CN102034360A - Method and device for realizing self-adaption of traffic light - Google Patents
Method and device for realizing self-adaption of traffic light Download PDFInfo
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Abstract
The invention relates to a method and a device for realizing self-adaption of a traffic light. The method comprises the following steps of: acquiring traffic flow information in a predetermined range in each direction of an intersection by shooting in real time; and controlling the traffic light in a traffic light conversion period according to the traffic flow information, history traffic light information stored in a traffic light information database and preset pass matching modes. Based on the acquired real-time traffic flow information in different directions of the intersection, calculating history pass data under the same condition are calculated according to the mutex relationship among pass directions of the intersection and all preset pass matching modes calculated according to the mutex relationship so as to obtain optimal pass time of the intersection; and an appropriate pass scheme can be provided for the intersection in each traffic light conversion period in a step-by-step iteration mode, so that average vehicle waiting time is reduced, optimal pass control of the intersection is realized, intelligent self-adaption effect of the traffic light is achieved and road resource is utilized more fully.
Description
Technical field
The present invention relates to traffic signals control field, relate in particular to adaptive method of a kind of realization traffic lights and device.
Background technology
In existing controlling system of traffic light, to the substantially realization intellectuality of control of traffic lights, parameters such as the conversion sequence of its traffic lights and switching time all are by manually fixedly installing, not carrying out active according to real-time road conditions and adapt to.
At present, the traffic lights system that can regulate controlled variable according to vehicle flowrate is automatically also arranged, it such as application number 200810112910.3 Chinese patent, the purpose of this patent is according to the magnitude of traffic flow variation of different directions and the traffic in whole zone, automatically carry out the adjusting of traffic lights controlled variable, to improve the traffic efficiency at crossing, realize region-wide traffic optimization.Its system comprises the crossing control system that universe traffic control center communicates by letter with some and described universe traffic control center, and crossing control system comprises manual input device, force switch device, intelligent detection device and remote communication module etc.The obtaining and analyzing of video image when satisfying the need cause for gossip of this patent, each road stopped vehicle is discerned, calculate vehicle lay-off queuing distance, go out to revise the instruction of traffic lights controlled variable more on this basis by default program calculating and sending, reached the purpose of traffic lights dynamically adapting road conditions.
But, this patented technology has following deficiency: though the adjustment principle of some traffic lights controlled variable is provided, but it has mainly solved according to crossing vehicle lay-off queuing distance the traffic lights controlled variable has been set, thereby can't provide a parameter relatively accurately to traffic lights control.
Summary of the invention
Fundamental purpose of the present invention is to provide adaptive method of a kind of realization traffic lights and device, is intended to improve the traffic efficiency at traffic lights crossing.
In order to achieve the above object, the present invention proposes the adaptive method of a kind of realization traffic lights, comprising:
Take the car flow information of obtaining in all directions preset range of crossing in real time; Described car flow information comprises wagon flow quantity and wagon flow direction;
According to car flow information, be stored in historical traffic lights information in the traffic lights information bank and default current matching way, traffic lights are controlled in the change-over period at traffic lights.
Preferably, described according to car flow information, be stored in historical traffic lights information in the traffic lights information bank and default current matching way, the step that traffic lights are controlled is comprised in the change-over period at traffic lights:
From the traffic lights information bank, obtain with current same direction on the vehicle fleet size corresponding historical vehicle pass-through time, average as vehicle transit time on current this direction;
According to the vehicle pass-through time on all directions and the mutex relation of each current direction, be the set vehicle transit time of not mutual exclusion;
Set transit time according to each, utilize the exhaustive computations method to calculate in all default current matching ways current matching way the shortest when total, as current current matching way;
Respectively set transit time and current current matching way is controlled traffic lights with described.
Preferably, described according to the vehicle pass-through time on all directions and the mutex relation of each current direction, for the step of the set vehicle transit time of not mutual exclusion comprises:
Choose the setting transit time of transit time the longest in the transit time of vehicle of not mutual exclusion as the vehicle of described not mutual exclusion.
