CN102637364B - Adaptive signal method capable of avoiding deadlock of intersection and device - Google Patents
Adaptive signal method capable of avoiding deadlock of intersection and device Download PDFInfo
- Publication number
- CN102637364B CN102637364B CN201210012259.9A CN201210012259A CN102637364B CN 102637364 B CN102637364 B CN 102637364B CN 201210012259 A CN201210012259 A CN 201210012259A CN 102637364 B CN102637364 B CN 102637364B
- Authority
- CN
- China
- Prior art keywords
- section
- intersection
- phase place
- signal
- wagon flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention provides an adaptive signal method capable of avoiding deadlock of an intersection and a device, which relate to the field of intelligent traffic. The method includes acquiring the number of vehicles at the intersection and the vehicle speed of an exit section in a current traffic direction; and switching the phase of an intersection signal into the phase of a temporary signal when the number of the vehicles at the intersection is larger than a threshold value and the vehicle speed of the exit section is lower than a threshold value. The phase of the temporary signal includes prohibiting vehicles in the current traffic direction from running into the intersection and prohibiting traffic in a vehicle flow direction conflicting with the current traffic direction. Whether the phase of the temporary signal needs to be switched in or not is determined by means of judging the number of the vehicles at the intersection and the vehicle speed of the exit section corresponding to the traffic signal, the traffic in the vehicle flow direction conflicting with the current traffic direction is prohibited within the phase of the temporary signal, accumulation of the vehicles at the intersection is avoided, deadlock of the intersection is stopped, traffic efficiency of the intersection is improved, urban traffic jam is relieved, and traffic accident rate is reduced.
Description
Technical field
The application relates to intelligent transportation field, particularly relates to a kind of self-adapting signal method and apparatus of avoiding intersection deadlock.
Background technology
Urban road grade crossing causes wagon flow to interrupt owing to being subject to signal lamp control, and the traffic capacity will be lower than the traffic capacity in section, is the Main Bottleneck of urban transportation.Formulating effective traffic signal control strategy is the important means that ensures the traffic safety of intersection and give full play to the traffic efficiency of intersection.Along with the continuous perfect of traffic detection technique and the deep understanding to traffic flow moving law, Characteristics for Single Staggered intersection signal control has experienced the development course that is controlled to adaptive control by timing controlled, induction, adapted to traffic signals by Passive Control the demand to ACTIVE CONTROL developing direction, progressively by simple type to intelligent excessively, improved the control benefit of intersection.
Along with the explosive growth of transport need, city traffic is substantially in hypersaturated state.Now, section density is large, and flow is low.On section, block up cause vehicle queue very easily extend to intersection, after signal lamp phase transition, in intersection, vehicle does not also have emptyingly, and other steering vehicles flow to into intersection and but can not pass through smoothly, cause in intersection vehicle cumulative, deadlock finally occurs.Although while clearly getting congestion in regulation intersection in traffic law, vehicle No entry intersection, this regular subjective factor is strong, and generally, as long as signal lamp is green light, vehicle just enters intersection.
In morning and evening peak period, Beijing, often can there is deadlock situation.Under deadlock state, the flow of intersection is 0, causes local traffic paralysis, seriously reduces the traffic efficiency of whole road network.Once and deadlock occurs, must manual intervention could remove, lasting time of deadlock is longer, the traffic congestion causing is more serious.The signal control method of intersection deadlock is avoided in formulation, is to improve intersection capacity under hypersaturated state, the important measures that improve the operational efficiency of road network.
Existing intersection signal control method generally adopts timing signal method of adjustment, in magnitude of traffic flow rush hour, as long as signal lamp is green light, vehicle also all can unconfinedly enter intersection, causes existing method can not effectively avoid the generation of deadlock state.
Summary of the invention
Technical problems to be solved in this application are to provide a kind of self-adapting signal method and apparatus of avoiding intersection deadlock, avoid vehicle to accumulate in intersection, thereby stop the generation of intersection deadlock, improve intersection passing efficiency, alleviate urban traffic blocking, and reduce traffic hazard incidence.
In order to address the above problem, the application discloses a kind of Adaptive Signal Control method of avoiding intersection deadlock, comprising:
Obtain intersection vehicle number and the speed of a motor vehicle of rolling section away from current current direction; Wherein, described intersection vehicle number is to sail into and vehicle number poor of rolling described intersection away from;
When described intersection vehicle number be greater than threshold value and described in roll section away from the speed of a motor vehicle while being less than threshold value, by intersection signal phase incision temporary signal phase place; Described temporary signal phase place comprises that the vehicle of forbidding current current direction sails intersection into and forbids that producing the wagon flow direction of conflicting with current current direction passes through;
In the time that described intersection is cross intersection, the concrete steps of described incision temporary signal comprise: if be now craspedodrome phase place, section, the upstream craspedodrome direction green light of section i becomes red light so, and the direction of keeping straight in the opposite direction green light is constant, and left-hand rotation direction red light becomes green light; If be now left turn phase, the left turn traffic signal lamp that enters so section i becomes red light from green light; Wherein, described section i is the section getting congestion; The original signal phase place of described cross intersection comprises east-west direction craspedodrome phase place, east-west direction left turn phase, North and South direction craspedodrome phase place and North and South direction left turn phase;
In the time that described intersection is T-junction crossing, the concrete steps of described incision temporary signal comprise: signal is in phase place I: if section i is s
3, so to section s
6craspedodrome wagon flow sends out a warning, to section s
4left turn traffic gives a green light; If section i is s
5, so to section s
4craspedodrome wagon flow sends out a warning; Signal is in phase place II: if section i is s
1, so to section s
4left turn traffic sends out a warning, to section s
4craspedodrome wagon flow gives a green light; Signal is in phase place III: if section i is s
5, so to section s
2left turn traffic sends out a warning, to section s
6craspedodrome wagon flow gives a green light; Wherein, described section i is the section getting congestion, and described phase place I, described phase place II and described phase place III are the original signal phase place at described T-junction crossing, and described phase place I is that main road wagon flow is kept straight on, described phase place II is that main road wagon flow is turned left, and described phase place III is that branch road wagon flow is turned left.
