CN108417039B - A kind of signalized intersections transport need evaluation method that traffic flow composition influences - Google Patents
A kind of signalized intersections transport need evaluation method that traffic flow composition influences Download PDFInfo
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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
- G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
- G08G1/0145—Measuring and analyzing of parameters relative to traffic conditions for specific applications for active traffic flow control
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention belongs to technical field of control over intelligent traffic, a kind of signalized intersections transport need evaluation method that traffic flow composition influences is suitable for main line and area road system.Consider a variety of type of vehicle and motorcade dispersion characteristic, wagon detector is respectively set in crossing inlet road stop line and its upstream section, and multiple traffic flow data collection are thus obtained, collection proposes motorcade dispersion coefficient scaling method based on these data, and then establishes transport need appraising model.In addition, giving the technical application process of above-mentioned model and method.By computer programming software MATLAB and traffic simulation software VISSIM, use case illustrates technical application process.The result shows that for the traffic flow that multiple types vehicle is constituted, new method can accurately estimate the group transport need of signalized intersections lane.
Description
Technical field
The invention belongs to technical field of control over intelligent traffic, are related to a kind of signalized intersections traffic that traffic flow composition influences
Estimated demand method.
Background technique
With the rapid development of social economy, vehicle guaranteeding organic quantity, which is continuously increased, causes Urban Traffic Jam Based increasingly tight
It is high.Intersection signal timing designing is a kind of effective way for alleviating urban traffic blocking.As the basis of signal timing optimization,
Traffic demand data accurately whether determine whether signal time distributing conception reliable.
In recent years, the research achievement both at home and abroad about transport need estimation can be concluded are as follows: (1) from macroscopically, according to quadravalence
The year traffic demand or day transport need of every section, each intersection in stage mode and OD Backstipping design estimation city road network.
Four stage models need large-scale traffic study to obtain origin and destination trip data, often expend a large amount of human and material resources and
Financial resources；Compared with the trip data of origin and destination, the road section traffic volume flow data in OD Backstipping design are easier to obtain.(2) from microcosmic
On, there is scholar that location data and ArcGIS software is combined to obtain the hour transport need in every section in city road network, can open up
Show the difference of transport need between different zones in city；There are also scholars to utilize vehicle in Road Detection device data estimation city road network
The transport need of road group and section, the time scale of estimation result are smaller than one hour, more can meticulously reflect that traffic needs
The time-varying characteristics asked.These researchs have ignored influence of the signal timing dial to link travel time mostly.
In general, transport need has stronger time-varying characteristics.For signal control, effectively to meet peak period traffic need
It asks, it is particularly important accurately to grasp its temporal behavior.For main line or area road system, the transport need in downstream inlet road is depended on
Transport need in upstream inlet road.Here entrance driveway transport need refers to that it reaches vehicle flowrate, which can be examined by setting
Section is surveyed to obtain.If detecting section to be arranged in stop line upstream compared with distant positions, because downstream process is driven towards from upstream in fleet
In can occur motorcade dispersion phenomenon, gained reaches the change curve of vehicle flowrate and the change curve of actual traffic demand is not kissed
It closes；It is arranged near stop line if detecting section, breaks because signal controls the vehicle queue length to be formed and tends to exceed to detect
Face, measured vehicle flowrate is substantially to sail out of vehicle flowrate, thus cannot reflect true transport need at this time.Work as modelled signal
When timing scheme, usually using entrance driveway actual measurement vehicle flowrate as its transport need in practice, however this way is not scientific.This
Outside, traffic flow is usually made of multiple types vehicle, and different type vehicle causes its discrete feature because of ride characteristic difference
With very big difference.In consideration of it, being directed to main line and area road system, the present invention proposes a kind of signal that traffic flow composition influences
Intersection traffic estimated demand method.
Summary of the invention
The present invention provides a kind of signalized intersections lane group transport need evaluation method towards main line and area road system,
The traffic demand data estimated can be used for signal timing optimization.