Preferably, described according to car flow information, be stored in historical traffic lights information in the traffic lights information bank and default current matching way, the step that traffic lights are controlled is also comprised in the change-over period at traffic lights:
When do not exist in the traffic lights information bank with current same direction on vehicle fleet size corresponding historical vehicle pass-through during the time, get the acquiescence transit time as vehicle transit time on current this direction.
Preferably, the described step of traffic lights being controlled with setting transit time and current current matching way also comprises afterwards:
With current traffic lights in the change-over period information of each current direction deposit in the traffic lights information bank.
The present invention also proposes the adaptive device of a kind of realization traffic lights, comprising:
The car flow information acquisition module is used for taking in real time the car flow information of obtaining in all directions preset range of crossing; Described car flow information comprises wagon flow quantity and wagon flow direction;
The traffic lights control module is used in the change-over period traffic lights being controlled at traffic lights according to car flow information, the historical traffic lights information that is stored in the traffic lights information bank and default current matching way.
Preferably, described traffic lights control module comprises:
Acquiring unit, be used for from the traffic lights information bank obtain with current same direction on the vehicle fleet size corresponding historical vehicle pass-through time, average as the line time all of vehicle on current this direction;
Setup unit according to the vehicle pass-through time on all directions and the mutex relation of each current direction, is the set vehicle transit time of not mutual exclusion;
Computing unit is used for setting transit time according to each, utilizes the exhaustive computations method to calculate in all default current matching ways current matching way the shortest when total, as current current matching way;
Control module is used for respectively setting transit time and current current matching way is controlled traffic lights with described.
Preferably, described setup unit also is used for choosing the setting transit time of the longest transit time of the transit time of vehicle of not mutual exclusion as the vehicle of described not mutual exclusion.
Preferably, described acquiring unit also be used for when the traffic lights information bank do not exist with current same direction on vehicle fleet size corresponding historical vehicle pass-through during the time, get the acquiescence transit time as vehicle transit time on current this direction.
Preferably, described device also comprises:
Memory module, be used for current traffic lights in the change-over period information of each current direction deposit the traffic lights information bank in.
Adaptive method of a kind of realization traffic lights and device that the present invention proposes, by mutex relation, all directions of each current direction of crossing being given tacit consent to transit time and being deposited in the traffic lights information bank according to all default current matching ways that mutex relation calculates, on the basis that obtains crossing, place different directions real-time traffic flow amount information, to calculating, obtain the current Best Times in crossing with historical current data under the condition; And by the mode of iteration progressively, make each traffic lights change-over period of crossing, place that a suitable current scheme all can be provided, reduced the vehicle average latency, improved the traffic efficiency at traffic lights crossings, realized the current Optimal Control in crossing, reach the adaptive effect of intelligent traffic light, thereby utilized path resource more fully.
Description of drawings
Fig. 1 is that the present invention realizes the adaptive method one embodiment schematic flow sheet of traffic lights;
Fig. 1 a is the exemplary plot of a crossroad;
Fig. 2 is that the present invention realizes among adaptive method one embodiment of traffic lights according to car flow information, is stored in historical traffic lights information in the traffic lights information bank and default current matching way, the schematic flow sheet of in the change-over period traffic lights being controlled at traffic lights;
Fig. 3 is that the present invention realizes the adaptive device one example structure synoptic diagram of traffic lights;
Fig. 4 is the structural representation that the present invention realizes traffic lights control module among adaptive device one embodiment of traffic lights.
In order to make technical scheme of the present invention clearer, clear, be described in further detail below in conjunction with accompanying drawing.
Embodiment
Solution for embodiment of the invention mainly is by mutex relation, all directions of each current direction of crossing being given tacit consent to transit time and being deposited in the traffic lights information bank according to all default current matching ways that mutex relation calculates, on the basis that obtains crossing, place different directions real-time traffic flow amount information, to calculating, obtain the current Best Times in crossing with historical current data under the condition.
