CN109243186A - A method of based on being lined up, level dynamic adjustment phase place is poor - Google Patents
A method of based on being lined up, level dynamic adjustment phase place is poor Download PDFInfo
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- CN109243186A CN109243186A CN201810942054.8A CN201810942054A CN109243186A CN 109243186 A CN109243186 A CN 109243186A CN 201810942054 A CN201810942054 A CN 201810942054A CN 109243186 A CN109243186 A CN 109243186A
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- phase difference
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- queue length
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/081—Plural intersections under common control
- G08G1/082—Controlling the time between beginning of the same phase of a cycle at adjacent intersections
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Abstract
It is adjusted the invention discloses a kind of based on the method for being lined up level dynamic adjustment phase place difference, including relative phase difference setting and absolute phase difference；It is poor according to the real-time adjustment phase place of queue length, more meet practical road network demand, reduces spillover, sky puts phenomenon.
Description
Technical field
It is the invention belongs to technical field of traffic signal control, in particular to a kind of poor based on level dynamic adjustment phase place is lined up
Method.
Background technique
Traffic signals can be separated conflicting traffic flow from the time, lead to it orderly in different time
It crosses, ensure that vehicle driving safety.As the development of modern science and automotive engineering, vehicle guaranteeding organic quantity increase, rushes in road network
Prominent intensification of contradictions, in order to it is safer, rapidly arrive at the destination, people begin to use newest scientific and technological achievement solution traffic to ask
Topic, to push the development of traffic signals field of intelligent control.
Magnitude of traffic flow dynamic change in road network, transport need are fluctuated therewith.How coordinated control system is made timely and effectively
Change with the variation of transport need, how having become one to the dynamic response of road network situation progress of variation, there is an urgent need to solve
Certainly the problem of.
In coordinated control, phase difference is key parameter, is generally divided into relative phase difference and absolute phase difference.Relative phase
Difference refers to the difference of the green light initial time of two neighboring intersection coordination phase in coordinated control, is the time of green light at adjacent two
Interval, is a relative value.Absolute phase difference refers to the coordination phase and the coordination phase of some specified intersection for coordinating crossing
The difference of position green light initial time.
Practical road network has the characteristics that dynamic fluctuation variation, both there are branch road vehicles and has driven into main road, there is also main road vehicles
Sail out of branch.However phase difference is usually fixation in existing coordinated control system, the shorter section of certain spacing is even more to deposit
Risk is being overflowed, is not adapting to practical road network feature.
Summary of the invention
In order to solve the problems in the existing technology the present invention, proposes a kind of based on queuing level dynamic adjustment phase place
The method of difference, it is poor according to the real-time adjustment phase place of queue length, more meet practical road network demand, reduces spillover, sky puts phenomenon.
The invention discloses it is a kind of based on be lined up level dynamic adjustment phase place difference method, including relative phase difference setting with
Absolute phase difference is adjusted；
The relative phase difference setting, comprising the following steps:
1.1, analysis of data collected: acquisition data queued analyzes road network queuing discipline；
1.2, divide and be lined up rank: according to queue length, dividing different queuing ranks, including " being lined up few ", " be lined up compared with
Less ", " being lined up more ", " being lined up more " etc.；
1.3, it divides virtual line-up section: for each crossing all directions, dividing a queuing section at a certain distance, often
The corresponding queuing rank in a queuing section, the corresponding queuing rank in queuing section for being such as lined up 0~30 meter is " being lined up few "；
1.4, relative phase difference is set: according to journey time between crossing and queue clearance time, each queuing section is set
Corresponding relative phase difference；
The absolute phase difference is adjusted, comprising the following steps:
2.1, detect crossing queue length: the detector set up by crossing, real-time detection crossing queue length data obtain
The data taken pass control centre back in real time；
2.2, relative phase difference is selected: according to the virtual line-up section of division, virtual line-up area where judging queue length
Between, select the relative phase difference between crossing；
2.3, absolute phase difference is calculated: after obtaining relative phase difference, the absolute phase difference at each crossing of accumulation calculating.
