CN103854494B - The control method of traffic flow, system and device - Google Patents
The control method of traffic flow, system and device Download PDFInfo
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- CN103854494B CN103854494B CN201210511318.7A CN201210511318A CN103854494B CN 103854494 B CN103854494 B CN 103854494B CN 201210511318 A CN201210511318 A CN 201210511318A CN 103854494 B CN103854494 B CN 103854494B
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Abstract
The invention discloses the control method of a kind of traffic flow, system and device.The method includes: control whether the current downstream road junction of device identification exceedes preset downstream road junction average queue amount by downstream road junction, in response to exceeding this preset value, downstream road junction controls device calculating downstream road junction currently can accommodate queue size, and according to combining the vehicle pass-through probability of upstream road junction roadway, calculate the traffic volume of upstream road junction roadway.Downstream road junction controls device and the traffic volume of upstream road junction roadway feeds back to crossing, upstream control device so that crossing, upstream controls device can make flow-control according to the traffic volume of traffic volume and local policy that downstream road junction controls device feedback.Technical scheme proposed by the invention, it is achieved that the Based Intelligent Control of traffic flow based on feedback of status, using the teaching of the invention it is possible to provide the traffic flow more optimized controls.
Description
Technical field
The present invention relates to control field, particularly to control method, system and the device of a kind of traffic flow.
Background technology
In Current traffic control system, owing to each closes on each to enter according to the flow control policy of oneself between crossing
Row traffic control, does not has the mutual of flow information each other, when there is choking phenomenon in certain crossing, and the crossing that periphery closes on
Owing to not knowing congestion situations, still it is operated according to the crossing state of oneself administration, so may increase the weight of to block crossing
Traffic pressure.
Shown in Figure 1, such as, vehicle walked to crossing A by crossing B, wherein crossing B be crossing A crossing, upstream (with
Crossing, lower abbreviation upstream), crossing A is the downstream road junction (hereinafter referred to as downstream road junction) of crossing B.The vehicle of crossing B respectively by B1,
B2, B3 track, i.e. the left-hand rotation of crossing B, craspedodrome, right-turn lane sail crossing A into.
Owing to there is no communication each other between crossing B and crossing A, therefore, when blocking occurs in crossing A, crossing B is not
The generation of this congestion situations can be known in time, continue the local control strategy according to crossing B, it is allowed to vehicle is respectively by B1, B2, B3
Input BA section, track, thus cause the obstruction in BA section, even increase the weight of the congestion situations of crossing A.
Visible, independent local vehicle flow controls to carry out traffic control, no only in accordance with local flow control policy
The congestion situations of energy perception adjacent intersection in time, even increases the weight of the congestion situation of congested link.
Summary of the invention
An aspect according to embodiments of the present invention, one to be solved technical problem is that: provide a kind of traffic flow
Control method, system and device, with provide traffic flow based on feedback of status Based Intelligent Control.
The control system of a kind of traffic flow that the embodiment of the present invention provides, described system includes: downstream road junction controls dress
Put, crossing, upstream controls device；
Described downstream road junction control device, for identify downstream road junction current vehicle flow queue amount Lz whether exceed preset under
Trip crossing average queue amount La；Described downstream road junction average queue is exceeded in response to described downstream road junction current vehicle flow queue amount Lz
Amount La, calculates downstream road junction and currently can accommodate queue size Lc；Queue size Lc and upstream currently can be accommodated according to described downstream road junction
The vehicle pass-through probability bi of road junction roadway, calculates the traffic volume Li of upstream road junction roadway；Passing through described upstream road junction roadway
Amount Li is sent to crossing, upstream and controls device；
Crossing, described upstream controls device, for identifying whether to receive the crossing, upstream of downstream road junction control device transmission
The traffic volume Li in track, in response to the traffic volume Li receiving described upstream road junction roadway；Relatively described upstream road junction roadway is logical
Row amount Li and the size of the traffic volume of the local policy of predetermined upstream road junction roadway, use a work less in comparative result
For controlling parameter, control the traffic signal devices of described upstream road junction roadway.
Preferably, described downstream road junction controls device, works as especially by calculating the described downstream road junction of acquisition with lower inequality
Before can accommodate queue size Lc:
Lc+Lz≤K × Lmax,
Wherein, Lz be downstream road junction current vehicle flow queue amount, Lmax be that predetermined downstream road junction maximum accommodates queue size, K
For predetermined proportionality coefficient, the value of K is 0 ＜ K≤1.
Preferably, described upstream road junction roadway is n, the vehicle pass-through probability bi sum in n track, crossing, described upstream
Meet below equation:
B1+b2+bi+ ...+bn=1, bi are the vehicle pass-through probability in i-th track, crossing, upstream, i be natural number also
And 1≤i≤n.
