CN106408945B - A kind of traffic congestion evaluation method and system - Google Patents
A kind of traffic congestion evaluation method and system Download PDFInfo
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- CN106408945B CN106408945B CN201611075595.2A CN201611075595A CN106408945B CN 106408945 B CN106408945 B CN 106408945B CN 201611075595 A CN201611075595 A CN 201611075595A CN 106408945 B CN106408945 B CN 106408945B
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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
- G08G1/0133—Traffic data processing for classifying traffic situation
Abstract
The embodiment of the present invention provides a kind of traffic congestion evaluation method and system.The described method includes: determining the coverage in region to be evaluated according to the first preset rules；Obtain the length of multiple target road sections in the coverage；Wherein, the section in the coverage is that preparatory divide obtains；Historical traffic status data of each target road section in preset period of time is obtained, and calculates the congestion duration of each target road section in the preset period of time according to the second preset rules according to the historical traffic status data；Congestion coefficient of the region to be evaluated according to the length of each target road section and the congestion duration calculation in the preset period of time；Ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient.The system is for executing the above method.Method and system provided by the invention carry out ranking by treating the congestion level of evaluation region, improve the accuracy of traffic congestion degree evaluation.
Description
Technical field
The present embodiments relate to technical field of transportation more particularly to a kind of traffic congestion evaluation methods and system.
Background technique
With the development and the improvement of people's living standards of society, the quantity rapid growth of city private car, city is handed over
Contradiction between logical demand and transportation supplies is increasingly sharp, and road traffic congestion phenomenon is increasingly severe.
Urban traffic blocking largely show as vehicle traffic lights crossing, entrance, transport hub, charge station,
The traffic such as emphasis section will put the delay that region exceeds normal time.Alleviate city to find out in the root that occurs from traffic congestion
The effective ways of city's traffic congestion, other than the analysis to urban traffic blocking feature, it is also necessary to which congestion evaluation appropriate refers to
Mark.
Under the conditions of the prior art, by the corresponding phase green light of periodic quantity and each lane for obtaining intersection signal machine
It duration, detects that vehicle that each lane passes through in phase green time is practical to utilize phase green time, calculates and intersect
The jam level of oral sex logical saturation degree evaluation intersection, the green time of this method dependence signal lamp, but each signal lamp road
Mouthful long green light time have biggish difference, by this method to the carry out ranking of congestion in road state and evaluation there are it is larger partially
Difference；Alleviate curve alternatively, constructing congestion sense respectively according to velocity variations in stroke and increasing curve and congestion sense, and by driving process
It is divided into several congestion status construction congestion status transfer figure, is obtained by stateful congestion sense time cumulation amount summation whole
The congestion sense evaluation of estimate of a driving process, but the congestion sense evaluation of estimate in this method relies on congestion status transfer figure, by garage
It is too big to sail velocity perturbation influence, therefore, certain influence will receive by the progress congestion in road situation evaluation of this method；Also
Have, the free stream velocity in each section in road network is calculated according to the speed data that road network vehicle equipment provides, calculates every
The hourage index in section carries out analyzing examples to the hourage index in whole sections and obtains classification number, to whole sections
Hourage exponent data carry out clustering, the mean value of its sample gradient-norm is sought every class, by directly proportional to gradient-norm
Rule distributes all kinds of corresponding congestion index ranges, defines subordinating degree function and reflects hourage exponential number in each class respectively
It is mapped to such corresponding congestion index section, the key parameter road trip time index of this method is vehicle with present speed row
The ratio that the time that equally distance needs is travelled with free stream velocity is sailed, the free stream velocity of advanced road is much larger than inferior grade
Road, same congestion level, the more high then road trip time index of free stream velocity is higher, and corresponding congestion index is bigger,
Therefore it is not suitable for use in this method and congestion level is evaluated.
Therefore, how to propose that the problem of a kind of traffic will put the congestion evaluation method in region is that current industry is urgently to be resolved
Need project.
Summary of the invention
For the defects in the prior art, the embodiment of the present invention provides a kind of traffic congestion evaluation method and system.
On the one hand, the embodiment of the present invention provides a kind of traffic congestion evaluation method, comprising:
The coverage in region to be evaluated is determined according to the first preset rules；
Obtain the length of multiple target road sections in the coverage；Wherein, the section in the coverage is pre-
First divide acquisition；
Historical traffic status data of each target road section in preset period of time is obtained, and according to the historical traffic
Status data calculates the congestion duration of each target road section in the preset period of time according to the second preset rules；
The region to be evaluated according to the length of each target road section and the congestion duration calculation is described default
Congestion coefficient in period；
Ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient.
On the other hand, the embodiment of the present invention provides a kind of traffic congestion evaluation system, comprising:
Processing unit, for determining the coverage in region to be evaluated according to the first preset rules；
First acquisition unit, for obtaining the length of multiple target road sections in the coverage；Wherein, the influence
Section in range is that preparatory divide obtains；
Second acquisition unit, for obtaining historical traffic status data of each target road section in preset period of time,
And each target road section in the preset period of time is calculated according to the second preset rules according to the historical traffic status data
Congestion duration；
Computing unit, for the area to be evaluated according to the length of each target road section and the congestion duration calculation
Congestion coefficient of the domain in the preset period of time；
Ranking unit, for according to the congestion coefficient to congestion level of the region to be evaluated in preset period of time into
Row ranking.
