CN109385940A - Left-hand rotation based on traffic shock wave theory turns around mouth away from the design method for stopping line length - Google Patents
Left-hand rotation based on traffic shock wave theory turns around mouth away from the design method for stopping line length Download PDFInfo
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Abstract
The present invention is based on the left-hand rotations of traffic shock wave theory to turn around mouth away from the design method for stopping line length, step are as follows: relevant traffic flow data is acquired by artificial counting method, utilize traffic flow wave theory, the velocity of wave that wave is assembled in intersection is calculated with intersection left-turn volume and left turn traffic density, assemble the distance skimmed in intersection upstream according to wave is assembled, the maximum queue length for finding out upstream left turning vehicle, taking the length is distance of the turn lane away from stop line.Left-hand rotation provided by the invention based on traffic shock wave theory turns around mouth away from the design method for stopping line length, compensate for turn around inside intersection it is middle left-hand rotation turn around mouth away from stop line length design aspect blank, effectively reduce influence of the vehicle to left turning vehicle of turning around, intersection congestion can be reduced and reduce the shunting conflict turned around and turned left with lane left-hand rotation as far as possible, pedestrian is to the influence of vehicle of turning left to turn around on reduction crossing, intersection operational efficiency and safety are improved, intersection capacity is improved.
Description
Technical field
The invention belongs to technical field of road design in traffic engineering, and in particular to the left-hand rotation based on traffic shock wave theory is turned around
Mouth is away from the design method for stopping line length.
Background technique
With the development of the social economy, the growth of explosion type is presented in China's car ownership, consequent is city road
Road service level dramatic decrease.Therefore, it promotes Assessment of Serviceability of Roads and has become working as in terms of Current City Road infrastructure
It is engaged in anxious, and the optimization design of urban road intersection is its most important thing.It is limited to city problems of land utilization itself, urban road
Construction land is it is not possible that infinite extension, and especially in urban road intersection section, thus mouth design of turning left to turn around is by many friendships
Logical designer is paid attention to, and the purpose is to solve intersection vehicles congestion with least fund and soil and reduce as far as possible to a left side
Turn the interference of vehicle and pedestrian, reduces traffic accident.
Left turn traffic is the most wagon flow of conflict point in level-crossing wagon flow, and turn around vehicle because with left turning vehicle
It turns to ipsilateral, equally affects to the traffic efficiency traffic safety of intersection.Therefore left-hand rotation is resolved to turn around traffic
Problem, and the road network traffic capacity and safety are improved, enhance the key point of Road Network Reliability.
By factual survey it is found that this scheme effect when solving actual urban intersection congestion and safety problem is paid no attention to
Think.Turn left to turn around mouth set-up mode there are many, turn around to be off the one kind to turn around inside line before entrance driveway stop line, it is this fall
The shortcomings that head method, is:
1) turn left the to turn around traffic efficiency of vehicle certainly will be influenced by left-hand rotation garage wheel paths and wagon flow ratio, when with failing to agree
Change trains or buses flow it is excessive when, the left-hand rotation vehicle that turns around needs to wait for can pass after front left turning vehicle is current, this is also to rear etc.
Vehicle to be turned left causes to hinder and then influence the traffic efficiency of intersection；
2) when left-hand rotation is turned around between vehicle and left turn traffic counterclockwise, right-hand rotation wagon flow clockwise there is no time slot, and
It will cause exit ramp congestion when entering exit ramp simultaneously and then influence the traffic efficiency of intersection.
