CN105788301B - The pre- stop line in piggybacking left-hand rotation intersection and pre-signal method to set up - Google Patents
The pre- stop line in piggybacking left-hand rotation intersection and pre-signal method to set up Download PDFInfo
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- G—PHYSICS
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Abstract
The present invention relates to a kind of pre- stop line in piggybacking left-hand rotation intersection and pre-signal method to set up, for the signalized crossing to be turned left using piggybacking, its distinctive pre- stop line and pre-signal are set and carry out integrated optimization, on the basis of current safety is ensured, improves the traffic capacity；The optimal design-aside method using Maximum Traffic Capacity as optimization aim, consider queue length, vehicle empty with the constraints such as Optimal Parameters span, establish linear programming model and optimize.The key parameter that the distinctive pre- stop line in piggybacking left-hand rotation intersection and pre-signal are set can be incorporated into a unified Optimized model by this method, synchronize optimization, so as to give full play to piggybacking left-hand rotation intersection efficiency, alleviate traffic congestion.
Description
Technical field
The present invention relates to a kind of traffic signalization intersection parking line, signal timing dial method to set up, more specifically, relate to
And a kind of pre- stop line in piggybacking left-hand rotation intersection and pre-signal method to set up.
Background technology
Level-crossing is the bottleneck node of urban highway traffic, in order to improve the utilization ratio of intersection time-space distribution,
One kind is suggested using the non-general intersection of " piggybacking left-hand rotation ".However, current design method mainly continues to use general closed planar friendship
The design method of prong, for the distinctive pre- stop line in piggybacking left-hand rotation intersection and the main by virtue of experience value of pre-signal, have no
Targetedly optimal design-aside method, and the patent of invention of this kind of method is not retrieved yet.
Find there is the Optimization Design of OFF signal control plane intersection, mainly through the literature search to prior art
Have following several：
1st, conventional signalized crossing geometry designs.Specifically include the design of intersection parking line position, lane function
Division, the design of intersection expanded segment length etc..China《Urban road intersection planning specification GB50647-2011》、《City
Road engineering design specification CJJ 37-2012》、《Urban road intersection design discipline CJJ 152-2010》In have correlation to it
Regulation.
2nd, conventional signalized crossing signal control.Specifically include signal phase phase sequence, cycle duration, respectively flow to it is green
Lamp time distribution etc..Include in the basic stock of China《Urban traffic control》、《Traffic administration and control》.
3rd, piggybacking left-hand rotation intersection is designed.Piggybacking left-hand rotation intersection is a kind of unconventional intersection design method, and it will
The subregion of exit lane is arranged to integrated functional zonation, using pre-signal control, by integrated functional zonation the signal period not
Used with the stage as exit lane or import left turn lane, extra right of way is provided for left-turning traffic, so as to improve intersection
The traffic capacity.The design method is in a kind of application for a patent for invention " traffic indication system and control that crossroad piggybacking turns left
It is described in method " (application number 201510675428.0)；" piggybacking is to the intersection turned left to exit ramp for application for a patent for invention
Its traffic organization and signal timing dial are carried out in mouth traffic organization and signal timing dial method " (application number 201410276115.3)
Introduce；And (http is applied in Hebei Handan according to Sina's network information, piggybacking left-hand rotation intersection://
news.sina.com.cn/c/p/2014-05-16/165130151057.shtml)。
Method 1 and method 2 are the design methods for normal signal control intersection, be there has been at present more ripe
Technological achievement.