Preferably, described temporary signal phase place also comprises:
Allowing not produce the wagon flow direction of conflicting with current current direction passes through.
Preferably, when described intersection vehicle number be not more than threshold value and described in roll section away from the speed of a motor vehicle while being not less than threshold value, intersection signal phase is controlled by normal signal phase place.
Accordingly, the application discloses a kind of Adaptive Signal Control device of avoiding intersection deadlock, comprising:
Information of vehicles acquisition device, for obtaining intersection vehicle number and the speed of a motor vehicle of rolling section away from current current direction; Wherein, described intersection vehicle number is to sail into and vehicle number poor of rolling described intersection away from;
Sig-nal-conditioning unit, for be greater than when described intersection vehicle number threshold value and described in roll section away from the speed of a motor vehicle while being less than threshold value, by intersection signal phase incision temporary signal phase place; Described temporary signal phase place comprises that the vehicle of forbidding current current direction sails intersection into and forbids that producing the wagon flow direction of conflicting with current current direction passes through;
In the time that described intersection is cross intersection, the concrete steps of described incision temporary signal comprise: if be now craspedodrome phase place, section, the upstream craspedodrome direction green light of section i becomes red light so, and the direction of keeping straight in the opposite direction green light is constant, and left-hand rotation direction red light becomes green light; If be now left turn phase, the left turn traffic signal lamp that enters so section i becomes red light from green light; Wherein, described section i is the section getting congestion; The original signal phase place of described cross intersection comprises east-west direction craspedodrome phase place, east-west direction left turn phase, North and South direction craspedodrome phase place and North and South direction left turn phase;
In the time that described intersection is T-junction crossing, the concrete steps of described incision temporary signal comprise: signal is in phase place I: if section i is s
3, so to section s
6craspedodrome wagon flow sends out a warning, to section s
4left turn traffic gives a green light; If section i is s
5, so to section s
4craspedodrome wagon flow sends out a warning; Signal is in phase place II: if section i is s
1, so to section s
4left turn traffic sends out a warning, to section s
4craspedodrome wagon flow gives a green light; Signal is in phase place III: if section i is s
5, so to section s
2left turn traffic sends out a warning, to section s
6craspedodrome wagon flow gives a green light; Wherein, described section i is the section getting congestion, and described phase place I, described phase place II and described phase place III are the original signal phase place at described T-junction crossing, and described phase place I is that main road wagon flow is kept straight on, described phase place II is that main road wagon flow is turned left, and described phase place III is that branch road wagon flow is turned left.
Preferably, described temporary signal phase place also comprises:
Allowing not produce the wagon flow direction of conflicting with current current direction passes through.
Preferably, when described intersection vehicle number be not more than threshold value and described in roll section away from the speed of a motor vehicle while being not less than threshold value, intersection signal phase is controlled by prearranged signals phase place.
Preferably, described information of vehicles acquisition device comprises Loop Vehicle Detector; Described sig-nal-conditioning unit comprises teleseme.
Compared with prior art, the application comprises following advantage:
The application increases a temporary signal phase place on the basis of original phase place, the speed of a motor vehicle of rolling accordingly section by the judgement to vehicle number in intersection and right of way signal away from judges whether to enter this temporary signal phase place, in this temporary signal phase place, forbid that producing the wagon flow direction of conflicting with current current direction passes through, forbid that the vehicle that will enter generation crowded queuing section enters intersection, avoid vehicle to accumulate in intersection, thereby stop the generation of intersection deadlock, improve intersection passing efficiency, alleviate urban traffic blocking, and reduce traffic hazard incidence.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of a kind of self-adapting signal method of avoiding intersection deadlock of the application;
Fig. 2 is the preferred schematic flow sheet of self-adapting signal method that the application avoids intersection deadlock;
Fig. 3 a is the preferred cross junction Adaptive Signal Control of the application method schematic diagram;
Fig. 3 b is four phase places of the preferred cross junction timing signal of the application control method;
Timing controlled and adaptive control flow evolution diagram in time when Tu4Shi the application vehicle queue extends to cross junction;
Fig. 5 is the variation that the application's cross junction adopts signal lamp state while avoiding the self-adaptation control method of deadlock;
When Fig. 6 a is the control of employing timing signal, crossing flow and vehicle sail probability and the graph of a relation that rolls probability away from into;
When Fig. 6 b is employing the application institute extracting method, crossing flow and vehicle sail probability and the graph of a relation that rolls probability away from into;
Fig. 7 is the preferred T-junction mouth of the application Adaptive Signal Control method schematic diagram;
Fig. 8 is three phase places of the preferred T-junction mouth of the application timing signal control method;
Timing controlled and adaptive control flow evolution diagram in time when Tu9Shi the application vehicle queue extends to T-junction mouth;
Figure 10 is the variation that the application's T-junction mouth adopts signal lamp state while avoiding the self-adaptation control method of deadlock;
When Figure 11 a is the control of employing timing signal, crossing flow and vehicle sail probability and the graph of a relation that rolls probability away from into;
When Figure 11 b is employing the application institute extracting method, crossing flow and vehicle sail probability and the graph of a relation that rolls probability away from into.