Technical solution of the present invention:
A kind of signalized intersections transport need evaluation method that traffic flow composition influences, first stops in signalized intersections entrance driveway
Only the wagon detector for obtaining each stock traffic flow data is respectively set at line and its upstream section, and is based on data acquired calibration vehicle
Team's coefficient of dispersion, then estimates the group transport need of intersection lane again, the specific steps are as follows:
(1) data set definition
A is the relational matrix of any two intersection i and i ' in road network；Α=(aii′)I×I, i, i ' ∈ { 1,2 ..., I }, I
For intersection number；When intersection i ' is adjacent with i, aii′=1, otherwise, aii′=0；
Bii′For the relational matrix of intersection i entrance driveway j and intersection i ' exit ramp k '；j∈{1,
2,…,Ji, k ' ∈ { 1,2 ..., Ki′, JiFor intersection i entrance driveway number, Ki′For intersection i ' exit ramp number；When intersection i into
When mouth road j and intersection i ' exit ramp k ' belong to same a road section, bjk′=1, otherwise, bjk′=0；
CiFor the relational matrix of intersection i inner outlet road k and wagon flow m；k∈{1,2,…,Ki, m
∈{1,2,…,Mi, Ki、MiRespectively the exit ramp number of intersection i, wagon flow number；When wagon flow m is when exit ramp k has right-of-way,
ckm=1, otherwise, ckm=0；
For the distance between intersection i ' entrance driveway j ' stop line and the upstream intersection i entrance driveway j section, j ' ∈
{1,2,…,Ji′, Ji′For intersection i ' entrance driveway number；
For the distance between intersection i ' entrance driveway j ' stop line and intersection i entrance driveway j stop line；
Desired speed when i is driven towards by intersection i ' for w class vehicle；
For the expectation from intersection i ' entrance driveway j ' stop line to the w class vehicle of the intersection upstream i entrance driveway j section
Running time,
For the desired row from intersection i ' entrance driveway j ' stop line to the w class vehicle of intersection i entrance driveway j stop line
The time is sailed,
A is integer variable,W ∈ { 1,2 ..., W }, W are type of vehicle
Number, ceil are to round up, and max is to be maximized；
T is analysis phase duration；
To pass through in intersection i wagon flow m w class vehicle all sampling intervals and stopping for period (t, t+T)
The only set of the actual vehicle number of line；
To pass through in intersection i wagon flow m w class vehicle all sampling intervals and stopping for period (t-a, t)
The only set of the actual vehicle number of line；
For for period (t-a, t+T), in intersection i wagon flow m w class vehicle all sampling intervals
Pass through the set of the actual vehicle number of stop line；
For for period (t-a, t+T), intersectionEach stock wagon flow w class vehicle all sampling intervals
The set of the interior actual vehicle number by stop line；For intersection i entrance driveway j, work as aii′=1 and bjk′When=1, note
Intersection at this timeFor the upstream intersection of entrance driveway j；
To lead in intersection i entrance driveway j w class vehicle all sampling intervals for period (t, t+T)
Cross the set of the actual vehicle number of upstream section；
To pass through in intersection i entrance driveway j w class vehicle all sampling intervals for period (t-a, t)
The set of the actual vehicle number of upstream section；
For for period (t-a, t+T), in intersection i entrance driveway j w class vehicle all sampling intervals
Pass through the set of the actual vehicle number of upstream section；
(2) Loop detector layout
Wagon detector is laid in the entrance driveway stop line of each intersection every and its upstream section, stop line and its upstream are disconnected
The maximum queue length of entrance driveway where the distance between face is greater than peak period；According toWithIt is calculatedInto
And obtain a value；Sailing out of in the per share wagon flow of the section all kinds of vehicles all sampling intervals is obtained using wagon detector at stop line
Vehicle number, i.e. data setIt is all that the section various types of vehicles is obtained using entrance driveway upstream section detector
Arrival vehicle number in sampling interval, i.e. data set
In formula: SijFor the distance between intersection i entrance driveway j upstream section and its stop line；βii′For distance coefficient, βii′
∈(0,1)；Di′,iFor the entrance driveway stop line spacing for intersection i entrance driveway j, intersection i ' and i；
(3) data processing
(3.1) detector data at stop line
Using formula (2) to data setIt is handled, obtains data set
WithUsing formula (3) to data setIt is handled, is obtainedIt is right using formula (4)
Data setIt is handled, obtains data set
In formula:For intersection i wagon flow m in period z w class
Vehicle passes through the actual vehicle number of stop line；For data sampling interval；For magnitude of traffic flow estimated intervals,ForIntegral multiple；