Preferably, crossing, described upstream controls device, is additionally operable to the vehicle pass-through probability bi in i-th track, crossing, upstream
Being sent to described downstream road junction and control device, wherein, i is natural number and 1≤i≤n；
Described downstream road junction controls device, especially by the traffic volume Li in below equation calculating i-th track, crossing, upstream:
Li=Lc × bi,
Wherein, Lc is that described downstream road junction currently can accommodate queue size, and bi is the vehicle pass-through in i-th track, crossing, upstream
Probability, i is natural number and 1≤i≤n.
Preferably, described downstream road junction controls device and described downstream road junction controls between device by IP-based wired
Communication network or cordless communication network carry out data communication；
Described cordless communication network includes global system for mobile communications GSM, CDMA CDMA, GPRS (general packet radio service)
GPRS, WCDMA WCDMA, CDMA2000 1x, CDMA 2000 1X EVDO, TD SDMA TDSCDMA,
Any one in Long Term Evolution project LTE.
Preferably, described system also includes: harvester, is used for gathering described downstream road junction current vehicle flow queue amount Lz；
Described harvester, specifically for any one by include in sensor, video monitoring, ultrasonic listening mode
Plant and gather described downstream road junction current vehicle flow queue amount Lz.
The control method of a kind of traffic flow that the embodiment of the present invention provides, described method includes:
Whether downstream road junction control device identification downstream road junction current vehicle flow queue amount Lz exceedes preset downstream road junction is put down
All queue size La；
Exceed described downstream road junction average queue amount La in response to described downstream road junction current vehicle flow queue amount Lz, described under
Trip crossing controls device calculating downstream road junction currently can accommodate queue size Lc；
Described downstream road junction controls device currently can accommodate queue size Lc and upstream road junction roadway according to described downstream road junction
Vehicle pass-through probability bi, calculate the traffic volume Li of upstream road junction roadway；
Described downstream road junction controls device and the traffic volume Li of described upstream road junction roadway is sent to upstream road junction roadway
Traffic volume Li；
Crossing, described upstream controls device and identifies whether to receive the upstream road junction roadway that downstream road junction control device sends
Traffic volume Li；
Crossing, described upstream controls device in response to receiving the traffic volume Li in i-th track, crossing, described upstream, compares
The traffic volume Li of described upstream road junction roadway and the size of the traffic volume of the local policy of predetermined upstream road junction roadway, use ratio
Less in relatively result one, as controlling parameter, controls the traffic signal devices of described upstream road junction roadway.
Preferably, the described downstream road junction of described calculating currently can accommodate queue size Lc, calculates especially by with lower inequality
Obtain:
Lc+Lz≤K × Lmax,
Wherein, Lz be downstream road junction current vehicle flow queue amount, Lmax be that predetermined downstream road junction maximum accommodates queue size, K
For predetermined proportionality coefficient, the value of K is 0 ＜ K≤1.
Preferably, described upstream road junction roadway is n, the vehicle pass-through probability bi in i-th track, described upstream crossing n
The vehicle pass-through probability sum in individual track meets below equation:
B1+b2+bi+ ...+bn=1, bi are the vehicle pass-through probability in i-th track, crossing, upstream, i be natural number also
And 1≤i≤n.
Preferably, described method also includes:
Crossing, described upstream controls device and the vehicle pass-through probability bi in i-th track, crossing, upstream is sent to described downstream
Crossing controls device, and wherein, i is natural number and 1≤i≤n, and n is upstream road junction roadway number；
The traffic volume Li of described calculating upstream road junction roadway, specifically includes:
Calculate the traffic volume Li in i-th track, crossing, upstream, wherein, calculate crossing, upstream i-th car by below equation
The traffic volume Li in road:
Li=Lc × bi,
Wherein, Lc is that described downstream road junction currently can accommodate queue size, and bi is the vehicle pass-through in i-th track, crossing, upstream
Probability, i is natural number and 1≤i≤n.
Preferably, described downstream road junction controls device and described downstream road junction controls between device by IP-based wired
Communication network or cordless communication network carry out data communication；
Described cordless communication network includes global system for mobile communications GSM, CDMA CDMA, GPRS (general packet radio service)
GPRS, WCDMA WCDMA, CDMA2000 1x, CDMA 2000 1X EVDO, TD SDMA TDSCDMA,
Any one in Long Term Evolution project LTE.
Preferably, described method also includes: by any one in sensor, video monitoring, ultrasonic listening mode
Gather described downstream road junction current vehicle flow queue amount Lz.
