CN110111592A - Method based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme - Google Patents
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Abstract
The invention discloses a kind of methods based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme, belong to Signalized control field, the technical problem to be solved in the present invention is how to acquire information of vehicle flowrate on road in real time, carry out scheme timing designing, predicted congestion index, for the current signal time distributing conception for proposing reply in crossing, traffic flow, the technical solution of use are as follows: specific step is as follows for this method: S1, planning construction vehicle flowrate-signaling plan database are adjusted；S2, predicted congestion coefficient；S3, traffic signals scheme expert formulate traffic signal timing scheme and are deposited into vehicle flowrate-signaling plan database；S4, regular judgement is carried out to real-time traffic flow amount in any time section, matches the Optimal Signals lamp timing scheme in future time section；S5, the traffic signal timing scheme that will acquire are packaged into the scheme that signal machine platform can identify and are sent to signal machine platform, realize to the real-time dynamic regulation of the traffic lights of traffic intersection.
Description
Technical field
The present invention relates to Signalized control fields, specifically a kind of optimal based on traffic signal controlling machine Dynamic Matching
The method of signal time distributing conception.
Background technique
Domestic crossing uses the control and management of traffic signal controlling machine progress traffic signals more, according to statistics, by the end of
2018, China traffic signalization crossing ownership about 130,000.Traffic signal controlling machine is timing controlled setting
Good scheme, there is unistage type timing controlled, multisection type timing controlled etc..Timing is according to friendship used in time control method
The historical data of logical investigation is formulated, and is remained unchanged after determining until next traffic study.
Traffic police is the direct manager of road traffic control, and traffic police needs according to the wagon flow of different time, pedestrian in one day
Density sets different timing schemes in signal controlling machine in advance, in the control of the artificial progress traffic lights in crossing, and
Since profession limits, traffic control department is main in setting signal lamp timing scheme to be carried out according to control experience, according to plan implementation
The current feedback of traffic afterwards is adjusted again.Obviously being existed using traditional signal controlling machine timing controlled mode cannot
The problems such as random variation for adapting to traffic flow, lacks flexibility, poor in timeliness.Traffic signal timing scheme content is single at present, needs
Expend a large amount of human and material resources maintenance signal schemes.
In recent years, domestic to carry out urban road informatization always, cause to be greatly enriched urban highway traffic
The perception means and mode of stream.In current intelligent traffic lamp research field, also there are more and more people to propose to utilize
The means such as video acquire information of vehicle flowrate on road in real time, carry out scheme timing designing, and predicted congestion index is current for crossing
It proposes the signal time distributing conception of reply, adjusts traffic flow.Therefore information of vehicle flowrate on road how is acquired in real time, carry out scheme timing
Optimization, predicted congestion index, for the current signal time distributing conception for proposing reply in crossing, adjusting traffic flow urgent need will be solved
Technical problem.
The patent document of Patent No. CN108389403A disclose it is a kind of based on vehicle flowrate capture traffic lights and
Speed(-)limit sign intelligent adjusting method, used technical solution be include acquisition camera for collecting information of vehicle flowrate on road
And the control computer of traffic simulation software is installed and for storing traffic lights and electronic speed limit mark Adjusted Option
Cloud database server, acquisition camera acquire real-time road traffic information, be synchronized to after processing control computer in
Simulation run is carried out, the adjusting of optimal traffic lights and electronic speed limit mark is then matched according to real-time road traffic situation
Scheme, to realize the dynamic regulation to traffic lights and electronic speed limit mark.But the technical solution cannot be according to adopting in real time
The information of vehicle flowrate on road of collection carries out scheme timing designing, and predicted congestion index is matched for the current signal for proposing reply in crossing
When scheme, adjust traffic flow.
Summary of the invention
Technical assignment of the invention is to provide a kind of based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme
Method carry out scheme timing designing to solve to acquire information of vehicle flowrate on road how in real time, predicted congestion index, for
The problem of current signal time distributing conception for proposing reply in crossing, adjusting traffic flow.