Mi′For the wagon flow number of intersection i '；For period (t-a, t+T) interior intersection i ' wagon flow m ' w class vehicle institute
Have in the sampling interval through the set of the actual vehicle number of stop line；ck′m′For the pass of intersection i ' inner outlet road k ' and wagon flow m '
It is identifier, when wagon flow m ' is when exit ramp k ' has right-of-way, ck′m′=1, otherwise, ck′m′=0；
(3.2) upstream section detector data
Using formula (5) to data setIt is handled, obtains data setWithUsing formula (6) to data setIt is handled, is obtained
In formula:For intersection i entrance driveway j, w class vehicle passes through the actual vehicle number of upstream section in period z；
(4) coefficient of dispersion is demarcated
To estimate transport need, need to demarcate the correction factor α in transport need appraising modelw, specific scaling method is such as
Under:
Pass through the vehicle number of upstream section using w class vehicle in formula (7) estimation period zαwIt is interval with 0.01
1 is got from 0, seeks to makeWithAverage relative error absolute value deltaijThe smallest correction factorSo
Afterwards, correction factor is obtained using the coefficient and formula (9)
In formula:For intersection i '
Wagon flow m ' is in the periodInterior w class vehicle passes through the actual vehicle number of stop line；Respectively hand over
Prong i entrance driveway j w class vehicle in period z, z-1 passes through the estimation vehicle number of upstream section；For from intersection i ' respectively into
Mouthful road stop line to the intersection upstream i entrance driveway j section w class vehicle coefficient of dispersion；αwFor the correction factor of w class vehicle, αw
∈[0,1]；For from each entrance driveway stop line of intersection i ' to the w class vehicle of the intersection upstream i entrance driveway j section when driving
Between correction factor,For from each entrance driveway stop line of intersection i ' to the w class garage of intersection i entrance driveway j stop line
The correction factor of time is sailed,Number of segment when Z is；For regulation coefficient,
(5) transport need appraising model
Utilize correction factorWith the transport need of formula (10) estimation per share wagon flow of intersection i entrance driveway j
In formula:For intersection i entrance driveway j
Wagon flow m passes through the estimation vehicle number of stop line in period z；Intersection i entrance driveway j wagon flow m is in period z-1
W class vehicle passes through the estimation vehicle number of stop line；It is intersection i ' wagon flow m ' in the periodInterior w class
Vehicle passes through the actual vehicle number of stop line；χijmFor wagon flow m ratio shared in all wagon flows of intersection i entrance driveway j；
For the coefficient of dispersion from each entrance driveway stop line of intersection i ' to the w class vehicle of intersection i entrance driveway j stop line.
Beneficial effects of the present invention: in main line and area road system, for multiple types vehicle constitute traffic flow,
The present invention can accurately estimate the group transport need of signalized intersections lane, and the transport need estimated is used for signal timing optimization
It can get good effect.
Detailed description of the invention
Fig. 1 is that schematic diagram is arranged in the crossway of the main stem group and its lane.
Fig. 2 is that schematic diagram is arranged in region intersection group and its lane, wherein equal tri- tunnel Ke Wei in each intersection, four tunnels or five tunnels
Intersection, and canalization 1 short lane of turning left, 1 left-hand rotation dedicated Lanes, 2 Through Lanes, 1 straight right side are mixed on every entrance driveway
Runway.For every entrance driveway, can without or have 1 or more the short lane of left-hand rotation or left-hand rotation dedicated Lanes, can not have
Or have 1 or 2 or more Through Lane, can also there can also be 1 or 1 or more right-hand rotation without straight right mixed runway
Dedicated Lanes.In addition, Di-1,iFor the entrance driveway stop line spacing of up direction intersection i-1 and i, Di,i+1For up direction friendship
The entrance driveway stop line spacing of prong i and i+1, Di+1,i+2Between the entrance driveway stop line of up direction intersection i+1 and i+2
Away from Di+2,i-1For the entrance driveway stop line spacing of up direction intersection i+2 and i-1.Here by being handed over west to Dong Fangxiangwei main line
The up direction of prong group is counterclockwise the up direction of region intersection group.
Fig. 3 is that schematic diagram is arranged in intersection detector, and by taking the i of intersection as an example, entrance driveway starts westerly, in the direction of the clock
It is M1, M3, M5, M7 by left turn lane group number consecutively, the straight right lane group number consecutively to conflict with it is M2, M4, M6, M8.