Embodiment
For the above-mentioned purpose, the feature and advantage that make the application can become apparent more, below in conjunction with the drawings and specific embodiments, the application is described in further detail.
With reference to Fig. 1, show the schematic flow sheet of a kind of self-adapting signal method of avoiding intersection deadlock of the application, comprising:
Step 110, obtains intersection vehicle number and rolls accordingly the speed of a motor vehicle in section away from signal.
For the vehicle that enters intersection, can obtain by the difference that detects its car number that sails into and roll away from.Such as: the section of sailing in the vehicular circulation direction of intersection detects that the vehicle that sails intersection into is 50 cars, roll section away from and detect that the vehicle that rolls intersection away from is 42 cars, so, now also the vehicle number in intersection is 50-42=8 car.
For the speed of a motor vehicle of vehicle, the application need to obtain the speed of a motor vehicle of rolling section away from of current current direction.Whether this speed of a motor vehicle can judge rolls section away from normal current.
In practice, sailing section into and rolling section away from of each current direction arranges respectively an information of vehicles acquisition device, to obtain intersection vehicle number and the speed of a motor vehicle of rolling section away from current current direction.Such as by Loop Vehicle Detector, detect vehicle number and the speed of a motor vehicle of rolling section vehicle away from, and the magnetic test coil of Loop Vehicle Detector is more accurate ground to the statistics of vehicle number, therefore can have good effect.Certainly also can obtain intersection vehicle number and the speed of a motor vehicle of rolling section away from current current direction with other equipment.
Step 120, when described intersection vehicle number be greater than threshold value and described in roll section away from the speed of a motor vehicle while being less than threshold value, by intersection signal phase incision temporary signal phase place; Described temporary signal phase place comprises that the vehicle of forbidding current current direction sails intersection into and forbids that producing the wagon flow direction of conflicting with current current direction passes through.
In reality, for dissimilar intersection, different vehicle fleet size threshold values and the speed of a motor vehicle threshold value of rolling section away from can be set.Such as for certain right-angled intersection, the current section of its intersection is long, can must be larger by its threshold value setting, such as, if long 60 meters of the current section of certain intersection, can be according to the physical length of vehicle and vehicle, can be set in the vehicle threshold value of this intersection is 20.If long 30 meters of the current section of certain intersection, can be according to the physical length of vehicle and vehicle, can be set in the vehicle threshold value of this intersection is 10.This vehicle threshold value can obtain according to actual count.
Generally can be set to be less than 2m/s or less for the speed of a motor vehicle of rolling section away from.The deadlock reason of intersection is general because the velocity ratio that current direction is rolled section away from is lower, thereby cause cannot rolling away from time from sailing the vehicle sailing in section into, thereby cause vehicle in intersection to be piled up, be therefore traditionally arranged to be the low speed of 2m/s left and right for the speed of a motor vehicle of rolling section away from.
When described intersection, vehicle number is greater than threshold value, when the speed of a motor vehicle of rolling section described in simultaneously away from is less than threshold value, is indicating that intersection probably enters deadlock state, now records the phase place of current demand signal lamp; By intersection signal phase incision temporary signal phase place; Described temporary signal phase place comprises that the vehicle of forbidding current current direction sails intersection into and forbids that producing the wagon flow direction of conflicting with current current direction passes through.Described temporary signal phase place also comprises that allowing not produce the wagon flow direction of conflicting with current current direction passes through.So, for the current restriction that produces the vehicle conflicting with current current direction, can avoid making to produce with current current direction the vehicle conflicting because of the timing redirect green light of normal signal and enter intersection, thus produce of deadlock.Allow not produce the wagon flow direction of conflicting with current current direction simultaneously and pass through, can alleviate traffic burden.
In addition, when described intersection vehicle number be not more than threshold value and described in roll section away from the speed of a motor vehicle while being not less than threshold value, intersection signal phase is controlled by normal signal phase place.After being the alarm release of deadlock, temporary signal phase place can be removed, return to original signal phase and carry out magnitude of traffic flow control.
In practice can by teleseme according to the relation of described intersection vehicle number and threshold value and described in roll the speed of a motor vehicle in section away from and the relation of threshold value is controlled signal phase.
With reference to Fig. 2, it shows the schematic flow sheet of more specifically a kind of self-adapting signal method of avoiding intersection deadlock of the application.
Calculate vehicle number and the speed of a motor vehicle of rolling section away from crossing;
Judge whether deadlock will occur according to said method; If not, continue the speed of a motor vehicle calculating the vehicle number in crossing and roll section away from, the if it is current phase place of tracer signal lamp, cuts interim phase place;
Calculate vehicle number and the speed of a motor vehicle of rolling section away from crossing;
According to said method, judgement is to finish interim phase place; If not, continue to calculate the vehicle number and the speed of a motor vehicle of rolling section away from crossing; If so, finish interim phase place, cut the normal phase place of people.
With reference to Fig. 3 a, it shows the schematic diagram of the preferred right-angled intersection Adaptive Signal Control of the application method.Wherein, 1 represents Loop Vehicle Detector; 2 represent teleseme; 3 represent that signal lamp 4 represents crossing; 5 represent 4 sections of right-angled intersection; 6 represent intersection.