Technical assignment of the invention is realized in the following manner, is based on traffic signal controlling machine Dynamic Matching Optimal Signals
The method of timing scheme, this method are to formulate traffic signal timing scheme, every bars lamp timing by traffic signals scheme expert
Corresponding regular judgment value is set in scheme, the traffic signal timing scheme of formulation is stored in vehicle flowrate-signaling plan database；
The real-time traffic flow amount that each lane is collected by road camera or vehicle GPS, to vehicle flowrate data by rule analysis judge,
Optimum signal lamp timing scheme is matched in vehicle flowrate-signaling plan database using dynamic programming algorithm；Specific steps are such as
Under:
S1, planning construction vehicle flowrate-signaling plan database；
S2, predicted congestion coefficient: information of vehicle flowrate is acquired in real time using road camera or vehicle GPS, vehicle flowrate is believed
In breath deposit vehicle flowrate-signaling plan database, according to the congestion shape at data analysis crossing in vehicle flowrate-signaling plan database
State predicts the congestion coefficient at subsequent period crossing；
S3, traffic signals scheme expert formulate traffic signal timing scheme and are deposited into vehicle flowrate-signaling plan database；
S4, regular judgement is carried out to real-time traffic flow amount in any time section, matches the optimal letter in future time section
Signal lamp timing scheme；
S5, the traffic signal timing scheme that will acquire are packaged into the scheme that signal machine platform can identify and are sent to signal
Machine platform is realized to the real-time dynamic regulation of the traffic lights of traffic intersection.
Preferably, the vehicle flowrate-signaling plan database includes flowmeter (car_flow), timing scheme table
(signal_list), signaling plan issues record sheet (send_record)；
Wherein, flowmeter is used to record the real-time traffic flow amount in each lane being collected into；
Timing scheme table is for storing traffic signal timing scheme；
Signaling plan issues record sheet and issues log for tracer signal scheme.
Preferably, the information of vehicle flowrate in the step S2 is stored in the flowmeter in vehicle flowrate-signaling plan database
In.
More preferably, specific step is as follows for predicted congestion coefficient in the step S2:
S201, the lane on crossing is redefined: is advised according to the name of crossing name-vehicle heading-number of track-lines
Then lane is named, convenient for collecting telecommunication flow information on road；
S202, the letter for acquiring vehicle flowrate on each road, pedestrian's flow in real time using road camera and vehicle GPS
Breath；Information collection is carried out using having camera on road, sorts out lane quantity, the vehicle number in each lane and crossing etc.
To pedestrian's number, save time cost, Costco Wholesale.
More preferably, redefined that specific step is as follows in the step S201 to the lane on crossing:
S20101, direction divide: being divided according to vehicle heading；Such as the top vehicle is southward travelled from north,
Then the direction in lane where the vehicle is then named as NTS；
S20102, number of track-lines definition: according to traffic simulation tool PTV vissim rule, there are two or more on a road
When number of track-lines, driveway travel directions are observed, outermost is first lane, and ecto-entad is followed successively by lane name；Such as vehicle institute
It is first lane in lane, lane where vehicle can redefine as RoadName-NTS-01.
Preferably, traffic signals scheme expert formulates traffic lights timing scheme and is deposited into wagon flow in the step S3
Timing scheme table (signal_list) in amount-signaling plan database；It wherein, include timing scheme in traffic signal timing scheme
In required cycle duration, Effective Green Time total duration, the long green light time of each sequence, the preferred time interval of scheme and scheme
Preselect Rule of judgment.
Preferably, carrying out regular judgement to real-time traffic flow amount in any time section in the step S4, match down
Specific step is as follows for the Optimal Signals lamp timing scheme of one time interval:
One S401, setting time interval range (interval), preferably 15 minutes, from vehicle flowrate-signaling plan data
According to the vehicle flowrate in lane collect statistics current time section in the flowmeter (car_flow) in library；
S402, the congestion coefficient T PI for calculating current lane: according to the lane Classifying Sum wagon flow redefined in step S2
Measure, count the current number of real-time vehicle, the passage direction of vehicle, the traffic lights ratio in lane and the speed limit in lane in each lane
Situation calculates the congestion coefficient in lane；
S403, optimal timing is matched from vehicle flowrate-signaling plan database timing scheme table (signal_list)
Scheme realizes the process of matching Optimal Signals lamp timing scheme using dynamic programming algorithm；Wherein, dynamic programming algorithm is will to ask
Topic resolves into several subproblems connected each other, and it is substantially think of of dividing and ruling that the solution by solving subproblem, which obtains the solution of former problem,
Think and solve redundancy.
