CN106816018A - A kind of city changeable-message sign traffic above-ground induction section determines method - Google Patents
A kind of city changeable-message sign traffic above-ground induction section determines method Download PDFInfo
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- CN106816018A CN106816018A CN201710083761.1A CN201710083761A CN106816018A CN 106816018 A CN106816018 A CN 106816018A CN 201710083761 A CN201710083761 A CN 201710083761A CN 106816018 A CN106816018 A CN 106816018A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
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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
Determine method the present invention relates to a kind of city changeable-message sign traffic above-ground induction section.City changeable-message sign traffic above-ground induction section of the invention determines that method avoids the unreasonable of changeable-message sign induction section, causes the phenomenons such as the wasting of resources, public discontent.With reference to urban streets recurrent congestion discriminant criterion, category of roads discriminant criterion and changeable-message sign road inducible form, make to induce section more scientific, reasonable in changeable-message sign.
Description
Technical field
Determine method the present invention relates to a kind of city changeable-message sign traffic above-ground induction section, belong to urban transportation and lure
Guiding systems field.
Background technology
With society and expanding economy, vehicles number rapid growth, big and medium-sized cities traffic jam, traffic order are chaotic
Situation be on the rise.Changeable-message sign provides the traffic state information in front section to road user, driver is existed
Vehicle understands various traffics in time in advancing, and can change its course shunting in time, mitigates the degree of crowding, is relieved traffic congestion with profit, from
And the service efficiency of whole Traffic Systems resource is improved, reduce the consumption of resource and mitigate environmental pollution.
Currently, to induce section to determine in changeable-message sign outside the venue extensive, and human intervention factor is larger, often results in and lures
Lead effect undesirable.
The content of the invention
The purpose of the present invention is to improve the inducing effect of changeable-message sign outside the venue.
In order to achieve the above object, the technical scheme is that providing a kind of city changeable-message sign traffic above-ground
Induction section determines method, it is characterised in that comprise the following steps：
The first step, the urban highway traffic data obtained in certain timing statisticses section, judge each road of urban streets
Whether road or section belong to often hair property jam road or section in the time period interested, comprise the following steps：
Step 1.1, the span of traffic congestion index is divided into N number of interval, N >=2, different interval correspondences are different
Traffic congestion index ranking, traffic congestion index ranking at least includes " unimpeded ", " crowded ", according in certain timing statisticses section
Urban highway traffic data calculate the traffic congestion index in each road or section in each time period urban streets, then sentence
The traffic congestion index ranking in each road or section in disconnected each time period urban streets；
The congestion coefficient of the time period interested of step 1.2, each road of calculating or section, wherein：Present road or section
Time period interested congestion coefficient for the traffic congestion index ranking in present road or section is in " crowded " and/or " gathers around
Squeeze " more than duration account for the ratio of time period duration interested；
Step 1.3, according to each road or the congestion coefficient of the time period interested in section, judge whether are each road or section
Belong to often hair property jam road or section, wherein：If the congestion coefficient in present road or section is not less than threshold value set in advance,
Then present road or section belong to often hair property jam road or section；
Second step, urban streets are divided major trunk roads, subsidiary road and branch road Three Estate, major trunk roads are connection city
The arterial highway of each major divisions, subsidiary road is to contact the additional transport route between major trunk roads, and subsidiary road constitutes road network with major trunk roads,
Branch road is the contact road between each neighbour；
3rd step, changeable-message sign induction section confirm
It is main induction section with the often property sent out jam road or section, chooses periphery major trunk roads or subsidiary road is induced.
Preferably, in the step 1.1, present road or section are TSI in the traffic congestion index of current slot,
Then have：
In formula, VfIt is free flow speed, ViIt is present road or section in the actual car of current slot
Speed.
Preferably, in the step 1.1, the span of traffic congestion index is divided into 4 intervals, respectively
[0,30), corresponding traffic congestion index ranking is " unimpeded ", [30,50), corresponding traffic congestion index ranking is for " more smooth
It is logical ", [50,70), corresponding traffic congestion index ranking is " crowded ", [70,100], and corresponding traffic congestion index ranking is
" obstruction ".