Method 3 proposes this intersection type of piggybacking left-hand rotation, by using the dynamic of exit lane, can improve intersection
The traffic capacity of mouth.In intersection upstream, pre- stop line is set and it is carried out pre-signal control be the intersection type it is different with
Normal signal controls the key Design content of intersection.But the design method for the signalized crossing that mainly follows conventional lines at present,
Pre- parking line position and pre-signal timing design are carried out successively.Wherein, pre- stop line is typically used in method 1《Urban road is handed over
Prong planning specification GB50647-2011》Midplane crossing inlet road broadening segment length value, application for a patent for invention
Rule of thumb suggest taking 30-60m in 201410276115.3；Pre-signal control typically uses intersection main signal phase in method 2
Same timing method, is mainly carried in application for a patent for invention 201410276115.3 and 201510675428.0 in terms of signal phase
Go out corresponding requirements.
Traditional design methods do not consider that pre- parking line position, pre-signal timing, intersection main signal are mutually closed with the time
Connection, do not recognize that pre- stop line and the pre-signal setting of piggybacking left-hand rotation intersection have following contradiction：From queue length about beam angle
Degree sees that pre- stop line should be the bigger the better with intersection parking line spacing, can accommodate more vehicles, improves operational efficiency；But from
Vehicle empties constraint angle and sees that pre- stop line should be the smaller the better with intersection parking line spacing, can reduce vehicle clean up time, carry
High operational efficiency.Therefore, prior art lack for pre- stop line and pre-signal control specific to piggybacking left-hand rotation intersection compared with
For scientific and reasonable method to set up.
The content of the invention
The defects of for prior art, the invention aims to provide the pre- stop line in a kind of piggybacking left-hand rotation intersection and pre-
Signal method to set up, above-mentioned contradiction of this method for piggybacking left-hand rotation intersection in pre- stop line and pre-signal are set, by it
Pre- parking line position and pre-signal timing key parameter are incorporated into a unified Optimized model, synchronize optimization, so as to
The traffic capacity is improved on the basis of current safety is ensured.
Technical scheme is as follows：
A kind of pre- stop line in piggybacking left-hand rotation intersection and pre-signal method to set up, it is synchronous by solving following Optimized models
The pre- parking line position of optimization and pre-signal timing.Optimized model is stated with linear programming model, using Maximum Traffic Capacity as excellent
Change target, and consider queue length, vehicle empty with Optimal Parameters span constraints, wherein：
The input parameter of the Optimized model includes：sp, the saturation volume rate of piggybacking left turn lane is entered at pre- stop line,
veh/h；sI, saturation volume rate of the piggybacking left turn lane at intersection parking line, veh/h；N, piggybacking left turn lane number, bar；CI,
Main signal cycle duration, s；gI, main signal left-hand rotation green light start time, s；λI, main signal left-hand rotation split；rI', study into
The right side import main signal left-hand rotation red light start time of mouth, s；V, average speed, m/s；vmin, minimum speed, m/s；vw, it is lined up
Evanescent wave velocity of wave, m/s；D, the average headstock Ullage of queuing vehicle, m；δ, safe time interval, s；
The output parameter of the Optimized model includes：L, pre- stop line and intersection parking line spacing, m；Cp, pre-signal week
Phase duration, s；gp, pre-signal green light start time, s；λp, pre-signal split；
The optimization object function is maximizes the traffic capacity of piggybacking left turn lane, as shown in formula (1)；
max spλp (1)
The constraint of the queue length, it is desirable to which piggybacking left turn lane length should be greater than being equal into the track left turning vehicle
Queue length, that is, meet formula (2) requirement；
The constraint that the vehicle empties, it is desirable to meet following four constraints：
First, pre-signal green light start time should meet all vehicles using the exit ramp by pre- stop line institute
In section, that is, meet formula (3) requirement；
Second, the traffic capacity of the piggybacking left turn lane at intersection parking line should be greater than leading to equal to piggybacking left turn lane
Row ability, it is to ensure that in same phase by intersection vehicle delay can not occur for the left turning vehicle into the track, i.e., full
Sufficient formula (4) requires；
sIλI≥spλp (4)
Third, the time interval of left-hand rotation green light finish time corresponding with main signal pre-signal green light finish time should be greater than
Running time equal to left turning vehicle by piggybacking left turn lane, enter piggybacking left turn lane in pre-signal green light latter stage to ensure
Vehicle also can meet formula (5) requirement in the phase by intersection；
Fourth, the main pre-signal cycle duration in intersection should be consistent, to ensure that main pre-signal has good coordination control effect,
Meet formula (6) requirement；
CI=Cp (6)
The Optimal Parameters span should meet following four constraints：
First, Optimal Parameters are non-negative, that is, meet formula (7) requirement；
L,gp,λp,Cp≥0 (7)
Second, pre-signal green light start time not should be greater than cycle duration, that is, meet formula (8) requirement；
gp≤Cp (8)
Third, pre-signal split cannot be greater than 1, that is, meet formula (9) requirement；
λp≤1 (9)
Fourth, at the time of pre-signal Effective Green Time finish time is import left turn lane queue clearance arrival pre- stop line, i.e.,
Meet formula (10) requirement.
