CN108447263A - The signal of Arterial Coordination Control intersection based on Floating Car controls evaluation method - Google Patents
The signal of Arterial Coordination Control intersection based on Floating Car controls evaluation method Download PDFInfo
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- CN108447263A CN108447263A CN201810348858.5A CN201810348858A CN108447263A CN 108447263 A CN108447263 A CN 108447263A CN 201810348858 A CN201810348858 A CN 201810348858A CN 108447263 A CN108447263 A CN 108447263A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
- G08G1/0112—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from the vehicle, e.g. floating car data [FCD]
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Abstract
The signal of the present invention provides a kind of Arterial Coordination Control intersection based on Floating Car controls evaluation method.This method includes：Obtain the track data of the latitude and longitude coordinates and satellite positioning electronic map data and each Floating Car of Arterial Coordination Control intersection；Segment processing is carried out to the stroke distances in initial position to the final position of Floating Car, timesharing calculates the average speed of Floating Car tracing point in per segment distance, the speed time-space distribution graph for drawing Floating Car evaluates the congestion location and time of Arterial Coordination Control intersection according to speed time-space distribution graph；The evaluation index of Arterial Coordination Control intersection is calculated according to the track data of Floating Car, and then evaluates the signal control effect of Arterial Coordination Control intersection.The method of the present invention has the advantages that use manpower and material resources sparingly compared with artificial investigation, intuitively judges that congestion period, congestion distance and resolution time are often sent out in Arterial Coordination Control intersection by speed time-space distribution graph, has practicability and good application prospect.
Description
Technical field
The present invention relates to technical field of traffic control more particularly to a kind of Arterial Coordination Control intersections based on Floating Car
Signal control evaluation method.
Background technology
With the fast development of floating car technology, intelligent transportation field increasingly be unable to do without the support of floating car data and complete
It is kind.Because floating car technology has the characteristics that accuracy, real-time, stability, it is widely used in the signal control of urban transportation
The various aspects such as system, flow monitoring, congestion detection.However, the Arterial Coordination Control intersection evaluation method based on Floating Car is also
It is not yet ripe
Currently, when Arterial Coordination Control intersection evaluation method in the prior art mainly utilizes stop frequency, total parking
Between, the indexs such as average speed, without considering other indexs, such as delay time at stop and flow etc..And the delay time at stop is than total parking
Time can more reflect that arterial traffic state and intersection coordinate control situation.
Invention content
The signal control evaluation of the embodiment provides a kind of Arterial Coordination Control intersection based on Floating Car
Method, the shortcomings that with the customer service prior art.
A kind of signal control evaluation method of the Arterial Coordination Control intersection based on Floating Car, including：
The latitude and longitude coordinates and satellite positioning electronic map data of Arterial Coordination Control intersection are obtained, and are located at main line
Coordinate the track data of each Floating Car in control intersection service range；
Segment processing carried out to the stroke distances of the initial position of the Floating Car to final position, timesharing calculate every section away from
Average speed from interior Floating Car tracing point draws the speed time-space distribution graph of Floating Car, when according to the speed of the Floating Car
Space division Butut evaluates the congestion location and time of the Arterial Coordination Control intersection；
The evaluation index that the Arterial Coordination Control intersection is calculated according to the track data of each Floating Car, according to described
Evaluation index evaluates the signal control effect of the Arterial Coordination Control intersection.
Further, the latitude and longitude coordinates and satellite positioning electronic map number for obtaining Arterial Coordination Control intersection
According to, and each Floating Car in the service range of Arterial Coordination Control intersection track data, including：
The latitude and longitude coordinates and satellite communication electronic map for obtaining the Arterial Coordination Control intersection of WGS-84 coordinate systems, are obtained
Take the track data of the workaday Floating Car of at least seven of WGS-84 coordinate systems, the transmitting pin of the track data of the Floating Car
Rate is not less than 0.33HZ；
Screening Treatment is carried out to the track data of the Floating Car, is specifically included：
(1) the overall longitude and latitude range of Arterial Coordination Control intersection is determined, Floating Car within this range is grown in screening
Track data；
(2) it filters out Floating Car direction and differs rail between ± 45 ° with the trunk roads direction of Arterial Coordination Control intersection
Mark data reject the track data beyond this direction scope；
(3) it is more than 10% or more the limitation speed upper bound with the trunk roads of Arterial Coordination Control intersection to reject GPS velocity
Floating Car track data；
(4) satellite communication electronic map match is carried out to the track data of Floating Car, obtains tracing point in Trunk Road Coordination control
The positional distance of intersection processed, the positional distance according to tracing point in Arterial Coordination Control intersection reject position and deviate major trunk roads
The data of set distance range.
