CN107680390A - A kind of traffic signal control scheme generation method based on map - Google Patents
A kind of traffic signal control scheme generation method based on map Download PDFInfo
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- CN107680390A CN107680390A CN201710840220.9A CN201710840220A CN107680390A CN 107680390 A CN107680390 A CN 107680390A CN 201710840220 A CN201710840220 A CN 201710840220A CN 107680390 A CN107680390 A CN 107680390A
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- entrance driveway
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- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
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Abstract
The present invention relates to a kind of traffic signal control scheme generation method based on map, the traffic signal control scheme that this method generates is by least one NEMA ring groups into each NEMA rings correspond to the control phase of an entrance driveway group, specifically include following steps：1) whether judgement is current in net connection car environment, if so, then circular test current point in time, in setting duration before reaching period end time point, performs step 2), if it is not, terminating after then performing step 2) successively 4)；2) information carries out entrance driveway group and the one-to-one corresponding of NEMA rings according to the map；3) signal timing dial is carried out using Robert Webster signal timing dial method and collision avoidance mechanism, obtains ring length, semi-cycle length and the phase lengths of each NEMA rings；4) generate traffic signal control scheme and send.Compared with prior art, the present invention has the advantages that versatility is high, real-time is high.
Description
Technical field
The present invention relates to the signal-control crossing control technology field under car networking environment, and map is based on more particularly, to one kind
Traffic signal control scheme generation method.
Background technology
Traffic congestion is still each metropolitan common fault at present, and the main node of traffic congestion is that signal control is handed over
Prong.From 1868, First traffic lights were arranged on London WestMinster areas in the world, had opened city friendship
The prelude of prong traffic control, the by now adaptive urban transportation control such as technology and function all quite perfect SCOOT and SCATS
The extensive use of system processed in the world, the development of urban traffic control system have been passed by 3 epoch.Match somebody with somebody from offline
When optimization software to online real-time adaptive control system；From single automobile traffic control to the control of complicated traffic object
System；Control theory and technology are also developed into using advanced feedback intelligent control theory and technology, state from simple opened loop control
Inside and outside research unit and entity have put into enormous expenditure and have carried out research and development, and are promoted to industrialization.But urban transportation
The potentiality of control system do not develop completely yet, and this is primarily limited to the precision and reliability of care testing device, and lacks
Weary and real-time road traffic inducible system combination, with the fast development of car networking technology, urban traffic control system is ground
Study carefully exploitation and enter third generation system stages, i.e., the urban traffic adaptive control system being combined with car networking.The master of system
Feature is wanted to show as：Combined closely with road traffic real-time guidance system, make traffic flow on road network more balanced；It can obtain more
Add accurate reliable Real-time Traffic Information, information updating frequency is accelerated, and the accuracy and applicability for making optimized algorithm greatly improve.
At present, for the control method that uses of signalized intersections control be nearly all with Robert Webster method (it is domestic mostly on
Haifa) calculated for source, but such method has a problem that the intersection needs aiming at different structure
Different timing structures is designed, therefore signal-control crossing scheme must be designed by professional person, and also subsequent adjustment is also more
Be duration to timing in itself adjustment and non-structural adjustment, lack it is a kind of it is effective it is general be applied to various forms,
Various state intersections can real-time update signal timing plan structure method for building up.
The content 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 friendship based on map
Messenger control program generation method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of traffic signal control scheme generation method based on map, this method generation traffic signal control scheme by
At least one NEMA ring groups are into each NEMA rings correspond to the control phase of an entrance driveway group.
Further, this method specifically includes following steps：
1) judge that the current net that whether is in joins car environment, if so, then circular test current point in time, reaches end cycle
Before time point set duration when, perform step 2), if it is not, then successively perform step 2) -4) after terminate；
2) information carries out entrance driveway group and the one-to-one corresponding of NEMA rings according to the map；
3) signal timing dial is carried out using Robert Webster signal timing dial method and collision avoidance mechanism, obtains the ring of each NEMA rings
Long, semi-cycle length and phase lengths；
4) generate traffic signal control scheme and send.
Further, the step 1), a length of 3s during setting.
Further, the step 2) is specially：
Entrance driveway is grouped according to entrance driveway deflection, the corresponding NEMA ring of each entrance driveway group, each import
The corresponding semi-ring in road.
Further, when being grouped, join car environment if net, then only the entrance driveway for having vehicle is grouped, if
Non- net connection car environment, then be grouped to all entrance driveway.
When further, using the Robert Webster signal timing dial method, entrance driveway saturation degree and track group are considered
Quantity determines timing order.