As shown in Figure 1, one embodiment of the invention proposes the adaptive method of a kind of realization traffic lights, comprising:
Step S101 takes the car flow information of obtaining in all directions preset range of crossing in real time;
Car flow information comprises wagon flow quantity and wagon flow direction;
Reasonable control for the lipstick green light of realizing satisfying the need, at first by real-time wagon flow video pictures of taking the crossing all directions such as road video cameras, the scope of taking can be set according to actual road conditions, and as shown in Figure 1a, the dotted line scope is the vehicle pass-through target in the traffic lights change-over period.
Carry out graphical analysis according to the wagon flow video pictures of taking, therefrom obtain car flow information, comprising: the time that the vehicle fleet size of all directions, vehicle pass-through use etc.
Step S102 according to car flow information, be stored in historical traffic lights information in the traffic lights information bank and default current matching way, controls traffic lights in the change-over period at traffic lights.
In the present embodiment, be provided with the traffic lights information bank of the related data that is used to store each traffic lights change-over period, comprise current direction, traffick quantity, the vehicle pass-through time etc., store the common data at crossing, place simultaneously, mutex relation (as shown in table 1 below) as the current direction in each crossing, (for example " E-＞W " can be current simultaneously with " E-＞S " for all directions acquiescences transit time and all default current matching ways of calculating according to mutex relation, also can be current simultaneously etc.) with " W-＞E ", so that the later stage reference provides one progressively to reach optimum foundation.
| ?E-＞W | ?E-＞S | ?S-＞N | ?S-＞W | ?W-＞E | ?W-＞N | ?N-＞S | ?N-＞E | |
| ?E-＞W | ?Y | ?Y | ?Y | |||||
| ?E-＞S | ?Y | ?Y | ?Y |
| ?S-＞N | ?Y | ?Y | ?Y | |||||
| ?S-＞W | ?Y | ?Y | ?Y | |||||
| ?W-＞E | ?Y | ?Y | ?Y | |||||
| ?W-＞N | ?Y | ?Y | ?Y | |||||
| ?N-＞S | ?Y | ?Y | ?Y | |||||
| ?N-＞E | ?Y | ?Y | ?Y |
Table 1
Exclusive message example between each current direction of crossroad of last table 1 expression, each alphabetical implication is: E (east), S (south), W (west), N (north), " E-＞W " expression from the east orientation west to, alphabetical Y represents that corresponding both direction can pass through simultaneously in the form; Do not consider temporarily situation in this example to right travel.
When first use car flow information is carried out traffic lights control, at first need each current direction mutex relation of crossing, place, all directions acquiescence transit time and possible various current matching way are input in the traffic lights information bank, when a traffic lights change-over period finishes, also need the information (comprising the interior actual current vehicle number of transit time of the transit time of current direction, target passing vehicle number, setting, the transit time of finishing the actual use of target or setting etc.) of each the current direction in this cycle is deposited in the traffic lights information bank as historical traffic lights information.
Each the wagon flow direction of crossing obtained according to step S101 and the vehicle fleet size on each wagon flow direction, from the traffic lights database, search historical traffic lights information, therefrom obtain historical record under equal conditions, actual transit time such as same vehicle quantity on the identical wagon flow direction is the historical vehicle pass-through time, and each historical vehicle pass-through time averaged is made as under this condition current vehicle and finishes current required best transit time.If write down the current best transit time of each historical vehicle pass-through time under the equal conditions in the traffic lights database, then need not to calculate, directly obtain this current best transit time.
If carry out first traffic lights control or when do not exist in the traffic lights information bank with current same direction on vehicle fleet size corresponding historical vehicle pass-through during the time, get the acquiescence transit time and finish the required best transit time that passes through as vehicle on current this direction.