Further, the track data to Floating Car carries out satellite communication electronic map match, obtains tracing point
Positional distance in Arterial Coordination Control intersection, including：
The position in the matched section of each tracing point and section is determined according to satellite communication electronic map, is handed over from coordination
The section initial position that the starting point of prong starts to be matched to tracing point is terminated, and the road section length of process is added, and adds rail
The section initial position that mark point is matched to obtains the tracing point and intersects in Arterial Coordination Control to the length of tracing point matching position
The positional distance of mouth, is stored in as new variables in track data using apart from variable.
Further, the stroke distances in the initial position to the Floating Car to final position carry out at segmentation
Reason, timesharing calculate the average speed of Floating Car tracing point in per segment distance, draw the speed time-space distribution graph of Floating Car, including：
The stroke distances in initial position to the final position of Arterial Coordination Control intersection are divided according to the interval of 10m
Section processing, traverses the tracing point after all screenings, classifies according to two kinds of dimensions of time and distance, when calculating identical in segmentation
Interior Floating Car average speed, obtains speed space-time matrix, and speed is drawn using graphics software according to the speed space-time matrix
Time-space distribution graph is spent, the speed space-time matrix column element is to coordinate intersection each position speed in same time, and row element is
Coordinate speed in the same position different time of intersection, the speed time-space distribution graph abscissa represents the time, and ordinate represents
Distance, each row represent the variation tendency for coordinating intersection each position speed in same time, are represented per a line and coordinate intersection
The variation tendency of speed in same position different time, the deeper representation speed of color is smaller, and color is more shallow, and representation speed is bigger.
Further, the track data according to each Floating Car calculates commenting for Arterial Coordination Control intersection
Valence index, including：
(1) when calculating the not parking average stroke spent by Arterial Coordination Control intersection of t moment each Floating Car
Between Tt；
(2) the average travel time T that each Floating Car of t moment is spent by Arterial Coordination Control intersection is calculatedTotal t；
(3) according to formula Dt=TTotal t-TtEach Floating Car of t moment is calculated from starting point by Arterial Coordination Control intersection to end
Point mean delay time Dt；
(4) t moment stop frequency n is calculatedt；
(5) i-th of Arterial Coordination Control intersection t moment flow V is calculatedit；
(6) according to formulaCalculate the evaluation index of Arterial Coordination Control intersection.
I (α, β, t), α, β are the parameter artificially adjusted, are used for the variables such as Controlled drug-release time and stop frequency in index
Shared ratio.
Further, i-th of Arterial Coordination Control intersection t moment flow V of the calculatingit, including：
Virtual coordinate range region, the seat are respectively set in the major trunk roads upstream of Arterial Coordination Control intersection and downstream
The length for marking range areas is not less than L=Δs tVmax, wherein Δ t is the tracing point time interval of Floating Car, VmaxFor Floating Car
Maximum speed；
If the tracing point of Floating Car first passes through the coordinate range region of upstream in t moment, then the coordinate model for passing through downstream
Region is enclosed, then calculates t moment current Arterial Coordination Control intersection one time flow；
The track data for traversing all Floating Cars obtains the flow of all Arterial Coordination Control intersections of all moment.
Further, the signal that the Arterial Coordination Control intersection is evaluated according to the evaluation index controls effect
Fruit, including：
Calculated evaluation index I (α, β, t) is compared with preset evaluation index threshold range, according to than
Relatively result obtains the signal control evaluation result of Arterial Coordination Control intersection, which controls evaluation result according to Trunk Road Coordination
The delay of control intersection is classified than the different numerical value with parking rate.
By embodiments of the invention described above provide technical solution it can be seen from the embodiment of the present invention propose based on floating
The signal control evaluation method of the Arterial Coordination Control intersection of vehicle has the advantages that use manpower and material resources sparingly compared with artificial investigation,
When intuitively judging that Arterial Coordination Control intersection often sends out congestion period, congestion distance and dissipates by speed time-space distribution graph
Between, have practicability and good application prospect.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without having to pay creative labor, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is that a kind of signal control of Arterial Coordination Control intersection based on Floating Car provided in an embodiment of the present invention is commented
The process chart of valence method；
Fig. 2 is a kind of speed time-space distribution graph of Arterial Coordination Control intersection provided in an embodiment of the present invention.