The method and system of traffic congestion evaluation provided in an embodiment of the present invention, pass through the influence model according to region to be evaluated
Region to be evaluated described in the length of interior each target road section and the congestion duration calculation in preset period of time is enclosed when described default
Congestion coefficient in section, and congestion level of the region to be evaluated in preset period of time is arranged according to the congestion coefficient
Name treats evaluation region and carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the flow diagram of traffic congestion evaluation method provided in an embodiment of the present invention；
Fig. 2 is the area schematic to be evaluated provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram for the traffic congestion evaluation system that one embodiment of the invention provides；
Fig. 4 be another embodiment of the present invention provides traffic congestion evaluation system structural schematic diagram；
Fig. 5 is the structural schematic diagram of electronic equipment provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Fig. 1 is the flow diagram of the method for traffic congestion provided in an embodiment of the present invention evaluation, as shown in Figure 1, this reality
It applies example and a kind of method of traffic congestion evaluation is provided, comprising:
S1, the coverage that region to be evaluated is determined according to the first preset rules；
Specifically, system obtains the influence distance of the region to be evaluated in all directions, by the region to be evaluated
Coverage of the influence distance as the region to be evaluated in all directions.Wherein, the region to be evaluated can be
The key traffic location such as traffic lights crossing, entrance, transport hub, charge station, emphasis section, does not do specific limit herein
It is fixed.
S2, the length for obtaining multiple target road sections in the coverage；Wherein, the section in the coverage is
Acquisition is divided in advance；
Specifically, in advance by the region to be evaluated in all directions between next adjacent region to be evaluated
Distance is divided into multiple sections, uses Lk,i,jIndicate that k-th of i-th of direction in region to be evaluated is influenced apart from interior jth in entire city
The length of target road section, Mk,iIndicate that k-th of i-th of direction in area to be evaluated influences the target road section number in distance, βk,iIt indicates
The total section number in k-th of i-th of direction in area to be evaluated.Then Mk,iCalculation formula it is as follows:
max:Mk,i
M is chosen along the direction since the region to be evaluated on i-th of direction in the region to be evaluatedk,iIt is a
Section obtains the length of each target road section as the target road section.It is understood that the region to be evaluated
There are residential block entrance, school doorway, access adit and ring roads between next adjacent region to be evaluated in all directions
Mouthful etc. the significant position that traffic congestion degree may be had an impact, will be described in the distance between these significant positions be used as
Multiple sections between next adjacent region to be evaluated in all directions in region to be evaluated, can also be according to other rule
Section division is then carried out, is not specifically limited herein.
S3, historical traffic status data of each target road section in preset period of time is obtained, and according to the history
Traffic state data calculates the congestion duration of each target road section in the preset period of time according to the second preset rules；
Specifically, system obtains historical traffic status data of each described target road section in preset period of time, according to
The historical traffic status data calculates the congestion of each target road section in the preset period of time according to the second preset rules
Duration.It should be noted that the historical traffic status data is classified according to characteristic day and period, characteristic day includes
Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday, festivals or holidays, period dimension include: morning peak (7:00-9:00), evening
Peak (17:00~19:00), the flat cutting edge of a knife or a sword period (9:00~17:00 and 19:00~22:00), night (0:00~7:00 and 22:
00~24:00), whole day (0:00~24:00), the preset period of time similarly has the category of the characteristic day and the period
Property；The historical traffic status data of the target road section includes: without road conditions, congestion, slow and unobstructed, the historical traffic state
Data are the traffic state datas for obtaining the corresponding preset period of time within the scope of default historical time, be can be in one month often
Traffic state data in one day corresponding preset period of time can not also specifically be limited herein with other historical time ranges
It is fixed.
S4, the region to be evaluated according to the length of each target road section and the congestion duration calculation are described pre-
If the congestion coefficient in the period；
Specifically, system is by the length of each target road section and congestion of the target road section in preset period of time
Duration multiplication obtains congestion coefficient of each target road section in preset period of time, by all target road sections described pre-
If the congestion coefficient summation in the period obtains congestion coefficient of the region to be evaluated in the preset period of time.It is understood that
It is that each target road section is the target road section of the region to be evaluated in all directions.
S5, ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient.
Specifically, system obtains the congestion system of all regions to be evaluated in entire city in the preset period of time
Number, calculates each described region to be evaluated corresponding congestion score, root in the preset period of time according to the congestion coefficient
Ranking is carried out to each region to be evaluated according to the congestion score in region to be evaluated described in each.
