CN108898858A - The signal coordinating control method of continuous intersection under a kind of supersaturation traffic behavior - Google Patents
The signal coordinating control method of continuous intersection under a kind of supersaturation traffic behavior Download PDFInfo
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- CN108898858A CN108898858A CN201810681134.2A CN201810681134A CN108898858A CN 108898858 A CN108898858 A CN 108898858A CN 201810681134 A CN201810681134 A CN 201810681134A CN 108898858 A CN108898858 A CN 108898858A
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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
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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
Abstract
The present invention relates to a kind of signal coordinating control methods of continuous intersection under supersaturated traffic behavior, and this method comprises the following steps：(1) queue length for monitoring each each phase in intersection in real time determines the most downstream intersection that congestion occurs when getting congestion；(2) judge the queue length Q of any one phase of most downstream intersection d phase in current perioddWhether queue length upper limit value Q is reachedd_max, if so, next period is by the Green extension Δ G of the intersection d phase of most downstreamdAnd step (3) are executed, otherwise complete regulation；(3) key signal phase that d phase queue length in most downstream intersection is influenced in each upstream intersection is determined；(4) extend the red time of each upstream intersection key signal phase respectively while extending the green time of intersection d phase of most downstream；(5) return step (1) repeats.Compared with prior art, the present invention more effectively prevents the Hui Yi between intersection and arterial highway sprawling.
Description
Technical field
The present invention relates to a kind of road traffic signal control methods, more particularly, to continuous under a kind of supersaturated traffic behavior
The signal coordinating control method of intersection.
Background technique
With the swift and violent growth of automobile, road grid traffic pressure is increasing, since urban road construction can not keep up with vehicle
The speed of development, the road network area that can be built is fewer and fewer, and automobile occupancy volume is in sustainable growth, the city in the whole nation about 2/3
City's traffic congestion becomes normality, and compartmentalization, normalization feature especially is presented in megalopolis traffic congestion, causes road grid traffic
Large area paralysis.Traffic congestion not only restricts the development in city but also will cause atmosphere pollution and gets worse, with sustainable development
Exhibition theory runs in the opposite direction.
Transportation supplies and the serious unbalance of transport need are the basic reasons for causing traffic congestion, so solving traffic congestion
Set about from two angles nothing but, first angle be it is slow stifled from the level for increasing supply, second angle is from demaning reduction
Level solves the problems, such as.However, China came into a very quick urbanization stage since 1986, we
City is made based on the consumption of a large amount of soil, and it is by means of transportation that nowadays some metropolitan soils, which have had 1/3,
It occupies, city continues to remove to solve traffic problems with this mode for continually developing new route to be infeasible.Urban Planner
Many measures, such as restricting the number trip, congestion-pricing, guidance trip mode are also made in the level of demand for control in recent years
Deng.But since these measure degrees of recognition are low, executory effect is low, slow stifled effect is not obvious.
In conclusion traffic signal optimization as a management means in traffic administration and control, equally also has control
The effect of transport need processed, and compared to having the characteristics that executory effect is strong, feasibility is high for other management measures, it is to mention
The most effective approach of road network operational efficiency under high hypersaturated state is the current important means for solving traffic congestion.Therefore, it studies
How to improve signal coordinating control method makes it obtain optimal benefit under supersaturated traffic behavior, is current urgent need to resolve
Problem.
For the signaling plan design under supersaturated traffic behavior, queue length is that there is conclusive parameter to refer to
Mark, because the queuing vehicle in downstream can not empty in green time under hypersaturated state, being detained vehicle can gradually increase at any time
It is more.In order to avoid queuing vehicle spreads to upstream intersection, intersection deadlock situation is caused, it is accurate to calculate queue length as tune
Save the key of upstream intersection signal scheme.And conventional traffic flow model mostly just sail out of theory and build by the arrival-based on vehicle
Vertical, vehicle flow fluctuating is not accounted for, is runed counter to vehicle practical operation situation.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of supersaturated traffic shapes
The signal coordinating control method of continuous intersection under state.