Obtain all directions after the current time that needs, according to the mutex relation between each current direction, calculate the shortest a kind of current matching way of interim T.T. of this week with the method for exhaustion, for example: if " E-＞W " needs 50 seconds, " W-＞E " needs 30 seconds, " E-＞S " needs 40 seconds, then select " E-＞W " and " E-＞S " current simultaneously, set the transit time of each current direction simultaneously, for example when " E-＞W " and " E-＞S " are current simultaneously, the setting transit time is both required time the greater, and " E-＞W " the 50 seconds needed time that is about to is as the current simultaneously common setting transit time of both direction.
Then, set transit time, and utilize the exhaustive computations method to calculate in all default current matching ways current matching way the shortest when total, as current current matching way according to all; And set transit time and current current matching way is controlled traffic lights as the traffic lights parameter with each.
After this cycle, control finished, also need the information of each current direction in this cycle is deposited in the traffic lights information bank.With the reference frame of the traffic lights parameter being controlled as next time, iteration progressively thus, make each traffic lights change-over period at crossing, place that a suitable current scheme all can be provided, reduce the vehicle average latency, realization is to the current Optimal Control in crossing, reach the adaptive effect of intelligent traffic light, thereby utilized path resource more fully.
As shown in Figure 2, step S102 comprises:
Step S1021, from the traffic lights information bank, obtain with current same direction on the vehicle fleet size corresponding historical vehicle pass-through time, average as vehicle transit time on current this direction;
When do not exist in the traffic lights information bank with current same direction on vehicle fleet size corresponding historical vehicle pass-through during the time, get the acquiescence transit time as vehicle transit time on current this direction.
Step S1022 according to the vehicle pass-through time on all directions and the mutex relation of each current direction, is the set vehicle transit time of not mutual exclusion;
Wherein, the vehicle of not mutual exclusion is the different but vehicle that can pass through simultaneously of finger direction.Choose the setting transit time of transit time the longest in the transit time of vehicle of not mutual exclusion as the vehicle of not mutual exclusion.
Step S1023 sets transit time according to each, utilizes the exhaustive computations method to calculate in all default current matching ways current matching way the shortest when total, as current current matching way;
Step S1024 controls traffic lights with each setting transit time and current current matching way.
Step S1025, with current traffic lights in the change-over period information of each current direction deposit in the traffic lights information bank.
Wherein, the information of each current direction comprises in the current traffic lights change-over period: the transit time of current direction, target passing vehicle number, setting, whether finish target, if also need write down the transit time of finishing the actual use of target; If not, also need write down and set the interior actual current vehicle number of finishing of transit time, for example " E-＞W; target passing vehicle number 15; setting transit time is 50 seconds; set in the transit time and finished target; finishing the actual used time of target is 45 seconds ", be written in the traffic lights information bank, search for the historical record with (" E-＞W; finish current 15 cars ") under the condition simultaneously, obtain actual used transit time in the corresponding record, averaging is made as current best transit time current under this condition.So that during next time inquiry traffic lights information bank with reference to use.
Present embodiment to calculating with historical current data under the condition, obtains the current Best Times in crossing on the basis that obtains crossing, place different directions real-time traffic flow amount information, and progressively perfect, has realized the current Optimal Control in crossing.
As shown in Figure 3, one embodiment of the invention proposes the adaptive device of a kind of realization traffic lights, comprising: car flow information acquisition module 301 and traffic lights control module 302, wherein:
Car flow information acquisition module 301 is used for taking in real time the car flow information of obtaining in all directions preset range of crossing; Described car flow information comprises wagon flow quantity and wagon flow direction;
Reasonable control for the lipstick green light of realizing satisfying the need, at first by real-time wagon flow video pictures of taking the crossing all directions such as video cameras in the car flow information acquisition module 301, the scope of taking can be set according to actual road conditions, as shown in Figure 1a, the dotted line scope is the vehicle pass-through target in the traffic lights change-over period.
Carry out graphical analysis according to the wagon flow video pictures of taking, therefrom obtain car flow information, comprising: the time that the vehicle fleet size of all directions, vehicle pass-through use etc.
Traffic lights control module 302 is used in the change-over period traffic lights being controlled at traffic lights according to car flow information, the historical traffic lights information that is stored in the traffic lights information bank and default current matching way.