City changeable-message sign traffic above-ground induction section of the invention determines that method avoids variable information mark
Will induces the unreasonable of section, causes the phenomenons such as the wasting of resources, public discontent.Differentiate with reference to urban streets recurrent congestion
Index, category of roads discriminant criterion and changeable-message sign road inducible form, make to induce section more in changeable-message sign
Science, rationally.
Brief description of the drawings
Fig. 1 is that city changeable-message sign traffic above-ground induction section of the invention determines method structural representation.
Specific embodiment
To become apparent the present invention, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
As shown in figure 1, city changeable-message sign traffic above-ground induction section of the invention determines that method includes following step
Suddenly：
Step S-1：After obtaining the urban highway traffic data in certain timing statisticses section, carry out urban streets and often send out
The crowded differentiation of property
Urban streets recurrent congestion differentiates often to be sent out comprising traffic congestion index discriminant criterion and urban streets
Property crowded section of highway statistics.
Step S-1-1：Traffic congestion index differentiates
The traffic congestion index of urban road is fair each grade road vehicle trip congestion experience relatively of reflection
Standardized index, is core calculations parameter with road travel speed, and as a result dimensionless number of the value between 0 to 100, becomes
Represent more not smooth to 100, tend to 0 and represent that traffic is more unimpeded.Specific formula is as follows：Present road or section are when current
Between section traffic congestion index be TSI, then have：
In formula, VfIt is free flow speed, ViIt is present road or section in the actual car of current slot
Speed.
On the basis of traffic congestion index, the span of index is divided into four traffic congestion index rankings, point
Dui Ying " not unimpeded ", " more unimpeded ", " crowded " and " blocking ".Specific correspondence threshold value is as follows：
Calculate each in each time period urban streets according to the urban highway traffic data in certain timing statisticses section
Road or the traffic congestion index in section, subsequently determine whether that the traffic in each road or section in each time period urban streets is gathered around
Stifled index ranking.
Step S-1-2：Often the property sent out congested link is counted urban streets
In the present embodiment, the time period interested is chosen for peak period, then the urban streets in the present embodiment are often sent out
Property congested link statistics be related to peak period congestion duration and peak period congestion coefficient index.It is a length of during peak period congestion
In the statistical interval of the section of rush hour on the one, the traffic congestion index ranking in each road or section is in urban streets
" crowded " and the cumulative time of " blocking ".Peak period congestion coefficient is the ratio that peak duration is accounted in peak period congestion duration
Value, specific formula is as follows：
In formula, PHCC is peak period congestion coefficient, TpeakhourIt is peak duration, root
Set according to each city actual conditions, TTSI ＞ 50It is peak period congestion duration.
According to urban road actual conditions to urban road peak period congestion coefficient given threshold phcc_threshold_
value.In certain timing statisticses, if each road or road-section average peak period congestion FACTOR P HCC ' in urban streets
More than threshold value phcc_threshold_value, then it is assumed that the road or section belong to often hair property jam road or section.
Step S-2：Urban streets grade discrimination
Urban streets can divide major trunk roads, subsidiary road and branch road Three Estate.Major trunk roads are each main for connection city
The arterial highway of subregion, based on communication function.Subsidiary road is to contact the additional transport route between main roads, is constituted with major trunk roads
Road network, extensively the connection each area in city and collecting and distributing major trunk roads traffic.Branch road is also called neighbour's road, the connection between typically each neighbour
It is road.Wherein, major trunk roads and subsidiary road carry city main traffic, and urban streets traffic guidance mainly issues trunk
The traffic state information in road or subsidiary road.Information is avoided by urban road microcirculqtory system during driver obtains variable information board
Congested link, so as to lift city whole service efficiency.
Changeable-message sign can provide intuitively road status information for the public.And the traffic based on GIS figure layers
Status information can allow traffic administration person to understand city entirety road conditions in time.Layer properties can include category of roads, pass through
Direction, path length, number of track-lines grade and link name etc..Layer properties can carry out editing and processing, such as increase or delete.Cause
This, is differentiated based on category of roads in GIS map data mining platforms, with reference to the urban streets often property sent out congestion discriminant criterion, is able to confirm that
Main often hair property jam road (section), can be used as the basis that road (section) is induced in changeable-message sign.
