CN106504531A - A kind of method and apparatus for determining downstream signal control point position - Google Patents
A kind of method and apparatus for determining downstream signal control point position Download PDFInfo
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- CN106504531A CN106504531A CN201610986547.2A CN201610986547A CN106504531A CN 106504531 A CN106504531 A CN 106504531A CN 201610986547 A CN201610986547 A CN 201610986547A CN 106504531 A CN106504531 A CN 106504531A
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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
- 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
- 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 present invention provides a kind of method and apparatus for determining downstream signal control point position, is related to intelligent transportation field, including：Determine the position of congestion points, the traffic trip amount in all paths in the downstream in acquisition setting time section in congestion points set point.The traffic trip amount in all paths is analyzed, is determined and related to congestion points is dredged path.According to the signal control point position that path determines the downstream of congestion points of dredging related to congestion points, signal control point position is the position that the downstream road junction for dredging path related to congestion points is located.Due to when signal control point position is determined, based on car data is crossed by bayonet socket, the vehicle that congestion points are left by analysis determines dredges path, and then obtain signal control point position, without relying on artificial experience, on the one hand operating process is simplified, on the other hand improves the ageing and effectiveness of traffic control.
Description
Technical field
The present embodiments relate to intelligent transportation field, more particularly to a kind of method for determining downstream signal control point position and
Device.
Background technology
With the fast-developing of city and progress, vehicle guaranteeding organic quantity is continuously increased, and traffic congestion has become impact city
The subject matter of the smooth operation in city.When congestion occurs, if regulated and controled not in time, many harmful effects will be produced to traffic, very
To causing subregion traffic paralysis.At this time, it may be necessary to adopt an effective measure rationally be controlled to traffic signal, dredge as soon as possible
Lead traffic, it is to avoid congestion is further exacerbated by.Mainly determine signal control point position and handed over by artificial in prior art
Lead to and dredge, for skilled engineer, can be compared and reasonably dredge by the control to related crossing signals.
But this artificial control mode is cumbersome, repeat, promptness is poor, especially for inexperienced operator for, situation is more
Plus it is serious.
Content of the invention
The embodiment of the present invention provides a kind of method and apparatus for determining downstream signal control point position, in order to solve prior art
In artificial determine that signal control point position is present cumbersome, repeat, the problem of promptness difference.
A kind of method and apparatus for determining downstream signal control point position is embodiments provided, including：
Determine the position of congestion points；
The traffic trip amount in all paths in the downstream in acquisition setting time section in the congestion points set point；
The traffic trip amount in all paths is analyzed, is determined and related to the congestion points is dredged path；
According to described related to the congestion points dredge the signal control point position that path determines the downstream of the congestion points,
Signal control point position is the position that the downstream road junction for dredging path related to the congestion points is located.
Alternatively, the traffic trip amount to all paths is analyzed, and determines related to the congestion points
Dredge path, including：
With the congestion points as analysis position；
The direct-connected path downstream of the analysis position is determined from all paths in the downstream of the set point；
For the direct-connected path downstream per bar, obtain the traffic trip amount of the direct-connected path downstream, determine described direct-connected under
The traffic trip amount in trip path is set with whether the traffic trip amount sum of all direct-connected path downstream of the analysis position meets
Surely dredge threshold value and the direct-connected path downstream is unobstructed；If meeting, threshold value is dredged in setting and the direct-connected path downstream is unobstructed,
It is defined as related to the congestion points dredging path by the direct-connected path downstream；And the downstream with the direct-connected path downstream
Crossing is analysis position, returns to the direct-connected downstream for determining the analysis position from all paths in the downstream of the set point
The step of path, until the path downstream of the set point is analyzed and is terminated.
