion path related to the congestion point, wherein the signal control point position is the signal control point at the position of the upstream intersection of the congestion path related to the congestion point. In the embodiment of the invention, when the signal control point location is determined, the traffic jam path is determined by analyzing the vehicles entering the traffic jam point on the basis of the data of passing vehicles at the traffic entrance, so that the signal control point location is obtained without depending on artificial experience, on one hand, the operation process is simplified, and on the other hand, the timeliness and effectiveness of traffic regulation are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flowchart of a method for determining an upstream signal control point according to an embodiment of the present invention;
fig. 2 is a network topology diagram of a congestion point according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating another method for determining an upstream signal control point according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for determining an upstream signal control point according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 schematically shows a flow of a method for determining an upstream signal control point location according to an embodiment of the present invention, where the flow may be performed by an apparatus for determining an upstream signal control point location.
As shown in fig. 1, the specific steps of the process include:
step S101, the position of the congestion point is determined.
Step S102, acquiring traffic traveling volume of all upstream paths in a congestion point setting range in a set time period.
And step S103, analyzing the traffic volume of all the routes, and determining the congestion route related to the congestion point.
And step S104, determining the signal control point at the upstream of the congestion point according to the congestion path related to the congestion point.
Specifically, in step S101 and step S102, the congestion point refers to a position where traffic congestion occurs, and in a specific implementation, the congestion point may be a traffic intersection or a specific road segment, and the congestion point may be determined manually. The traffic running amount of the path refers to the number of vehicles entering or leaving the intersection or the congestion point within a set time threshold. The path of the congestion point includes an upstream path and a downstream path, and the network topology of the path is shown in fig. 2. The upstream route of the congestion point refers to a route where the vehicle enters the congestion point, such as route 1, route 2, and route 3 in fig. 2. The path downstream of the congestion point refers to a path where the vehicle leaves the congestion point, such as path 4, path 5, and path 6 in fig. 2. After the congestion point is determined, vehicle data entering the congestion point can be obtained from the vehicle passing data of the gate at the upstream intersection of the congestion point, and meanwhile, the upstream path from which the vehicles entering the congestion point enter the congestion point can be determined, so that the traffic traveling volume of the corresponding upstream path can be obtained. Similarly, vehicle data leaving the congestion point can be obtained from the vehicle passing data of the gates at the downstream intersections of the congestion point, so that the downstream paths from which the vehicles leaving the congestion point leave the congestion point can be determined, and the traffic volume of the corresponding downstream paths can be obtained. The setting time for acquiring the traffic traveling volume of the upstream route or the downstream route may be set according to specific conditions, such as 10 minutes, 30 minutes, or one hour, and similarly, the congestion point setting range may be set according to specific conditions, such as 500m, 1000m, or the like.
In step S103, the congestion route related to the congestion point can be determined by analyzing the traffic travel amounts of all the routes acquired in step S102, and the specific process is as follows:
and taking the congestion point as an analysis position. And determining direct connection upstream paths of the analysis position from all the paths at the upstream of the set range, and then acquiring the traffic traveling volume of the direct connection upstream paths for each direct connection upstream path. And then determining whether the sum of the traffic volume of the direct connection upstream path and the traffic volume of all the direct connection upstream paths at the analysis position meets a set congestion threshold value. If the set congestion threshold is met, determining a direct connection upstream path as a congestion path related to a congestion point, and taking an upstream intersection of the direct connection upstream path as an analysis position, returning to the step of determining the direct connection upstream path of the analysis position from all paths at the upstream of the set range until the analysis of the upstream path of the set range is finished, wherein the set congestion threshold can be set according to specific conditions, such as 10%, 50% and the like, and the direct connection upstream path refers to an upstream path directly connected with the analysis position, such as path 1, path 2 and path 3 in fig. 2. In the analysis process, before determining whether the sum of the traffic volume of the directly-connected upstream path and the traffic volume of all the directly-connected upstream paths at the analysis position meets a set congestion threshold, calculating the ratio of the traffic volume of the directly-connected upstream path to the sum of the traffic volume of all the directly-connected upstream paths at the analysis position, and then judging whether the ratio is greater than the set congestion threshold, if so, meeting the set congestion threshold, otherwise, not meeting the set congestion threshold. The ratio of the traffic travel volume of the directly connected upstream path to the sum of the traffic travel volumes of all directly connected upstream paths of the analysis position conforms to the following formula (1):
S＝ODi/∑ODi……………………………………………(1)
wherein S is a ratio, ODiTraffic volume, Σ OD, for directly connecting upstream pathsiTo analyze the sum of the traffic volumes of all upstream paths of a location, i is a positive integer.