Specific implementation mode
For ease of the understanding to the embodiment of the present invention, done further by taking several specific embodiments as an example below in conjunction with attached drawing
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
Operation and Arterial Coordination Control intersection is commented according to fining is carried out to indexs such as delays using Floating Car
Estimate this target, the embodiment of the present invention carries out fining operation to indexs such as delays using Floating Car and proposes new Trunk Road Coordination
Control intersection evaluation method.This method utilizes big data Processing Algorithm, draws Arterial Coordination Control in Floating Car one day and intersects
Mouth speed time-space distribution graph, and Calculation Estimation index.
A kind of signal of Arterial Coordination Control intersection based on Floating Car provided in an embodiment of the present invention controls evaluation side
The process flow of method is as shown in Figure 1, include following processing step：
Step S1：Data preparation.
The latitude and longitude coordinates of each intersection in Arterial Coordination Control intersection and include Arterial Coordination Control intersection
GPS electronic maps should select WGS-84 coordinate systems.In order to reduce error, high frequency floating car data transmission frequency is not lower than
0.33HZ (3s transmission primaries), should select the workaday track data of at least seven on the time.
Step S2：Floating car data screens and processing.
Floating car data is typically all GCJ-02 coordinate systems, it is therefore desirable to be turned GCJ-02 coordinate systems using coordinate transformation method
Turn to WGS-84 coordinate systems.
Data screening needs following steps：
(1) determine that the overall longitude and latitude range of Arterial Coordination Control intersection, screening grow track number within this range
According to；
(2) because evaluating Arterial Coordination Control intersection, it is only necessary to retain continuous straight trip data, reject and turn to number
According to therefore, screening Floating Car direction differs the track data between ± 45 ° with trunk roads direction, to the rail beyond direction scope
Mark is rejected；
(3) data that GPS velocity is more than 10% or more the trunk roads limitation speed upper bound are rejected；
(4) to track data carry out map match obtain the tracing point Arterial Coordination Control intersection positional distance,
Positional distance according to tracing point in Arterial Coordination Control intersection rejects the data for deviateing major trunk roads set distance range in position.
Tracing point includes following steps in the computational methods of the positional distance of Arterial Coordination Control intersection：(1) lead to
Cross the position in the section and section that map match determines that each tracing point is matched to；(2) it is opened from the starting point for coordinating intersection
The section initial position for beginning to be matched to tracing point is terminated, and the road section length of process is added, is matched to along with tracing point
Section initial position to the length of tracing point matching position, obtain the tracing point Arterial Coordination Control intersection position away from
From being stored in track data as new variables using apart from variable.
Step S3：Draw the speed time-space distribution graph of Arterial Coordination Control intersection.
The stroke distances in initial position to the final position of Arterial Coordination Control intersection are divided according to the interval of 10m
Section processing.The tracing point after all screenings is traversed, classifies according to two kinds of dimensions of time and distance, finally calculates same distance
Floating Car average speed in same time, obtains speed space-time matrix.According to speed space-time matrix, MATLAB softwares are utilized
Chart draw speed time-space distribution graph.Fig. 2 is a kind of speed of Arterial Coordination Control intersection provided in an embodiment of the present invention
Time-space distribution graph is spent, speed time-space distribution graph abscissa represents the time, and ordinate represents distance, and each row represent in same time
The variation tendency for coordinating intersection each position speed represents the change for coordinating speed in the same position different time of intersection per a line
Change trend, the deeper representation speed of color is smaller, and color is more shallow, and representation speed is bigger.By speed time-space distribution graph, intuitively evaluation is dry
Position, time and the congestion distance that the working day congestion of signal coordination control intersection occurs.
Step S4：Calculate the evaluation index of Arterial Coordination Control intersection.
Including following steps：
(1) the not parking average travel time T spent by Arterial Coordination Control intersection of t moment each car is calculatedt；
(2) the average travel time T that t moment each car is spent by Arterial Coordination Control intersection is calculatedTotal t；
(3) according to formula Dt=TTotal t-TtT moment each car is calculated to put down to terminal by Arterial Coordination Control intersection from starting point
Equal delay time at stop Dt；
(4) t moment stop frequency n is calculatedt；
(5) i-th of Arterial Coordination Control intersection t moment flow V is calculatedit；
Virtual coordinate range region, the seat are respectively set in the major trunk roads upstream of Arterial Coordination Control intersection and downstream
The length for marking range areas is not less than L=Δs tVmax, wherein Δ t is the tracing point time interval of Floating Car, VmaxFor Floating Car
Maximum speed,
If the tracing point of Floating Car first passes through the coordinate range region of upstream in t moment, then the coordinate model for passing through downstream
Region is enclosed, then calculates t moment current Arterial Coordination Control intersection one time flow；
The track data for traversing all Floating Cars obtains the flow of all Arterial Coordination Control intersections of all moment.