The control device of a kind of traffic flow that the embodiment of the present invention provides, including:
Recognition unit, for identifying whether downstream road junction current vehicle flow queue amount Lz exceedes the average team of preset downstream road junction
Row amount La；
Computing unit, for exceeding the average team of described downstream road junction in response to described downstream road junction current vehicle flow queue amount Lz
Row amount La, calculates downstream road junction and currently can accommodate queue size Lc；Queue size Lc currently can be accommodated with upper according to described downstream road junction
The vehicle pass-through probability bi of trip road junction roadway, calculates the traffic volume Li of upstream road junction roadway；
First communication unit, controls device for the traffic volume Li of described upstream road junction roadway is sent to crossing, upstream,
So that crossing, described upstream controls the traffic volume Li of device more described upstream road junction roadway and predetermined upstream road junction roadway
The size of traffic volume of local policy, and use less in comparative result one as controlling parameter, control described upstream
The traffic signal devices of road junction roadway.
Preferably, described control device also includes:
Collecting unit, under described by any one collection in sensor, video monitoring, ultrasonic listening mode
Trip crossing current vehicle flow queue amount Lz.
Preferably, described control device also includes:
Second communication unit, for when described control device controls device as crossing, upstream, receiving described upstream road
The traffic volume Li in mouth track；
Control decision unit, for the relatively traffic volume upstream road junction roadway of described upstream road junction roadway traffic volume Li with
The size of the traffic volume of the local policy of predetermined upstream road junction roadway, uses less in comparative result one as controlling ginseng
Number, controls the traffic signal devices of described upstream road junction roadway.
The control method of traffic flow, system and the device provided based on the above embodiment of the present invention, passes through downstream road junction
Control whether the current downstream road junction of device identification exceedes preset downstream road junction average queue amount, in response to exceeding this preset value,
Being likely to occur improper traffic conditions, downstream road junction controls device and calculates downstream road junction and currently can accommodate queue size, and according to
In conjunction with the vehicle pass-through probability of upstream road junction roadway, calculate the traffic volume of upstream road junction roadway.Afterwards, downstream road junction controls device
The traffic volume of upstream road junction roadway is fed back to crossing, upstream and controls device so that crossing, upstream controls device can be according to downstream
The traffic volume of traffic volume and local policy that crossing controls device feedback carries out Integrated comparative so that in the control determining crossing, upstream
The traffic at local crossing of reality is not only considered, it is also contemplated that the state of downstream road junction during system strategy.
Self traffic is noticed, as upstream crossing traffic control system to its crossing, upstream system by downstream road junction
One of important evidence of implementation strategy, it is achieved that the Based Intelligent Control of traffic flow based on feedback of status, using the teaching of the invention it is possible to provide more optimize
Traffic control strategy, even if there is car blockage situation, adjacent intersection also can perceive congestion situations in time, thus implements excellent
The vehicle flowrate changed controls, and alleviates Congestion Level SPCC, it is achieved the optimal control of traffic flow.
By detailed description to the exemplary embodiment of the present invention referring to the drawings, the further feature of the present invention and
Advantage will be made apparent from.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used
To obtain other accompanying drawing according to these accompanying drawings.
Simultaneously, it should be appreciated that for the ease of describing, the size of the various piece shown in accompanying drawing is not according to reality
Proportionate relationship draw.Similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it is further discussed in accompanying drawing subsequently.
The accompanying drawing of the part constituting description describes embodiments of the invention, and is used for together with the description solving
Release the principle of the present invention.
Referring to the drawings, according to detailed description below, the present invention can be more clearly understood from, wherein:
Fig. 1 illustrates the track schematic diagram of adjacent intersection；
Fig. 2 illustrates the schematic flow sheet of a kind of embodiment of control method of traffic flow provided by the present invention；
Fig. 3 illustrates the structural representation of a kind of embodiment of control system of traffic flow provided by the present invention；
Fig. 4 illustrates the structural representation controlling a kind of embodiment of device of traffic flow provided by the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Should note
Meaning arrives: unless specifically stated otherwise, and the parts and the positioned opposite of step that illustrate the most in these embodiments are not intended to this
Bright scope.
Description only actually at least one exemplary embodiment is illustrative below, never as to the present invention
And any restriction applied or use.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The every other embodiment obtained under the property made work premise, broadly falls into the scope of protection of the invention.
May be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of when, described technology, method and apparatus should be considered to authorize a part for description.
It is shown here that any occurrence should be construed as merely exemplary with in all examples discussed, and not
It is as restriction.Therefore, other example of exemplary embodiment can have different values.