For example, Fig. 2 is the area schematic to be evaluated provided in an embodiment of the present invention, as shown in Fig. 2, described to be evaluated
Region is k-th of crossroad A in certain city, in a first direction kth -1 four crossway adjacent with the region to be evaluated
Mouth is B, is that the distance between B is divided into multiple sections, the crossroad A by the crossroad A and the crossroad
Influence distance on four direction is as shown, by described in influence distance conduct of the crossroad A on four direction
The coverage of crossroad A obtains the section in the influence distance in all directions as target road section, with first
For direction, it is that the distance between B is divided into totally 6 sections by the crossroad A and the crossroad, obtains the shadow
3 sections for ringing the close crossroad A in range are target road section, then obtain the length of 3 target road sections respectively, and divide
Not Huo Qu 3 target road sections on Monday morning peak (7:00-9:00) the historical traffic status data in 30 days in the month before, root
The congestion duration for calculating target road section according to the second preset rules according to the historical traffic status data, by 3 target road sections
Length is multiplied with the congestion duration obtains the congestion coefficient of 3 target road sections, calculates other three sides after the same method
The congestion coefficient of upward each target road section, details are not described herein again, finally by the crossroad A in all directions complete
It is on Monday early that the congestion coefficient summation of the on Monday morning peak (7:00-9:00) of target road section described in portion obtains the crossroad A
The congestion coefficient on peak (7:00-9:00).System obtains all regions to be evaluated in entire city on Monday morning peak (7:00-
Congestion coefficient 9:00), according to the congestion coefficient calculate all regions to be evaluated in the city on Monday morning peak (7:00-9:
00) congestion score carries out ranking to each region to be evaluated according to the congestion score in region to be evaluated described in each.
Traffic congestion evaluation method provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
On the basis of the above embodiments, further, the shadow that region to be evaluated is determined according to the first preset rules
Ring range, comprising:
At a distance from if judgement knows the region to be evaluated on preset direction between adjacent another region to be evaluated
Greater than preset threshold, then using the preset threshold as the influence distance on the preset direction in the region to be evaluated；
If judgement is not more than institute at a distance from knowing the region to be evaluated on preset direction between adjacent another region to be evaluated
Preset threshold is stated, then by the distance between the region to be evaluated and adjacent another region to be evaluated as described to be evaluated
The influence distance on the preset direction in valence region；
By coverage of the influence distance as the region to be evaluated of the region to be evaluated in all directions.
Specifically, if system judgement know the region to be evaluated in one direction with adjacent another region to be evaluated
The distance between be greater than preset threshold, then using the preset threshold as the region to be evaluated on the preset direction
Influence distance；At a distance from if judgement knows the region to be evaluated on preset direction between adjacent another region to be evaluated
No more than the preset threshold, then by the conduct of the distance between the region to be evaluated and adjacent another region to be evaluated
The influence distance on the preset direction in the region to be evaluated；The area to be evaluated can be determined by the same method
Influence distance in other all directions of domain, details are not described herein again；By the influence of the region to be evaluated in all directions away from
From the coverage as the region to be evaluated.
For example, the preset threshold is θ, if between the crossroad A and the crossroad B with continued reference to Fig. 2
Distance is greater than θ, then the influence distance of the crossroad A in the first direction is θ；If the crossroad A and described ten
The distance between word crossing B is not more than θ, then the influence distance of the crossroad A in the first direction is the four crossway
Mouth the distance between A and the crossroad B.Other three directions the crossroad A can be determined by the same method
On influence distance, details are not described herein again；By the influence distance of the crossroad A in all directions as described to be evaluated
The coverage in region.It is understood that the crossroad A in different directions described preset pre- threshold value specifically can be with
It is adjusted, is not specifically limited herein according to the actual situation
Traffic congestion evaluation method provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
On the basis of the above embodiments, further, described to obtain each target road section in preset period of time
Historical traffic status data, and calculated in the preset period of time according to the historical traffic status data according to the second preset rules
Each target road section congestion duration, comprising:
The whole day time is divided into multiple equal periods, each mesh in each period in acquisition preset period of time
Mark the historical traffic status data in section；
According to each target described in the historical traffic state data acquisition of the target road section each in each period
Congestion parameter of the section within each period；
Each target road section is each in the congestion parameter summation acquisition preset period of time in each period
The congestion duration of the target road section.
Specifically, historical traffic status data is divided into eight characteristic days: Monday (Mon), Tuesday (Tue), Wednesday
(Wed), Thursday (Thu), Friday (Fri), Saturday (Sat), Sunday (Sun), festivals or holidays (Hol).Table 1 is the division of whole day time
Period use Ψ as shown in table 1pIndicate different time sections, Ψp={ Ψ0,Ψ1,Ψ2,Ψ3,Ψ4, wherein Ψ0For round-the-clock
Section, Ψ1For morning peak period, Ψ2For evening peak period, Ψ3For flat peak period, Ψ4For night-time hours；Use Ψp,SAnd Ψp,EPoint
It Biao Shi not period ΨpStart cycle and last cycle, the period indicate traffic behavior renewal time, when the period be 5 minutes
When, it indicates to update for traffic behavior every 5 minutes primary.For example, 0:00~0:05 indicates a cycle, 0:05~0:10 indicates the
Two periods, and so on, 23:55~24:00 indicates the 288th period, is divided into 288 periods within whole day 24 hours.It adopts
Collecting described k-th i-th of region, j-th of direction to be evaluated target road section, corresponding preset period of time includes in historical time at one end
Period corresponding traffic behavior, obtain the most traffic behavior of frequency of occurrence as described k-th i-th of side in region to be evaluated
To traffic behavior of j-th of target road section within t-th of period:
Wherein, Sk,i,j,tIndicate k-th of i-th of region, j-th of direction target road section to be evaluated in the preset period of time
The traffic behavior in t-th of period, the traffic behavior includes no road conditions, congestion, slow, unimpeded, is denoted as 0,1,2,3 respectively.Root
Each target road section described in historical traffic state data acquisition according to each target road section in each period is each
Congestion parameter in period:
Wherein, λk,i,j,tFor k-th of i-th of direction in region to be evaluated j-th of target road section in the preset period of time
T-th of period congestion parameter, for indicate k-th of i-th of region, j-th of direction target road section to be evaluated at t-th week
Whether the phase is congestion.Each target road section is obtained in the preset period of time in the congestion parameter summation in each period
The congestion duration of each target road section:
Wherein, NpFor the preset period of time ΨpInterior periodicity,For k-th of i-th of region, j-th of direction to be evaluated
Target road section is in the preset period of time ΨpInterior congestion duration.