More preferably, the congestion coefficient T PI that current lane is calculated in the step S402, according to what is redefined in step S2
Lane Classifying Sum vehicle flowrate, counting the current number of real-time vehicle in each lane, specific step is as follows:
S40201, the phase diagram that crossroad is fabricated to quadriphase sequence, respectively sequence group 1., sequence group 2., sequence
Group 3. with sequence group 4.；Wherein, 1. sequence group includes two lanes, the numerical nomenclature of statistics be RoadName-WTE-01 and
RoadName-WTE-02；2. sequence group includes two lanes, the numerical nomenclature of statistics be RoadName-ETW-01 and
RoadName-ETW-02；3. sequence group includes two lanes, the numerical nomenclature of statistics be RoadName-STN-01 and
4. RoadName-STN-02, sequence group include two lanes, the numerical nomenclature of statistics be RoadName-NTS-01 and
RoadName-NTS-02；1. 2. sequence group constitutes Relative sequence group 1 with sequence group, 3. 4. sequence group is constituted relatively with sequence group
Sequence group 2, each Relative sequence group corresponding standard in vehicle flowrate-signaling plan database timing scheme table are single-phase most
Big value (Std_Uniphase_Max_SequenceNo)；
S40202, each lane flow amount data processing to counting in step S40201, obtain each Relative sequence group
Practical single-phase maximum value (Ture_Uniphase_Max_SequenceNo)；The meter of the single-phase maximum value of the reality of Relative sequence group 1
It is as follows to calculate formula:
Wherein, TPI-WTE indicate western east to congestion coefficient；The congestion coefficient of TPI-ETW expression east-west direction；
The calculation formula of the single-phase maximum value of the reality of Relative sequence group 2 is as follows:
Wherein, TPI-SN indicates the congestion coefficient of North and South direction；TPI-NS indicate north south to congestion coefficient.
More preferably, dynamic programming algorithm is to ask PROBLEM DECOMPOSITION at the son that several are connected each other in the step S403
Topic, the solution by solving subproblem obtain the solution of former problem, are substantially divide and rule thought and solution redundancy, the specific steps are as follows:
S40301, according to problem condition, problem is divided into 3 stages connected each other according to spatial character；
S40302, the solution that each Relative sequence group is found out using the calculation formula of step S40202, are denoted as S (i)；
S40303, the state that is known as that NextState is converted to from a state shift, according to problem condition, state transfer side
Journey are as follows:
S (i)=(tureMax1≤std1))∩(tureMax2≤std2)∩…∩(tureMaxi≤stdi)；
Wherein, tureMaxi indicates the single-phase maximum value of reality of the calculated Relative sequence group of step S40202；Stdi table
Show the pre-selection Rule of judgment of timing scheme table (signal_list) in step S1；
S40304, it sets in one signaling plan database of vehicle flowrate and has m bars lamp timing scheme, carry out opposite sequence for the first time
There is n after the comparison of column group1Adaptation scheme, and so on, carry out having n after the t time Relative sequence group comparestAdaptation scheme uses
Dynamic Programming plans that the time complexity of this problem is O (m)+O (n1)+…+O(nt), it is matched multiple to will be greatly reduced scheme in this way
Polygamy.
Preferably, the transmission record of traffic signal timing scheme is saved in vehicle flowrate-signaling plan number in the step S5
It is issued in record sheet (send_record) according to the signaling plan in library, the traffic signal timing scheme currently issued convenient for comparison record
It whether is best.