Need to consider in above-mentioned optimization process：(1) in terms of queue length constraint angle, the pre- line position that stops is arranged on distance
Intersection parking line is more remote better, can accommodate more queuing vehicles；(2) emptied from vehicle in terms of constraint angle, pre- stop line position
Put and be arranged on more near better apart from intersection parking line, vehicle clean up time can be reduced；This optimal design-aside method considers this two side
The contradiction in face, established in a unified Optimized model, so as to make piggybacking turn left on the basis of current safety is ensured
The traffic efficiency of this intersection design pattern in intersection is not fully exerted.
The present invention compared with the existing technology, has advantages below and beneficial effect：
1st, the invention provides a kind of pre- stop line and pre-signal method to set up for piggybacking left-hand rotation intersection.
2nd, method of the invention need not change intersection main signal timing, can be real under the conditions of given main signal timing
Now to the pre- stop line in piggybacking left-hand rotation intersection and the optimal design-aside of pre-signal.
3rd, method of the invention considers queue length constraint and vehicle empties and constrains this to contradiction, can ensure current peace
On the basis of complete, the traffic capacity of piggybacking left turn lane is maximized.
Brief description of the drawings
Fig. 1 is major parameter schematic diagram in the present invention；
Fig. 2 is the schematic diagram that vehicle empties constraint in the present invention；
Fig. 3 is intersection geometrical condition schematic diagram in the embodiment of the present invention 1.
Embodiment
Below in conjunction with drawings and examples, the present invention is further illustrated.
A kind of pre- stop line in piggybacking left-hand rotation intersection and pre-signal method to set up, it is synchronous by solving following Optimized models
The pre- parking line position of optimization and pre-signal timing；Optimized model is stated with linear programming model, using Maximum Traffic Capacity as excellent
Change target, and consider that queue length, vehicle empty and Optimal Parameters span constraints.The major parameter signal of model is such as
Shown in Fig. 1, wherein：1 by main signal, 2 it is pre-signal, 3 is that research import, A are pre- stop line, 4 are piggybacking left turn lane, 5
It is the right side import for studying import by import left turn lane, 6.