Summary of the invention
The purpose of the present invention is to provide a kind of left-hand rotations based on traffic shock wave theory to turn around mouth away from the design for stopping line length
Method, with the maximum queue length of left turning vehicle when traffic shock wave theoretical calculation peak, is divided by analyzing the traffic light signal period
Analysis obtains turning left to turn around appropriate distance of the mouth away from stop line, and the mouth that solves the problems, such as to turn left to turn around is arranged unreasonable, reduces a left side
Turn influence of the vehicle to same lane left turning vehicle of turning around.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of left-hand rotation based on traffic shock wave theory turns around mouth away from the design method for stopping line length, includes the following steps:
(1) measurement point left turn lane spot spe J, a left side in traffic data, including 150-200 meters of intersection upstream are acquired
Change trains or buses a peak hour traffic, left turning vehicle by stop line time headway and vehicle pass through stop line when place vehicle
Speed；
(2) according to the three parameter volume of traffic of traffic flow, the relationship of speed and density, upstream 150- is calculated according to formula Q=K*V
Left turning vehicle vehicle density K at 200 meters1:
(3) according to traffic flow micro-parameter time headwaySpace headwayAnd vehicle velocity V2Relationship, it is left to calculate intersection
It changes trains or buses a space headway
(4) it according to the three parameter volume of traffic of traffic flow, the relationship of speed and density, can calculate left at place's intersection stop line
The vehicle density K to change trains or buses2:
(5) according to the wave theory of traffic flow, formulaIt is generated when calculating left turn lane parking and assembles wave
Velocity of wave W1:
According to the three parameter volume of traffic of traffic flow, the relationship of speed and density, Q=K*V, and because vehicle is parked at stop line
When waiting red light, speed 0, volume of traffic Q at this time2It also is 0, so assembling the velocity of wave W of wave1:
(6) when left rotaring signal lamp in intersection is non-green light, left turn traffic is assembled wave and is generated, when intersection left rotaring signal lamp turns
Evanescent wave generates when for green light, assembles the maximum queue length that the distance that wave is passed by is vehicle at this time, it can thus be concluded that going out to assembling
Wave generates to evanescent wave time interval t when generating1, left rotaring signal lamp red time is equal to relative position signal lamp green time
tRelative position green light, equidirectional straight trip green time tStraight trip green lightAnd yellow time tAmber lightThe sum of, i.e., following formula six:
t1=tRelative position green light+tStraight trip green light+tAmber lightFormula six
(7) according to the wave theory of traffic flow, W1< 0, vehicle form the traveling side of the moving direction and vehicle of assembling wave
To on the contrary, assembling wave is to the movement of tailstock direction, when left-hand rotation green light, left turn traffic evanescent wave is generated, and turn left vehicle at this time
Assembling the distance skimmed over of wave is exactly maximum queue length, i.e. the maximum queue length d of vehicle:
D=t1*w1Formula seven
(8) in order to fully consider that left turning vehicle queuing is not influenced by the vehicle that turns around, that is, vehicle is turned around before participating in queuing
It directly turns around, distance of the mouth away from stop line of turning left to turn around, which is picked up the car, flows the maximum queue length D of peak period left turning vehicle, calculation formula
Are as follows:
D=d=t1*w1Formula eight
Wherein, Q1For the measurement point volume of traffic in 150-200 meters of intersection upstream, unit :/hour；V1For on intersection
Swim section operating speed, unit: thousand ms/h；V2It is vehicle by the speed at the stop line of intersection, unit: km/small
When；Third vehicle and the 4th vehicle headstock pass through the time interval of stop line when for vehicle start, that is, third and the
Four vehicles pass through the time headway of stop line, unit: the second/；The headstock of third vehicle and the 4th vehicle when for vehicle start
Spacing, unit: rice/；t1The time interval generated to evanescent wave, unit: second are generated to assemble wave.
Further, in step (1), manually counting method acquires traffic data, and vehicle is divided into car, in-between car
And large car, and kind of an investigation is carried out point, the data for needing to acquire have: the respective amount of driving into of large, medium and small type vehicle, signal lamp cycle,
The respective volume of traffic of the large, medium and small type vehicle of acquisition is counted and is converted into equivalent car transportation amount.
Further, in step (2), the step of acquiring the intersection upstream sites speed includes: in intersection upstream
The spot spe J of measurement point measurement left turn lane vehicle, draws spot spe J statistical form, takes spot spe J in 150-200 meters
Average value is as V1；The spot spe J that left turning vehicle is measured at the stop line of intersection, draws speed statistical form, takes spot spe J
Average value as V2。
Further, in step (3), acquire time headway the step of include: at the stop line of intersection, measure third
With the time headway of the 4th vehicle, the time headway average value table in multiple periods is drawn, the average value for calculating time headway is
The time headway of the intersection left turning vehicle.