Method based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme of the invention has the advantage that
(1), the present invention issues Optimal Signals timing side according to traffic signal controlling machine of the road real-time road to crossing
Case, can effectively avoid leads to traffic jam by signal time distributing conception is unreasonable；By establishing signal vehicle flowrate-signaling plan data
Library carries out regular anticipation to collected real-time traffic flow amount data, is matched using Dynamic Programming, obtains optimal timing scheme,
It is issued in the corresponding traffic signal controlling machine in crossing, to slow down traffic congestion；
(2), the present invention utilizes existing resource by dynamic configuration traffic signal timing scheme to greatest extent, reduces and waits
Time cost reduces the pressure of traffic police, provides road trip in time for vehicle operator and pedestrian and reminds, slows down road trip
Congestion pressure, realize safety, the rapidity, comfort of traffic flow；
(3), present invention seek to address that traffic signal timing scheme content is single at present, need to expend a large amount of human and material resources dimensions
The problems such as protecting signaling plan, this hair buys " plan all the way " principle that basis signal timing scheme issues, and dynamic adjusts in real time
Traffic Signal Timing scheme, the moment is using scheme global optimum as foundation, to effectively avoid signal time distributing conception is unreasonable from causing
Traffic jam issue.
Detailed description of the invention
The following further describes the present invention with reference to the drawings.
Attached drawing 1 is that lane information redefines schematic diagram；
Attached drawing 2 is phase key diagram；
Attached drawing 3 is Dynamic Programming Idea illustraton of model.
Specific embodiment
Referring to Figure of description and specific embodiment to of the invention based on the optimal letter of traffic signal controlling machine Dynamic Matching
The method of number timing scheme is described in detail below.
Embodiment:
Method based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme of the invention, this method is to pass through
Traffic signals scheme expert formulates traffic signal timing scheme, the corresponding regular judgment value of setting in every bars lamp timing scheme,
The traffic signal timing scheme of formulation is stored in vehicle flowrate-signaling plan database；It is collected by road camera or vehicle GPS
The real-time traffic flow amount in each lane judges vehicle flowrate data by rule analysis, using dynamic programming algorithm in vehicle flowrate-letter
Optimum signal lamp timing scheme is matched in number scheme database；Specific step is as follows:
S1, planning construction vehicle flowrate-signaling plan database；Wherein, vehicle flowrate-signaling plan database includes flowmeter
(car_flow), timing scheme table (signal_list), signaling plan issue record sheet (send_record)；Wherein, flow
Table is used to record the real-time traffic flow amount in each lane being collected into；Timing scheme table is for storing traffic signal timing scheme；Signal side
Case issues record sheet and issues log for tracer signal scheme；
S2, predicted congestion coefficient: information of vehicle flowrate is acquired in real time using road camera or vehicle GPS, vehicle flowrate is believed
In breath deposit vehicle flowrate-signaling plan database flowmeter, crossing is analyzed according to data in vehicle flowrate-signaling plan database
Congestion status, predict subsequent period crossing congestion coefficient；Specific step is as follows:
S201, the lane on crossing is redefined: is advised according to the name of crossing name-vehicle heading-number of track-lines
Then lane is named, convenient for collecting telecommunication flow information on road；As shown in Fig. 1, the specific steps are as follows:
S20101, direction divide: being divided according to vehicle heading；Such as the top vehicle is southward travelled from north,
Then the direction in lane where the vehicle is then named as NTS；
S20102, number of track-lines definition: according to traffic simulation tool PTV vissim rule, there are two or more on a road
When number of track-lines, driveway travel directions are observed, outermost is first lane, and ecto-entad is followed successively by lane name；Such as topmost
Lane where vehicle is first lane, and lane where the vehicle of the top can redefine as RoadName-NTS-01 in attached drawing 1.
S202, the letter for acquiring vehicle flowrate on each road, pedestrian's flow in real time using road camera and vehicle GPS
Breath；Information collection is carried out using having camera on road, sorts out lane quantity, the vehicle number in each lane and crossing etc.
To pedestrian's number, save time cost, Costco Wholesale.
S3, traffic signals scheme expert formulate traffic signal timing scheme and are deposited into vehicle flowrate-signaling plan database
In timing scheme table (signal_list)；Wherein, include required cycle duration in timing scheme in traffic signal timing scheme, have
Imitate the pre-selection Rule of judgment of green light total duration, the long green light time of each sequence, the preferred time interval of scheme and scheme.