In the present embodiment, be provided with the traffic lights information bank of the related data that is used to store each traffic lights change-over period, comprise current direction, traffick quantity, the vehicle pass-through time etc., store the common data at crossing, place simultaneously, mutex relation (as shown in table 1 below) as the current direction in each crossing, (for example " E-＞W " can be current simultaneously with " E-＞S " for all directions acquiescences transit time and all default current matching ways of calculating according to mutex relation, also can be current simultaneously etc.) with " W-＞E ", so that the later stage reference provides one progressively to reach optimum foundation.
| ?E-＞W | ?E-＞S | ?S-＞N | ?S-＞W | ?W-＞E | ?W-＞N | ?N-＞S | ?N-＞E | |
| ?E-＞W | ?Y | ?Y | ?Y | |||||
| ?E-＞S | ?Y | ?Y | ?Y | |||||
| ?S-＞N | ?Y | ?Y | ?Y | |||||
| ?S-＞W | ?Y | ?Y | ?Y | |||||
| ?W-＞E | ?Y | ?Y | ?Y | |||||
| ?W-＞N | ?Y | ?Y | ?Y | |||||
| ?N-＞S | ?Y | ?Y | ?Y | |||||
| ?N-＞E | ?Y | ?Y | ?Y |
Table 1
Exclusive message example between each current direction of crossroad of last table 1 expression, each alphabetical implication is: E (east), S (south), W (west), N (north), " E-＞W " expression from the east orientation west to, alphabetical Y represents that corresponding both direction can pass through simultaneously in the form; Do not consider temporarily situation in this example to right travel.
When first use car flow information is carried out traffic lights control, at first need each current direction mutex relation of crossing, place, all directions acquiescence transit time and possible various current matching way are input in the traffic lights information bank, when a traffic lights change-over period finishes, also need the information (comprising the interior actual current vehicle number of transit time of the transit time of current direction, target passing vehicle number, setting, the transit time of finishing the actual use of target or setting etc.) of each the current direction in this cycle is deposited in the traffic lights information bank as historical traffic lights information.
Each wagon flow direction of crossing that traffic lights control module 302 is obtained according to car flow information acquisition module 301 and the vehicle fleet size on each wagon flow direction, from the traffic lights database, search historical traffic lights information, therefrom obtain historical record under equal conditions, actual transit time such as same vehicle quantity on the identical wagon flow direction is the historical vehicle pass-through time, and each historical vehicle pass-through time averaged is made as under this condition current vehicle and finishes current required best transit time.If write down the current best transit time of each historical vehicle pass-through time under the equal conditions in the traffic lights database, then need not to calculate, directly obtain this current best transit time.
If carry out first traffic lights control or when do not exist in the traffic lights information bank with current same direction on vehicle fleet size corresponding historical vehicle pass-through during the time, get the acquiescence transit time and finish the required best transit time that passes through as vehicle on current this direction.
Obtain all directions after the current time that needs, according to the mutex relation between each current direction, calculate the shortest a kind of current matching way of interim T.T. of this week with the method for exhaustion, for example: if " E-＞W " needs 50 seconds, " W-＞E " needs 30 seconds, " E-＞S " needs 40 seconds, then select " E-＞W " and " E-＞S " current simultaneously, set the transit time of each current direction simultaneously, for example when " E-＞W " and " E-＞S " are current simultaneously, the setting transit time is both required time the greater, and " E-＞W " the 50 seconds needed time that is about to is as the current simultaneously common setting transit time of both direction.
Then, set transit time, and utilize the exhaustive computations method to calculate in all default current matching ways current matching way the shortest when total, as current current matching way according to all; And set transit time and current current matching way is controlled traffic lights as the traffic lights parameter with each.