Further, the volume of traffic that the large, medium and small type vehicle respectively enters and exits is converted into equivalent car transportation
The calculation method of amount are as follows: Q=∑ QiEi, wherein Q is the equivalent car transportation amount after conversion, and i is vehicle, including large car,
In-between car and compact car；EiFor i class vehicle conversion factor, QiFor the volume of traffic of i class vehicle.
Further, in step (3), when the step of acquisition time headway includes: morning peak, in intersection stop line
Place, successively measures the time headway of queuing vehicle since third vehicle, draws the time headway table in multiple periods, according to as follows
Formula:
The average value for calculating time headway is the time headway of the intersection left turning vehicle.
Further, assemble wave and generate the time interval t generated to evanescent wave1Determination method include: meter the first and second phase
Position is North and South direction, third and fourth phase is east-west direction, and North and South direction left-hand rotation non-green time equivalent signal lamp total period subtracts south
The north is turned left green time, i.e., North and South direction is turned left, and the non-green time, to be equal to North and South direction straight trip green time, east-west direction green
The sum of lamp time and yellow time, it is green that east-west direction left-hand rotation green time is equal to east-west direction straight trip green time, North and South direction
The sum of lamp time and yellow time.
Further, according to traffic flow wave theory, vehicle forms the driving direction of the moving direction and vehicle of assembling wave
On the contrary, it is mobile to tailstock direction for assembling wave.It is exactly occupied by maximum queuing vehicle that left turning vehicle, which assembles the distance that wave skims over,
Road, i.e. the maximum queue length d:d=t of vehicle1*w1。
Compared with the prior art, the beneficial effects of the present invention are:
1) present invention acquires relevant traffic flow data by artificial counting method and uses intersection using traffic flow wave theory
Left-turn volume and left turn traffic density calculate the velocity of wave that wave is assembled in intersection, and according to wave is assembled, in intersection upstream, assembly is plunderred
The distance crossed finds out the maximum queue length of upstream left turning vehicle, and taking the length is distance of the turn lane away from stop line；
2) present invention be highway layout person provide it is a kind of left-hand rotation turn around mouth away from stop line length design method, make up
Middle left-hand rotation of turning around inside intersection is turned around blank of the mouth away from the design aspect for stopping line length, improves the service water of intersection
It is flat；
3) present invention can reduce intersection congestion and reduce the shunting punching for turning left with lane and turning around and turning left as far as possible
Prominent, pedestrian is to the influence of vehicle of turning left to turn around on reduction crossing.The present invention is sufficiently analyzed in intersection Facilities Construction situation
On the basis of, comprehensively consider left-hand rotation and turn around and left turning vehicle intertexture problem, avoids left turning vehicle and turn around vehicle in intersection
Shunting conflict out；
3) vehicle is turned around in the present invention can be using the flexible organization traffic of counter flow gap, but vehicle left-hand rotation is turned around space phase
It will receive limitation to compared with tight turn radius, so the opening width that turns around should rationally be arranged, inspection information, a mouthful size of turning left to turn around is answered
Take 10 meters it is more appropriate.
Detailed description of the invention
Fig. 1 is left-hand rotation turn lane schematic diagram in intersection of the present invention；
Fig. 2 is data measurement sites schematic diagram of the present invention；
Fig. 3 is four phase signal intersection timing schematic diagrames.
Specific embodiment
Below in conjunction with the attached drawing in the present invention, technical solution of the present invention is clearly and completely described, it is clear that
The described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Those of ordinary skill in the art's all other embodiment obtained under the conditions of not making creative work, belongs to this hair
The range of bright protection.
Embodiment 1
A kind of design method of the left-hand rotation turn lane based on traffic shock wave theory away from stopping line length, comprises the following steps that
(1) traffic data measures:
It is left turning vehicle normally travel spot spe J and peak time volume of traffic tune at 200 meters of crossing inlet road upstream
It makes an inventory of, spot spe J points for investigation when passing through stop line before the stop line of intersection for left turning vehicle time headway and vehicle, from third
Vehicle starts, and record vehicle reaches time headway of the time headway average value of stop line as vehicle start when.