Right-angled intersection is connected with the section on four direction, sails respectively section into and roll section away from four direction.Four wagon flows of sailing on section are subject to signal lamp control.On the four direction being connected with right-angled intersection, respectively sail section into and roll away from section and all bury Data mining device underground, in order to obtain the flow and the speed information that enter and sail out of intersection.Sail section into for being positioned at upstream, intersection, sail the section of intersection for vehicle into; Roll section away from for being positioned at downstream, intersection, roll the section of intersection for vehicle away from.Detecting device is connected by optical cable with teleseme, transmits each link flow and speed information in real time to teleseme.Control module in teleseme is processed these information, obtain and sail intersection vehicle flowrate into and roll intersection vehicle flowrate away from, deduct and accumulate the vehicle flowrate that rolls intersection away from and obtain vehicle number in current intersection with the vehicle flowrate that intersection is sailed in accumulation into; Obtain and roll the section stream average velocity of getting on the bus away from, if speed is less than a certain critical value, the crowded queuing on this section has extended to intersection.Teleseme carries out anticipation according to the wagon flow state on each section to deadlock, changes signal lamp state.
In practice, when signal phase is during in normal four phase place, (be not more than a certain critical value N if vehicle number is in normal range in intersection
max), the speed of a motor vehicle of rolling section away from was obviously greater than for 0 (being generally more than or equal to 2m/s), and signal lamp converts according to fixing four phase places so;
If vehicle number too much (exceedes a certain critical value N in intersection
max), and roll non-intersection speed away from and approach 0 (being generally less than 2m/s), enter so temporary signal phase place, and determine the each signal lamp state of temporary signal phase place according to the section that enters temporary signal phase place front blinker state and crowded queuing occurs.
Wherein, signal lamp control principle is for becoming red light by current current directional signal light in advance, forbid that the vehicle that need to enter generation crowded queuing section enters intersection, another one is passed through constant to signal lamp state, and the wagon flow directional signal light that will not conflict becomes green light.When signal phase is during in interim phase place, if vehicle number reduces to below a certain critical value N* in intersection, finish so temporary signal phase place, enter into next timing signal control phase.Such as being green light in thing craspedodrome direction, when other directions are red light, detect that in intersection, vehicle number is greater than N
max, and east side rolls non-intersection speed away from close to 0, enters after interim phase place, and the west direction of keeping straight on eastwards becomes red light, and east orientation south left-hand rotation direction becomes green light; In the time detecting that in intersection, vehicle number is not more than N*, finish temporary signal phase place, the western craspedodrome direction of east orientation is red light, the west direction of northwards turning left becomes green light.
With reference to Fig. 3 b, it shows preferably original four phase places of right-angled intersection timing signal control method of the application.Phase place I is that east-west direction is kept straight on; Phase place II is that east-west direction turns left; Phase place III is that North and South direction is kept straight on; Phase place IV is that North and South direction is turned left.
The speed information control that teleseme rolls section away from according to vehicle number information and current direction in the intersection the obtaining section signal lamp state of queuing up that gets congestion, realize and enter into temporary signal phase place by normal signal phase place, and turned back to the conversion of normal signal phase place by temporary signal phase place.
Specific as follows: overflow to the section of intersection after detecting according to velocity information the queuing of blocking up (1).According to the sailing section into and roll detecting device on section away from and obtain the vehicle number that sails intersection into and roll intersection away from of intersection adjacency, deduct and roll intersection vehicle number away from and just obtain vehicle number N in current intersection with sailing intersection vehicle number into
c.If N
c>N
max(N
maxfor vehicle number threshold value), and detect that a certain non-intersection speed that rolls away from is close to 0 (being generally less than 2m/s), the queuing causing of blocking up is so overflow and has been extended to intersection afterwards.Record the speed of a motor vehicle and number close to 0 section, be designated as i, now, section i gets congestion, and need to limit upstream wagon flow and sail section i into.Here N
maxrepresent the maximum vehicle number that allows in intersection.
(2) enter temporary signal phase place, and determine each signal lamp state.If be now craspedodrome phase place, section, the upstream craspedodrome direction green light of section i becomes red light so, and the direction of keeping straight in the opposite direction green light is constant, and left-hand rotation direction red light becomes green light.If be now left turn phase, the left turn traffic signal lamp that enters so section i becomes red light from green light.Record intersection simultaneously and enter residing phase place before temporary signal phase place, so that temporary signal phase place directly enters into next phase place while finishing.
(3) in temporary signal phase place, signal lamp state transformation.If vehicle number N in intersection
c<N*, finishes temporary signal phase place so, and enters into next phase place.Here critical vehicle number when N* represents to finish temporary signal phase place in intersection, and meet N*<N
max.If N
c>N*, continues temporary signal phase state, obtains and respectively rolls section car speed away from, if the speed of a motor vehicle approached for 0 (being less than 2m/s), illustrates that this section gets congestion, and the signal lamp that enters this upstream, section wagon flow is set to red light.
In addition, if intersection exceedes 1 minute in the time of temporary signal phase place, from trend traffic control center transmitted signal, traffic control center sends to this information patrol traffic police in time, directs traffic so that traffic police arrives in rapidly corresponding intersection.
For the validity of the signal control strategy of avoiding crossing deadlock that proposes of checking, the Single Intersection shown in Fig. 2 is carried out to analogue simulation, setting four of being connected with crossing, to sail section rate of inflow into be α, unit/second; The rate of outflow that rolls section away from right side, crossing is β
1, other roll section rate of outflow away from is β, unit/second.Left turning vehicle ratio 0.2 on each section, right-hand rotation vehicle ratio 0.2, through vehicles ratio 0.6.120 seconds signal periods, craspedodrome long green light time 40 seconds, left-hand rotation long green light time 20 seconds.