Table 1
For example, obtaining each target road section on the crossroad A four direction within half a year with continued reference to Fig. 2
The historical traffic status data of Monday morning peak (7:00-9:00), obtain each described target road section on Monday morning peak (7:
00-9:00) the most traffic behavior of frequency of occurrence is as the on Monday morning peak (7:00-9:00) of target road section described in each
Traffic behavior, to obtain j-th of the direction i-th of crossroad A target road section, on Monday morning peak (7:00-9:00) is interior
T-th of period congestion parameter lambdak,i,j,t, Monday morning peak (7:00-9:00) was the 85th~108 period, totally 23 periods,
The then congestion duration of j-th of the direction i-th of crossroad A target road section on Monday morning peak (7:00-9:00) are as follows:
Traffic congestion evaluation method provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
On the basis of the above embodiments, further, it the length according to each target road section and described gathers around
Congestion coefficient of the region to be evaluated described in stifled duration calculation in the preset period of time, comprising:
According to the length of each target road section and each target road section of congestion duration calculation when described default
Congestion coefficient in section；
Congestion coefficient summation of each target road section in the preset period of time is existed as the region to be evaluated
Congestion coefficient in the preset period of time.
Specifically, by appearance when the length of each target road section in the region to be evaluated and the corresponding congestion
Multiply the congestion coefficient for calculating each target road section in the preset period of time:Wherein, ρk,i,jTo indicate
The congestion coefficient of k-th of i-th of direction j-th strip target road section in region to be evaluated,For k-th of i-th of side in region to be evaluated
To j-th of target road section in the preset period of time ΨpInterior congestion duration, Lk,i,jFor k-th of i-th of direction in region to be evaluated
The length of j target road section.By congestion of the target road section in the preset period of time of the area to be evaluated in all directions
The congestion coefficient that coefficient is summed as the region to be evaluated in the preset period of time:
Wherein, ρkFor the congestion coefficient in k-th of region to be evaluated, N is the direction number in k-th of region to be evaluated, Mk,iFor
The target road section number in k-th of i-th of direction in region to be evaluated.
For example, with continued reference to Fig. 2, by j-th of the direction i-th of crossroad A target road section on Monday morning peak (7:
Congestion duration 00-9:00)With the length L of j-th of target road sectionk,i,jIt is multiplied and calculates j-th of target road section
Congestion coefficient ρk,j,j, then on Monday congestion coefficient of the morning peak (7:00-9:00) in the period is the crossroad A
Traffic congestion evaluation method provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
On the basis of the above embodiments, further, described to be existed according to the congestion coefficient to the region to be evaluated
Congestion level in preset period of time carries out ranking, comprising:
The congestion score in the region to be evaluated is calculated according to third preset rules according to the congestion coefficient；
According to the corresponding congestion score in the region to be evaluated to region to be evaluated the gathering around in preset period of time
Stifled degree carries out ranking.
Specifically, system obtains all regions to be evaluated in entire city corresponding congestion system in the preset period of time
Number, highest congestion coefficient is 100 points corresponding, and minimum congestion coefficient is as 0 point, unit of account congestion score
Wherein, δ is unit congestion score, ρmaxFor highest congestion coefficient in regions to be evaluated all in the preset period of time, ρminFor
Congestion coefficient minimum in all regions to be evaluated in the preset period of time.Pass through formula:Calculate k-th it is to be evaluated
The congestion score in region, wherein ρkFor the congestion coefficient in k-th of region to be evaluated, δ is unit congestion score.According to each
The score in the region to be evaluated carries out ranking to each region to be evaluated from high to low, ranking more it is forward then it is corresponding to
The congestion level of evaluation region is higher, and more then the congestion level in corresponding region to be evaluated is lower rearward for ranking, can also basis
The region to be evaluated be in different ranking sections by the region to be evaluated with different color or shape representation in map
On.