Firstly, there is the spot spe J for investigating vehicle at 200 meters at spot spe J points for investigation on intersection, and record；So
Afterwards, the peak hour traffic for passing through the large, medium and small type vehicle of the point with 10 minutes for a time interval continuous observation；Then,
Time headway points for investigation investigates spot spe J when time headway average value and vehicle pass through stop line within multiple periods；Finally,
The observation signal lamp period calculates intersection left-hand rotation red time t1。
Calculate left turning vehicle density K at 200 meters of intersection upstream1The step of include:
According to the spot spe J in the peak hour traffic and normal vehicle operation measured on intersection, by traffic flow three
The relationship of the parameter volume of traffic, speed and density, it is known that the traffic density K of intersection upstream1Are as follows:
Calculate the density K at the stop line of intersection2The step of include:
Firstly, according to the time headway in the investigation of time headway points for investigationPass through the spot spe J V of stop line with vehicle2,
Space headway is calculated by following formula two
Space headway obtained by calculationThe vehicle density K of intersection is calculated by formula three again2:
It calculates left turn lane parking and generates the velocity of wave W for assembling wave1The step of include:
The Q obtained according to traffic shock wave theory and measurement1And the K being calculated1And K2, available velocity of wave W1:
According to the three parameter volume of traffic of traffic flow, the relationship of speed and density, Q=K*V, and because vehicle is parked at stop line
When waiting red light, speed 0, volume of traffic Q at this time2It also is 0, so assembling the velocity of wave W of wave1:
When intersection left rotaring signal lamp is non-green light, left turn traffic is assembled wave and is generated, and when intersection, left rotaring signal lamp switchs to
Evanescent wave generates when green light, assembles the maximum queue length that the distance that wave is passed by is vehicle at this time, it can thus be concluded that going out to assembly wave
Generate time interval t when evanescent wave generates1, left rotaring signal lamp red time is equal to relative position signal lamp green time
tRelative position green light, equidirectional straight trip green time tStraight trip green lightAnd yellow time tAmber lightThe sum of, i.e., following formula six:
t1=tRelative position green light+tStraight trip green light+tAmber lightFormula six
Theoretical according to traffic shock wave, assembling the length skimmed over after wave direction is exactly the occupied road of left turning vehicle, i.e. vehicle
Maximum queue length, i.e. the maximum queue length d of vehicle:
D=t1*w1Formula seven
Turn left to turn around the determination step of length of the mouth away from stop line are as follows:
In order to fully consider that left turning vehicle queuing is not influenced by the vehicle that turns around, that is, the vehicle that turns around is direct before participating in queuing
It turns around, distance of the mouth away from stop line of turning left to turn around, which is picked up the car, flows the maximum queue length D of peak period left turning vehicle, calculation formula are as follows:
D=d=t1*w1Formula eight
Embodiment 2
By taking Huai'an Chengde road and bright long way intersection as an example, which has left turn lane, does not set special
Turn lane, read up the literature and know, the length of turn lane generally uses 10 meters.Control of the traveling of vehicle by signal lamp.Vehicle
The influence turned around vulnerable to other vehicles and pedestrian.
A kind of left-hand rotation based on traffic shock wave theory turns around mouth away from the design method for stopping line length, includes the following steps:
(1) traffic data measures:
It is left turning vehicle spot spe J and peak time traffic census point at 200 meters of crossing inlet road upstream, hands over
The spot spe J points for investigation for passing through stop line before prong stop line for left turning vehicle time headway points for investigation and vehicle, from third
Vehicle starts, time headway when using the time headway average value at vehicle arrival stop line as vehicle start.
Firstly, investigating the spot spe J of vehicle at spot spe J points for investigation, and record；Then, with 10 minutes for one
The peak hour traffic that time interval continuous observation passes through the large, medium and small type vehicle of the point；Then, time headway points for investigation tune
Look into time headway in one cycle；Finally, in the observation signal lamp period, calculate intersection left-hand rotation red light interval t1, turn left
Signal lamp red time is 97s, and table 1 is the volume of traffic of great Ming Lu and Chengde road intersection (left-hand rotation).