S4, regular judgement is carried out to real-time traffic flow amount in any time section, matches the optimal letter in future time section
Signal lamp timing scheme；Specific step is as follows:
One S401, setting time interval range (interval), preferably 15 minutes, from vehicle flowrate-signaling plan data
According to the vehicle flowrate in lane collect statistics current time section in the flowmeter (car_flow) in library；
S402, the congestion coefficient T PI for calculating current lane: according to the lane Classifying Sum wagon flow redefined in step S2
Measure, count the current number of real-time vehicle, the passage direction of vehicle, the traffic lights ratio in lane and the speed limit in lane in each lane
Situation calculates the congestion coefficient in lane；As shown in Fig. 2, the specific steps are as follows:
S40201, the phase diagram that crossroad is fabricated to quadriphase sequence, respectively sequence group 1., sequence group 2., sequence
Group 3. with sequence group 4.；Wherein, 1. sequence group includes two lanes, the numerical nomenclature of statistics be RoadName-WTE-01 and
RoadName-WTE-02；2. sequence group includes two lanes, the numerical nomenclature of statistics be RoadName-ETW-01 and
RoadName-ETW-02；3. sequence group includes two lanes, the numerical nomenclature of statistics be RoadName-STN-01 and
4. RoadName-STN-02, sequence group include two lanes, the numerical nomenclature of statistics be RoadName-NTS-01 and
RoadName-NTS-02；1. 2. sequence group constitutes Relative sequence group 1 with sequence group, 3. 4. sequence group is constituted relatively with sequence group
Sequence group 2, each Relative sequence group corresponding standard in vehicle flowrate-signaling plan database timing scheme table are single-phase most
Big value (Std_Uniphase_Max_SequenceNo)；
S40202, each lane flow amount data processing to counting in step S40201, obtain each Relative sequence group
Practical single-phase maximum value (Ture_Uniphase_Max_SequenceNo)；The meter of the single-phase maximum value of the reality of Relative sequence group 1
It is as follows to calculate formula:
Wherein, TPI-WTE indicate western east to congestion coefficient；The congestion coefficient of TPI-ETW expression east-west direction；
The calculation formula of the single-phase maximum value of the reality of Relative sequence group 2 is as follows:
Wherein, TPI-SN indicates the congestion coefficient of North and South direction；TPI-NS indicate north south to congestion coefficient.
S403, optimal timing is matched from vehicle flowrate-signaling plan database timing scheme table (signal_list)
Scheme realizes the process of matching Optimal Signals lamp timing scheme using dynamic programming algorithm；Wherein, dynamic programming algorithm is will to ask
Topic resolves into several subproblems connected each other, and it is substantially think of of dividing and ruling that the solution by solving subproblem, which obtains the solution of former problem,
Think and solve redundancy；It is analyzed using dynamic programming algorithm thought, problem transformation model figure, as shown in Fig. 3, specific steps are such as
Under:
S40301, according to problem condition, problem is divided into 3 stages connected each other according to spatial character；
S40302, the solution that each Relative sequence group is found out using the calculation formula of step S40202, are denoted as S (i)；
S40303, the state that is known as that NextState is converted to from a state shift, according to problem condition, state transfer side
Journey are as follows:
S (i)=(tureMIax1≤std1)∩(tureMax2≤std2)∩…∩(tureMaxi≤stdi)；
Wherein, tureMaxi indicates the single-phase maximum value of reality of the calculated Relative sequence group of step S40202；Stdi table
Show the pre-selection Rule of judgment of timing scheme table (signal_list) in step S1；
S40304, it sets in vehicle flowrate-signaling plan database and has m bars lamp timing scheme, carry out opposite sequence for the first time
There is n after the comparison of column group1Adaptation scheme, and so on, carry out having n after the t time Relative sequence group comparestAdaptation scheme uses
Dynamic Programming plans that the time complexity of this problem is O (m)+O (n1)+…+O(nt), it is matched multiple to will be greatly reduced scheme in this way
Polygamy.