To more clearly describe the analysis process in step S103, the embodiment of the present invention provides the following example, and the setting range of the congestion point is set to 1000 m. If the time of the congestion point is determined to be T, setting the time period to be T-T, T]Wherein T is 30 minutes. Firstly, the number of vehicles entering the congestion point in a set time period is obtained by taking the congestion point as an analysis position, the number of vehicles entering the congestion point in the time period is set to be 100, and the vehicles respectively enter the congestion point from a path 1, a path 2 and a path 3 in a direct-connection upstream path of the congestion point. Assume that the numbers of vehicles entering the congestion point from route 1, route 2, and route 3 within the set period of time are 10, 30, and 60, respectively. Calculating the ratio of the traffic volume of the path 1 to the sum of the traffic volumes of all directly-connected upstream paths of the congestion point according to a formula (1), specifically S110/100-10%. In the same way, the ratio S of the traffic volume of the path 2 to the sum of the traffic volumes of all the directly-connected upstream paths of the congestion point can be obtained230/100-30%. The ratio S of the traffic volume of the path 3 to the sum of the traffic volumes of all the directly connected upstream paths of the congestion point360/100-60%. Setting the congestion threshold to 10%, due to S1Not greater than 10%, then Path 1 is not a congested path associated with a congested point. Due to S2If the traffic congestion point is more than 10%, the path 2 is a congestion path related to the congestion point, and the same is true for S3And > 10%, the path 3 is a congestion path associated with the congestion point. Further, the analysis is continued with the upstream intersection of the path 2 and the path 3 as the analysis position. The analysis continues with the upstream intersection of the path 2 as an example, and the analysis method of the path 3 is the same as the analysis method of the path 2, and is not described again here. First, it is determined whether the position of the upstream intersection of the route 2 from the congestion point is smaller than the set range 1000m of the congestion point. If the number of vehicles entering the upstream intersection of the path 2 is smaller than the set range of the congestion point, acquiring the number of vehicles entering the upstream intersection of the path 2, ensuring a direct-connection upstream path corresponding to the upstream intersection of the path 2, and utilizing the same method for analyzing the congestion point direct-connection upstream pathA congested path associated with an intersection upstream of path 2 is determined. And if the traffic jam point is not smaller than the set range of the traffic jam point, the direct connection upstream path of the upstream intersection of the path 2 is not analyzed. Since the congestion route at the intersection upstream of the route 2 ultimately affects the congestion point, the congestion route at the intersection upstream of the route 2 is the congestion route at the congestion point. After the congested route related to the upstream intersection of the route 2 or the route 3 is obtained, the analysis of the upstream intersection of the congested route related to the upstream intersection of the route 2 or the route 3 may be continued in the same manner until the analysis of the upstream routes within the set range is completed.
In step S104, after the congestion path related to the congestion point is determined, the position at which the intersection upstream of the congestion path related to the congestion point is located is determined as the signal control point. For example, if the route 2 and the route 3 are congestion routes related to congestion points in step S103, positions of intersections upstream of the route 2 and the route 3 are determined as signal control points. Therefore, the traffic flow control center can scientifically control the traffic signals according to the determined signal control point positions, so that the congestion points are quickly and effectively dredged.
Optionally, after determining the signal control point location upstream of the congestion point according to the congestion path related to the congestion point, querying r intersections upstream of the upstream signal control point location with the upstream signal control point location as a starting point, and then determining the guidance screen control point location upstream of the congestion point, where r is an integer. The guidance screen is a display screen for traffic guidance, and the guidance screen can be positioned in the middle of a path or at an intersection. After the guidance screen is queried, the queried position of the guidance screen can be used as the guidance screen control point position. Therefore, the traffic flow control center can display the congestion path related to the congestion point on the guidance screen, so that a vehicle driver knows the road conditions near the congestion point after seeing the guidance screen, and then takes detour driving, thereby relieving the congestion of the congestion point.
For better explaining the embodiment of the present invention, the following describes a flow of a method for determining an upstream signal control point provided by the embodiment of the present invention through a specific implementation scenario.