Table 1
According to the measurement figure of the volume of traffic of table 1, the urban transportation amount in conjunction with shown in the following table 2, which investigates vehicle classification and converts, is
Number table knows that the conversion coefficient of large car and jubilee wagen is 3.0 and 1.5, the volume of traffic Q after conversion1It is (practical for 113/hour
For 112.5/hour).
Table 2
(2) time headway statistical form as shown in table 3, is computed, and the average speed in the section is 50.4 thousand ms/h；
Intersection upstream vehicle density is calculated, by Q=K*V it is found that Q1Take 113/hour, V150.4 thousand ms/h are taken, obtains k1=
2.24/km, when vehicle is parked in waiting red light at stop line, speed 0, volume of traffic Q at this time2Also it is 0, obtains away from intersection
200 upstream meter Chu left turning vehicle spot spe J statistical forms of mouth, such as the following table 4.
Table 3
(3) time headway takes the average value in each period measured, and the data of You Shangbiao 3 are it is found that takeSecond/.
Spot spe J statistical form is measured according at the stop line of intersection, is computed left turning vehicle by being averaged at the stop line of intersection
Speed is 15.5 thousand ms/h, according to formulaIt can obtainIt takesRice/, then
Bring density calculation formula intoObtain the vehicle density K of left turning vehicle at the stop line of intersection2=83/km.
Table 4
Table 4
Table 5 is spot spe J statistical form at the stop line of intersection.
Table 5
(4) the maximum queue length D of left turning vehicle is calculated
According to formulaIt is available: W1=1.4 thousand ms/h.Again because of t1=97s, according to formula D=
D=t1*w1, can determine that length D of the left-hand rotation turn lane away from stop line is 37 meters.
The above embodiments do not limit the invention in any form, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution, all fall within protection scope of the present invention.
Claims (6)
1. the left-hand rotation based on traffic shock wave theory is turned around, mouth is away from the design method for stopping line length, which is characterized in that including walking as follows
It is rapid:
(1) traffic data is acquired, including the measurement point left turn lane spot spe J in 150-200 meter of intersection upstream, left-hand rotation
The time headway and vehicle that vehicle peak hour traffic, left turning vehicle pass through at stop line pass through place vehicle when stop line
Speed.
(2) according to the three parameter volume of traffic of traffic flow, the relationship of speed and density, measurement point in upstream 150-200 meters is calculated
Left turning vehicle vehicle density K1:
Wherein, Q1For the volume of traffic of the measurement point in 150-200 meters of intersection upstream, unit :/hour；V1For on intersection
Swim section operating speed, unit: thousand ms/h；
(3) according to traffic flow micro-parameter time headwaySpace headwayAnd vehicle velocity V2Relationship, calculate intersection left-hand rotation vehicle
Space headway
Wherein, V2It is vehicle by the speed at the stop line of intersection, unit: thousand ms/h；Third when for vehicle start
Vehicle and the 4th vehicle headstock pass through the time interval of stop line, that is, third and the 4th vehicle by stop line headstock when
Away from unit: the second/；Third and the 4th space headway when for vehicle start, unit: rice/.
(4) according to the three parameter volume of traffic of traffic flow, the relationship of speed and density, the vehicle of left turning vehicle at the stop line of intersection is calculated
Current density K2:
(5) it is calculated according to the wave theory of traffic flow and generates the velocity of wave W for assembling wave when left turn lane parking1:
When vehicle is parked in waiting red light at stop line, speed 0, volume of traffic Q at this time2It also is 0, so assembling the velocity of wave W of wave1:
(6) when left rotaring signal lamp in intersection is non-green light, left turn traffic is assembled wave and is generated, and when intersection, left rotaring signal lamp switchs to green
Evanescent wave generates when lamp, assembles the maximum queue length that the distance that wave is passed by is vehicle at this time, produces it can thus be concluded that going out to assembly wave
Time interval t1 when the raw generation to evanescent wave, left rotaring signal lamp red time are equal to relative position signal lamp green time
tRelative position green light, equidirectional straight trip green time tStraight trip green lightAnd yellow time tAmber lightThe sum of, i.e., following formula six:
t1=tRelative position green light+tStraight trip green light+tAmber lightFormula six
(7) according to the wave theory of traffic flow, work as W1< 0, vehicle form the driving direction phase of the moving direction and vehicle of assembling wave
Instead, that is, it is mobile to tailstock direction for assembling wave；When left-hand rotation green light, left turn traffic evanescent wave is generated, at this time left turning vehicle collection
The distance that knot wave skims over is exactly maximum queue length, i.e. the maximum queue length d of vehicle:
D=t1*w1Formula seven
Wherein, t1The time interval generated to evanescent wave, unit: second are generated to assemble wave.