With reference to Fig. 4, be the application vehicle queue timing controlled and adaptive control flow evolution diagram in time while extending to cross junction.Get α=0.5, β
1=0.05, β=1.0.The figure illustrates the fluctuations in discharge of crossing per minute under two kinds of different signal control strategy conditions.Can find, while adopting timing signal control, flow is finally reduced to 0.In initial a few minutes, block up and do not extend to crossing, flow is unaffected; After t=6 minute, flow starts to reduce; In the time of t>14 minute, flow is reduced to 0, and deadlock has occurred in crossing.
With reference to Fig. 5, the variation diagram of signal lamp state when it shows the preferred right-angled intersection of the application and adopts the self-adaptation control method of avoiding deadlock.
The figure illustrates the situation of change that adopts each travel direction signal lamp state while avoiding crossing deadlock signal timing plan.Within two initial cycles, block up and also do not extend to crossing, signal lamp state changes according to timing controlled scheme.In the time of t=356 second, the west signal lamp of keeping straight on eastwards becomes red light from green light, and east orientation south left rotaring signal lamp becomes green light from red light.The west green time of keeping straight on is eastwards very short, and the western green time of east orientation and east orientation south green time are elongated.
With reference to Fig. 6 a and Fig. 6 b, it shows the application's right-angled intersection flow and vehicle sails probability and the relation of rolling probability away from into.
The figure illustrates the relation that crossing flow and vehicle sail probability α into and roll probability β away from.Now fixing section, right side, crossing, to roll probability away from be 0.05.Be less than while rolling probability away from when sailing probability into, do not form the section bottleneck that blocks up, crossing flow is with sailing the increase of flow into and linear growth, the subsequently value of reaching capacity.Along with rolling the increase of probability away from, the value of saturation volume also increases.While adopting timing signal control, roll the generation that probability hour can cause deadlock away from, crossing flow is 0.When deadlock signal controlling is avoided in employing, roll probability away from when very little, crossing also can keep certain flow.By relatively finding, rolling probability away from hour, when namely section gets congestion, avoid deadlock signal controlling can obtain larger flow; Rolling probability away from when larger, section can not get congestion, and the flow that two kinds of signal timing plans obtain does not have difference.As can be seen from the above results, the Adaptive Signal Control method of avoiding crossing deadlock proposing can effectively be avoided the generation of crossing deadlock, improves the traffic efficiency of crossing under hypersaturated state.
With reference to Fig. 7, it shows the schematic diagram of the preferred T-shaped crossing of the application Adaptive Signal Control method.Represented same Fig. 2 of implication of numeral in figure.T-shaped crossing is connected branch road with main road, on each section track arrange inconsistent, in Fig. 7 with letter with combination of numbers in order to distinguish.S
1represent that branch road rolls section away from; s
2represent that branch road sails section into; s
3and s
5represent to roll section away from main road; s
4represent to have on main road the section of sailing into of left turn lane; s
6represent not have on main road the section of sailing into of left turn lane.
T-junction crossing connects main road and bypass, has three to sail section and three into and roll section away from, and three are sailed into section wagon flow and are subject to signal controlling.Sail section into for two on main road and have asymmetry, one has left turn lane, and another does not have left turn lane.Similar with cross junction, respectively sailing section into and rolling away from section and all bury Data mining device underground, in order to obtain the flow and the speed information that enter and sail out of intersection.The same cross junction of connection of detecting device, teleseme and other devices.To the anticipation rule of crossing deadlock, it is consistent with cross junction that signal etc. are controlled principle, just in the concrete transformation rule of signal lamp and control method, there are differences.
With reference to Fig. 8, it shows preferably original three phase places of T-junction crossing timing signal control method of the application.Phase place I is that main road wagon flow is kept straight on; Phase place II is that main road wagon flow is turned left; Phase place III is that branch road wagon flow is turned left.
T-junction cause for gossip is existing enters into temporary signal phase place by normal signal phase place, and it is specific as follows to turn back to the transformation rule of normal signal phase place by temporary signal phase place:
(1) according to velocity information detect block up queue up after overflow to the section of intersection.According to the sailing section into and roll detecting device on section away from and obtain the vehicle number that sails intersection into and roll intersection away from of intersection adjacency, deduct and roll intersection vehicle number away from and just obtain vehicle number N in current intersection with sailing intersection vehicle number into
c.If N
c>N
max(N
maxfor vehicle number threshold value), and detect that a certain non-intersection speed that rolls away from is close to 0 (being generally less than 2m/s), the queuing causing of blocking up is so overflow and has been extended to intersection afterwards.Record the speed of a motor vehicle and number close to 0 section, be designated as i, now, section i gets congestion, and need to limit upstream wagon flow and sail section i into.Here N
maxrepresent the maximum vehicle number that allows in intersection.
(2) enter temporary signal phase place, and determine each signal lamp state.Signal is in phase place I: if section i is s
3, so to section s
6craspedodrome wagon flow sends out a warning, to section s
4left turn traffic gives a green light; If section i is s
5, so to section s
4craspedodrome wagon flow sends out a warning.Signal is in phase place II: if section i is s
1, so to section s
4left turn traffic sends out a warning, to section s
4craspedodrome wagon flow gives a green light.Signal is in phase place III: if section i is s
5, so to section s
2left turn traffic sends out a warning, to section s
6craspedodrome wagon flow gives a green light.