The purpose of the present invention can be achieved through the following technical solutions：
The signal coordinating control method of continuous intersection under a kind of supersaturation traffic behavior, this method comprises the following steps：
(1) queue length for monitoring each each phase in intersection in real time determines that congestion occurs most lower when getting congestion
Swim intersection；
(2) judge the queue length Q of any one phase of most downstream intersection d phase in current perioddWhether row is reached
Team leader's degree upper limit value Qd_max, if so, next period is by the Green extension Δ G of the intersection d phase of most downstreamdAnd it executes
Step (3) otherwise completes regulation；
(3) key signal phase that d phase queue length in most downstream intersection is influenced in each upstream intersection is determined；
(4) extend each upstream intersection key respectively while extending the green time of intersection d phase of most downstream
The red time of phase；
(5) return step (1) repeats.
Q in step (2)d_maxIt obtains in the following way：
Wherein, GdFor the green time of most downstream intersection d phase, s is that vehicle launch loses time, htFor average headstock
When away from kjFor jam density, L is entrance driveway length, and D is detector at a distance from stop line.
Δ G in step (2)dIt obtains in the following way：
ΔGd=(Qd-Qd_max)kjht,
htFor average headway, kjFor jam density.
Step (3) is specially：
(31) it for i-th of upstream intersection, determines and passes through from i-th of upstream intersection any one phase x phase, and
The flow for reaching most downstream intersection d phase accounts for the ratio τ of most downstream intersection d phase flowixjd, j expression most downstream intersects
Mouthful；
(32) by τixjdPhase corresponding to value maximum is determined as the key signal phase of i-th of upstream intersection.
The red light of each upstream intersection key signal phase of step (4) extends：For i-th of upstream intersection, i-th
Upstream intersection key signal phase red light extends time Δ RigFor：
ΔRig=Qdkjhtτigjd,
Wherein, htFor average headway, kjFor jam density, τigjdTo be passed through from the key signal phase of i-th of upstream intersection
The flow crossed, and reach most downstream intersection d phase accounts for the ratio of most downstream intersection d phase flow, and j indicates that most downstream intersects
Mouthful.
Red time upper limit value is also considered when extending the red time of each upstream intersection key signal phase in step (4), into
And the red time of each upstream intersection key signal phase is updated to：
Wherein, RigFor i-th of upstream intersection key signal phase red time updated value, R'igFor i-th of upstream intersection
Key signal phase red time original value, Δ RigExtend the time for i-th of upstream intersection key signal phase red light, Rig_maxIt is i-th
Upstream intersection key signal phase red time upper limit value.
Compared with prior art, the invention has the advantages that：
(1) present invention with " step by step disperse " for core concept, by the real time monitoring to queue length, according to queue length
Threshold value judges to adjust the signaling plan of upstream and downstream, it is ensured that the operational efficiency of continuous intersection mainly realizes following target：Root
The judgement of queue length and queue length threshold value when factually, it is continuous to hand over after being adjusted to the signal duration of upstream and downstream intersection
Do not occur being lined up the case where wagon flow can not dissipate between prong, the average speed that vehicle passes through continuous several intersections is mentioned
Height, traffic total delay are reduced；
(2) present invention not only needs to calculate the incidence coefficient of Adjacent Intersections when upstream intersection is adjusted, and
And the incidence coefficient of upstream each intersection and downstream intersection is calculated, this needs to obtain the routing information of driver, utilizes
The traffic of intersection turns to weighted value one by one, determines the incidence coefficient of upstream intersection and downstream intersection, is lined up length with control
Degree prevents from being lined up spilling being optimization aim, according to the core concept of " dispersing step by step ", on the one hand increases the discrete efficiency of entrance driveway,
On the other hand control upstream vehicle drives into efficiency, proposes a kind of signal coordinating control of continuous intersection under supersaturated traffic behavior
Method processed, and provide method and apply the technology path on intelligent traffic signal controller, the results showed that the method for the present invention is effective
Ground improves the operational efficiency of arterial traffic, greatly reduces vehicle delay.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for the present invention.
Fig. 2 is signal timing plan evaluation index comparison diagram in the embodiment of the present invention.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.Note that the following embodiments and the accompanying drawings is said
Bright is substantial illustration, and the present invention is not intended to be applicable in it object or its purposes is defined, and the present invention does not limit
In the following embodiments and the accompanying drawings.