Shown in Figure 2, Fig. 2 illustrates that the flow process of a kind of embodiment of control method of traffic flow provided by the present invention is shown
It is intended to.In this embodiment, the control method of traffic flow includes:
201, downstream road junction controls whether device identification downstream road junction current vehicle flow queue amount Lz exceedes preset downstream road
Mouth average queue amount La；
202, exceed downstream road junction average queue amount La, downstream road junction control in response to downstream road junction current vehicle flow queue amount Lz
Device processed calculates downstream road junction currently can accommodate queue size Lc；
203, downstream road junction controls the car that device currently can accommodate queue size Lc and upstream road junction roadway according to downstream road junction
Current probability bi, calculates the traffic volume Li of upstream road junction roadway；
204, downstream road junction controls device and the traffic volume Li of upstream road junction roadway is sent to the current of upstream road junction roadway
Amount Li；
205, crossing, upstream controls device and identifies whether to receive the upstream road junction roadway that downstream road junction control device sends
Traffic volume Li；
206, crossing, upstream controls device in response to receiving the traffic volume Li in i-th track, crossing, upstream, compares upstream
The traffic volume Li of road junction roadway and the size of the traffic volume of the local policy of predetermined upstream road junction roadway, use in comparative result
Less one, as controlling parameter, controls the traffic signal devices of upstream road junction roadway.
The control method of the traffic flow that the above embodiment of the present invention provides, by downstream road junction to its crossing, upstream system
Notice self traffic, as one of the important evidence of upstream crossing traffic control system implementation strategy, it is achieved that based on shape
The Based Intelligent Control of the traffic flow of state feedback, using the teaching of the invention it is possible to provide the traffic control strategy more optimized, even if car blockage situation occurs,
Adjacent intersection also can perceive congestion situations in time, thus the vehicle flowrate implementing to optimize controls, and alleviates Congestion Level SPCC, it is achieved traffic
The optimal control of flow.
Crossing, upstream controls device specifically used control parameter, and the traffic signal devices controlling upstream road junction roadway can root
It is embodied as according to mode well known to those skilled in the art.
A concrete example according to the inventive method embodiment, calculates downstream road junction and currently can accommodate queue size Lc, tool
Body obtains by calculating with lower inequality:
Lc+Lz≤K × Lmax, wherein, Lz be downstream road junction current vehicle flow queue amount, Lmax be predetermined downstream road junction
Accommodating greatly queue size, K is predetermined proportionality coefficient, and the value of K is 0 ＜ K≤1.
The setting of K is determined by road management, also affects the size of the result of calculation of Lc.Such as, road management determines road
Take and can reach 100%, now K=1, then LC+LZ≤LMAX.If regulation only allows to take 80%, then LC+LZ≤
80% × LMAX.Calculate the maximum of the Lc value that this inequality obtains, for the traffic volume of subsequent calculations upstream road junction roadway
Li.Certainly, Lc can also take the numerical value less than this maximum.
A concrete example according to the inventive method embodiment, upstream road junction roadway is n, the vehicle in i-th track
Current probability bi, the vehicle pass-through probability sum in n track, crossing, upstream meets below equation: b1+b2+bi+ ...+bn=
1。
A concrete example according to the inventive method embodiment, the method also includes:
Crossing, upstream controls device and the vehicle pass-through probability bi in i-th track, crossing, upstream is sent to downstream road junction control
Device, wherein, i is natural number and 1≤i≤n, and n is upstream road junction roadway number.Calculate the traffic volume of upstream road junction roadway
Li, specifically includes:
Calculate the traffic volume Li in i-th track, crossing, upstream, wherein, calculate crossing, upstream i-th car by below equation
The traffic volume Li in road:
Li=Lc × bi, wherein, Lc is that downstream road junction currently can accommodate queue size, and bi is i-th track, crossing, upstream
Vehicle pass-through probability, i is natural number and 1≤i≤n.
A concrete example according to the inventive method embodiment, crossing, upstream controls device and controls device with downstream road junction
Between carry out data communication by IP-based wireline communication network or cordless communication network.Cordless communication network can include
Global system for mobile communications (GlobalSystem of Mobile communication, GSM), CDMA (Code
DivisionMultiple Access, CDMA), general packet radio service (General Packet RadioService,
GPRS), WCDMA (Wideband Code Division MultipleAccess, WCDMA), CDMA2000 1x,
CDMA2000 1x EV-DO, TD SDMA (Time Division-Synchronous Code Division
MultipleAccess, TD SCDMA), any one in Long Term Evolution project (Long Term Evolution, LTE).
A concrete example according to the inventive method embodiment, by sensor, video monitoring, ultrasonic detection method
In any one method gather downstream road junction current vehicle flow queue amount Lz.