Optionally it is determined that all direct-connected downstream road of the traffic trip amount of the direct-connected path downstream and the analysis position
Whether the traffic trip amount sum in footpath meets setting is dredged threshold value, including：
Determine the friendship of the traffic trip amount of the direct-connected path downstream and all direct-connected path downstream of the analysis position
The ratio of logical travel amount sum；
If the ratio dredges threshold value more than described setting, meet described setting and dredge threshold value, be otherwise unsatisfactory for described
Threshold value is dredged in setting.
Alternatively, the ratio meets following formula (1)：
S=ODi/∑ODi……………………………………………(1)
Wherein, S is ratio, ODiFor the traffic trip amount of direct-connected path downstream, ∑ ODiAll downstream roads for analysis position
The traffic trip amount sum in footpath, i is positive integer.
Alternatively, the downstream that path determines the congestion points is dredged related to the congestion points described in the basis
After the position of signal control point, also include：
As starting point, the upper stream queries r to the signal control point position in the downstream is individual for signal control point position with the downstream
Crossing, determines the induced screen control point position in the downstream of the congestion points, and wherein r is integer.
Correspondingly, the embodiment of the present invention additionally provides a kind of device for determining downstream signal control point position, including：
Determining module, for determining the position of congestion points；
Acquisition module, for obtaining the friendship in all paths in the downstream in setting time section in the congestion points set point
Logical travel amount；
Analysis module, for being analyzed to the traffic trip amount in all paths, determines and the congestion points phase
Closed dredges path；
Processing module, for related to the congestion points dredging the downstream that path determines the congestion points according to described
Signal control point position, signal control point position are that the downstream road junction for dredging path related to the congestion points is located
Position.
Alternatively, the analysis module specifically for：
With the congestion points as analysis position；
The direct-connected path downstream of the analysis position is determined from all paths in the downstream of the set point；
For the direct-connected path downstream per bar, obtain the traffic trip amount of the direct-connected path downstream, determine described direct-connected under
The traffic trip amount in trip path is set with whether the traffic trip amount sum of all direct-connected path downstream of the analysis position meets
Surely dredge threshold value and the direct-connected path downstream is unobstructed；If meeting, threshold value is dredged in setting and the direct-connected path downstream is unobstructed,
It is defined as related to the congestion points dredging path by the direct-connected path downstream；And the downstream with the direct-connected path downstream
Crossing is analysis position, returns to the direct-connected downstream for determining the analysis position from all paths in the downstream of the set point
The step of path, until the path downstream of the set point is analyzed and is terminated.
Alternatively, the analysis module specifically for：
Determine the friendship of the traffic trip amount of the direct-connected path downstream and all direct-connected path downstream of the analysis position
The ratio of logical travel amount sum；
If the ratio dredges threshold value more than described setting, meet described setting and dredge threshold value, be otherwise unsatisfactory for described
Threshold value is dredged in setting.
Alternatively, the analysis module specifically for：
The ratio meets following formula (1)：
S=ODi/∑ODi……………………………………………(1)
Wherein, S is ratio, ODiFor the traffic trip amount of direct-connected path downstream, ∑ ODiAll downstream roads for analysis position
The traffic trip amount sum in footpath, i is positive integer.
Alternatively, the processing module is additionally operable to：
As starting point, the upper stream queries r to the signal control point position in the downstream is individual for signal control point position with the downstream
Crossing, determines the induced screen control point position in the downstream of the congestion points, and wherein r is integer.
The embodiment of the present invention shows, it is first determined the position of congestion points simultaneously obtains congestion points set point in setting time section
The traffic trip amount in all paths in interior downstream, is then analyzed to the traffic trip amount in all paths, determines and gathers around
What stifled point was related dredges path.The signal control point that path determines the downstream of congestion points is dredged finally according to related to congestion points
Position, wherein signal control point position are the position that the downstream road junction for dredging path related to congestion points is located.The embodiment of the present invention
In, as when signal control point position is determined, based on crossing car data by bayonet socket, the vehicle for leaving congestion points by analysis determines
Path is dredged, and then obtains signal control point position, without relying on artificial experience, on the one hand simplify operating process, another
Aspect improves the ageing and effectiveness of traffic control.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, without having to pay creative labor, can be obtaining which according to these accompanying drawings
His accompanying drawing.