The utility model has the advantages that embodying following advantage after the present invention is applied to traffic signals real-time control system:
1, phase difference is adjustable, more adaptation road network actual conditions.
2, when vehicle is more, timely adjustment phase place is poor, reduces and overflows.
3, when vehicle is less, timely adjustment phase place is poor, reduces sky and puts.
4, use queue length as adjusting offset foundation, react road network actual state much sooner than the magnitude of traffic flow.
Detailed description of the invention
Fig. 1 is relative phase difference setting procedure figure of the invention；
Fig. 2 is absolute phase difference regulation flow process figure of the invention；
The relative phase difference that Fig. 3 is queuing rank of the invention when being 1 selects schematic diagram；
The relative phase difference that Fig. 4 is queuing rank of the invention when being 2 selects schematic diagram；
Fig. 5 is absolute phase difference calculating process schematic diagram of the invention.
Specific embodiment
The inventive method is further described with reference to the accompanying drawing.
The method of adjustment phase place difference proposed by the present invention, including relative phase difference setting, absolute phase difference are adjusted.
Relative phase difference setting procedure is as shown in Figure 1, include
Analysis of data collected: acquisition data queued analyzes road network queuing discipline.
In urban road network, queue length at any time with space and change, study or observe queue length variation rule
Rule, has great importance for coordinating control of traffic signals.
Divide and be lined up rank: different queue lengths correspond to different queuing ranks, including " being lined up few ", " queuing is less ",
" being lined up more ", " being lined up more " etc..
According to the queue length of analysis, different queuing ranks is divided.Queuing rank is higher, and the direction gets over congestion, occurs
The risk of spilling is higher, and it is lower that the empty possibility put occurs；Queuing rank is lower, and the direction is more unobstructed, and the empty risk put occurs and gets over
Height, the possibility overflowed are lower.It either overflows or sky is put, the Netcom that can all satisfy the need, which freely runs, to be had an impact.
It divides virtual line-up section: according to road network structure and crossing feature, dividing virtual line-up section.It is each for each crossing
Direction divides a queuing section at a certain distance.The corresponding queuing rank in each queuing section, is such as lined up 0~30 meter
The corresponding queuing rank in queuing section be " be lined up few ".
Relative phase difference is set:
Relative phase difference refers to the difference of the green light initial time of two neighboring intersection coordination phase in coordinated control, is phase
The time interval of green light, is a relative value at neighbour two.
Each queuing section corresponds to different relative phase differences.According to journey time between crossing and queue clearance time, if
Set the corresponding relative phase difference in each queuing section.The relative phase difference that 0~30 meter of queuing section is such as arranged is 20s.
Absolute phase difference regulation flow process is as shown in Figure 2.
Detect crossing queue length: the detector set up by crossing, real-time detection crossing queue length data, acquisition
Data pass control centre back in real time, complete system-level adjustment.
Upstream green light open it is bright after, upstream vehicle start toward this crossing travel.If this crossing green light open it is bright before, upstream vehicle is
Through traveling to tail portion is lined up, then queue length is studied and judged travels for upstream vehicle at the time of being lined up tail portion constantly；If this crossing is green
When lamp opens bright, upstream vehicle is not travelled to fleet's tail of the queue, then queue length is studied and judged at the time of open bright constantly for this crossing green light.
tIt studies and judges=min (t1+ Δ t, t2) (1)
Wherein, tIt studies and judgesMoment, t are studied and judged for queue length1Bright moment, t are opened for upstream crossing green light2For this crossing, green light is opened bright
Moment, Δ t are the time required to upstream vehicle is travelled to queuing tail portion.The calculation formula of Δ t is as follows.
Wherein, LSectionTo coordinate direction road section length, LIt is lined upFor the real-time queue length in this crossing,To coordinate direction average row
Journey speed.
If the 10th second is that upstream crossing green light opens the bright moment, it is 50 seconds that upstream vehicle, which is travelled to tail portion required time is lined up,.