It is illustratively described one specific embodiment of the inventive method below.With continued reference to shown in Fig. 1, under normal circumstances,
BA crossing can accommodate 20 cars altogether, i.e. Lmax is 20.During the green light of B crossing, crossing, upstream B1, tri-directions of B2, B3 will be divided
Not to A 5 cars of clearance, the traffic volume of the local policy of the most predetermined upstream road junction roadway is respectively 5.Downstream road junction average queue
Amount La is 8, and downstream road junction average queue amount can be drawn by historical data statistics.
When A crossing burst accident, cause having 10 cars to be trapped on A crossing or BA track, side, A crossing, i.e. downstream road junction
Current vehicle flow queue amount Lz is 10, and downstream road junction current vehicle flow queue amount can be gathered by aforementioned acquisition method.Downstream road junction
Control device and exceed downstream road junction average queue amount La=8 in response to identifying downstream road junction current vehicle flow queue amount Lz=10,
Downstream road junction controls device calculating downstream road junction currently can accommodate queue size Lc:Lc+Lz≤K × Lmax, wherein it is possible to set K
Be 1, then Lc≤10.Lc maximum occurrences is 10.The vehicle pass-through probability b1+b2+b3=1 in three tracks, crossing, upstream, if b1=b2
=b3=1/3, then for the traffic volume L1=L2=L3 of each upstream road junction roadway, be Lc × bi=10 × (1/3), closely
It is seemingly 3.The most each upstream road junction roadway allows by 3 cars, so that 19 cars are at most detained in BA section.It is appreciated that Lc
The numerical value less than this maximum 3 can also be taken.
Assuming that the accident at A crossing is very serious, block completely, these 19 cars are still trapped in BA section, have no longer allowed car
Come, then the traffic lights in three directions, B crossing will always red light, no longer to A-B section clearance vehicle, until BA section
Congestion relief.
If according to the said method embodiment not using the present invention to provide, direction, 3 B crossings still according to a lamp to A
Let pass if 5 cars, then BA road will have 25 cars, exceed road capacity, increase the weight of congestion situations.
During it should be noted that above-mentioned calculating, can change between the numerical value for calculating, such as, team
Change between length and the number of vehicle of row amount.
Shown in Figure 3, Fig. 3 shows that the structure of a kind of embodiment of control system of the traffic flow that the present invention provides is shown
It is intended to.The system of this embodiment includes: downstream road junction controls device 301, crossing, upstream controls device 302.
Downstream road junction control device 301, for identify downstream road junction current vehicle flow queue amount Lz whether exceed preset under
Trip crossing average queue amount La；Downstream road junction average queue amount La is exceeded, meter in response to downstream road junction current vehicle flow queue amount Lz
Calculate downstream road junction and currently can accommodate queue size Lc；The car of queue size Lc and upstream road junction roadway currently can be accommodated according to downstream road junction
Current probability bi, calculates the traffic volume Li of upstream road junction roadway；The traffic volume Li of upstream road junction roadway is sent to upstream road
Mouth controls device；
Crossing, upstream controls device 302, for identifying whether to receive the traffic volume Li of upstream road junction roadway；In response to connecing
Receive the traffic volume Li of upstream road junction roadway, compare the traffic volume Li of upstream road junction roadway and this locality of predetermined upstream road junction roadway
The size of the traffic volume of strategy, uses less in comparative result one as controlling parameter, controls the friendship of upstream road junction roadway
Messenger device.
One concrete example of system according to the invention embodiment, downstream road junction controls device, especially by following
Formula calculates and obtains downstream road junction and currently can accommodate queue size Lc:
Lc+Lz≤K × Lmax,
Wherein, Lz be downstream road junction current vehicle flow queue amount, Lmax be that predetermined downstream road junction maximum accommodates queue size, K
For predetermined proportionality coefficient, the value of K is 0 ＜ K≤1.
One concrete example of system according to the invention embodiment, upstream road junction roadway is n, track, n, crossing, upstream
Vehicle pass-through probability bi sum meet below equation:
B1+b2+bi+ ...+bn=1, bi are the vehicle pass-through probability in i-th track, crossing, upstream, i be natural number also
And 1≤i≤n.
One concrete example of system according to the invention embodiment, crossing, upstream controls device, is additionally operable to crossing, upstream
The vehicle pass-through probability bi in i-th track is sent to downstream road junction and controls device, and wherein, i is natural number and 1≤i≤n；
Downstream road junction controls device, especially by the traffic volume Li in below equation calculating i-th track, crossing, upstream:
Li=Lc × bi, wherein, Lc is that downstream road junction currently can accommodate queue size, and bi is i-th track, crossing, upstream
Vehicle pass-through probability, i is natural number and 1≤i≤n.