Fig. 1 is a kind of schematic flow sheet of method for determining downstream signal control point position provided in an embodiment of the present invention；
Fig. 2 is the network topological diagram of congestion points provided in an embodiment of the present invention；
Fig. 3 is the schematic flow sheet of another kind of method for determining downstream signal control point position provided in an embodiment of the present invention；
Fig. 4 is a kind of structural representation of device for determining downstream signal control point position provided in an embodiment of the present invention.
Specific embodiment
In order that the purpose of the present invention, technical scheme and beneficial effect become more apparent, below in conjunction with accompanying drawing and enforcement
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only in order to explaining this
Bright, it is not intended to limit the present invention.
Fig. 1 examples show a kind of flow process of method for determining downstream signal control point position provided in an embodiment of the present invention,
The flow process can be executed by the device for determining downstream signal control point position.
As shown in figure 1, the concrete steps of the flow process include：
Step S101, determines the position of congestion points.
Step S102, the traffic trip in all paths in the downstream in acquisition setting time section in congestion points set point
Amount.
Step S103, is analyzed to the traffic trip amount in all paths, determines and related to congestion points dredges path.
Step S104, dredges the signal control point position that path determines the downstream of congestion points according to related to congestion points.
Specifically, in step S101 and step S102, congestion points refer to the position that traffic congestion occurs, and gather around in being embodied as
Stifled point can be traffic intersection, or concrete section, and congestion points can be by manually determining.The traffic trip amount in path refers to and sets
The vehicle number of crossing or congestion points is entered or is left in threshold value of fixing time.The path of congestion points includes upstream path and downstream road
Footpath, its network topological diagram are as shown in Figure 2.The upstream path of congestion points refers to that vehicle enters the path of congestion points, the path in such as Fig. 2
1st, path 2, path 3.The path downstream of congestion points refers to that vehicle leaves the path of congestion points, the path 4, path 5, road in such as Fig. 2
Footpath 6.After congestion points are determined, cross the vehicle that can obtain that congestion points are entered in car data from the bayonet socket of the upstream crossing of congestion points
Data, while can determine the vehicle for entering congestion points enters congestion points respectively from which bar upstream path, so as to be corresponded to
Upstream path traffic trip amount.Same mistake from the bayonet socket of the downstream road junction of congestion points leaves congestion
The vehicle data of point, may thereby determine that the vehicle for leaving congestion points is from which bar path downstream to leave congestion points respectively, enters
And obtain the traffic trip amount of corresponding path downstream.Obtain the setting time of the traffic trip amount of upstream path or path downstream
Can set as the case may be, such as 10 minutes, 30 minutes or a hour etc., likewise, congestion points set point also may be used
To set as the case may be, such as 500m, 1000m etc..
In step s 103, being analyzed by the traffic trip amount to all paths for obtaining in step s 102 can be with
The path of dredging related to congestion points is determined, detailed process is as follows：
With the congestion points as analysis position.The direct-connected of analysis position is determined from all paths in the downstream of set point
Path downstream, is then directed to per bar direct-connected path downstream, obtains the traffic trip amount of direct-connected path downstream.It is then determined that under direct-connected
The traffic trip amount in trip path is dredged with whether the traffic trip amount sum of all direct-connected path downstream of analysis position meets setting
Lead threshold value and direct-connected path downstream is unobstructed.If meeting, threshold value is dredged in setting and direct-connected path downstream is unobstructed, by direct-connected downstream road
Footpath is defined as the path of dredging related to congestion points, and with the downstream road junction of direct-connected path downstream as analysis position, returns from setting
In all paths in the downstream for determining scope the step of the direct-connected path downstream of determination analysis position, until the downstream road of set point
Footpath is analyzed and is terminated, and wherein setting is dredged threshold value and can be set as the case may be, and such as 10%, 50% etc., direct-connected downstream road
Footpath refers to the path downstream being joined directly together with analysis position, path 4, path 5 in such as Fig. 2, path 6.Process in analysis
In, determine that the traffic trip amount sum of the traffic trip amount of direct-connected path downstream and all direct-connected path downstream of analysis position is
No meet before setting dredges threshold value, the traffic trip amount of direct-connected path downstream and all direct-connected downstream of analysis position need to be calculated
The ratio of the traffic trip amount sum in path, then judges whether the ratio dredges threshold value more than setting, if so, then meets and sets
Surely threshold value is dredged, setting is otherwise unsatisfactory for and is dredged threshold value.The traffic trip amount of direct-connected path downstream is all straight with analysis position
Even the ratio of the traffic trip amount sum of path downstream meets following formula (1)：
S=ODi/∑ODi……………………………………………(1)
Wherein, S is ratio, ODiFor the traffic trip amount of direct-connected path downstream, ∑ ODiAll downstream roads for analysis position
The traffic trip amount sum in footpath, i is positive integer.