Traffic congestion evaluation method provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
Fig. 3 is the structural schematic diagram of traffic congestion evaluation system provided in an embodiment of the present invention, as shown in figure 3, of the invention
Embodiment provides a kind of traffic congestion evaluation system, comprising: processing unit 301, first acquisition unit 302, second acquisition unit
303, computing unit 304 and ranking unit 305, in which:
Processing unit 301 is used to determine the coverage in region to be evaluated according to the first preset rules；First acquisition unit
302 for obtaining the length of multiple target road sections in the coverage；Wherein, the section in the coverage is preparatory
Divide acquisition；Second acquisition unit 303 is for obtaining historical traffic state of each target road section in preset period of time
Data, and each target in the preset period of time is calculated according to the second preset rules according to the historical traffic status data
The congestion duration in section；Computing unit 304 is used for length and the congestion duration calculation institute according to each target road section
State congestion coefficient of the region to be evaluated in the preset period of time；Ranking unit 305 is used for according to the congestion coefficient to described
Congestion level of the region to be evaluated in preset period of time carries out ranking.
Specifically, processing unit 301 obtains the influence distance of the region to be evaluated in all directions, will be described to be evaluated
Coverage of the influence distance as the region to be evaluated of valence region in all directions.First acquisition unit 302 is preparatory
The region to be evaluated is divided into multiple sections with next adjacent the distance between region to be evaluated in all directions,
Use Lk,i,jIndicate the length of k-th of i-th of direction j-th strip target road section in region to be evaluated in entire city, Mk,iIt indicates k-th
The target road section number in i-th of direction in area to be evaluated, βk,iIndicate the total section number in k-th of i-th of direction in area to be evaluated.Then Mk,i's
Calculation formula is as follows:
max:Mk,i
M is chosen along the direction since the region to be evaluated on i-th of direction in the region to be evaluatedk,iIt is a
Section obtains the length of each target road section as the target road section.Second acquisition unit 303 obtains described in each
Historical traffic status data of the target road section in preset period of time, according to the historical traffic status data according to the second default rule
Then calculate the congestion duration of each target road section in the preset period of time.Computing unit 304 will each described target road
The length of section is multiplied with congestion duration of the target road section in preset period of time obtains each target road section when default
Congestion coefficient in section obtains congestion coefficient summation of all target road sections in the preset period of time described to be evaluated
Congestion coefficient of the region in the preset period of time.305 system of ranking unit obtains all regions to be evaluated in entire city and exists
The congestion coefficient in the preset period of time calculates each described region to be evaluated described pre- according to the congestion coefficient
If corresponding congestion score in the period, according to the congestion score in region to be evaluated described in each to each region to be evaluated
Carry out ranking.
Traffic congestion evaluation system provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
On the basis of the above embodiments, further, processing unit 301 is specifically used for:
At a distance from if judgement knows the region to be evaluated on preset direction between adjacent another region to be evaluated
Greater than preset threshold, then using the preset threshold as the influence distance on the preset direction in the region to be evaluated；
If judgement is not more than institute at a distance from knowing the region to be evaluated on preset direction between adjacent another region to be evaluated
Preset threshold is stated, then by the distance between the region to be evaluated and adjacent another region to be evaluated as described to be evaluated
The influence distance on the preset direction in valence region；
By coverage of the influence distance as the region to be evaluated of the region to be evaluated in all directions.
Specifically, if processing unit 301 judge to know the region to be evaluated in one direction with it is adjacent it is another to
The distance between evaluation region is greater than preset threshold, then using the preset threshold as the region to be evaluated described default
Influence distance on direction；If judgement know the region to be evaluated on preset direction with adjacent another region to be evaluated it
Between distance be not more than the preset threshold, then will be between the region to be evaluated and adjacent another region to be evaluated
Influence distance on the preset direction of the distance as the region to be evaluated；Described in can determining by the same method
Influence distance in other all directions of region to be evaluated, details are not described herein again；In all directions by the region to be evaluated
Coverage of the influence distance as the region to be evaluated.
Traffic congestion evaluation system provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
Fig. 4 be another embodiment of the present invention provides traffic congestion evaluation system structural schematic diagram, as shown in figure 4, described
System includes processing unit 301, first acquisition unit 302, second acquisition unit 303, computing unit 304 and ranking unit 305,
The second acquisition unit 303 includes dividing subelement 305, obtaining subelement 306 and summation subelement 307, in which:
It divides subelement 305 to be used to the whole day time being divided into multiple equal periods, obtain each in each period
The historical traffic status data of a target road section；Subelement 306 is obtained to be used for according to each described in each period
Congestion parameter of each target road section described in the historical traffic state data acquisition of target road section within each period；Summation is single
Member 307 is each in the preset period of time for obtaining each target road section in the congestion parameter summation in each period
The congestion duration of the target road section.