One concrete example of system according to the invention embodiment, downstream road junction controls device and controls device with downstream road junction
Between carry out data communication by IP-based wireline communication network or cordless communication network；
Cordless communication network includes global system for mobile communications GSM, CDMA CDMA, GPRS (general packet radio service)
GPRS, WCDMA WCDMA, CDMA2000 1x, CDMA 2000 1X EVDO, TD SDMA TD
Any one in SCDMA, Long Term Evolution project LTE.
One concrete example of system according to the invention embodiment, this system also includes: harvester, is used for gathering downstream
Crossing current vehicle flow queue amount Lz.Harvester is any one by include in sensor, video monitoring, ultrasonic detection method
The method of kind gathers downstream road junction current vehicle flow queue amount Lz.
Shown in Figure 4, the figure shows the structure controlling a kind of embodiment of device of the traffic flow that the present invention provides
Schematic diagram.This control device can control device as downstream road junction.This control device includes:
Recognition unit 401, for identifying whether downstream road junction current vehicle flow queue amount Lz exceedes preset downstream road junction and put down
All queue size La；
Computing unit 402, for exceeding downstream road junction average queue amount in response to downstream road junction current vehicle flow queue amount Lz
La, calculates downstream road junction and currently can accommodate queue size Lc；Queue size Lc and crossing, upstream car currently can be accommodated according to downstream road junction
The vehicle pass-through probability bi in road, calculates the traffic volume Li of upstream road junction roadway；
First communication unit 403, controls device for the traffic volume Li of upstream road junction roadway is sent to crossing, upstream, with
Make crossing, upstream control device and compare the traffic volume Li of upstream road junction roadway and the local policy of predetermined upstream road junction roadway
The size of traffic volume, and use less in comparative result one as controlling parameter, control the traffic of upstream road junction roadway
Advertiser.
Control a concrete example of device embodiment according to the present invention, control device and also include:
Collecting unit 404, for adopting by any one method in sensor, video monitoring, ultrasonic detection method
Collection downstream road junction current vehicle flow queue amount Lz.
Control a concrete example of device embodiment according to the present invention, control device and also control dress as downstream road junction
Putting, this control device also includes:
Second communication unit 405, for receiving the traffic volume Li of upstream road junction roadway；
Control decision unit 406, for compare upstream road junction roadway traffic volume upstream road junction roadway traffic volume Li with
The size of the traffic volume of the local policy of predetermined upstream road junction roadway, uses less in comparative result one as controlling ginseng
Number, controls the traffic signal devices of upstream road junction roadway.
First communication unit 403 and the second communication unit 405 can be by IP-based wireline communication networks or wireless
Communication network carries out data communication with the control device of adjacent intersection.Cordless communication network include global system for mobile communications GSM,
CDMA CDMA, general packet radio service gprs, WCDMA WCDMA, CDMA2000 1x, CDMA 20001X
Any one in EVDO, TD SDMA TD SCDMA, Long Term Evolution project LTE.
So far, the control method of a kind of traffic flow, system and device according to the present invention are described in detail.In order to
Avoid covering the design of the present invention, do not describe details more known in the field.Those skilled in the art are according to above
Describe, completely it can be appreciated how implement technical scheme disclosed herein.
In this specification, each embodiment all uses the mode gone forward one by one to describe, and what each embodiment stressed is and it
The difference of its embodiment, same or analogous part cross-reference between each embodiment.For system, device in fact
For executing example, owing to it is the most corresponding with embodiment of the method, so describe is fairly simple, relevant part sees embodiment of the method
Part illustrate.
The control method of the traffic flow of the present invention, system and device may be achieved in many ways.Such as, can pass through
Software, hardware, firmware or software, hardware, any combination of firmware realize the control method of the traffic flow of the present invention, are
System and device.For the said sequence of step of described method merely to illustrate, the step of the method for the present invention does not limits
In order described in detail above, unless specifically stated otherwise.Additionally, in certain embodiments, also can be by the present invention
Being embodied as the program recorded in the recording medium, these programs include referring to for the machine readable realizing the method according to the invention
Order.Thus, the present invention also covers the record medium of the storage program for performing the method according to the invention.
Although by example, some specific embodiments of the present invention have been described in detail, but the skill of this area
Art personnel are it should be understood that above example is merely to illustrate rather than in order to limit the scope of the present invention.The skill of this area
Art personnel are it should be understood that can modify to above example without departing from the scope and spirit of the present invention.This
Bright scope is defined by the following claims.