In order to more clearly introduce the analysis process in step S103, the embodiment of the present invention provides the example below, sets
The set point of congestion points is 1000m.If it is determined that the moment of congestion points be t, then setting time section be [t, t+T], wherein T=30
Minute.First with congestion points position analysis position, obtain the vehicle number that congestion points are left in setting time section, set in the time period
The vehicle for leaving congestion points is 80, and these vehicles path 4 respectively from the direct-connected path downstream of congestion points, path 5
Congestion points are left with path 6.It is assumed that leaving the vehicle number difference of congestion points in setting time section from path 4, path 5 and path 6
For 6,30 and 44.The traffic trip amount in path 4 and the friendship of all direct-connected path downstreams of congestion points is calculated according to formula (1)
The ratio of logical travel amount sum, specially S4=6/80=7.5%.Can obtain in the same manner, the traffic trip amount in path 5 and congestion points institute
There is the ratio S of the traffic trip amount sum of direct-connected path downstream5=30/80=37.5%.The traffic trip amount in path 6 and congestion
The ratio S of the traffic trip amount sum of all direct-connected path downstreams of point6=44/80=55%.Set threshold value is dredged as 10%, by
In S4No more than 10%, then path 4 is not related to congestion points to dredge path.Due to S5＞ 10% and now road is smooth in path 5
Logical, then path can be dredged as related to congestion points in path 5.S6＞ 10% but now path 6 also occurs in that congestion, therefore
Path 6 can not play a part of to alleviate congestion, so as to path 6 cannot function as related to congestion points dredging path.Further,
Analysis is continued as analysis position with the downstream road junction in path 5.The downstream road junction for first determining whether path 5 apart from the position of congestion points is
The no set point 1000m less than congestion points.If less than the set point of congestion points, obtaining the downstream road junction for leaving path 5
Vehicle number, and the corresponding direct-connected path downstream of downstream road junction in certain path 5, using with the direct-connected path downstream of analysis congestion points
What the determination of identical method was related to the downstream road junction in path 5 dredges path.If not less than the set point of congestion points, no longer
The direct-connected path downstream of the downstream road junction in path 5 is analyzed.It should be noted that due to the downstream road junction phase with path 5
Path finally affects is congestion points for dredging of closing, thus related to the downstream road junction in path 5 dredge path namely with gather around
What stifled point was related dredges path.Obtain related to the downstream road junction in path 5 dredge path after, can be in the same manner
Continue the analysis downstream road junction for dredging path related to the downstream road junction in path 5, until the path downstream of set point is divided equally
Analysis terminates.
In step S104, determine related to congestion points dredge path after, related to congestion points is dredged road
The position that the downstream road junction in footpath is located is defined as signal control point position.For example obtaining path 5 in step S103 is and congestion points phase
Closed dredges path, then the position at the place of the downstream road junction in path 5 is defined as signal control point position.Thus traffic flow regulation and control
Center can be according to the signal control point position Scientific Regulation traffic signal for determining, so as to fast and effeciently dredge congestion points.