After this cycle, control finished, also need the information of each current direction in this cycle is deposited in the traffic lights information bank.With the reference frame of the traffic lights parameter being controlled as next time, iteration progressively thus, make each traffic lights change-over period at crossing, place that a suitable current scheme all can be provided, reduce the vehicle average latency, realization is to the current Optimal Control in crossing, reach the adaptive effect of intelligent traffic light, thereby utilized path resource more fully.
As shown in Figure 4, traffic lights control module 302 comprises: acquiring unit 3021, setup unit 3022, computing unit 3023, control module 3024 and memory module 3025, wherein:
Acquiring unit 3021, be used for from the traffic lights information bank obtain with current same direction on the vehicle fleet size corresponding historical vehicle pass-through time, average as the line time all of vehicle on current this direction;
When do not exist in the traffic lights information bank with current same direction on vehicle fleet size corresponding historical vehicle pass-through during the time, get the acquiescence transit time as vehicle transit time on current this direction.
Choose the setting transit time of transit time the longest in the transit time of vehicle of not mutual exclusion as the vehicle of described not mutual exclusion.
The embodiment of the invention realizes adaptive method of traffic lights and device, by mutex relation, all directions of each current direction of crossing being given tacit consent to transit time and being deposited in the traffic lights information bank according to all default current matching ways that mutex relation calculates, on the basis that obtains crossing, place different directions real-time traffic flow amount information, to calculating, obtain the current Best Times in crossing with historical current data under the condition; And by the mode of iteration progressively, make each traffic lights change-over period of crossing, place that a suitable current scheme all can be provided, reduced the vehicle average latency, realized the current Optimal Control in crossing, thereby utilized path resource more fully, reached the adaptive effect of intelligent traffic light.
The above only is the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or flow process conversion that utilizes instructions of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. the adaptive method of realization traffic lights is characterized in that, comprising:
Take the car flow information of obtaining in all directions preset range of crossing in real time; Described car flow information comprises wagon flow quantity and wagon flow direction;
According to car flow information, be stored in historical traffic lights information in the traffic lights information bank and default current matching way, traffic lights are controlled in the change-over period at traffic lights.
2. method according to claim 1, it is characterized in that, described according to car flow information, be stored in historical traffic lights information in the traffic lights information bank and default current matching way, the step that traffic lights are controlled is comprised in the change-over period at traffic lights:
From the traffic lights information bank, obtain with current same direction on the vehicle fleet size corresponding historical vehicle pass-through time, average as vehicle transit time on current this direction;
According to the vehicle pass-through time on all directions and the mutex relation of each current direction, be the set vehicle transit time of not mutual exclusion;
Set transit time according to each, utilize the exhaustive computations method to calculate in all default current matching ways current matching way the shortest when total, as current current matching way;
Respectively set transit time and current current matching way is controlled traffic lights with described.
3. method according to claim 2 is characterized in that, and is described according to the vehicle pass-through time on all directions and the mutex relation of each current direction, for the step of the set vehicle transit time of not mutual exclusion comprises:
Choose the setting transit time of transit time the longest in the transit time of vehicle of not mutual exclusion as the vehicle of described not mutual exclusion.
4. method according to claim 2, it is characterized in that, described according to car flow information, be stored in historical traffic lights information in the traffic lights information bank and default current matching way, the step that traffic lights are controlled is also comprised in the change-over period at traffic lights:
When do not exist in the traffic lights information bank with current same direction on vehicle fleet size corresponding historical vehicle pass-through during the time, get the acquiescence transit time as vehicle transit time on current this direction.
5. method according to claim 2 is characterized in that, the described step of traffic lights being controlled with setting transit time and current current matching way also comprises afterwards:
With current traffic lights in the change-over period information of each current direction deposit in the traffic lights information bank.
6. the adaptive device of realization traffic lights is characterized in that, comprising:
The car flow information acquisition module is used for taking in real time the car flow information of obtaining in all directions preset range of crossing; Described car flow information comprises wagon flow quantity and wagon flow direction;
The traffic lights control module is used in the change-over period traffic lights being controlled at traffic lights according to car flow information, the historical traffic lights information that is stored in the traffic lights information bank and default current matching way.