Claims (18)
1. the control system of a traffic flow, it is characterised in that described system includes: downstream road junction controls device, upstream road
Mouth controls device；
Described downstream road junction controls device, for identifying whether downstream road junction current vehicle flow queue amount Lz exceedes preset downstream road
Mouth average queue amount La；Described downstream road junction average queue amount is exceeded in response to described downstream road junction current vehicle flow queue amount Lz
La, calculates downstream road junction and currently can accommodate queue size Lc；Queue size Lc and upstream road currently can be accommodated according to described downstream road junction
The vehicle pass-through probability bi in mouth track, calculates the traffic volume Li of upstream road junction roadway；Traffic volume by described upstream road junction roadway
Li is sent to crossing, upstream and controls device；
Crossing, described upstream controls device, for identifying whether to receive the upstream road junction roadway of downstream road junction control device transmission
Traffic volume Li, in response to the traffic volume Li receiving described upstream road junction roadway；The relatively traffic volume of described upstream road junction roadway
Li and the size of the traffic volume of the local policy of predetermined upstream road junction roadway, use less in comparative result one as control
Parameter processed, controls the traffic signal devices of described upstream road junction roadway.
System the most according to claim 1, it is characterised in that described downstream road junction control device, especially by following not
Equation calculates and obtains described downstream road junction and currently can accommodate queue size Lc:
Lc+Lz≤K × Lmax,
Wherein, Lz be downstream road junction current vehicle flow queue amount, Lmax be that predetermined downstream road junction maximum accommodates queue size, K is pre-
Fixed proportionality coefficient, the value of K is 0 ＜ K≤1.
System the most according to claim 2, it is characterised in that described upstream road junction roadway is n, described upstream crossing n
The vehicle pass-through probability bi sum in individual track meets below equation:
B1+b2+bi+ ...+bn=1, bi are the vehicle pass-through probability in i-th track, crossing, upstream, i be natural number and 1≤i≤
n。
System the most according to claim 3, it is characterised in that crossing, described upstream controls device, is additionally operable to upstream road
The vehicle pass-through probability bi in mouth i-th track is sent to described downstream road junction and controls device, and wherein, i is natural number and 1≤i
≤n；
Described downstream road junction controls device, especially by the traffic volume Li in below equation calculating i-th track, crossing, upstream:
Li=Lc × bi,
Wherein, Lc is that described downstream road junction currently can accommodate queue size, and bi is that the vehicle pass-through in i-th track, crossing, upstream is general
Rate, i is natural number and 1≤i≤n.
5. according to the system of Claims 1-4 any one, it is characterised in that crossing, described upstream control device with described under
Trip crossing controls to carry out data communication by IP-based wireline communication network or cordless communication network between device；
Described cordless communication network includes global system for mobile communications GSM, CDMA CDMA, GPRS (general packet radio service)
GPRS, WCDMA WCDMA, CDMA2000 1x, CDMA 2000 1X EVDO, TD SDMA TD
Any one in SCDMA, Long Term Evolution project LTE.
System the most according to claim 5, it is characterised in that described system also includes: harvester, is used for gathering described downstream
Crossing current vehicle flow queue amount Lz；
Described harvester, specifically for by downstream road junction current vehicle flow queue amount Lz described in sensor acquisition.
System the most according to claim 6, it is characterised in that described sensor is for video monitoring or ultrasonic listening
Mode gather described downstream road junction current vehicle flow queue amount Lz.
8. the control method of a traffic flow, it is characterised in that described method includes:
Downstream road junction controls whether device identification downstream road junction current vehicle flow queue amount Lz exceedes the average team of preset downstream road junction
Row amount La；
Described downstream road junction average queue amount La, described downstream road is exceeded in response to described downstream road junction current vehicle flow queue amount Lz
Mouth controls device calculating downstream road junction currently can accommodate queue size Lc；
Described downstream road junction controls the car that device currently can accommodate queue size Lc and upstream road junction roadway according to described downstream road junction
Current probability bi, calculates the traffic volume Li of upstream road junction roadway；
Described downstream road junction controls device and the traffic volume Li of described upstream road junction roadway is sent to crossing, upstream control device；
Crossing, described upstream controls device and identifies whether to receive downstream road junction and control the logical of upstream road junction roadway that device sends
Row amount Li；
Crossing, described upstream controls device in response to receiving the traffic volume Li in i-th track, crossing, described upstream, the most described
The traffic volume Li of upstream road junction roadway and the size of the traffic volume of the local policy of predetermined upstream road junction roadway, use and compare knot
Less in Guo one, as controlling parameter, controls the traffic signal devices of described upstream road junction roadway.
Method the most according to claim 8, it is characterised in that the described downstream road junction of described calculating currently can accommodate queue size
Lc, obtains especially by calculating with lower inequality:
Lc+Lz≤K × Lmax,
Wherein, Lz be downstream road junction current vehicle flow queue amount, Lmax be that predetermined downstream road junction maximum accommodates queue size, K is pre-
Fixed proportionality coefficient, the value of K is 0 ＜ K≤1.