Specifically, it divides subelement 305 and historical traffic status data is divided into eight characteristic days: Monday (Mon), Tuesday
(Tue), Wednesday (Wed), Thursday (Thu), Friday (Fri), Saturday (Sat), Sunday (Sun), festivals or holidays (Hol).Table 1 is whole day
The period of the division of time uses Ψ as shown in table 1pIndicate different time sections, Ψp={ Ψ0,Ψ1,Ψ2,Ψ3,Ψ4, wherein
Ψ0For whole day period, Ψ1For morning peak period, Ψ2For evening peak period, Ψ3For flat peak period, Ψ4For night-time hours；With
Ψp,SAnd Ψp,ERespectively indicate period ΨpStart cycle and last cycle, the period indicate traffic behavior renewal time, when
When period is 5 minutes, indicate to update for traffic behavior every 5 minutes primary.For example, 0:00~0:05 indicates a cycle, 0:05
~0:10 indicates second period, and so on, 23:55~24:00 indicates the 288th period, is divided within whole day 24 hours
288 periods.Acquisition subelement 306 acquires described k-th i-th of region, j-th of direction to be evaluated target road section and goes through at one end
The period corresponding traffic behavior that corresponding preset period of time includes in the history time obtains the most traffic behavior conduct of frequency of occurrence
Traffic behavior of k-th of i-th of region, j-th of the direction target road section to be evaluated within t-th of period:
Wherein, Sk,i,j,tIndicate k-th of i-th of region, j-th of direction target road section to be evaluated in the preset period of time
The traffic behavior in t-th of period, the traffic behavior includes no road conditions, congestion, slow, unimpeded, is denoted as 0,1,2,3 respectively.It obtains
Take each mesh according to the historical traffic state data acquisition of the target road section each in each period of subelement 306
Mark congestion parameter of the section within each period:
Wherein, λk,i,j,tFor k-th of i-th of direction in region to be evaluated j-th of target road section in the preset period of time
T-th of period congestion parameter, for indicate k-th of i-th of region, j-th of direction target road section to be evaluated at t-th week
Whether the phase is congestion.Each target road section is obtained in the preset period of time in the congestion parameter summation in each period
The congestion duration of each target road section:
Wherein, NpFor the preset period of time ΨpInterior periodicity,For k-th of i-th of region, j-th of direction to be evaluated
Target road section is in the preset period of time ΨpInterior congestion duration.
Traffic congestion evaluation system provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
On the basis of the above embodiments, further, computing unit 304 is specifically used for:
According to the length of each target road section and each target road section of congestion duration calculation when described default
Congestion coefficient in section；
Congestion coefficient summation of each target road section in the preset period of time is existed as the region to be evaluated
Congestion coefficient in the preset period of time.
Specifically, computing unit 304 is by the length of each target road section in the region to be evaluated and corresponding institute
It states the multiplication of congestion duration and calculates congestion coefficient of each target road section in the preset period of time:Its
In, ρk,j,jFor indicate k-th of i-th of direction j-th strip target road section in region to be evaluated congestion coefficient,It is to be evaluated for k-th
I-th of valence region, j-th of direction target road section is in the preset period of time ΨpInterior congestion duration, Lk,i,jFor k-th of area to be evaluated
The length of i-th of domain, j-th of direction target road section.By the target road section of the area to be evaluated in all directions described default
The congestion coefficient that congestion coefficient in period is summed as the region to be evaluated in the preset period of time:
Wherein, ρkFor the congestion coefficient in k-th of region to be evaluated, N is the direction number in k-th of region to be evaluated, Mk,iFor
The target road section number in k-th of i-th of direction in region to be evaluated.
Traffic congestion evaluation system provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
On the basis of the above embodiments, further, ranking unit 305 is specifically used for:
The congestion score in the region to be evaluated is calculated according to third preset rules according to the congestion coefficient；
According to the corresponding congestion score in the region to be evaluated to region to be evaluated the gathering around in preset period of time
Stifled degree carries out ranking.
Specifically, it is corresponding in the preset period of time to obtain all regions to be evaluated in entire city for ranking unit 305
Congestion coefficient, highest congestion coefficient is 100 points corresponding, and minimum congestion coefficient is as 0 point, unit of account congestion scoreWherein, δ is unit congestion score, ρmaxIt is gathered around to be highest in regions to be evaluated all in the preset period of time
Stifled coefficient, ρminFor congestion coefficient minimum in regions to be evaluated all in the preset period of time.Pass through formula:It calculates
The congestion score in k-th of region to be evaluated, wherein ρkFor the congestion coefficient in k-th of region to be evaluated, δ is unit congestion score.
Ranking is carried out to each region to be evaluated from high to low according to the score in region to be evaluated described in each, ranking is more forward
Then the congestion level in corresponding region to be evaluated is higher, and more then the congestion level in corresponding region to be evaluated is lower rearward for ranking,
Different ranking sections can also be according to the region to be evaluated by the region to be evaluated with different color or shape
It indicates on map.
Traffic congestion evaluation system provided in an embodiment of the present invention, by each in the coverage according to region to be evaluated
Region gathering around in the preset period of time to be evaluated described in the length of target road section and congestion duration calculation in preset period of time
Stifled coefficient, and ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient, it treats
Evaluation region carries out congestion level evaluation, improves the accuracy of traffic congestion degree evaluation.
The embodiment of system provided by the invention specifically can be used for executing the process flow of above-mentioned each method embodiment,
Details are not described herein for function, is referred to the detailed description of above method embodiment.