7. device according to claim 6 is characterized in that, described traffic lights control module comprises:
Acquiring unit, be used for from the traffic lights information bank obtain with current same direction on the vehicle fleet size corresponding historical vehicle pass-through time, average as the line time all of vehicle on current this direction;
Setup unit according to the vehicle pass-through time on all directions and the mutex relation of each current direction, is the set vehicle transit time of not mutual exclusion;
Computing unit is used for setting transit time according to each, utilizes the exhaustive computations method to calculate in all default current matching ways current matching way the shortest when total, as current current matching way;
Control module is used for respectively setting transit time and current current matching way is controlled traffic lights with described.
8. device according to claim 7 is characterized in that, described setup unit also is used for choosing the setting transit time of the longest transit time of the transit time of vehicle of not mutual exclusion as the vehicle of described not mutual exclusion.
9. device according to claim 7, it is characterized in that, described acquiring unit also be used for when the traffic lights information bank do not exist with current same direction on vehicle fleet size corresponding historical vehicle pass-through during the time, get the acquiescence transit time as vehicle transit time on current this direction.
10. according to the described device of claim 6-9, it is characterized in that described device also comprises:
Memory module, be used for current traffic lights in the change-over period information of each current direction deposit the traffic lights information bank in.
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| CN104040605A (en) * | 2012-01-10 | 2014-09-10 | 麻省理工学院 | Traffic signal control method and traffic signal controller |
| CN103745605A (en) * | 2013-11-20 | 2014-04-23 | 中华电信股份有限公司 | Gradual time phase method during signal time system conversion period |
| CN103745605B (en) * | 2013-11-20 | 2015-11-18 | 中华电信股份有限公司 | Gradual time phase method during signal time system conversion period |
| US8903636B1 (en) | 2013-12-02 | 2014-12-02 | Abdualrahman Abdullah Mohammad Al Kandari | Accident detection system and method for accident detection |
| CN104157155A (en) * | 2014-08-24 | 2014-11-19 | 无锡北斗星通信息科技有限公司 | Self-adaptive control system for traffic intersection signal lamps |
| CN104835333A (en) * | 2014-08-24 | 2015-08-12 | 孟洁 | Adaptive control system of traffic intersection signal lamps |
| CN105608910A (en) * | 2014-11-21 | 2016-05-25 | 中兴通讯股份有限公司 | Method, device and system for controlling traffic lights to change |
| WO2016078414A1 (en) * | 2014-11-21 | 2016-05-26 | 中兴通讯股份有限公司 | Method, apparatus and system for controlling changing of traffic lights |
| CN106408957A (en) * | 2016-11-21 | 2017-02-15 | 华南理工大学 | Intersection phase time distribution method based on pass demand balance |
| CN106408957B (en) * | 2016-11-21 | 2018-10-30 | 华南理工大学 | A kind of intersection phase time distribution method based on current demand balance |
| CN107085953A (en) * | 2017-06-06 | 2017-08-22 | 郑州云海信息技术有限公司 | A kind of Intelligent traffic management systems and method based on cloud computing |
| CN108091148A (en) * | 2018-01-26 | 2018-05-29 | 河南巡星信息科技有限公司 | Intelligent transportation apparatus and system |
| CN108133604A (en) * | 2018-02-06 | 2018-06-08 | 电子科技大学 | A kind of traffic lights dynamic realtime dispatching method based on traffic characteristic |
| CN110969879A (en) * | 2018-09-29 | 2020-04-07 | 上海博泰悦臻网络技术服务有限公司 | Automatic control method and system of traffic signal lamp |
| CN111383471A (en) * | 2018-12-27 | 2020-07-07 | 奥迪股份公司 | Traffic light countdown acquisition method and device, computer equipment and storage medium |
| CN115410391A (en) * | 2022-09-08 | 2022-11-29 | 重庆长安汽车股份有限公司 | Traffic light control method and device based on navigation, electronic equipment and storage medium |
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