As shown in fig. 3, the method comprises the steps of:
in step S301, the position of the congestion point is determined.
In step S302, the congestion point setting range is set to W.
In step S303, a congestion threshold E is set with the congestion point as the analysis position.
Step S304, counting [ T-T1, T]Traffic volume OD of n directly-connected upstream paths entering analysis position in time periodi，OD2，...，ODn。
Step S305, determining ODi/∑ODiIf > E is true, wherein ODiIf the traffic volume of any one of the n directly-connected upstream routes entering the analysis position is the traffic volume, executing step S307, otherwise executing step S306.
Step S306, will not satisfy ODi/∑ODiA route > E is determined to be a non-congested route.
Step S307, OD will be satisfiedi/∑ODiThe path with the value of > E is determined as a congestion path, and an intersection at the upstream of the congestion path is used as an analysis position and an upstream signal control point.
Step S308, determining whether the distance from the analysis position to the congestion point is greater than W, if yes, performing step S309, otherwise, performing step 304.
Step S309 ends.
As can be seen from the above, embodiments of the present invention provide a method and an apparatus for determining an upstream signal control point, where a position of a congestion point is determined, traffic volume of all upstream paths within a set congestion point range within a set time period is obtained, traffic volume of all the upstream paths is analyzed, a congestion path related to the congestion point is determined, and finally, a signal control point upstream of the congestion point is determined according to the congestion path related to the congestion point, where the signal control point is located at an upstream intersection of the congestion path related to the congestion point. In the embodiment of the invention, when the signal control point location is determined, the traffic jam path is determined by analyzing the vehicles entering the traffic jam point on the basis of the data of passing vehicles at the traffic entrance, so that the signal control point location is obtained without depending on artificial experience, on one hand, the operation process is simplified, and on the other hand, the timeliness and effectiveness of traffic regulation are improved.
Based on the same conception, fig. 4 exemplarily shows a structure of an apparatus for determining an upstream signal control point location provided by an embodiment of the present invention, and the apparatus can execute a procedure for determining the upstream signal control point location.
As shown in fig. 4, the apparatus includes:
a determining module 401 is configured to determine a position of the congestion point.
An obtaining module 402, configured to obtain traffic traveling volumes of all upstream routes within the congestion point setting range in a set time period.
An analysis module 403, configured to analyze traffic traveling quantities of all the routes to determine a congestion route related to the congestion point.
The processing module 404 is configured to determine a signal control point located upstream of the congestion point according to the congestion path related to the congestion point, where the signal control point is located at an upstream intersection of the congestion path related to the congestion point.
Optionally, the analysis module 403 is specifically configured to:
and taking the congestion point as an analysis position.
Determining a directly-connected upstream path of the analysis position from all paths upstream of the set range.
And acquiring the traffic volume of the direct connection upstream path aiming at each direct connection upstream path, and determining whether the sum of the traffic volume of the direct connection upstream path and the traffic volume of all the direct connection upstream paths at the analysis position meets a set congestion threshold value. And if the set congestion threshold is met, determining the direct connection upstream path as a congestion path related to the congestion point, and taking an upstream intersection of the direct connection upstream path as an analysis position, returning to the step of determining the direct connection upstream path of the analysis position from all paths at the upstream of the set range until the analysis of the upstream path of the set range is finished.
Optionally, the analysis module 403 is specifically configured to:
and determining the ratio of the traffic volume of the directly-connected upstream path to the sum of the traffic volumes of all directly-connected upstream paths of the analysis position.
And if the ratio is larger than the set congestion threshold, the set congestion threshold is met, otherwise, the set congestion threshold is not met.
Optionally, the analysis module 403 is specifically configured to:
the ratio corresponds to the following formula (1):
S＝ODi/∑ODi……………………………………………(1)
wherein S is a ratio, ODiTraffic volume, Σ OD, for directly connecting upstream pathsiTo analyze the sum of the traffic volumes of all upstream paths of a location, i is a positive integer.
Optionally, the processing module 404 is further configured to:
and inquiring r intersections from the upstream of the upstream signal control point by taking the upstream signal control point as a starting point, and determining the upstream guidance screen control point of the congestion point, wherein r is an integer.