Fig. 5 is the structural schematic diagram of electronic equipment provided in an embodiment of the present invention, as shown in figure 5, the electronic equipment can be with
It include: processor (processor) 501, memory (memory) 502 and bus 503, wherein processor 501, memory 502
Mutual communication is completed by bus 503.Processor 501 can call the logical order in memory 502, as follows to execute
Method: the coverage in region to be evaluated is determined according to the first preset rules；Obtain multiple target roads in the coverage
The length of section；Wherein, the section in the coverage is that preparatory divide obtains；Each target road section is obtained default
Historical traffic status data in period, and it is described pre- according to the calculating of the second preset rules according to the historical traffic status data
If the congestion duration of each target road section in the period；According to the length of each target road section and the congestion duration meter
Calculate congestion coefficient of the region to be evaluated in the preset period of time；Existed according to the congestion coefficient to the region to be evaluated
Congestion level in preset period of time carries out ranking.
The embodiment of the present invention discloses a kind of computer program product, and the computer program product is non-transient including being stored in
Computer program on computer readable storage medium, the computer program include program instruction, when described program instructs quilt
When computer executes, computer is able to carry out method provided by above-mentioned each method embodiment, for example, default according to first
Rule determines the coverage in region to be evaluated；Obtain the length of multiple target road sections in the coverage；Wherein, described
Section in coverage is that preparatory divide obtains；Obtain historical traffic shape of each target road section in preset period of time
State data, and each mesh in the preset period of time is calculated according to the second preset rules according to the historical traffic status data
Mark the congestion duration in section；The region to be evaluated according to the length of each target road section and the congestion duration calculation exists
Congestion coefficient in the preset period of time；Congestion journey according to the congestion coefficient to the region to be evaluated in preset period of time
Degree carries out ranking.
The embodiment of the present invention provides a kind of non-transient computer readable storage medium, the non-transient computer readable storage
Medium storing computer instruction, the computer instruction make the computer execute side provided by above-mentioned each method embodiment
Method, for example, the coverage in region to be evaluated is determined according to the first preset rules；It obtains multiple in the coverage
The length of target road section；Wherein, the section in the coverage is that preparatory divide obtains；Obtain each target road section
Historical traffic status data in preset period of time, and calculated according to the historical traffic status data according to the second preset rules
The congestion duration of each target road section in the preset period of time；According to the length and the congestion of each target road section
Congestion coefficient of the region to be evaluated described in duration calculation in the preset period of time；According to the congestion coefficient to described to be evaluated
Congestion level of the region in preset period of time carries out ranking.
In addition, the logical order in above-mentioned memory 503 can be realized by way of SFU software functional unit and conduct
Independent product when selling or using, can store in a computer readable storage medium.Based on this understanding, originally
Substantially the part of the part that contributes to existing technology or the technical solution can be in other words for the technical solution of invention
The form of software product embodies, which is stored in a storage medium, including some instructions to
So that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation of the present invention
The all or part of the steps of example the method.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM,
Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. it is various
It can store the medium of program code.
System embodiment described above is only schematical, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of traffic congestion evaluation method characterized by comprising
The coverage in region to be evaluated is determined according to the first preset rules；First preset rules refer to the area to be evaluated
Coverage of the influence distance as the region to be evaluated of domain in all directions；
Obtain the length of multiple target road sections in the coverage；Wherein, the section in the coverage is to draw in advance
It separately wins；
Historical traffic status data of each target road section in preset period of time is obtained, and according to the historical traffic state
Data calculate the congestion duration of each target road section in the preset period of time according to the second preset rules；
The region to be evaluated according to the length of each target road section and the congestion duration calculation is in the preset period of time
Interior congestion coefficient；
Ranking is carried out to congestion level of the region to be evaluated in preset period of time according to the congestion coefficient；
The region to be evaluated according to the length of each target road section and the congestion duration calculation is described default
Congestion coefficient in period, comprising:
According to the length of each target road section and each target road section of congestion duration calculation in the preset period of time
Congestion coefficient；
By congestion coefficient summation of each target road section in the preset period of time as the region to be evaluated described
Congestion coefficient in preset period of time.
2. the method according to claim 1, wherein described determine region to be evaluated according to the first preset rules
Coverage, comprising:
If judgement is greater than at a distance from knowing the region to be evaluated on preset direction between adjacent another region to be evaluated
Preset threshold, then using the preset threshold as the influence distance on the preset direction in the region to be evaluated；If sentencing
Break at a distance from knowing the region to be evaluated on preset direction between adjacent another region to be evaluated no more than described pre-
If threshold value, then the distance between the region to be evaluated and adjacent another region to be evaluated are regard as the area to be evaluated
The influence distance on the preset direction in domain；
By coverage of the influence distance as the region to be evaluated of the region to be evaluated in all directions.
3. the method according to claim 1, wherein described obtain each target road section in preset period of time
Historical traffic status data, and the preset period of time is calculated according to the second preset rules according to the historical traffic status data
The congestion duration of interior each target road section, comprising:
The whole day time is divided into multiple equal periods, obtains in the preset period of time each target road in each period
The historical traffic status data of section；
According to each target road section described in the historical traffic state data acquisition of the target road section each in each period
Congestion parameter within each period；
Each target road section is each described in the congestion parameter summation acquisition preset period of time in each period
The congestion duration of target road section.