Detector number includes 4-digit number in figure, and the first bit digital is entrance driveway number, and west, north, east, south entrance driveway number are respectively
1,2,3,4；Second-order digit is detector location number, and when it is arranged at stop line, number is 0, is arranged in upstream section
When number be 1；Third bit digital is traffic direction number, is turned left, straight trip, directly right, flow direction of turning right number respectively 1,2,3,4,
It is 0 regardless of number when flowing to；4-digit number is serial number, is numbered from inboard to outside.For example, 1011 exist for setting
Western entrance driveway turns left the number of detector at short lane stop line.SijFor intersection i entrance driveway j upstream section and its stop line it
Between distance, entrance driveway starts westerly, in the direction of the clock j number consecutively be 1,2,3,4.To three-way intersection, entrance driveway number
Less than 4, detector will be reduced；To five tunnel intersections, entrance driveway number is more than 4, and detector will increase.
Fig. 4 is intersection signal phasing scheme schematic diagram, is made of eight phases, includes two rings and two barriers.
Fig. 5 is case intersection and its schematic diagram is arranged in lane, and 2 left-hand rotation dedicated Lanes, 1 are canalized on every entrance driveway
Through Lane, 1 straight right mixed runway, U, D are respectively upstream and downstream intersection, D hereU,DFor upstream and downstream intersection west into
Mouth road stop line spacing, SD1For the distance between the western entrance driveway upstream section of downstream intersection and its stop line.
Fig. 6 is case intersection signal phasing scheme schematic diagram, and intersection U, D are all made of the signal phase scheme.
Specific embodiment
Below in conjunction with attached drawing and technical solution, a specific embodiment of the invention is further illustrated.
1, traffic flow data obtains
Two crossing systems are constructed, each intersection channelizing scheme, signal phase scheme distinguish as shown in Figure 5,6, entrance driveway
Length is 50m, and road grade is 0, and wherein the western entrance driveway stop line spacing in upstream and downstream intersection is 600m.To intersection
U, D, west, north, east, south entrance driveway number are respectively 1,2,3,4, and west, north, east, South Exit road number are respectively 1,2,3,4；West,
North, east, the left-hand rotation of south entrance driveway, straight trip, right-hand rotation wagon flow number be respectively 11,12,13,21,22,23,31,32,33,41,42,
43.Assuming that the saturation volume rate of left turn lane, Through Lane, right-turn lane is respectively 1810,1850,1810pcu/h.Table 1 is should
The magnitude of traffic flow is preset in each crossing inlet road in system, it is assumed that consisting of 80% compact car, 10% in-between car, 10% large size
Vehicle.Table 2 is the per share wagon flow proportion in each crossing inlet road.To estimate every class vehicle in each stock wagon flow of the western entrance driveway of intersection D
Transport need for, introduce a specific embodiment of the invention.
Preset the magnitude of traffic flow in each crossing inlet road of table 1
The 2 per share wagon flow proportion in each crossing inlet road of table
2, signal time distributing conception
Table 3 gives the common period duration of signal time distributing conception, phase shows green time, intersection phase difference, respectively
Phase complete red time, yellow time are respectively 2s, 3s.
3 signal time distributing conception of table
3, coefficient of dispersion is demarcated
Analysis phase duration T=3600s is set, successively value is 1,2,3 to w, respectively represents compact car, in-between car, large car.
For signal time distributing conception shown in traffic flow data shown in table 1,2 and table 3, is simulated and handed over using traffic simulation software VISSIM
Through-flow operation conditions.In simulation model, compact car, in-between car, large car desired speed be 50km/h, DU,DFor 600m.For
Make SD1Greater than the maximum queue length of the western entrance driveway peak period intersection D, βUD2/3 is taken, S is obtainedD1=400m.According to the tool in section
Body situation, in caseTake 0.05.Assuming that simulation time is 4500s, data sampling interval5s is taken, between magnitude of traffic flow estimation
Every60s is taken,Data acquire the period as 840~4500s.Table 4
For the relational matrix of intersection U, D.For the western entrance driveway of intersection D, traffic flow data collection is obtained using metadata acquisition tool, into
And correction factor is obtained according to parameter calibration process
The relational matrix of table 4 intersection U, D
4, transport need is estimated
Entrance driveway western for intersection D is based on above-mentioned correction factor, can estimate 900~4500s of period according to formula (10)
The transport need of various types of vehicles in interior each stock wagon flow.Here using 1min as interval estimate stop line at turn left, straight trip, turn right it is small
Type vehicle, in-between car, large car arrival number, the results are shown in Table 5.