(3) in temporary signal phase place, signal lamp state transformation.If vehicle number N in intersection
c<N*, finishes temporary signal phase place so, and enters into next phase place.Here critical vehicle number when N* represents to finish temporary signal phase place in intersection, and meet N*<N
max.If N
c>N*, continues temporary signal phase state, obtains and respectively rolls section car speed away from, if the speed of a motor vehicle approached for 0 (being less than 2m/s), illustrates that this section gets congestion, and the signal lamp that enters this upstream, section wagon flow is set to red light.
By analogue simulation, can obtain being similar to the result of cross junction, the signal control method of avoiding crossing deadlock proposing is equally applicable to T-junction mouth.Setting main road rate of inflow is α, and branch road rate of inflow is α/2; It is β that section rate of outflow is rolled on right side, crossing away from
1, other roll section rate of outflow away from is β.Main road left turn traffic ratio 0.3, right-hand rotation wagon flow ratio 0.3, branch road left turn traffic ratio 0.6, right-hand rotation wagon flow ratio 0.4.120 seconds signal periods, main road craspedodrome long green light time 60 seconds, main road left-hand rotation long green light time 30 seconds, branch road left-hand rotation long green light time 30 seconds.
With reference to Fig. 9, be the application vehicle queue timing controlled and adaptive control flow evolution diagram in time while extending to T-junction mouth.Get α=0.5, β
1=0.05, β=1.0.The figure illustrates the fluctuations in discharge of crossing per minute under two kinds of different signal control strategy conditions.Can find the flow of flow when Adaptive Signal Control during apparently higher than timing signal control.
With reference to Figure 10, it shows the preferred T-junction of the application crossing and adopts the variation diagram of signal lamp state while avoiding the self-adaptation control method of deadlock.
The figure illustrates the situation of change that adopts each travel direction signal lamp state while avoiding crossing deadlock signal timing plan.Within two initial cycles, block up and also do not extend to crossing, signal lamp state changes according to timing controlled scheme.In the time of t=252 second, the west signal lamp of keeping straight on eastwards becomes red light from green light, and east orientation south left rotaring signal lamp becomes green light from red light.
With reference to Figure 11 a and Figure 11 b, it shows the application's T-junction crossing flow and vehicle sails probability and the relation of rolling probability away from into.The figure illustrates the relation that crossing flow and vehicle sail probability α into and roll probability β away from.Now fixing section, right side, crossing, to roll probability away from be 0.05.Be less than while rolling probability away from when sailing probability into, do not form the section bottleneck that blocks up, crossing flow is with sailing the increase of flow into and linear growth, the subsequently value of reaching capacity.Along with rolling the increase of probability away from, the value of saturation volume also increases.By relatively finding, rolling probability away from hour, when namely section gets congestion, avoid deadlock signal controlling can obtain larger flow; Rolling probability away from when larger, section can not get congestion, and the flow that two kinds of signal timing plans obtain does not have difference.
Disclosed herein as well is accordingly a kind of Adaptive Signal Control device of avoiding intersection deadlock, comprising:
Information of vehicles acquisition device, for obtaining intersection vehicle number and the speed of a motor vehicle of rolling section away from current current direction;
Sig-nal-conditioning unit, for be greater than when described intersection vehicle number threshold value and described in roll section away from the speed of a motor vehicle while being less than threshold value, by intersection signal phase incision temporary signal phase place; Described temporary signal phase place comprises that the vehicle of forbidding current current direction sails intersection into and forbids that producing the wagon flow direction of conflicting with current current direction passes through.
Described temporary signal phase place also comprises: allow not produce the wagon flow direction of conflicting with current current direction and pass through.When described intersection vehicle number be not more than threshold value and described in roll section away from the speed of a motor vehicle while being not less than threshold value, intersection signal phase is controlled by prearranged signals phase place.Described intersection comprises T-shaped crossing and crossroad.
Described information of vehicles acquisition device comprises Loop Vehicle Detector; Described sig-nal-conditioning unit comprises teleseme.
For system embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
A kind of self-adapting signal method and apparatus of avoiding intersection deadlock above the application being provided, be described in detail, applied principle and the embodiment of specific case to the application herein and set forth, the explanation of above embodiment is just for helping to understand the application's method and core concept thereof; , for one of ordinary skill in the art, according to the application's thought, all will change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application meanwhile.
Claims (7)
1. an Adaptive Signal Control method of avoiding intersection deadlock, is characterized in that, comprising:
Obtain intersection vehicle number and the speed of a motor vehicle of rolling section away from current current direction; Wherein, described intersection vehicle number is to sail into and vehicle number poor of rolling described intersection away from;
When described intersection vehicle number be greater than threshold value and described in roll section away from the speed of a motor vehicle while being less than threshold value, by intersection signal phase incision temporary signal phase place; Described temporary signal phase place comprises that the vehicle of forbidding current current direction sails intersection into and forbids that producing the wagon flow direction of conflicting with current current direction passes through;
In the time that described intersection is cross intersection, the concrete steps of described incision temporary signal comprise: if be now craspedodrome phase place, section, the upstream craspedodrome direction green light of section i becomes red light so, and the direction of keeping straight in the opposite direction green light is constant, and left-hand rotation direction red light becomes green light; If be now left turn phase, the left turn traffic signal lamp that enters so section i becomes red light from green light; Wherein, described section i is the section getting congestion; The original signal phase place of described cross intersection comprises east-west direction craspedodrome phase place, east-west direction left turn phase, North and South direction craspedodrome phase place and North and South direction left turn phase;
In the time that described intersection is T-junction crossing, the concrete steps of described incision temporary signal comprise: signal is in phase place I: if section i is s
3, so to section s
6craspedodrome wagon flow sends out a warning, to section s
4left turn traffic gives a green light; If section i is s
5, so to section s
4craspedodrome wagon flow sends out a warning; Signal is in phase place II: if section i is s
1, so to section s
4left turn traffic sends out a warning, to section s
4craspedodrome wagon flow gives a green light; Signal is in phase place III: if section i is s
5, so to section s
2left turn traffic sends out a warning, to section s
6craspedodrome wagon flow gives a green light; Wherein, described section i is the section getting congestion, and described phase place I, described phase place II and described phase place III are the original signal phase place at described T-junction crossing, and described phase place I is that main road wagon flow is kept straight on, described phase place II is that main road wagon flow is turned left, and described phase place III is that branch road wagon flow is turned left.