Embodiment
As shown in Figure 1, under a kind of supersaturation traffic behavior continuous intersection signal coordinating control method, firstly, according to
The Optimal Signals scheme that intersection is calculated in traditional Robert Webster method is the original signaling plan of this method.It gathers around in order to prevent
It is stifled, the signal coordinating control method of continuous intersection under supersaturated traffic behavior is devised, this method comprises the following steps：
(1) queue length for monitoring each each phase in intersection in real time determines that congestion occurs most lower when getting congestion
Swim intersection；
(2) judge the queue length Q of any one phase of most downstream intersection d phase in current perioddWhether row is reached
Team leader's degree upper limit value Qd_max, if so, next period is by the Green extension Δ G of the intersection d phase of most downstreamdAnd it executes
Step (3) otherwise completes regulation；
(3) key signal phase that d phase queue length in most downstream intersection is influenced in each upstream intersection is determined；
(4) extend each upstream intersection key respectively while extending the green time of intersection d phase of most downstream
The red time of phase；
(5) return step (1) repeats.
Q in step (2)d_maxIt obtains in the following way：
Wherein, GdFor the green time of most downstream intersection d phase, s is that vehicle launch loses time, htFor average headstock
When away from kjFor jam density, L is entrance driveway length, and D is detector at a distance from stop line.
Δ G in step (2)dIt obtains in the following way：
ΔGd=(Qd-Qd_max)kjht,
htFor average headway, kjFor jam density.
Step (3) is specially：
(31) it for i-th of upstream intersection, determines and passes through from i-th of upstream intersection any one phase x phase, and
The flow for reaching most downstream intersection d phase accounts for the ratio τ of most downstream intersection d phase flowixjd, j expression most downstream intersects
Mouthful；
(32) by τixjdPhase corresponding to value maximum is determined as the key signal phase of i-th of upstream intersection.
Due to transport information, the intelligent mainstream tool for becoming traffic control and management, electricity has been installed in most of intersection
Sub- police's capturing system, therefore the walking path of available vehicle.The present invention will be according to the path data of vehicle and traffic
Data are measured, the upstream intersection dependent phase for needing most adjustment is determined according to weighted value, and calculate upstream intersections at different levels under
The incidence coefficient of congestion intersection is swum, provides data supporting for the adjustment of next step stream signal.
The present invention using most downstream intersection left turn phase as congestion phase for illustrate how using Impersonal-weight Parameter Theory determine
The highest upstream intersection phase of the degree of association, it is assumed that a certain upstream left turn phase drives into vehicle flowrate QL, wherein it is left to enter most downstream
The vehicle flowrate of phase inversion position is QLL, upstream intersection straight trip phase drive into vehicle flowrate QT, wherein entering most downstream left turn phase wagon flow
Amount is QTL, upstream right-hand rotation phase drives into vehicle flowrate QR, wherein entering most downstream left turn phase vehicle flowrate is QRL, therefore for most lower
Swimming intersection left turn phase flow is：Q=QLL+QTL+QRL.In order to assess each phase wagon flow in upstream to downstream left turn phase wagon flow
They are formed one group of weighted value { Q by effectLL/ Q, QTL/ Q, QRL/Q}.So if downstream intersection left turn phase is arranged
Team leader's degree is more than setting value, passes through max { QLL/ Q, QTL/ Q, QRL/ Q } it can determine most the phase for needing to be regulated and controled.
The red light of each upstream intersection key signal phase of step (4) extends：For i-th of upstream intersection, i-th
Upstream intersection key signal phase red light extends time Δ RigFor：
ΔRig=Qdkjhtτigjd,
Wherein, htFor average headway, kjFor jam density, τigjdTo be passed through from the key signal phase of i-th of upstream intersection
The flow crossed, and reach most downstream intersection d phase accounts for the ratio of most downstream intersection d phase flow, and j indicates that most downstream intersects
Mouthful.
For the signal coordinated control of continuous intersection, not only need to calculate the incidence coefficient of Adjacent Intersections, Er Qieyao
The incidence coefficient of upstream each intersection and downstream intersection is calculated, this needs to obtain the routing information of driver, using one by one
The traffic of intersection turns to weighted value, determines the incidence coefficient of upstream intersection and downstream intersection.The path letter needed exist for
Breath is the historical data of road network main line with the volume of traffic, and the adjustment for realizing source is gone from the angle in path.
Red time upper limit value is also considered when extending the red time of each upstream intersection key signal phase in step (4), into
And the red time of each upstream intersection key signal phase is updated to：
Wherein, RigFor i-th of upstream intersection key signal phase red time updated value, R'igFor i-th of upstream intersection
Key signal phase red time original value, Δ RigExtend the time for i-th of upstream intersection key signal phase red light, Rig_maxIt is i-th
Upstream intersection key signal phase red time upper limit value.