Further, the collision avoidance mechanism includes：
A) in the design of each semi-ring, first keep straight on and turn left afterwards, and phase sequence is identical；
When b) carrying out multiphase traffic time allocation calculating from high to low by entrance driveway saturation degree, if straight trip dedicated phase, calculating are
No supersaturation, if supersaturated, calculate and let pass the time simultaneously, obtain the straight trip green light end time, otherwise matched somebody with somebody in proportion
When；
C) entrance driveway timing time when traversal prepares, if not occurring supersaturation, the green light end time terminates for this
Time, if supersaturation occurs in front, contrasted with time starting point of letting pass simultaneously, if green time length exceedes the time
Point, then straight trip green light is shorten to the time, the time started of turning left, preceding entrance driveway was kept straight on the green light end time for it.
Compared with prior art, the invention has the advantages that：
1st, the present invention has broken traditional timing NEMA (National Electrical Manufacturers
Association) the structure of ring, realize map datum and carried out corresponding and matching with control program, hardware facility, realize
To the good adaptability of various intersection physical arrangements, realize substantially general；
2nd, present invention employs more classical Robert Webster method, the inspection by history has preferable stability and Shandong
Rod, and required parameter is few, it is simple to calculate, and reduces the operation time of algorithm so that and algorithm real-time is strong, overall apparently to calculate
The practicality of method is preferable compared with strong and versatility；
3rd, versatility is high, it is only necessary to cartographic information and signal lamp interface message input can are completed into operation, it is operable
Property it is high, low is required to user's specialty, is easy to popularize；
4th, car networking data can be combined, realize the real-time optimization to timing.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the present invention；
Fig. 2 is the intersection schematic diagram used in the embodiment of the present invention.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
The present embodiment provides a kind of traffic signal control scheme generation method based on map, the traffic letter of this method generation
Number control program is by least one NEMA ring groups into, the control phase of each corresponding entrance driveway group of the NEMA rings, the party
Method carries out signal timing dial using Robert Webster signal timing dial method and collision avoidance mechanism, obtains ring length, the semi-ring of each NEMA rings
Long and phase lengths.
Semi-ring in this method is different from the semi-ring in traditional sense NEMA rings.For entering in any one entrance driveway group
Mouth road quantity is not to determine, and traditional design is to be directed to standard cross junction, and the design of its semi-loop is to be directed to two
Entrance driveway, if multiple, need to design one by one, such as in the case of having multiple entrance driveway for standard cross junction
The structure of response is then can-not be automatically generated, because the corresponding relation do not fixed is, it is necessary to personalized designs.And this method proposes one
The new semi-loop of kind, i.e., correspond to a semi-ring with the one-to-one semi-ring of entrance driveway, each entrance driveway.Set by such
Meter, traffic control scheme are made up of ring group, and intersection is made up of entrance driveway group, the corresponding entrance driveway group of each ring, Mei Gejin
Mouthful road is one-to-one with semi-ring, realizes contacting for map and signal timing plan.
Due to having broken half traditional ring mechanism, it is therefore desirable to which effective mechanism avoids to liquidate to advance by leaps and bounds to go, and is left first
Turn to conflict with what is kept straight on, thus it is identical firstly the need of the phase sequence of each entrance driveway in same ring is made, even if secondly order is identical,
Because the phase calculation of each entrance driveway is independent, phase lengths are not necessarily identical, therefore should have a crucial entrance driveway,
Using the straight trip green light of the crucial entrance driveway as mark post, if the straight trip green time of other entrance driveway is than the straight trip green time
It is short, then should be using the green time as green time, to avoid conflicting.Avoidance mechanism is summarized as follows：
1. each semi-ring should first keep straight on, turn left afterwards, ensure that phase sequence is identical；
2. carrying out multiphase traffic time allocation calculating from high to low by entrance driveway saturation degree, if straight trip dedicated phase, whether calculating
Supersaturation, if supersaturated, calculate and let pass the time simultaneously, provide the straight trip green light end time, otherwise carry out timing in proportion, i.e.,
According to each phase maximum stream flow than ratio be each phase assignments green time；
3. the timing time of entrance driveway when being prepared before traversal, contrasted, if not occurring supersaturation, green light terminates
Time is the green light end time of the entrance driveway same-phase, if supersaturation occurs in front, with time starting point of letting pass simultaneously
Contrast, if green time length exceedes front supersaturation phase and kept straight on the time point let pass with left-hand rotation simultaneously, it will keep straight on green
Lamp shorten to the time, and the time started of turning left, preceding entrance driveway was kept straight on the green light end time for it.