Alternatively, according to related to congestion points dredge path determine congestion points downstream signal control point position it
Afterwards, the signal control point position with downstream is as starting point, r crossing of upper stream queries of signal control point position downstream, it is then determined that
Go out the induced screen control point position in the downstream of congestion points, wherein r is integer.Induced screen refers to the display for playing traffic guidance effect
Screen, induced screen are may be located in the middle of path, it is also possible to positioned at crossing.After induced screen is inquired, can be by luring for inquiring
The position at screen place is led as induced screen control point position.Thus related to congestion points can be dredged road by traffic flow regulation and control center
Footpath shows on induced screen, therefore vehicle drivers understand the road conditions near congestion points after induced screen is seen, selects unimpeded path
Congestion points are left, so as to mitigate the congestion of congestion points.
In order to preferably explain the embodiment of the present invention, embodiment of the present invention offer is described below by specific implement scene
A kind of determination downstream signal control point position method flow process.
As shown in figure 3, the method is comprised the following steps：
Step S301, determines the position of congestion points.
Step S302, sets congestion points set point as W.
Step S303, with congestion points as analysis position and sets and dredges threshold value E.
Step S304, counts [t-T1, t] leaves the direct-connected path downstream of n bars of analysis position traffic trip in the time period
Amount ODi, OD2..., ODn.
Step S305, judges ODi/∑ODiWhether ＞ E set up, wherein ODiThe direct-connected downstream road of n bars for leaving analysis position
The traffic trip amount of any one paths in footpath, if so, then execution step S307, otherwise execution step S306.
Step S306, will be unsatisfactory for ODi/ΣODiThe path of ＞ E is defined as non-dredging path.
Step S307, will meet ODi/ΣODi＞ E's and unimpeded path be defined as dredging path and dredging under path
Trip crossing is used as analysis position and downstream signal control point position.
Whether step S308, the distance of discriminatory analysis position to congestion points are more than W, if so, then execution step S309, otherwise
Execution step 304.
Step S309, terminates.
From the above, it is seen that the embodiment of the present invention provides a kind of method for determining downstream signal control point position and dress
Put, it is first determined the position of congestion points and obtain downstream in setting time section in congestion points set point all paths friendship
Logical travel amount, is then analyzed to the traffic trip amount in all paths, determines the path of dredging related to congestion points, finally
The signal control point position that path determines the downstream of congestion points is dredged according to related to congestion points, signal control point position is and congestion
The position that the related downstream road junction for dredging path of point is located.In the embodiment of the present invention, due to determine signal control point position when,
Based on car data is crossed by bayonet socket, path is dredged in the vehicle determination for leaving congestion points by analysis, and then obtains signal control point
Position, without relying on artificial experience, on the one hand simplify operating process, on the other hand improve the ageing of traffic control and
Effectiveness.
Same idea is based on, what Fig. 4 was exemplary shows a kind of determination downstream signal control provided in an embodiment of the present invention
The structure of the device of point position, the device can execute the flow process for determining downstream signal control point position.
As shown in figure 4, the device includes：
Determining module 401, for determining the position of congestion points.
Acquisition module 402, for obtaining all paths in the downstream in setting time section in the congestion points set point
Traffic trip amount.
Analysis module 403, for being analyzed to the traffic trip amount in all paths, determines and the congestion points
Related dredges path.
Processing module 404, for determining under the congestion points according to the path of dredging related to the congestion points
The signal control point position of trip, signal control point position are the downstream road junction institute for dredging path related to the congestion points
Position.
Alternatively, the analysis module 403 specifically for：
With the congestion points as analysis position.
The direct-connected path downstream of the analysis position is determined from all paths in the downstream of the set point.