The input parameter of Optimized model includes：sp, the saturation volume rate of piggybacking left turn lane, veh/h are entered at pre- stop line；
sI, saturation volume rate of the piggybacking left turn lane at intersection parking line, veh/h；N, piggybacking left turn lane number, bar；CI, main signal
Cycle duration, s；gI, main signal left-hand rotation green light start time, s；λI, main signal left-hand rotation split；rI', study the right side of import
Side-entrance main signal left-hand rotation red light start time, s；V, average speed, m/s；vmin, minimum speed, m/s；vw, queue clearance ripple
Velocity of wave, m/s；D, the average headstock Ullage of queuing vehicle, m；δ, safe time interval, s；
The output parameter of Optimized model includes：L, pre- stop line and intersection parking line spacing, m；Cp, during the pre-signal cycle
It is long, s；gp, pre-signal green light start time, s；λp, pre-signal split；
The object function is maximizes the traffic capacity of piggybacking left turn lane, as shown in formula (1)；
max spλp (1)
The constraint of queue length, it is desirable to which piggybacking left turn lane length should be greater than being equal to the queuing into the track left turning vehicle
Length, that is, meet formula (2) requirement；
The constraint that vehicle empties, it is desirable to meet following four constraints (as shown in Fig. 2 wherein：A is pre- stop line, B
For intersect stop line, D by the main signal left-hand rotation green light phase of right side import of research import, R be main signal left-hand rotation green light phase
Position, F are pre-signal green light phase)：
First, pre-signal green light start time should meet all vehicles using the exit ramp by pre- stop line institute
In section, that is, meet formula (3) requirement；
Second, the traffic capacity of the piggybacking left turn lane at intersection parking line should be greater than leading to equal to piggybacking left turn lane
Row ability, it is to ensure that in same phase by intersection vehicle delay can not occur for the left turning vehicle into the track, i.e., full
Sufficient formula (4) requires；
sIλI≥spλp (4)
Third, the time interval of left-hand rotation green light finish time corresponding with main signal pre-signal green light finish time should be greater than
Running time equal to left turning vehicle by piggybacking left turn lane, enter piggybacking left turn lane in pre-signal green light latter stage to ensure
Vehicle also can meet formula (5) requirement in the phase by intersection；
Fourth, the main pre-signal cycle duration in intersection should be consistent, to ensure that main pre-signal has good coordination control effect,
Meet formula (6) requirement；
CI=Cp (6)
Optimal Parameters span should meet following four constraints：
First, Optimal Parameters are non-negative, that is, meet formula (7) requirement；
L,gp,λp,Cp≥0 (7)
Second, pre-signal green light start time not should be greater than cycle duration, that is, meet formula (8) requirement；
gp≤Cp (8)
Third, pre-signal split cannot be greater than 1, that is, meet formula (9) requirement；
λp≤1 (9)
Fourth, at the time of pre-signal Effective Green Time finish time is import left turn lane queue clearance arrival pre- stop line, i.e.,
Meet formula (10) requirement.
Need to consider in above-mentioned optimization process：(1) in terms of queue length constraint angle, the pre- line position that stops is arranged on distance
Intersection parking line is more remote better, can accommodate more queuing vehicles；(2) emptied from vehicle in terms of constraint angle, pre- stop line position
Put and be arranged on more near better apart from intersection parking line, vehicle clean up time can be reduced；This optimal design-aside method considers this two side
The contradiction in face, established in a unified Optimized model, so as to make piggybacking turn left on the basis of current safety is ensured
The traffic efficiency of this intersection design pattern in intersection is not fully exerted.
Specific embodiment：
Intersection geometrical condition is as shown in figure 3, wherein in the embodiment of the present invention：E is eastern import, S is southing mouth, N is north
Import, W are western import.Intersection main signal timing is as shown in table 1.Existing western import, which proposes, puts 1 piggybacking left turn lane, using this
Method in invention, it is target by its Maximum Traffic Capacity after setting piggybacking left turn lane, carries out pre- parking line position and pre- letter
Number timing designing, and contrasted with the design of conventional cross mouth.Design driver is：Enter piggybacking left-hand rotation car at pre- stop line
The saturation volume rate in road, sp, take 1600veh/h；Saturation volume rate of the piggybacking left turn lane at intersection parking line, sI, take
1800veh/h；Main signal cycle duration, CITake 120s；Main signal left-hand rotation green light start time, gI, take 60s；Main signal is turned left green
Believe ratio, λI, take 0.25；Southing mouth main signal left-hand rotation red light start time, rI', take 20s；Average speed, v, take 10m/s；It is minimum
Speed, vmin, take 6m/s；Queue clearance ripple velocity of wave, vw, take 4.5m/s；The average headstock Ullage of queuing vehicle, d, takes 7m；When safe
Between be spaced, δ, take 2s.