2. method according to claim 1, is characterized in that, described temporary signal phase place also comprises:
Allowing not produce the wagon flow direction of conflicting with current current direction passes through.
3. method according to claim 1, is characterized in that:
When described intersection vehicle number be not more than threshold value and described in roll section away from the speed of a motor vehicle while being not less than threshold value, intersection signal phase is controlled by normal signal phase place.
4. an Adaptive Signal Control device of avoiding intersection deadlock, is characterized in that, comprising:
Information of vehicles acquisition device, for obtaining intersection vehicle number and the speed of a motor vehicle of rolling section away from current current direction; Wherein, described intersection vehicle number is to sail into and vehicle number poor of rolling described intersection away from;
Sig-nal-conditioning unit, for be greater than when described intersection vehicle number threshold value and described in roll section away from the speed of a motor vehicle while being less than threshold value, by intersection signal phase incision temporary signal phase place; Described temporary signal phase place comprises that the vehicle of forbidding current current direction sails intersection into and forbids that producing the wagon flow direction of conflicting with current current direction passes through;
In the time that described intersection is cross intersection, the concrete steps of described incision temporary signal comprise: if be now craspedodrome phase place, section, the upstream craspedodrome direction green light of section i becomes red light so, and the direction of keeping straight in the opposite direction green light is constant, and left-hand rotation direction red light becomes green light; If be now left turn phase, the left turn traffic signal lamp that enters so section i becomes red light from green light; Wherein, described section i is the section getting congestion; The original signal phase place of described cross intersection comprises east-west direction craspedodrome phase place, east-west direction left turn phase, North and South direction craspedodrome phase place and North and South direction left turn phase;
In the time that described intersection is T-junction crossing, the concrete steps of described incision temporary signal comprise: signal is in phase place I: if section i is s
3, so to section s
6craspedodrome wagon flow sends out a warning, to section s
4left turn traffic gives a green light; If section i is s
5, so to section s
4craspedodrome wagon flow sends out a warning; Signal is in phase place II: if section i is s
1, so to section s
4left turn traffic sends out a warning, to section s
4craspedodrome wagon flow gives a green light; Signal is in phase place III: if section i is s
5, so to section s
2left turn traffic sends out a warning, to section s
6craspedodrome wagon flow gives a green light; Wherein, described section i is the section getting congestion, and described phase place I, described phase place II and described phase place III are the original signal phase place at described T-junction crossing, and described phase place I is that main road wagon flow is kept straight on, described phase place II is that main road wagon flow is turned left, and described phase place III is that branch road wagon flow is turned left.
5. device according to claim 4, is characterized in that, described temporary signal phase place also comprises:
Allowing not produce the wagon flow direction of conflicting with current current direction passes through.
6. device according to claim 4, is characterized in that:
When described intersection vehicle number be not more than threshold value and described in roll section away from the speed of a motor vehicle while being not less than threshold value, intersection signal phase is controlled by prearranged signals phase place.
7. device according to claim 4, is characterized in that:
Described information of vehicles acquisition device comprises Loop Vehicle Detector; Described sig-nal-conditioning unit comprises teleseme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210012259.9A CN102637364B (en) | 2012-01-16 | 2012-01-16 | Adaptive signal method capable of avoiding deadlock of intersection and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210012259.9A CN102637364B (en) | 2012-01-16 | 2012-01-16 | Adaptive signal method capable of avoiding deadlock of intersection and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102637364A CN102637364A (en) | 2012-08-15 |
| CN102637364B true CN102637364B (en) | 2014-08-13 |
Family
ID=46621744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210012259.9A Expired - Fee Related CN102637364B (en) | 2012-01-16 | 2012-01-16 | Adaptive signal method capable of avoiding deadlock of intersection and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102637364B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198681B (en) * | 2013-03-20 | 2016-06-29 | 东南大学 | A kind of intersection signal control method towards public traffic in priority |
| CN104504927A (en) * | 2014-12-17 | 2015-04-08 | 深圳市电明科技有限责任公司 | Traffic indicator with interlocking function and traffic indicating system of traffic indicator |
| CN104794909B (en) * | 2015-04-09 | 2017-11-28 | 上海市政工程设计研究总院（集团）有限公司 | The prevention of intersection traffic obstruction and automatic emergency processing system and its processing method |
| CN105160895B (en) * | 2015-09-25 | 2017-05-24 | 哈尔滨工业大学 | Signal timing method for four-road ring intersection based on backward movement of stop line |