Above method main points are as follows：
1. the queue length of downstream intersection prevents downstream intersection from occurring being lined up Hui Yixian as important adjustment foundation
As influencing traffic circulation, the purpose is to realize vehicle drive into-to be driven out to balance；
2. coordinated control is based on former Optimal Signals scheme, when queue length reaches queue length upper limit value, extend
Downstream intersection coordinates the green time of phase, and according to the incidence coefficient of upstream intersection each phase and downstream intersection, by
Grade extends the red time of the key signal phase of each intersection in upstream, to achieve the purpose that slow stifled.
In order to verify arterial traffic signal coordinated control model under supersaturated traffic behavior established by the present invention, utilize
VISSIM establishes experiment road network.Intersection there are three testing on road network main line, be positive cross junction.From left to right compile respectively
Number intersection 1,2,3, the spacing between Adjacent Intersections is 500 meters, and east-west direction is road grid traffic Trunk Road Coordination direction.Into
Mouth road is equal, and without lane is widened, entrance driveway and section width are 3.5 meters, and section speed limit is 50,000 ms/h, and intersection 3 and friendship
The case where section between prong 2 has branch to interfere wagon flow, the branch interference that arterial traffic is subject to when simulating traffic congestion.
Three timing controlled, induction control, signal coordinated control of the present invention schemes are emulated respectively, timing controlled is
Refer to and is run according to the signal timing plan that traditional Robert Webster method obtains；Induction control refers to that only feedback is carried out in intersection 3
Control decides whether the green time for extending intersection 3 according to the feedback of 3 queue length of intersection；Coordinated control is this hair
Continuous intersection Coordinated Control Scheme under the hypersaturated state of bright proposition, not only feedback control, but also upstream are carried out in intersection 3
Corresponding green time is reduced in intersections at different levels, and traffic flow is decomposed to upstream intersection step by step.
Vehicle total delay, vehicle total run time, average speed and average stop frequency are had chosen as signal controlling party
Case evaluation index, detailed comparisons are as shown in Figure 2.It can be clearly seen that the effect of coordinated control will be substantially better than timing controlled
It is controlled with induction.It can be seen that the vehicle total delay of coordinated control is compared to timing controlled and induction control difference from Fig. 2 (a)
Reduce 14% and 10%；From Fig. 2 (b) it can be seen that the vehicle total delay of coordinated control is compared to timing controlled and induction control
Reduce 10% and 7% respectively, shows that control method for coordinating proposed in this paper effectively reduces the vehicle delay time at stop, show to adopt
Take coordinated control that can effectively cope with the situation that the factors such as branch interference increase journey time；From Fig. 2 (c) it can be seen that coordinating
The average speed of control improves 7% and 6% compared to timing controlled and induction control respectively, shows that context of methods improves friendship
The passage speed of logical main line, so that vehicle delay reduces；From Fig. 2 (d) it can be seen that the average stop frequency of coordinated control is compared
38% and 43% is reduced respectively in timing controlled and induction control, because control method for coordinating decomposes traffic pressure step by step
Trip, reduces the influence degree for being detained queuing vehicle when vehicle passes through intersection by downstream, and the simulation experiment result shows to coordinate
Control improves the operational efficiency of the main line of communication, effectively prevents the generation of traffic congestion.
The present invention can apply on intelligent traffic signal controller, form closed loop control using video detector and semaphore
System processed is edited signal coordinated control model algorithm of the invention using C#, establishes corresponding database, flat using intelligent transportation
Signal controlling machine is stored locally in the case where road surface reaction, and each detector is collected real-time road network information and is input to by platform
It in model algorithm, and is written in intelligence control system in real time by interface, realizes dynamic optimization.Adaptive control algorithm is run,
The intelligent level for improving system achieves good control effect.
Above embodiment is only to enumerate, and does not indicate limiting the scope of the invention.These embodiments can also be with other
Various modes are implemented, and can make in the range of not departing from technical thought of the invention it is various omit, displacement, change.
Claims (6)
1. the signal coordinating control method of continuous intersection under a kind of supersaturation traffic behavior, which is characterized in that this method includes
Following steps：
(1) queue length for monitoring each each phase in intersection in real time determines that the most downstream that congestion occurs is handed over when getting congestion
Prong；
(2) judge the queue length Q of any one phase of most downstream intersection d phase in current perioddWhether queue length is reached
Upper limit value Qd_max, if so, next period is by the Green extension Δ G of the intersection d phase of most downstreamdAnd execute step
(3), regulation is otherwise completed；
(3) key signal phase that d phase queue length in most downstream intersection is influenced in each upstream intersection is determined；
(4) extend each upstream intersection key signal phase respectively while extending the green time of intersection d phase of most downstream
Red time；
(5) return step (1) repeats.