It should be apparent to those skilled in the art that embodiments of the present invention may be provided as a method, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A method of determining an upstream signal control point location, comprising:
determining the position of a congestion point;
acquiring traffic volume of all upstream paths in the congestion point setting range in a set time period;
taking the congestion point as an analysis position;
determining a direct upstream path of the analysis position from all paths upstream of the set range;
acquiring traffic volume of the direct connection upstream path aiming at each direct connection upstream path, and determining whether the sum of the traffic volume of the direct connection upstream path and the traffic volume of all the direct connection upstream paths at the analysis position meets a set congestion threshold value; if the congestion point meets the set congestion threshold, determining the direct-connected upstream path as a congestion path related to the congestion point; taking the upstream intersection of the directly-connected upstream path as an analysis position, and returning to the step of determining the directly-connected upstream path of the analysis position from all paths at the upstream of the set range until the analysis of the upstream path of the set range is finished;
and determining a signal control point position at the upstream of the congestion point according to the congestion path related to the congestion point, wherein the signal control point position is the position of an upstream intersection of the congestion path related to the congestion point.
2. The method of claim 1, wherein determining whether a sum of the traffic volume of the direct upstream path and the traffic volume of all direct upstream paths of the analysis location satisfies a set congestion threshold comprises:
determining the ratio of the traffic volume of the directly connected upstream path to the sum of the traffic volumes of all directly connected upstream paths of the analysis position;
and if the ratio is larger than the set congestion threshold, the set congestion threshold is met, otherwise, the set congestion threshold is not met.
3. The method of claim 2, wherein the ratio is in accordance with the following equation (1):
S＝ODi/∑ODi……………………………………………(1)
wherein S is a ratio, ODiTraffic volume, Σ OD, for directly connecting upstream pathsiTo analyze the sum of the traffic volumes of all upstream paths of a location, i is a positive integer.
4. The method as claimed in claim 1, wherein after determining the signal control point upstream of the congestion point according to the congestion path associated with the congestion point, the method further comprises:
and inquiring r intersections from the upstream of the upstream signal control point by taking the upstream signal control point as a starting point, and determining the upstream guidance screen control point of the congestion point, wherein r is an integer.
5. An apparatus for determining an upstream signal control point location, comprising:
the determining module is used for determining the position of the congestion point;
the acquisition module is used for acquiring traffic volume of all upstream paths in the congestion point setting range in a set time period;
the analysis module is used for taking the congestion point as an analysis position; determining a direct upstream path of the analysis position from all paths upstream of the set range; acquiring traffic volume of the direct connection upstream path aiming at each direct connection upstream path, and determining whether the sum of the traffic volume of the direct connection upstream path and the traffic volume of all the direct connection upstream paths at the analysis position meets a set congestion threshold value; if the congestion point meets the set congestion threshold, determining the direct-connected upstream path as a congestion path related to the congestion point; taking the upstream intersection of the directly-connected upstream path as an analysis position, and returning to the step of determining the directly-connected upstream path of the analysis position from all paths at the upstream of the set range until the analysis of the upstream path of the set range is finished;
and the processing module is used for determining a signal control point position at the upstream of the congestion point according to the congestion path related to the congestion point, wherein the signal control point position is the position of an upstream intersection of the congestion path related to the congestion point.
6. The apparatus of claim 5, wherein the analysis module is specifically configured to:
determining the ratio of the traffic volume of the directly connected upstream path to the sum of the traffic volumes of all directly connected upstream paths of the analysis position;
and if the ratio is larger than the set congestion threshold, the set congestion threshold is met, otherwise, the set congestion threshold is not met.
7. The apparatus of claim 6, wherein the analysis module is specifically configured to:
the ratio corresponds to the following formula (1):
S＝ODi/∑ODi……………………………………………(1)
wherein S is a ratio, ODiTraffic volume, Σ OD, for directly connecting upstream pathsiTo analyze the sum of the traffic volumes of all upstream paths of a location, i is a positive integer.
8. The apparatus of claim 5, wherein the processing module is further to:
and inquiring r intersections from the upstream of the upstream signal control point by taking the upstream signal control point as a starting point, and determining the upstream guidance screen control point of the congestion point, wherein r is an integer.
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| US8855900B2 (en) * | 2011-07-06 | 2014-10-07 | International Business Machines Corporation | System and method for self-optimizing traffic flow using shared vehicle information |
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| CN105654741B (en) * | 2016-01-26 | 2018-07-17 | 浙江大学 | A kind of upstream region signal Optimization about control parameter method towards "bottleneck" |
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