Table 1
Detailed process is summarized as follows：
Step 1：Above-mentioned input parameter is substituted into the mathematical programming model of the invention established.
Step 2：Above-mentioned model is linear programming model, can use simplex method or duty Optimization software (such as
LINGO) solved.Optimum results are arranged on away from intersection parking line L=72.0m for pre- parking line position, and pre-signal is all
Phase duration (Cp) it is 120s, pre-signal green light start time (gp) it is 50s, pre-signal split (λp) it is 0.21.
Step 3：Design research.Using the traffic capacity as evaluation index, traditional design scheme and the present invention are improved
Scheme is contrasted.Shown in the traffic capacity such as formula (11) of each track group in intersection.In traditional design scheme, pre- stop line is with handing over
Prong stop line spacing refers to《Urban road intersection planning specification GB50647-2011》Middle broadening segment length takes 60m, pre- letter
Number timing is identical with the western import left rotaring signal timing in intersection.
ci=siniλi (11)
In formula：ciFor the traffic capacity of each track group in intersection, veh/h；siFor the saturation volume rate of each track group in intersection,
Uniformly take 1800veh/h；niFor the number of track-lines of each track group in intersection；λiThe split respectively flowed to for intersection.
As shown in table 2, by the inventive method, to the pre- parking line position of western import piggybacking left turn lane and pre-signal timing
Optimize, can making the present embodiment, western import is borrowed in the case where the other track group traffic capacitys in intersection keep constant
The road left turn lane traffic capacity improves 57.7%, and the flow direction adds up to the traffic capacity to improve 18.6%, leads to piggybacking left-hand rotation intersection
Line efficiency is given full play to.
Table 2
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this hair
It is bright.Person skilled in the art obviously easily can make various modifications to this embodiment, and described herein
General Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to implementation here
Example, for those skilled in the art according to the announcement of the present invention, not departing from improvement that scope made and modification all should be
Within protection scope of the present invention.
Claims (2)
1. a kind of pre- stop line in piggybacking left-hand rotation intersection and pre-signal method to set up, it is characterised in that：Piggybacking is turned left intersection
The key parameter that distinctive pre- stop line and pre-signal are set is incorporated into a unified Optimized model, synchronizes optimization,
So as to improve the traffic capacity on the basis of current safety is ensured, the Optimized model is stated with linear programming model, with the energy that passes through
Power maximum is used as optimization aim, and consider queue length, vehicle empty with Optimal Parameters span constraints, wherein：
The input parameter of the Optimized model includes：sp, the saturation volume rate of piggybacking left turn lane, veh/h are entered at pre- stop line；
sI, saturation volume rate of the piggybacking left turn lane at intersection parking line, veh/h；N, piggybacking left turn lane number, bar；CI, main signal
Cycle duration, s；gI, main signal left-hand rotation green light start time, s；λI, main signal left-hand rotation split；r′I, study the right side of import
Side-entrance main signal left-hand rotation red light start time, s；V, average speed, m/s；vmin, minimum speed, m/s；vw, queue clearance ripple
Velocity of wave, m/s；D, the average headstock Ullage of queuing vehicle, m；δ, safe time interval, s；
The output parameter of the Optimized model includes：L, pre- stop line and intersection parking line spacing, m；Cp, during the pre-signal cycle
It is long, s；gp, pre-signal green light start time, s；λp, pre-signal split；
The optimization object function is maximizes the traffic capacity of piggybacking left turn lane, as shown in formula (1)；
max spλp (1)
The constraint of the queue length, it is desirable to which piggybacking left turn lane length should be greater than being equal to the queuing into the track left turning vehicle
Length, that is, meet formula (2) requirement；
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The constraint that the vehicle empties, it is desirable to meet following four constraints：