2. the signal coordinating control method of continuous intersection under a kind of supersaturated traffic behavior according to claim 1,
It is characterized in that, Q in step (2)d_maxIt obtains in the following way：
Wherein, GdFor the green time of most downstream intersection d phase, s is that vehicle launch loses time, htFor average headway,
kjFor jam density, L is entrance driveway length, and D is detector at a distance from stop line.
3. the signal coordinating control method of continuous intersection under a kind of supersaturated traffic behavior according to claim 1,
It is characterized in that, Δ G in step (2)dIt obtains in the following way：
ΔGd=(Qd-Qd_max)kjht,
htFor average headway, kjFor jam density.
4. the signal coordinating control method of continuous intersection under a kind of supersaturated traffic behavior according to claim 1,
It is characterized in that, step (3) is specially：
(31) it for i-th of upstream intersection, determines and passes through from i-th of upstream intersection any one phase x phase, and reach
The flow of most downstream intersection d phase accounts for the ratio τ of most downstream intersection d phase flowixjd, j expression most downstream intersection；
(32) by τixjdPhase corresponding to value maximum is determined as the key signal phase of i-th of upstream intersection.
5. the signal coordinating control method of continuous intersection under a kind of supersaturated traffic behavior according to claim 1,
It is characterized in that, the red light extension of each upstream intersection key signal phase of step (4) is specially：For i-th of upstream intersection, i-th
A upstream intersection key signal phase red light extends time Δ RigFor：
ΔRig=Qdkjhtτigjd,
Wherein, htFor average headway, kjFor jam density, τigjdTo pass through from the key signal phase of i-th of upstream intersection,
And the flow for reaching most downstream intersection d phase accounts for the ratio of most downstream intersection d phase flow, j indicates most downstream intersection.
6. the signal coordinating control method of continuous intersection under a kind of supersaturated traffic behavior according to claim 5,
It is characterized in that, also considers red time upper limit value when extending the red time of each upstream intersection key signal phase in step (4), into
And the red time of each upstream intersection key signal phase is updated to：
Wherein, RigFor i-th of upstream intersection key signal phase red time updated value, Ri'gFor i-th of upstream intersection key phase
Position red time original value, Δ RigExtend the time for i-th of upstream intersection key signal phase red light, Rig_maxIt is handed over for i-th of upstream
Prong key signal phase red time upper limit value.
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| CN109544945B (en) * | 2018-11-30 | 2021-06-01 | 江苏智通交通科技有限公司 | Regional control phase timing optimization method based on lane saturation |
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| CN110706482A (en) * | 2019-08-30 | 2020-01-17 | 安锐 | Peak traffic passing control method and device |
| CN110599782B (en) * | 2019-11-07 | 2021-06-11 | 山西省地震局 | Method for controlling duration of traffic lights according to population distribution thermodynamic diagrams |
| CN110599782A (en) * | 2019-11-07 | 2019-12-20 | 山西省地震局 | Method for controlling duration of traffic lights according to population distribution thermodynamic diagrams |
| CN112037507A (en) * | 2020-08-10 | 2020-12-04 | 东南大学 | Supersaturated traffic state trunk line adaptive signal coordination design method and device |
| CN113936480A (en) * | 2021-11-11 | 2022-01-14 | 青岛海信网络科技股份有限公司 | Traffic signal control method and equipment |
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| CN114155724A (en) * | 2021-12-23 | 2022-03-08 | 连云港杰瑞电子有限公司 | Intersection traffic signal control method under Internet of vehicles environment |
| CN114613136A (en) * | 2022-03-06 | 2022-06-10 | 南京理工大学 | Supersaturation key intersection group coordination control method and system based on associated path |
| CN116110238A (en) * | 2023-04-10 | 2023-05-12 | 南昌金科交通科技股份有限公司 | Dynamic control method and system for traffic light |
| CN116229738A (en) * | 2023-05-09 | 2023-06-06 | 安徽星云互联科技有限责任公司 | Intelligent networking region coordination control method, device and equipment based on vehicle-road coordination |
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