To sum up, as shown in figure 1, the inventive method specifically includes following steps：
(1) current point in time and period end time point are then examined if net connection car environment, when closing to an end in the cycle, week
The phase boundary that closes to an end is 3s, performs step (2), otherwise performs step (1), and step is directly performed if non-net connection car environment
(2) to (11), not real-time iterative；
(2) entrance driveway is entered according to entrance driveway (being then all entrance driveway if the non-net connection car environment) deflection for having vehicle
Row packet, each corresponding ring of group, if only including an entrance driveway in some entrance driveway group, the ring of the entrance driveway group is
One semi-ring；
(3) the corresponding semi-ring of each entrance driveway, semi-ring is added in ring；
(4) each track group, entrance driveway, entrance driveway group saturation degree are determined, ring length and semi-cycle length, tool are determined according to entrance driveway group
Body is：According to each entrance driveway group maximum saturation using Robert Webster method (upper Haifa) calculating cycle duration, according to cycle duration
Each entrance driveway group distribution transit time is given with the ratio of each entrance driveway group maximum saturation, i.e. ring is grown, and semi-cycle length is grown with ring；
(5) comprehensive entrance driveway saturation degree and the descending sequence of track group quantity；
(6) each phase lengths are determined according to track group saturation degree ratio；
(7) supersaturation is checked whether, if supersaturated, carries out phase extension；
(8) entrance driveway when being prepared before traversal, phase extension is checked whether there is, if then performing step (9), otherwise
Perform step (10)；
(9) green time is kept straight on using the green light time started of turning left as the end time, and left-hand rotation started as the end time of keeping straight on；
(10) using the straight trip green time of first entrance driveway as straight trip green time, left-hand rotation green time is adjusted；
(11) whether it is last entrance driveway, if not, skipping to the 6th step, otherwise, performs step (12)；
(12) signal lamp is generated to send instruction and send.
Comprehensive entrance driveway saturation degree and track group quantity are ranked up what is specifically determined by a coefficient in step (5),
Can be that the track group multiply a coefficient when there is left-hand rotation entrance driveway, the coefficient takes 1.5, whenever not having left turn phase in a cycle
When coefficient increase by 1, the reason for such value and design when being in order to avoid causing long to the left turning vehicle of low discharge entrance driveway
Between overstock.
By taking intersection as shown in Figure 2 as an example, intersection should be allocated as to two rings according to the method described above, wherein thing enters
Mouth road forms a ring, and southern entrance driveway is a ring (ring only has a semi-ring).In thing entrance driveway, western entrance driveway is straight
OK, eastern entrance driveway for straight trip plus turns left.Western one phase of entrance driveway, eastern two phases of entrance driveway, southern two phases of entrance driveway.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Creative work can is needed to make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (7)
- A kind of 1. traffic signal control scheme generation method based on map, it is characterised in that the traffic signals of this method generation Control program is by least one NEMA ring groups into each NEMA rings correspond to the control phase of an entrance driveway group.
- 2. the traffic signal control scheme generation method according to claim 1 based on map, it is characterised in that this method Specifically include following steps：1) judge that the current net that whether is in joins car environment, if so, then circular test current point in time, reaches period end time Point before setting duration when, perform step 2), if it is not, then successively perform step 2) -4) after terminate；2) information carries out entrance driveway group and the one-to-one corresponding of NEMA rings according to the map；3) signal timing dial is carried out using Robert Webster signal timing dial method and collision avoidance mechanism, the ring for obtaining each NEMA rings is long, Semi-cycle length and phase lengths；4) generate traffic signal control scheme and send.
- 3. the traffic signal control scheme generation method according to claim 2 based on map, it is characterised in that the step It is rapid 1), a length of 3s during setting.
- 4. the traffic signal control scheme generation method according to claim 2 based on map, it is characterised in that the step It is rapid 2) to be specially：Entrance driveway is grouped according to entrance driveway deflection, the corresponding NEMA ring of each entrance driveway group, each entrance driveway pair Answer a semi-ring.
- 5. the traffic signal control scheme generation method according to claim 4 based on map, it is characterised in that divided Group when, if net join car environment, then only the entrance driveway for having vehicle is grouped, if it is non-net connection car environment, then to it is all enter Mouth road is grouped.
- 6. the traffic signal control scheme generation method according to claim 2 based on map, it is characterised in that using institute When stating Robert Webster signal timing dial method, consider entrance driveway saturation degree and track group quantity determines timing order.
- 7. the traffic signal control scheme generation method according to claim 2 based on map, it is characterised in that the punching Prominent avoidance mechanism includes：A) in the design of each semi-ring, first keep straight on and turn left afterwards, and phase sequence is identical；When b) carrying out multiphase traffic time allocation calculating from high to low by entrance driveway saturation degree, if straight trip dedicated phase, calculate whether mistake Saturation, if supersaturated, calculate and let pass the time simultaneously, obtain the straight trip green light end time, otherwise carry out timing in proportion；C) entrance driveway timing time when traversal prepares, if not occurring supersaturation, the green light end time is the end time, ,, will if green time length exceedes the time point with time starting point contrast of letting pass simultaneously if supersaturation occurs in front Straight trip green light shorten to the time, and the time started of turning left, preceding entrance driveway was kept straight on the green light end time for it.
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Cited By (1)
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| CN113362623A (en) * | 2021-06-04 | 2021-09-07 | 哈尔滨工业大学 | Continuous flow intersection left-turn non-motor vehicle traffic organization system and signal control method |
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