(6) according to formulaCalculate the evaluation index of Arterial Coordination Control intersection.
I (α, β, t), α, β are the parameter that can be adjusted, and are used for the variables such as Controlled drug-release time and stop frequency in index
Shared ratio.
Step S5：Evaluation index is exported, Optimizing Suggestions are provided.
(1) evaluation index is exported.Because calculated evaluation index I (α, β, t) is numerical value, observation decision should not be carried out.
Therefore, calculated evaluation index I (α, β, t) is compared with preset evaluation index threshold range, according to comparing
As a result the signal control evaluation result of Arterial Coordination Control intersection is obtained, which controls evaluation result according to Trunk Road Coordination control
The delay of intersection processed is classified than the different numerical value with parking rate.
Evaluation result includes following five type：
The signal control effect of the first class of the representation Arterial Coordination Control intersection is very good, and when parking rate is very low for delay,
Green wave effect can obviously be experienced；
The signal control effect of the second class of the representation Arterial Coordination Control intersection is preferable, and when parking rate is relatively low for delay,
Green wave effect can be experienced, but centre has parking；
Third class indicates that the signal control effect of Arterial Coordination Control intersection is medium, there is certain delay ratio and parking
Rate, green wave effect is general, unobstructed compared with ordinary road；
4th class indicates that the signal control effect of Arterial Coordination Control intersection is poor, and delay is higher than with parking rate, does not have
There is green wave effect；
5th class indicates that the signal control effect of Arterial Coordination Control intersection is very poor, and delay is very higher than with parking rate, letter
Number timing hinders normal traffic to pass through.
(2) Optimizing Suggestions are provided.This algorithm can intuitively judge that Arterial Coordination Control is handed over by speed time-space distribution graph
Normal hair congestion period, congestion distance and the resolution time of prong.In conjunction with the evaluation index of output, if the delay time at stop is larger,
It is recommended to increase the green wave times；If stop frequency is excessive, it is recommended that optimization intersection phase setting etc..
In conclusion the signal control for the Arterial Coordination Control intersection based on Floating Car that the embodiment of the present invention proposes is commented
Valence method has the advantages that use manpower and material resources sparingly compared with artificial investigation, intuitively judges that main line is assisted by speed time-space distribution graph
Congestion period, congestion distance and resolution time are often sent out in regulation and control intersection processed, have practicability and good application prospect.
Since the evaluation index input variable in the method for the embodiment of the present invention both is from the satellite maps electron number such as GPS
According to, therefore also with good stability and accuracy.There is the parameter that can be adjusted to control variable weight in evaluation algorithms,
Therefore also there is certain flexibility.
One of ordinary skill in the art will appreciate that：Attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Flow is not necessarily implemented necessary to the present invention.
One of ordinary skill in the art will appreciate that：The module in equipment in embodiment can describe to divide according to embodiment
It is distributed in the equipment of embodiment, respective change can also be carried out and be located in one or more equipment different from the present embodiment.On
The module for stating embodiment can be merged into a module, can also be further split into multiple submodule.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
Subject to.
Claims (7)
1. a kind of signal of Arterial Coordination Control intersection based on Floating Car controls evaluation method, which is characterized in that including：
The latitude and longitude coordinates and satellite positioning electronic map data of Arterial Coordination Control intersection are obtained, and are located at Trunk Road Coordination
Control the track data of each Floating Car in the service range of intersection；
Segment processing is carried out to the stroke distances in initial position to the final position of the Floating Car, timesharing calculates in per segment distance
The average speed of Floating Car tracing point draws the speed time-space distribution graph of Floating Car, according to space division when the speed of the Floating Car
Butut evaluates the congestion location and time of the Arterial Coordination Control intersection；
The evaluation index that the Arterial Coordination Control intersection is calculated according to the track data of each Floating Car, according to the evaluation
The signal control effect of Arterial Coordination Control intersection described in metrics evaluation.