Method the most according to claim 9, it is characterised in that described upstream road junction roadway is n, the car in i-th track
Current probability bi, the vehicle pass-through probability sum in n track, crossing, described upstream meets below equation:
B1+b2+bi+ ...+bn=1, bi are the vehicle pass-through probability in i-th track, crossing, upstream, i be natural number and 1≤i≤
n。
11. methods according to claim 10, it is characterised in that described method also includes:
Crossing, described upstream controls device and the vehicle pass-through probability bi in i-th track, crossing, upstream is sent to described downstream road junction
Controlling device, wherein, i is natural number and 1≤i≤n, and n is upstream road junction roadway number；
The traffic volume Li of described calculating upstream road junction roadway, specifically includes:
Calculate the traffic volume Li in i-th track, crossing, upstream, wherein, calculate i-th track, crossing, upstream by below equation
Traffic volume Li:
Li=Lc × bi,
Wherein, Lc is that described downstream road junction currently can accommodate queue size, and bi is that the vehicle pass-through in i-th track, crossing, upstream is general
Rate, i is natural number and 1≤i≤n.
12. according to Claim 8 to the method described in 11 any one, it is characterised in that crossing, described upstream control device with
Described downstream road junction controls to carry out data communication by IP-based wireline communication network or cordless communication network between device；
Described cordless communication network includes global system for mobile communications GSM, CDMA CDMA, GPRS (general packet radio service)
GPRS, WCDMA WCDMA, CDMA2000 1x, CDMA 2000 1X EVDO, TD SDMA TD
Any one in SCDMA, Long Term Evolution project LTE.
13. methods according to claim 12, it is characterised in that described method also includes: described in sensor acquisition
Downstream road junction current vehicle flow queue amount Lz.
14. methods according to claim 13, it is characterised in that visited with video monitoring or ultrasound wave by described sensor
The mode surveyed gathers described downstream road junction current vehicle flow queue amount Lz.
The control device of 15. 1 kinds of traffic flow, it is characterised in that including:
Recognition unit, for identifying whether downstream road junction current vehicle flow queue amount Lz exceedes preset downstream road junction average queue amount
La；
Computing unit, for exceeding described downstream road junction average queue amount in response to described downstream road junction current vehicle flow queue amount Lz
La, calculates downstream road junction and currently can accommodate queue size Lc；Queue size Lc and upstream road currently can be accommodated according to described downstream road junction
The vehicle pass-through probability bi in mouth track, calculates the traffic volume Li of upstream road junction roadway；
First communication unit, controls device for the traffic volume Li of described upstream road junction roadway is sent to crossing, upstream, so that
Obtain crossing, described upstream and control the traffic volume Li of device more described upstream road junction roadway and the basis of predetermined upstream road junction roadway
The size of the traffic volume of ground strategy, and use less in comparative result one as controlling parameter, control crossing, described upstream
The traffic signal devices in track.
16. control devices according to claim 15, it is characterised in that described control device also includes:
Collecting unit, for by downstream road junction current vehicle flow queue amount Lz described in sensor acquisition.
17. control devices according to claim 16, it is characterised in that described sensor is for video monitoring or ultrasonic
The mode of ripple detection gathers described downstream road junction current vehicle flow queue amount Lz.
18. control devices according to claim 15, it is characterised in that crossing, described upstream controls device and includes:
Second communication unit, for receiving the traffic volume Li of upstream road junction roadway；
Control decision unit, for traffic volume Li and this locality of predetermined upstream road junction roadway of relatively described upstream road junction roadway
The size of the traffic volume of strategy, uses less in comparative result one as controlling parameter, controls described upstream road junction roadway
Traffic signal devices.
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| CN105321358A (en) * | 2014-07-31 | 2016-02-10 | 段绍节 | Urban road intersection and road traffic intelligent network real-time command system |
| CN106023607A (en) * | 2015-03-25 | 2016-10-12 | 贵州省交通规划勘察设计研究院股份有限公司 | Traffic light control method and system |
| CN105608914A (en) * | 2016-03-17 | 2016-05-25 | 佛山市高明区云大机械科技有限公司 | Traffic control system based on traffic flow |
| CN106846840B (en) * | 2017-04-20 | 2019-09-13 | 成都信息工程大学 | A kind of method for controlling traffic signal lights based on vehicle flow |
| CN111667700A (en) * | 2020-04-24 | 2020-09-15 | 安徽三联学院 | Intersection variable lane control method based on short-term traffic state prediction |
| CN113470390B (en) * | 2021-07-09 | 2022-08-05 | 公安部交通管理科学研究所 | Multiphase dynamic coordination control method for short-link intersection edge node fusion |
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