If it is 45 seconds that this crossing green light, which opens the bright moment, queue length is studied and judged constantly as min (10+50,45)=45 seconds；If this crossing is green
It is 70 seconds that lamp, which opens the bright moment, then queue length is studied and judged constantly as min (10+50,70)=60 seconds.
Select relative phase difference
System is according to the virtual line-up section of division, virtual line-up section where judging queue length, selects between crossing
Relative phase difference, as shown in Figure 3, Figure 4.It such as detects that queue length is 15 meters, then belongs to 0~30 meter of queuing section, relatively
Phase difference is 20s.
Calculate absolute phase difference
Absolute phase difference refers to that the coordination phase for coordinating crossing and the coordination phase green light of some specified intersection originate
The difference of time.
After obtaining relative phase difference, the absolute phase difference at each crossing of accumulation calculating, as shown in Figure 5.Small cube in figure
Indicate vehicle queue length, each troop elongated may may also shorten.It is crossing 1 and crossing 3 shown in this needle drawing without row
Team, crossing 2 and crossing 5 be lined up it is elongated, crossing 4 be lined up shorten.Because absolute phase difference value range is 0~cycle length, need
According to cycle length, suitably increase and decrease several cycle lengths, the value after increase and decrease is as absolute phase difference.
The present invention is poor according to the real-time adjustment phase place of queue length, more meets practical road network demand, reduces spillover, sky is put
Phenomenon.
Claims (3)
1. a kind of based on the method for being lined up level dynamic adjustment phase place difference, it is characterised in that: including relative phase difference setting and absolutely
Phase difference is adjusted, the relative phase difference, refers to the green light initial time of two neighboring intersection coordination phase in coordinated control
Difference；The absolute phase difference refers to that the coordination phase for coordinating crossing and the coordination phase green light of some specified intersection originate
The difference of time, relative phase difference accumulation calculating obtain the absolute phase difference at each crossing；
The relative phase difference setting, comprising the following steps:
1.1, analysis of data collected: acquisition data queued analyzes road network queuing discipline；
1.2, it divides and is lined up rank: according to queue length, dividing different queuing ranks；
1.3, it divides virtual line-up section: for each crossing all directions, dividing a queuing section, Mei Gepai at a certain distance
The corresponding queuing rank in team section；
1.4, relative phase difference is set: according to journey time between crossing and queue clearance time, it is corresponding that each queuing section being set
Relative phase difference.
2. according to claim 1 a kind of based on the method for being lined up level dynamic adjustment phase place difference, it is characterised in that: described
Absolute phase difference adjust the following steps are included:
2.1, crossing queue length is detected: the detector set up by crossing, real-time detection crossing queue length data, acquisition
Data pass control centre back in real time；
2.2, relative phase difference is selected: according to the virtual line-up section of division, virtual line-up section where judging queue length, choosing
Relative phase difference between routing mouth；
2.3, absolute phase difference is calculated: after the relative phase difference in obtaining step 2.2, the absolute phase at each crossing of accumulation calculating
Potential difference.
3. according to claim 2 a kind of based on the method for being lined up level dynamic adjustment phase place difference, it is characterised in that: described
Crossing queue length data include that the moment is studied and judged in queue length, which studies and judges is expressed as follows constantly:
tIt studies and judges=min (t1+ Δ t, t2) (1)
Wherein, tIt studies and judgesMoment, t are studied and judged for queue length1Bright moment, t are opened for upstream crossing green light2When for this crossing, green light opens bright
It carves, Δ t is that upstream vehicle is travelled to tail portion required time is lined up, and the calculation formula of Δ t is as follows:
Wherein, LSectionTo coordinate direction road section length, LIt is lined upFor the real-time queue length in this crossing,To coordinate direction average stroke vehicle
Speed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113284336A (en) * | 2021-04-04 | 2021-08-20 | 北方工业大学 | Traffic state characterization method for calculating upstream and downstream intersection co-scheduling |
| WO2024140305A1 (en) * | 2022-12-30 | 2024-07-04 | 北京东土正创科技有限公司 | Green wave control method for arterial traffic |
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