2. according to the method described in claim 1, it is characterized in that, the longitude and latitude for obtaining Arterial Coordination Control intersection
Coordinate and satellite positioning electronic map data, and each Floating Car in the service range of Arterial Coordination Control intersection
Track data, including：
The latitude and longitude coordinates and satellite communication electronic map of the Arterial Coordination Control intersection of WGS-84 coordinate systems are obtained, are obtained
The track data of the workaday Floating Car of at least seven of WGS-84 coordinate systems, the transmission frequency of the track data of the Floating Car
Not less than 0.33HZ；
Screening Treatment is carried out to the track data of the Floating Car, is specifically included：
(1) determine that the overall longitude and latitude range of Arterial Coordination Control intersection, screening grow the track of Floating Car within this range
Data；
(2) it filters out Floating Car direction and differs track number between ± 45 ° with the trunk roads direction of Arterial Coordination Control intersection
According to being rejected to the track data beyond this direction scope；
(3) it is more than floating with 10% or more the limitation speed upper bound of the trunk roads of Arterial Coordination Control intersection to reject GPS velocity
The track data of motor-car；
(4) satellite communication electronic map match is carried out to the track data of Floating Car, obtains tracing point and is handed in Arterial Coordination Control
The positional distance of prong, the positional distance according to tracing point in Arterial Coordination Control intersection reject position and deviate major trunk roads setting
The data of distance range.
3. according to the method described in claim 2, it is characterized in that, the track data to Floating Car carries out satellite communication
Electronic map match, obtain tracing point Arterial Coordination Control intersection positional distance, including：
The position in the matched section of each tracing point and section is determined according to satellite communication electronic map, from coordination intersection
The starting point section initial position that starts to be matched to tracing point terminate, the road section length of process is added, tracing point is added
The section initial position being matched to obtains the tracing point in Arterial Coordination Control intersection to the length of tracing point matching position
Positional distance is stored in as new variables in track data using apart from variable.
4. according to the method described in claim 3, it is characterized in that, the initial position to the Floating Car to terminal position
The stroke distances set carry out segment processing, and timesharing calculates the average speed of Floating Car tracing point in per segment distance, draws Floating Car
Speed time-space distribution graph, including：
The stroke distances in initial position to the final position of Arterial Coordination Control intersection are carried out according to the interval of 10m at segmentation
Reason, traverses the tracing point after all screenings, classifies according to two kinds of dimensions of time and distance, calculates in segmentation in same time
Floating Car average speed, obtain speed space-time matrix, according to the speed space-time matrix using graphics software draw speed when
Space division Butut, the speed space-time matrix column element are to coordinate intersection each position speed in same time, and row element is to coordinate
Speed in the same position different time of intersection, the speed time-space distribution graph abscissa represent the time, and ordinate represents distance,
Each row represent the variation tendency for coordinating intersection each position speed in same time, are represented per a line and coordinate the same position in intersection
The variation tendency of speed in different time is set, the deeper representation speed of color is smaller, and color is more shallow, and representation speed is bigger.
5. according to the method described in claim 4, it is characterized in that, described calculate institute according to the track data of each Floating Car
The evaluation index of Arterial Coordination Control intersection is stated, including：
(1) the not parking average travel time T spent by Arterial Coordination Control intersection of each Floating Car of t moment is calculatedt；
(2) the average travel time T that each Floating Car of t moment is spent by Arterial Coordination Control intersection is calculatedTotal t；
(3) according to formula Dt=TTotal t-TtEach Floating Car of t moment is calculated to put down to terminal by Arterial Coordination Control intersection from starting point
Equal delay time at stop Dt；
(4) t moment stop frequency n is calculatedt；
(5) i-th of Arterial Coordination Control intersection t moment flow V is calculatedit；
(6) according to formulaCalculate the evaluation index of Arterial Coordination Control intersection.
I (α, β, t), α, β are the parameter artificially adjusted, and it is shared in index to be used for the variables such as Controlled drug-release time and stop frequency
Ratio.
6. according to the method described in claim 5, it is characterized in that, when described i-th of Arterial Coordination Control intersection t of calculating
Carve flow Vit, including：
Virtual coordinate range region is respectively set in the major trunk roads upstream of Arterial Coordination Control intersection and downstream, the coordinate model
The length for enclosing region is not less than L=Δs tVmax, wherein Δ t is the tracing point time interval of Floating Car, VmaxMost for Floating Car
Big speed；
If the tracing point of Floating Car first passes through the coordinate range region of upstream in t moment, then the coordinate range area for passing through downstream
Domain then calculates t moment current Arterial Coordination Control intersection one time flow；
The track data for traversing all Floating Cars obtains the flow of all Arterial Coordination Control intersections of all moment.
7. according to the method described in claim 5 or 6, which is characterized in that described according to described in evaluation index evaluation
The signal control effect of Arterial Coordination Control intersection, including：
Calculated evaluation index I (α, β, t) is compared with preset evaluation index threshold range, is tied according to comparing
Fruit obtains the signal control evaluation result of Arterial Coordination Control intersection, which controls evaluation result according to Arterial Coordination Control
The delay of intersection is classified than the different numerical value with parking rate.
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