(8) in order to fully consider that left turning vehicle queuing is not influenced by the vehicle that turns around, that is, the vehicle that turns around is direct before participating in queuing
It turns around, distance of the mouth away from stop line of turning left to turn around, which is picked up the car, flows the maximum queue length D of peak period left turning vehicle, calculation formula are as follows:
D=d=t1*w1Formula eight
Design method of the mouth away from stopping line length 2. the left-hand rotation according to claim 1 based on traffic shock wave theory is turned around,
It is characterized in that, in step (1), manually counting method acquires traffic data, and vehicle is divided into car, in-between car and large size
Vehicle, and carry out point kind of an investigation, the data for needing to acquire have: the respective amount of driving into of large, medium and small type vehicle, signal lamp cycle, to acquisition
The respective volume of traffic of large, medium and small type vehicle counted.
Design method of the mouth away from stopping line length 3. the left-hand rotation according to claim 1 based on traffic shock wave theory is turned around,
It is characterized in that, in step (2), the step of acquiring the intersection upstream sites speed includes:
The spot spe J of measurement point measurement left turn lane vehicle, draws spot spe J system in 150-200 meters of intersection upstream
Table is counted, the average value of spot spe J is taken, is denoted as V1, the spot spe J of left turning vehicle is measured at the stop line of intersection, draws vehicle
Fast statistical form takes the average value of spot spe J, is denoted as V2。
Design method of the mouth away from stopping line length 4. the left-hand rotation according to claim 2 based on traffic shock wave theory is turned around,
It is characterized in that, the volume of traffic that the large, medium and small type vehicle respectively enters and exits is converted into the calculating of equivalent car transportation amount
Method are as follows: Q=∑ QiEi, wherein Q is the equivalent car transportation amount after conversion, and i is vehicle, including large car, in-between car and
Compact car, EiFor i class vehicle conversion factor, QiFor the volume of traffic of i class vehicle.
Design method of the mouth away from stopping line length 5. the left-hand rotation according to claim 1 based on traffic shock wave theory is turned around,
It is characterized in that, in step (3), the method that acquires time headway are as follows: when morning peak, at the stop line of intersection, from third vehicle
Start the time headway for successively measuring queuing vehicle, draws the time headway average value table in multiple periods, according to following formula:
The average value for calculating time headway is the time headway of the intersection left turning vehicle.
Design method of the mouth away from stopping line length 6. the left-hand rotation according to claim 1 based on traffic shock wave theory is turned around,
It is characterized in that, in step (6), assembles wave and generate the time interval t generated to evanescent wave1Determination method include: meter first and second
Phase is North and South direction, third and fourth phase is east-west direction, and North and South direction left-hand rotation non-green time equivalent signal lamp total period subtracts
North and South direction left-hand rotation green time, i.e. North and South direction turn left the non-green time equal to North and South direction straight trip green time, east-west direction
The sum of green time and yellow time, east-west direction left-hand rotation green time are equal to east-west direction straight trip green time, North and South direction
The sum of green time and yellow time.
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| CN112376340A (en) * | 2020-12-03 | 2021-02-19 | 吉林大学 | Design method for left-turn intersection guide line and left-turn stop line |
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Effective date of registration: 20211230 Address after: 223000 No. 18 Shantou Road, economic and Technological Development Zone, Huai'an City, Jiangsu Province (6th floor, Chuangye building, bochi township) Patentee after: Huai'an Municipal Design and Research Institute Co., Ltd Address before: No. 1, Huaian City, Jiangsu, Jiangsu Patentee before: HUAIYIN INSTITUTE OF TECHNOLOGY |