S5, the traffic signal timing scheme that will acquire are packaged into the scheme that signal machine platform can identify and are sent to signal
Machine platform is realized to the real-time dynamic regulation of the traffic lights of traffic intersection；Wherein, the transmission of traffic signal timing scheme, which records, protects
Vehicle flowrate-signaling plan database signaling plan is stored to issue in record sheet (send_record), it is current convenient for comparison record
Whether the traffic signal timing scheme issued is best.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. the method based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme, which is characterized in that this method is logical
It crosses traffic signals scheme expert and formulates traffic signal timing scheme, the corresponding rule judgement of setting in every bars lamp timing scheme
Value, the traffic signal timing scheme of formulation is stored in vehicle flowrate-signaling plan database；Pass through road camera or vehicle GPS
The real-time traffic flow amount for collecting each lane judges vehicle flowrate data by rule analysis, using dynamic programming algorithm in wagon flow
Optimum signal lamp timing scheme is matched in amount-signaling plan database；Specific step is as follows:
S1, planning construction vehicle flowrate-signaling plan database；
S2, predicted congestion coefficient: information of vehicle flowrate is acquired in real time using road camera or vehicle GPS, information of vehicle flowrate is deposited
In Reservoir inflow-signaling plan database, the congestion status at crossing is analyzed according to data in vehicle flowrate-signaling plan database,
Predict the congestion coefficient at subsequent period crossing；
S3, traffic signals scheme expert formulate traffic signal timing scheme and are deposited into vehicle flowrate-signaling plan database；
S4, regular judgement is carried out to real-time traffic flow amount in any time section, matches the Optimal Signals lamp in future time section
Timing scheme；
S5, the traffic signal timing scheme that will acquire are packaged into the scheme that signal machine platform can identify and are sent to semaphore and put down
Platform is realized to the real-time dynamic regulation of the traffic lights of traffic intersection.
2. the method according to claim 1 based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme,
It is characterized in that, the vehicle flowrate-signaling plan database includes that flowmeter, timing scheme table, signaling plan issue record sheet；
Wherein, flowmeter is used to record the real-time traffic flow amount in each lane being collected into；
Timing scheme table is for storing traffic signal timing scheme；
Signaling plan issues record sheet and issues log for tracer signal scheme.
3. the method according to claim 1 based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme,
It is characterized in that, in the flowmeter in information of vehicle flowrate deposit vehicle flowrate-signaling plan database in the step S2.
4. the method according to claim 1 or 3 based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme,
It is characterized in that, specific step is as follows for predicted congestion coefficient in the step S2:
S201, the lane on crossing is redefined: according to crossing name-vehicle heading-number of track-lines naming rule pair
Lane is named；
S202, the information for acquiring vehicle flowrate on each road, pedestrian's flow in real time using road camera and vehicle GPS；Make
Information collection is carried out with having camera on road, sorts out what lane quantity, the vehicle number in each lane and crossing waited
Pedestrian's number.
5. the method according to claim 4 based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme,
It is characterized in that, is redefined that specific step is as follows in the step S201 to the lane on crossing:
S20101, direction divide: being divided according to vehicle heading；
S20102, number of track-lines definition: according to traffic simulation tool PTV vissim rule, there are two or more lanes on a road
When number, driveway travel directions are observed, outermost is first lane, and ecto-entad is followed successively by lane name.
6. the method according to claim 1 based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme,
It is characterized in that, traffic signals scheme expert formulates traffic lights timing scheme and is deposited into vehicle flowrate-signal side in the step S3
Timing scheme table in case database；It wherein, include required cycle duration, Effective Green Time in timing scheme in traffic signal timing scheme
Total duration, the long green light time of each sequence, the preferred time interval of scheme and scheme pre-selection Rule of judgment.