Step S-3：Changeable-message sign induction section confirms
Changeable-message sign section inducible form mainly has four main national highways in China, two vertical three horizontal, three kinds of three horizontal strokes and two horizontal strokes three to indulge
Deng.Changeable-message sign inducible form is determined according to urban streets actual conditions, with the often property sent out jam road or
Section is main induction section, and with reference to GIS figure layer road class attribute information, the general periphery major trunk roads or subsidiary road chosen are carried out
Induction.Centered on mainly inducing section, peripheral path spacing generally comprises 2~3 crossings (being related to subsidiary road crossing).According to
This, determines city changeable-message sign traffic above-ground induction section, makes traffic guidance section more reasonable, science, and can be abundant
Play traffic guidance effect.
Claims (3)
1. a kind of city changeable-message sign traffic above-ground induction section determines method, it is characterised in that comprise the following steps：
The first step, the urban highway traffic data obtained in certain timing statisticses section, judge urban streets each road or
Whether section belongs to often hair property jam road or section in the time period interested, comprises the following steps：
Step 1.1, the span of traffic congestion index is divided into N number of interval, N >=2, the different traffic of different interval correspondences
Congestion index grade, traffic congestion index ranking at least includes " unimpeded ", " crowded ", according to the city in certain timing statisticses section
Highway traffic data calculates the traffic congestion index in each road or section in each time period urban streets, subsequently determines whether every
The traffic congestion index ranking in each road or section in individual time period urban streets；
The congestion coefficient of the time period interested of step 1.2, each road of calculating or section, wherein：Present road or the sense in section
The congestion coefficient of period of interest section for the traffic congestion index ranking in present road or section be in " crowded " and/or " crowded " with
On duration account for the ratio of time period duration interested；
Step 1.3, according to each road or the congestion coefficient of the time period interested in section, judge whether each road or section belong to
Normal hair property jam road or section, wherein：If the congestion coefficient in present road or section is not less than threshold value set in advance, when
Preceding road or section belong to often hair property jam road or section；
Second step, urban streets are divided major trunk roads, subsidiary road and branch road Three Estate, major trunk roads are the connection each master in city
The arterial highway of subregion is wanted, subsidiary road is to contact the additional transport route between major trunk roads, and subsidiary road constitutes road network, branch road with major trunk roads
It is the contact road between each neighbour；
3rd step, changeable-message sign induction section confirm
It is main induction section with the often property sent out jam road or section, chooses periphery major trunk roads or subsidiary road is induced.
2. a kind of city changeable-message sign traffic above-ground induction section as claimed in claim 1 determines method, and its feature exists
In in the step 1.1, present road or section are TSI in the traffic congestion index of current slot, then have：
In formula, VfIt is free flow speed, ViIt is present road or section in the actual vehicle speed of current slot.
3. a kind of city changeable-message sign traffic above-ground induction section as claimed in claim 1 determines method, and its feature exists
In, in the step 1.1, the span of traffic congestion index is divided into 4 intervals, and respectively [0,30), it is corresponding
Traffic congestion index ranking be " unimpeded ", [30,50), corresponding traffic congestion index ranking be " more unimpeded ", [50,70), it is right
The traffic congestion index ranking answered is " crowded ", and [70,100], corresponding traffic congestion index ranking is " obstruction ".
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| CN108520628A (en) * | 2018-04-11 | 2018-09-11 | 武汉理工大学 | A kind of system and method avoiding non-mandrel roller T-junction mouth congestion |
| CN108665715A (en) * | 2018-05-09 | 2018-10-16 | 上海电科智能系统股份有限公司 | A kind of road junction intelligent traffic is studied and judged and signal optimizing method |
| CN109360414A (en) * | 2018-09-18 | 2019-02-19 | 北京交通大学 | The often identification of hair congested link and screening method |
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| CB03 | Change of inventor or designer information |
Inventor after: Song Xiaopeng Inventor after: Zhao Huaibai Inventor after: Zheng Gang Inventor after: Li Jie Inventor after: Huan Bin Inventor after: Chen Yun Inventor before: Song Xiaopeng |
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Application publication date: 20170609 |
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