For the direct-connected path downstream per bar, obtain the traffic trip amount of the direct-connected path downstream, determine described direct-connected under
The traffic trip amount in trip path is set with whether the traffic trip amount sum of all direct-connected path downstream of the analysis position meets
Surely dredge threshold value and the direct-connected path downstream is unobstructed.If meeting, threshold value is dredged in setting and the direct-connected path downstream is unobstructed,
The direct-connected path downstream is defined as the path of dredging related to the congestion points, and the downstream with the direct-connected path downstream
Crossing is analysis position, returns to the direct-connected downstream for determining the analysis position from all paths in the downstream of the set point
The step of path, until the path downstream of the set point is analyzed and is terminated.
Alternatively, the analysis module 403 specifically for：
Determine the friendship of the traffic trip amount of the direct-connected path downstream and all direct-connected path downstream of the analysis position
The ratio of logical travel amount sum.
If the ratio dredges threshold value more than described setting, meet described setting and dredge threshold value, be otherwise unsatisfactory for described
Threshold value is dredged in setting.
Alternatively, the analysis module 403 specifically for：
The ratio meets following formula (1)：
S=ODi/ΣODi……………………………………………(1)
Wherein, S is ratio, ODiFor the traffic trip amount of direct-connected path downstream, ∑ ODiAll downstream roads for analysis position
The traffic trip amount sum in footpath, i is positive integer.
Alternatively, the processing module 404 is additionally operable to：
As starting point, the upper stream queries r to the signal control point position in the downstream is individual for signal control point position with the downstream
Crossing, determines the induced screen control point position in the downstream of the congestion points, and wherein r is integer.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method or computer program.
Therefore, the present invention can adopt complete hardware embodiment, complete software embodiment or with reference to software and hardware in terms of embodiment
Form.And, the present invention can be adopted to can use in one or more computers for wherein including computer usable program code and be deposited
The shape of the upper computer program that implements of storage media (including but not limited to disk memory, CD-ROM, optical memory etc.)
Formula.
The present invention is the flow process with reference to method according to embodiments of the present invention, equipment (system) and computer program
Figure and/or block diagram are describing.It should be understood that can be by computer program instructions flowchart and/or each stream in block diagram
Journey and/or the combination of square frame and flow chart and/or the flow process in block diagram and/or square frame.These computer programs can be provided
Instruct the processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that produced for reality by the instruction of computer or the computing device of other programmable data processing devices
The device of the function of specifying in present one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory is produced to be included referring to
Make the manufacture of device, the command device realize in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or
The function of specifying in multiple square frames.
These computer program instructions can be also loaded in computer or other programmable data processing devices so that in meter
Series of operation steps is executed on calculation machine or other programmable devices to produce computer implemented process, so as in computer or
The instruction executed on other programmable devices is provided for realization in one flow process of flow chart or multiple flow processs and/or block diagram one
The step of function of specifying in individual square frame or multiple square frames.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent
Select embodiment and fall into the had altered of the scope of the invention and change.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of determine downstream signal control point position method, it is characterised in that include：
Determine the position of congestion points；
The traffic trip amount in all paths in the downstream in acquisition setting time section in the congestion points set point；
The traffic trip amount in all paths is analyzed, is determined and related to the congestion points is dredged path；
According to described related to the congestion points dredge the signal control point position that path determines the downstream of the congestion points, described
Signal control point position is the position that the downstream road junction for dredging path related to the congestion points is located.
2. the method for claim 1, it is characterised in that the traffic trip amount to all paths is carried out point
Analysis, determine related to the congestion points dredge path, including：
With the congestion points as analysis position；
The direct-connected path downstream of the analysis position is determined from all paths in the downstream of the set point；
For the direct-connected path downstream per bar, the traffic trip amount of the direct-connected path downstream is obtained, the direct-connected downstream road is determined
The traffic trip amount in footpath is dredged with whether the traffic trip amount sum of all direct-connected path downstream of the analysis position meets setting
Lead threshold value and the direct-connected path downstream is unobstructed；If meeting, threshold value is dredged in setting and the direct-connected path downstream is unobstructed, by institute
State direct-connected path downstream to be defined as related to the congestion points dredging path；And the downstream road junction with the direct-connected path downstream
For analysis position, return the direct-connected path downstream that the analysis position is determined from all paths in the downstream of the set point
The step of, until the path downstream of the set point is analyzed and is terminated.