7. the method according to claim 1 based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme,
It is characterized in that, regular judgement is carried out to real-time traffic flow amount in any time section in the step S4, matches future time area
Between Optimal Signals lamp timing scheme specific step is as follows:
One S401, setting time interval range, summarize system according to lane from vehicle flowrate-signaling plan database flowmeter
Count the vehicle flowrate in current time section；
S402, the congestion coefficient T PI for calculating current lane: according to the lane Classifying Sum vehicle flowrate redefined in step S2,
Count the current number of real-time vehicle, the passage direction of vehicle, the traffic lights ratio in lane and the speed limit feelings in lane in each lane
Condition calculates the congestion coefficient in lane；
S403, optimal timing scheme is matched from vehicle flowrate-signaling plan database timing scheme table, using Dynamic Programming
Algorithm realizes the process of matching Optimal Signals lamp timing scheme；Wherein, dynamic programming algorithm is by PROBLEM DECOMPOSITION into several phases
The subproblem mutually contacted, the solution by solving subproblem obtain the solution of former problem, are substantially divide and rule thought and solution redundancy.
8. the method according to claim 7 based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme,
It is characterized in that, the congestion coefficient T PI of current lane is calculated in the step S402, according to the lane redefined in step S2 point
Class summarizes vehicle flowrate, and counting the current number of real-time vehicle in each lane, specific step is as follows:
S40201, the phase diagram that crossroad is fabricated to quadriphase sequence, respectively sequence group 1., sequence group 2., sequence group 3.
4. with sequence group；Wherein, 1. sequence group includes two lanes, the numerical nomenclature of statistics be RoadName-WTE-01 and
RoadName-WTE-02；2. sequence group includes two lanes, the numerical nomenclature of statistics be RoadName-ETW-01 and
RoadName-ETW-02；3. sequence group includes two lanes, the numerical nomenclature of statistics be RoadName-STN-01 and
4. RoadName-STN-02, sequence group include two lanes, the numerical nomenclature of statistics be RoadName-NTS-01 and
RoadName-NTS-02；1. 2. sequence group constitutes Relative sequence group 1 with sequence group, 3. 4. sequence group is constituted relatively with sequence group
Sequence group 2, each Relative sequence group corresponding standard in vehicle flowrate-signaling plan database timing scheme table are single-phase most
Big value；
S40202, each lane flow amount data processing to counting in step S40201, obtain the reality of each Relative sequence group
Single-phase maximum value；The calculation formula of the single-phase maximum value of the reality of Relative sequence group 1 is as follows:
Wherein, TPI-WTE indicate western east to congestion coefficient；The congestion coefficient of TPI-ETW expression east-west direction；
The calculation formula of the single-phase maximum value of the reality of Relative sequence group 2 is as follows:
Wherein, TPI-SN indicates the congestion coefficient of North and South direction；TPI-NS indicate north south to congestion coefficient.
9. the method according to claim 7 or 8 based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme,
It is characterized in that, dynamic programming algorithm is connect PROBLEM DECOMPOSITION at several each other subproblem in the step S403, lead to
The solution for crossing solution subproblem obtains the solution of former problem, is substantially divide and rule thought and solution redundancy, the specific steps are as follows:
S40301, according to problem condition, problem is divided into 3 stages connected each other according to spatial character；
S40302, the solution that each Relative sequence group is found out using the calculation formula of step S40202, are denoted as S (i)；
S40303, the state that is known as that NextState is converted to from a state shift, according to problem condition, state transition equation
Are as follows:
S (i)=(tureMax1≤std1)∩(tureMax2≤std2)∩…∩(tureMaxi≤stdi)；
Wherein, tureMaxi indicates the single-phase maximum value of reality of the calculated Relative sequence group of step S40202；Stdi indicates step
The pre-selection Rule of judgment of timing scheme table in rapid S1；
S40304, it sets in vehicle flowrate-signaling plan database and has m bars lamp timing scheme, carry out first time Relative sequence group
There is n after comparison1Adaptation scheme, and so on, carry out having n after the t time Relative sequence group comparestAdaptation scheme uses dynamic
Planning plans that the time complexity of this problem is O (m)+O (n1)+…+O(nt)。
10. the method according to claim 1 based on traffic signal controlling machine Dynamic Matching Optimal Signals timing scheme,
It is characterized in that, the transmission record of traffic signal timing scheme is saved in vehicle flowrate-signaling plan database letter in the step S5
Number scheme issues in record sheet, and whether the traffic signal timing scheme currently issued convenient for comparison record is best.
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