The western entrance driveway transport need of 5 intersection D of table
Claims (1)
1. a kind of signalized intersections transport need evaluation method that traffic flow composition influences, first stops in signalized intersections entrance driveway
The wagon detector for obtaining each stock traffic flow data is respectively set at line and its upstream section, and demarcates fleet based on data acquired
Then coefficient of dispersion estimates the group transport need of intersection lane, which is characterized in that specific step is as follows again:
(1) data set definition
A is the relational matrix of any two intersection i and i ' in road network；Α=(aii′)I×I, i, i ' ∈ { 1,2 ..., I }, I are to hand over
Prong number；When intersection i ' is adjacent with i, aii′=1, otherwise, aii′=0；
Bii′For the relational matrix of intersection i entrance driveway j and intersection i ' exit ramp k '；j∈{1,2,…,
Ji, k ' ∈ { 1,2 ..., Ki′, JiFor intersection i entrance driveway number, Ki′For intersection i ' exit ramp number；As intersection i entrance driveway j
When belonging to same a road section with intersection i ' exit ramp k ', bjk′=1, otherwise, bjk′=0；
CiFor the relational matrix of intersection i inner outlet road k and wagon flow m；k∈{1,2,…,Ki, m ∈
{1,2,…,Mi, Ki、MiRespectively the exit ramp number of intersection i, wagon flow number；When wagon flow m is when exit ramp k has right-of-way, ckm
=1, otherwise, ckm=0；
For the distance between intersection i ' entrance driveway j ' stop line and the upstream intersection i entrance driveway j section, j ' ∈ 1,
2,…,Ji′, Ji′For intersection i ' entrance driveway number；
For the distance between intersection i ' entrance driveway j ' stop line and intersection i entrance driveway j stop line；
Desired speed when i is driven towards by intersection i ' for w class vehicle；
To be travelled from intersection i ' entrance driveway j ' stop line to the expectation of the w class vehicle of the intersection upstream i entrance driveway j section
Time,
For from intersection i ' entrance driveway j ' stop line to the expectation of the w class vehicle of intersection i entrance driveway j stop line when driving
Between,
A is integer variable,W ∈ { 1,2 ..., W }, W are type of vehicle number,
Ceil is to round up, and max is to be maximized；
T is analysis phase duration；
To pass through stop line in intersection i wagon flow m w class vehicle all sampling intervals for period (t, t+T)
Actual vehicle number set；
To pass through stop line in intersection i wagon flow m w class vehicle all sampling intervals for period (t-a, t)
Actual vehicle number set；
To pass through in intersection i wagon flow m w class vehicle all sampling intervals and stopping for period (t-a, t+T)
The only set of the actual vehicle number of line；
For for period (t-a, t+T), intersectionLead in each stock wagon flow w class vehicle all sampling intervals
Cross the set of the actual vehicle number of stop line；For intersection i entrance driveway j, work as aii′=1 and bjk′When=1, noteAt this time
IntersectionFor the upstream intersection of entrance driveway j；
To pass through upstream in intersection i entrance driveway j w class vehicle all sampling intervals for period (t, t+T)
The set of the actual vehicle number of section；
To pass through upstream in intersection i entrance driveway j w class vehicle all sampling intervals for period (t-a, t)
The set of the actual vehicle number of section；
To pass through in intersection i entrance driveway j w class vehicle all sampling intervals for period (t-a, t+T)
The set of the actual vehicle number of upstream section；
(2) Loop detector layout
Lay wagon detector in the entrance driveway stop line of each intersection every and its upstream section, stop line and its upstream section it
Between distance be greater than peak period where entrance driveway maximum queue length；According toWithIt is calculatedAnd then it obtains
A value；It is obtained in the per share wagon flow of the section all kinds of vehicles all sampling intervals using wagon detector at stop line and sails out of vehicle number,
That is data setIt is obtained between all samplings of section various types of vehicles using entrance driveway upstream section detector
Every interior arrival vehicle number, i.e. data set
In formula: SijFor the distance between intersection i entrance driveway j upstream section and its stop line；βii′For distance coefficient, βii′∈
(0,1)；Di′,iFor the entrance driveway stop line spacing for intersection i entrance driveway j, intersection i ' and i；