| CN105702058A (en) * | 2016-02-29 | 2016-06-22 | 宇龙计算机通信科技(深圳)有限公司 | Crossroad traffic light intelligent control method and system on the basis of vehicle positioning |
| CN105957372A (en) * | 2016-07-01 | 2016-09-21 | 合肥未来计算机技术开发有限公司 | Traffic signal lamp control method |
| CN106710251B (en) * | 2017-01-20 | 2023-02-07 | 黄勇 | Control system for controlling traffic flow, device and method for controlling traffic flow |
| CN107464432A (en) * | 2017-07-11 | 2017-12-12 | 佛山职业技术学院 | A kind of system and method for controlling photovoltaic unmanned aerial vehicle group to dredge freeway traffic |
| CN108109403B (en) * | 2017-12-29 | 2020-12-22 | 珠海国芯云科技有限公司 | Adaptive traffic light control system and method based on traffic flow |
| CN108399760A (en) * | 2018-04-03 | 2018-08-14 | 浙江警察学院 | A kind of ground induction coil formula red time lengthening device and its method |
| CN108629990A (en) * | 2018-06-14 | 2018-10-09 | 重庆同济同枥信息技术有限公司 | A kind of real-time dynamic timing method and system based on multi-source data |
| CN108847039A (en) * | 2018-07-06 | 2018-11-20 | 郑州云海信息技术有限公司 | A kind of traffic lights self-adaptation control method and system |
| CN109147363B (en) * | 2018-09-10 | 2020-10-27 | 吉林大学 | Intelligent traffic guiding system and guiding method |
| CN109215351A (en) * | 2018-11-07 | 2019-01-15 | 沈阳天久信息技术工程有限公司 | The method and device for preventing intersection locked |
| CN111369815B (en) * | 2019-05-21 | 2021-11-02 | 杭州海康威视系统技术有限公司 | Signal control method and device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000003496A (en) * | 1998-06-12 | 2000-01-07 | Kazuharu Ikeuchi | Traffic accident preventing equipment |
| JP4159976B2 (en) * | 2003-12-17 | 2008-10-01 | 株式会社京三製作所 | Traffic signal control device, traffic signal control method, and storage medium |
| CN100592351C (en) * | 2006-08-10 | 2010-02-24 | 深圳市哈工大交通电子技术有限公司 | A traffic signal lamp control method and traffic signal lamp system |
| JP5067623B2 (en) * | 2007-12-21 | 2012-11-07 | 株式会社デンソー | Intersection vehicle collision prevention system |
| CN101470964A (en) * | 2007-12-26 | 2009-07-01 | 奥城同立科技开发（北京）有限公司 | Anti-jam traffic signal light control system based on induction coil |
| CN101572000A (en) * | 2008-04-30 | 2009-11-04 | 奥城同立科技开发（北京）有限公司 | Intersection-traffic control method giving priority to trunk roads |
| CN101593431A (en) * | 2008-05-26 | 2009-12-02 | 奥城同立科技开发（北京）有限公司 | The method of automatically regulating vehicle traffic condition at crossing |
| CN201638391U (en) * | 2010-01-22 | 2010-11-17 | 海南光信科技有限公司 | Human-computer intelligent command system for urban traffic |
-
2012
- 2012-01-16 CN CN201210012259.9A patent/CN102637364B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102637364A (en) | 2012-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102637364B (en) | Adaptive signal method capable of avoiding deadlock of intersection and device | |
| CN107767666B (en) | Intelligent detection single-point control intersection exit traffic flow overflow prevention and control method | |
| CN103985261B (en) | Based on method for controlling traffic signal lights and the system of vehicle queue length measuring and calculating | |
| CN105844923B (en) | A kind of induction type pedestrian's street crossing signal control method and system | |
| CN103927868B (en) | A kind ofly can find the method and system causing area traffic jamming reason | |
| CN100592351C (en) | A traffic signal lamp control method and traffic signal lamp system | |
| CN102542823B (en) | Expressway variable speed limit control method on basis of operation state of traffic flow | |
| CN102542817B (en) | Cooperative control method of left-opened-door bus special phase setting and social traffic flow | |
| CN104966402A (en) | Supersaturated traffic flow intersection queue overflow prevention and control method | |
| CN105160917A (en) | Vehicle and road collaborative information-based signalized intersection vehicle speed guidance system and method | |
| WO2019080874A1 (en) | Method for vehicle to pass by switching lanes and control center | |
| CN105336183A (en) | Traffic congestion control method and device based on road section passing capacity | |
| CN104021673B (en) | Radar tracking technology is utilized to find fast to block up and cause the system and method for reason | |
| CN103903444B (en) | A kind of instant discovery through street blocks up and causes the method and system of point | |
| CN103186984A (en) | Method for triggering transformation of steering function of variable guidance lanes at urban intersections | |
| CN105279977A (en) | Stretched Intersection and Signal Warning System | |
| CN104575038A (en) | Intersection signal control method considering priority of multiple buses | |
| CN103700251A (en) | Variable speed limiting and ramp control coordination and optimization control method on expressway | |
| CN103871258A (en) | Signal control method for preventing dead lock of intersection | |
| CN109559509B (en) | Signal control induced distribution method based on emergency | |
| CN108871357B (en) | Method for displaying accident lane of congested road section on electronic map | |
| CN104021682A (en) | Oversaturated intersection self-repairing control method | |
| CN108898834A (en) | A kind of intellectual traffic control method monitoring traffic accident at intersection | |
| CN103236164A (en) | Vehicle controlling method for guaranteeing public transport vehicle priority passing | |
| CN103065479A (en) | Method and system of controlling traffic signal of public transport priority |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20170116 |