4. the method according to claim 1, wherein it is described according to the congestion coefficient to the region to be evaluated
Congestion level in preset period of time carries out ranking, comprising:
The congestion score in the region to be evaluated is calculated according to third preset rules according to the congestion coefficient；
Congestion level of the region to be evaluated in preset period of time is arranged according to the corresponding score in the region to be evaluated
Name；
Wherein, the congestion score is obtained by following formula:
In formula,For the congestion score in k-th of region to be evaluated, ρkFor the congestion coefficient in k-th of region to be evaluated, δ gathers around for unit
Stifled score,Wherein, ρmaxFor highest congestion coefficient in regions to be evaluated all in the preset period of time,
ρminFor congestion coefficient minimum in regions to be evaluated all in the preset period of time.
5. a kind of traffic congestion evaluation system characterized by comprising
Processing unit, for determining the coverage in region to be evaluated according to the first preset rules；First preset rules refer to
By coverage of the influence distance as the region to be evaluated of the region to be evaluated in all directions；
First acquisition unit, for obtaining the length of multiple target road sections in the coverage；Wherein, the coverage
Interior section is that preparatory divide obtains；
Second acquisition unit, for obtaining historical traffic status data of each target road section in preset period of time, and root
Gathering around for each target road section in the preset period of time is calculated according to the second preset rules according to the historical traffic status data
Stifled duration；
Computing unit exists for the region to be evaluated according to the length of each target road section and the congestion duration calculation
Congestion coefficient in the preset period of time；
Ranking unit, for being arranged according to the congestion coefficient congestion level of the region to be evaluated in preset period of time
Name；
The computing unit is specifically used for:
According to the length of each target road section and each target road section of congestion duration calculation in the preset period of time
Congestion coefficient；
By congestion coefficient summation of each target road section in the preset period of time as the region to be evaluated described
Congestion coefficient in preset period of time.
6. system according to claim 5, which is characterized in that the processing unit is specifically used for:
If judgement is greater than at a distance from knowing the region to be evaluated on preset direction between adjacent another region to be evaluated
Preset threshold, then using the preset threshold as the influence distance on the preset direction in the region to be evaluated；If sentencing
Break at a distance from knowing the region to be evaluated on preset direction between adjacent another region to be evaluated no more than described pre-
If threshold value, then the distance between the region to be evaluated and adjacent another region to be evaluated are regard as the area to be evaluated
The influence distance on the preset direction in domain；
By coverage of the influence distance as the region to be evaluated of the region to be evaluated in all directions.
7. system according to claim 5, which is characterized in that the second acquisition unit includes:
It divides subelement and obtains each target in each period for the whole day time to be divided into multiple equal periods
The historical traffic status data in section；
Subelement is obtained, for the historical traffic state data acquisition institute according to each target road section in each period
State congestion parameter of each target road section within each period；
Summation subelement, when for congestion parameter summation of each target road section within each period to be obtained described default
The congestion duration of each target road section in section.
8. system according to claim 5, which is characterized in that the ranking unit is specifically used for:
The congestion score in the region to be evaluated is calculated according to third preset rules according to the congestion coefficient；
Congestion journey according to the corresponding congestion score in the region to be evaluated to the region to be evaluated in preset period of time
Degree carries out ranking；
Wherein, the congestion score is obtained by following formula:
In formula,For the congestion score in k-th of region to be evaluated, ρkFor the congestion coefficient in k-th of region to be evaluated, δ gathers around for unit
Stifled score,Wherein, ρmaxFor highest congestion coefficient in regions to be evaluated all in the preset period of time,
ρminFor congestion coefficient minimum in regions to be evaluated all in the preset period of time.
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| CN109360414B (en) * | 2018-09-18 | 2020-10-23 | 北京交通大学 | Identification and screening method for frequently congested road sections |
| CN110473398B (en) * | 2019-07-29 | 2020-09-11 | 安徽科力信息产业有限责任公司 | Urban road congestion analysis method and device |
| CN110491122B (en) * | 2019-07-29 | 2021-03-30 | 安徽科力信息产业有限责任公司 | Method and device for reducing urban congestion ranking |
| CN110718057B (en) * | 2019-09-11 | 2021-06-15 | 北京掌行通信息技术有限公司 | Road network operation state evaluation method and device, electronic equipment and medium |
| CN110929179B (en) * | 2019-11-05 | 2023-06-09 | 阿里巴巴集团控股有限公司 | Travel data processing method and device and electronic equipment |
| CN110992689B (en) * | 2019-11-28 | 2021-07-30 | 北京世纪高通科技有限公司 | Congestion feature determination method and device |
| CN111145536B (en) * | 2019-12-02 | 2021-03-16 | 北京航空航天大学 | Road network brittleness evaluation method based on anomaly detection |
| CN111081019B (en) * | 2019-12-23 | 2021-08-10 | 华南理工大学 | Road network traffic running condition evaluation method based on road segment weight coefficient |
| CN110930713A (en) * | 2020-02-07 | 2020-03-27 | 北京交研智慧科技有限公司 | Historical reproduction rate-based road frequent congestion identification method, device and equipment |
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