First, pre-signal green light start time should meet all vehicles using exit ramp by section where pre- stop line,
Meet formula (3) requirement；
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Second, the traffic capacity of the piggybacking left turn lane at intersection parking line should be greater than the current energy equal to piggybacking left turn lane
Power, to ensure that the left turning vehicle into the track can not occur vehicle delay, that is, meet formula in same phase by intersection
(4) require；
sIλI≥spλp (4)
Third, the time interval of left-hand rotation green light finish time corresponding with main signal pre-signal green light finish time should be greater than being equal to
Left turning vehicle enters the car of piggybacking left turn lane to ensure by the running time of piggybacking left turn lane in pre-signal green light latter stage
Also it can meet formula (5) requirement in the phase by intersection；
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Fourth, the main pre-signal cycle duration in intersection should be consistent, it is to ensure that main pre-signal has good coordination control effect, i.e., full
Sufficient formula (6) requires；
CI=Cp (6)
The Optimal Parameters span should meet following four constraints：
First, Optimal Parameters are non-negative, that is, meet formula (7) requirement；
L,gp,λp,Cp≥0 (7)
Second, pre-signal green light start time not should be greater than cycle duration, that is, meet formula (8) requirement；
gp≤Cp (8)
Third, pre-signal split cannot be greater than 1, that is, meet formula (9) requirement；
λp≤1 (9)
Fourth, at the time of pre-signal Effective Green Time finish time is import left turn lane queue clearance arrival pre- stop line, that is, meet
Formula (10) requirement.
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2. the pre- stop line in piggybacking left-hand rotation intersection according to claim 1 and pre-signal method to set up, it is characterised in that：On
State needs to consider in optimization process：(1) in terms of queue length constraint angle, the pre- line position that stops is arranged on apart from intersection parking
Line is more remote better, can accommodate more queuing vehicles；(2) emptied from vehicle in terms of constraint angle, the pre- line position that stops be arranged on away from
It is more near better from intersection parking line, vehicle clean up time can be reduced；This optimal design-aside method considers the contradiction of these two aspects, will
It is established in a unified Optimized model, so as to make this friendship in piggybacking left-hand rotation intersection on the basis of current safety is ensured
The traffic efficiency of prong design pattern is not fully exerted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610164786.XA CN105788301B (en) | 2016-03-22 | 2016-03-22 | The pre- stop line in piggybacking left-hand rotation intersection and pre-signal method to set up |
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| CN109523808B (en) * | 2018-12-27 | 2021-07-27 | 长安大学 | Channelized optimization method for left-turn displacement intersection |
| CN111402602B (en) * | 2020-03-13 | 2021-09-07 | 东南大学 | Left-turn shift, widening and secondary parking combined signal priority system and application method thereof |
| CN111402605B (en) * | 2020-03-24 | 2021-05-14 | 东南大学 | Traffic capacity model optimization-based signal control method for borrowing left turn of opposite lane |
| CN112509323A (en) * | 2020-11-30 | 2021-03-16 | 武汉理工大学 | Control method and device for linkage of left-turn main pre-signal and storage medium |
| CN113436448B (en) * | 2021-06-28 | 2022-08-23 | 武汉市政工程设计研究院有限责任公司 | Signalized intersection lane borrowing left-turning lane design method and system |
| CN114582142A (en) * | 2022-03-08 | 2022-06-03 | 山东大学 | Intersection vehicle running state modeling method and system with variable lanes |
| CN116084224B (en) * | 2023-02-01 | 2023-10-03 | 哈尔滨工业大学 | Intersection traffic design system based on dynamic lane control and vehicle running method |
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Application publication date: 20160720 Assignee: SHANGHAI JI'AN TRANSPORTATION CONSULTING CO.,LTD. Assignor: University of Shanghai for Science and Technology Contract record no.: X2021980013661 Denomination of invention: Pre stop line and pre signal setting method of left turn intersection Granted publication date: 20180126 License type: Common License Record date: 20211202 |