(3) data processing
(3.1) detector data at stop line
Using formula (2) to data setIt is handled, obtains data setWithUsing formula (3) to data setIt is handled, is obtainedUtilize formula (4) logarithm
According to collectionIt is handled, obtains data set
In formula: For intersection i wagon flow m, w class vehicle passes through in period z
The actual vehicle number of stop line；For data sampling interval；For magnitude of traffic flow estimated intervals,For the integral multiple of a；Mi′To intersect
The wagon flow number of mouth i '；Between all samplings of period (t-a, t+T) interior intersection i ' wagon flow m ' w class vehicle
Every the set of the interior actual vehicle number by stop line；ck′m′For the relation identity of intersection i ' inner outlet road k ' and wagon flow m '
Symbol, when wagon flow m ' is when exit ramp k ' has right-of-way, ck′m′=1, otherwise, ck′m′=0；
(3.2) upstream section detector data
Using formula (5) to data setIt is handled, obtains data setWithUsing formula (6) to data setIt is handled, is obtained
In formula:For intersection i entrance driveway j, w class vehicle passes through the actual vehicle number of upstream section in period z；
(4) coefficient of dispersion is demarcated
To estimate transport need, need to demarcate the correction factor α in transport need appraising modelw, specific scaling method is as follows:
Pass through the vehicle number of upstream section using w class vehicle in formula (7) estimation period zαwIt is taken for interval from 0 with 0.01
To 1, seek to makeWithAverage relative error absolute value deltaijThe smallest correction factorThen, it utilizes
The coefficient and formula (9) obtain correction factor
In formula: For intersection i ' wagon flow m '
In the periodInterior w class vehicle passes through the actual vehicle number of stop line；Respectively intersection i into
Mouth road j w class vehicle in period z, z-1 passes through the estimation vehicle number of upstream section；To stop from each entrance driveway of intersection i '
Only line to the intersection upstream i entrance driveway j section w class vehicle coefficient of dispersion；αwFor the correction factor of w class vehicle, αw∈[0,
1]；For repairing from each entrance driveway stop line of intersection i ' to the w class vehicle running time of the intersection upstream i entrance driveway j section
Positive coefficient,For from each entrance driveway stop line of intersection i ' to the w class vehicle running time of intersection i entrance driveway j stop line
Correction factor,Number of segment when Z is；For regulation coefficient,
(5) transport need appraising model
Utilize correction factorWith the transport need of formula (10) estimation per share wagon flow of intersection i entrance driveway j
In formula: For intersection i entrance driveway j wagon flow m
Pass through the estimation vehicle number of stop line in period z；Intersection i entrance driveway j wagon flow m w class in period z-1
Vehicle passes through the estimation vehicle number of stop line；It is intersection i ' wagon flow m ' in the periodInterior w class vehicle is logical
Cross the actual vehicle number of stop line；χijmFor wagon flow m ratio shared in all wagon flows of intersection i entrance driveway j；For from
Each entrance driveway stop line of intersection i ' to intersection i entrance driveway j stop line w class vehicle coefficient of dispersion.
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| CN109754599B (en) * | 2018-12-19 | 2022-01-04 | 南京莱斯信息技术股份有限公司 | Crossing traffic state identification method based on space-time analysis |
| CN111369784A (en) * | 2018-12-25 | 2020-07-03 | 北京嘀嘀无限科技发展有限公司 | Method and device for controlling traffic flow of lane |
| CN109799729A (en) * | 2018-12-29 | 2019-05-24 | 西南交通大学 | Car networking emulation platform construction method based on VISSIM and MATLAB |
| CN111553043B (en) * | 2020-05-19 | 2023-09-26 | 北京百度网讯科技有限公司 | Traffic index calculation model test method, traffic simulation method and device |
| CN117292562B (en) * | 2023-11-23 | 2024-02-20 | 山东理工大学 | Signal control time period division method based on intersection accurate flow direction identification |
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| CN107798868A (en) * | 2017-10-17 | 2018-03-13 | 大连理工大学 | A kind of signalized intersections u-turn opening bit selecting method that traffic flow composition influences |
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