3. method as claimed in claim 2, it is characterised in that determine the traffic trip amount of the direct-connected path downstream with described
Whether the traffic trip amount sum of all direct-connected path downstream of analysis position meets the ratio of setting relation, including：
Determine that the traffic trip amount of the direct-connected path downstream and the traffic of all direct-connected path downstream of the analysis position go out
The ratio of row amount sum；
If the ratio dredges threshold value more than described setting, meet described setting and dredge threshold value, be otherwise unsatisfactory for the setting
Dredge threshold value.
4. method as claimed in claim 3, it is characterised in that the ratio meets following formula (1)：
S=ODi/∑ODi……………………………………………(1)
Wherein, S is ratio, ODiFor the traffic trip amount of direct-connected path downstream, ∑ ODiAll path downstreams for analysis position
Traffic trip amount sum, i are positive integer.
5. the method for claim 1, it is characterised in that dredge road related to the congestion points described in the basis
After footpath determines the signal control point position in the downstream of the congestion points, also include：
Signal control point position with the downstream as starting point, to r crossing of upper stream queries of the signal control point position in the downstream,
The induced screen control point position in the downstream of the congestion points is determined, wherein r is integer.
6. a kind of determine downstream signal control point position device, it is characterised in that include：
Determining module, for determining the position of congestion points；
Acquisition module, goes out for obtaining the traffic in all paths in the downstream in setting time section in the congestion points set point
Row amount；
Analysis module, for being analyzed to the traffic trip amount in all paths, determines related to the congestion points
Dredge path；
Processing module, for related to the congestion points dredging the signal that path determines the downstream of the congestion points according to described
Control point position, signal control point position are the position that the downstream road junction for dredging path related to the congestion points is located
Put.
7. device as claimed in claim 6, it is characterised in that the analysis module specifically for：
With the congestion points as analysis position；
The direct-connected path downstream of the analysis position is determined from all paths in the downstream of the set point；
For the direct-connected path downstream per bar, the traffic trip amount of the direct-connected path downstream is obtained, the direct-connected downstream road is determined
The traffic trip amount in footpath is dredged with whether the traffic trip amount sum of all direct-connected path downstream of the analysis position meets setting
Lead threshold value and the direct-connected path downstream is unobstructed；If meeting, threshold value is dredged in setting and the direct-connected path downstream is unobstructed, by institute
State direct-connected path downstream to be defined as related to the congestion points dredging path；And the downstream road junction with the direct-connected path downstream
For analysis position, return the direct-connected path downstream that the analysis position is determined from all paths in the downstream of the set point
The step of, until the path downstream of the set point is analyzed and is terminated.
8. device as claimed in claim 7, it is characterised in that the analysis module specifically for：
Determine that the traffic trip amount of the direct-connected path downstream and the traffic of all direct-connected path downstream of the analysis position go out
The ratio of row amount sum；
If the ratio dredges threshold value more than described setting, meet described setting and dredge threshold value, be otherwise unsatisfactory for the setting
Dredge threshold value.
9. device as claimed in claim 8, it is characterised in that the analysis module specifically for：
The ratio meets following formula (1)：
S=ODi/∑ODi……………………………………………(1)
Wherein, S is ratio, ODiFor the traffic trip amount of direct-connected path downstream, ∑ ODiAll path downstreams for analysis position
Traffic trip amount sum, i are positive integer.
10. device as claimed in claim 6, it is characterised in that the processing module is additionally operable to：
Signal control point position with the downstream as starting point, to r crossing of upper stream queries of the signal control point position in the downstream,
The induced screen control point position in the downstream of the congestion points is determined, wherein r is integer.
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