CN106683443A - Method for time designing and optimizing left turn phase of signalized intersection - Google Patents
Method for time designing and optimizing left turn phase of signalized intersection Download PDFInfo
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Abstract
The invention discloses a method for time designing and optimizing a left turn phase of a signalized intersection, wherein the calculation formulas of traffic capacity and delay under two conditions whether the intersection has a left turn special phase are put forward. Based on the traffic data obtained through a survey, the bases of settings of the left turn special phases at signalized intersections of urban roads are provided by comprehensively evaluating the operation of intersections and combining with the critical condition of the settings of the left turn special phases. By comparing the evaluation criteria of setting the left turn special phase, the intersection of the front and the back, the queue length and the like, the optimization effect is determined, so as to improve the traffic efficiency of the intersection. By comparing the evaluation criteria of the delay before and after setting the left turn special phases, the intersection of the front and the back, the queue length and the like, the optimization effect is determined so as to improve the traffic efficiency of the intersections. Through the reasonable design, the method for time designing and optimizing the left turn phase of the signalized intersection can effectively reduce the delay of the whole intersection and improve the service level of the intersection which has a larger traffic flow of left turn cars.
Description
Technical field
The present invention relates to the design and optimization method of a kind of signalized intersections left turn phase.
Background technology
With the fast development and the propulsion of urbanization process of Chinese national economy, China's resident's car ownership is rapidly carried
Height, China's urban highway traffic amount is also drastically floatd liter, and the thing followed is congested in traffic increasingly serious, and traffic accident takes place frequently, and
Noise pollution and atmosphere pollution aggravate.Especially traffic safety problem is more noticeable.
The reason for causing China's urban road above-mentioned traffic problems mainly has the following aspects：(l) road traffic basis
It is to cause the immediate cause of big city road traffic congestion that Facilities Construction speed does not catch up with transport need growth rate；(2) traffic
The need for control measures do not catch up with the development of urban transportation, existing road utilization rate is not high, and the road traffic for having aggravated city is tight
The situation of opening；(3) resident trip transport structure is unreasonable, and road priority is indefinite, and inducing substantial amounts of pavement usage needs
The amount of asking, has aggravated the road traffic pressure in city；(4) modern transportation consciousness in civic is thin, and the undisciplined phenomenon of traffic is serious, hands over
It is logical disorder, nervous urban highway traffic is made the matter worse.
Compared with the road traffic environment of external western developed country, the road traffic environment of China has a distinctive style, and it is special
It is mixed traffic to levy.Mixed traffic is easier to trigger traffic order chaotic, causes traffic congestion, brings traffic accident.Meanwhile, relative to
For section, there are three traffic flows of different directions at the intersection：Right-hand rotation traffic flow, through-traffic stream and left-turn traffic flow.
Interflow that this three bursts of wagon flows trigger, shunting, intersect and the behavior such as conflict makes the traffic order of intersection seem sufficiently complex, cause
The traffic accident occurred in intersection remains high in the proportion of whole traffic accident quantity, therefore, intersection often turns into city
The key point that city's traffic problems are administered.
Meanwhile, research shows, traffic accident of the driveway more than 2/3 is relevant with left turning vehicle, and left turn traffic not only increases
Conflict and be also the one of the main reasons for triggering intersection traffic accidents.Therefore, the tissue of left turn traffic hold water for
Level-crossing, whether unsignalized intersection or signalized intersections, all have significant in terms of crossing safety is improved
Effect.According to existing document report, left turning vehicle is separated from Through Lane, accident rate reduction by 18 to 77% can be made, it is right
In signalized intersections, different phases are set, and this data is differed；And for unsignalized intersection, left turn lane is set
Mean rate of failure (every million left-hand rotations car) is only without left turn lane 23%, and for signalized intersections, this ratio is 46%.
First, the current mode of Two-phases signal intersection left-hand rotation car：
According to China's traffic law, in Two-phases signal intersection, when being provided with left-hand rotation dedicated Lanes, left turning vehicle have with
Lower three kinds of modes pass through intersection：
L () is passed through using green light initial stage：
Green light initial stage, changes trains or buses first to cross conflict point to not reaching conflict point front left also to straight traffic, so that by intersecting
Mouthful.
(2) using to straight traffic can crossing gap pass through：
In the case of to straight traffic small traffic volume, left-hand rotation car using its can crossing gap pass through intersection.
(3) passed through using green light time interval (yellow time or complete red time)：
After green light terminates, to stopping travelling to straight traffic, the left turning vehicle being parked in intersection utilizes green light time interval
Run through intersection.
2nd, it is delayed without vehicle under left-hand rotation dedicated phase
Under the conditions of left-hand rotation dedicated phase, the delay that left turning vehicle is produced by signalized intersections is mainly including signal control
Delay, Conflict delay and other delays.
(l) signal Controlled drug-release：When signalized intersections are in low saturation traffic behavior, although the vehicle in different cycles
Arrival rate change at random, thereby increases and it is possible to queuing vehicle trapping phenomena occur, but by after one or two cycle, being detained vehicle will gradually
Dissipate, i.e., in longer time section, entrance driveway vehicle arrives and departs from keeping relative equilibrium.
(2) Conflict delay：It is mainly from left-hand rotation car and to straight traffic without left-hand rotation dedicated phase bottom left Conflict delay of changing trains or buses
Cause, with to very similar to wagon flow conflict is performed, therefore Conflict delay can be adopted approximately for this and unsignalized intersection left-hand rotation car
Calculated with unsignalized intersection left-hand rotation car Delay Model.
(3) other delays：Left turning vehicle is also included by total traffic delay of signalized intersections：
(3.l) acceleration-deceleration delay, i.e. left turning vehicle are at stop line or at conflict point due to prolonging for accelerating, slow down and produce
Late；
(3.2) reaction delay, i.e. driver need observation signal intersection inside wagon flow ruuning situation and produce to ensure safety
Raw delay；
(3.3) intertwined point delay, i.e. left turning vehicle are collaborated by being needed after conflict point with the vehicle for travelling in the same direction, because wait allows
The time loss gone and produce.
In sum, the traffic accident of intersection is closely related with left-turn traffic flow.However, intersection Signal Phase Design with
And metrics evaluation aspect, the method for also lacking system, therefore, this research is prolonged from the traffic capacity for improving intersection, and reduction
It is rational using left turn phase design and optimization method under mistake etc. multinomial evaluation index.To level-crossing left-turning traffic group
Organization method is studied, and has highly important realistic meaning.
The content of the invention
Based on above weak point, the invention provides the design and optimization method of a kind of signalized intersections left turn phase,
To reach the purpose of lifting intersection vehicles traffic efficiency.
The technology used in the present invention is as follows：The design and optimization method of a kind of signalized intersections left turn phase are as follows：
First, the structure of traffic capacity model
By the maximum vehicle number n of the left-hand rotation car of intersection2Computing formula be：
N in formula2--- in the second by the maximum vehicle number (pcu/h) of the left-hand rotation car of intersection；
q1--- to straight traffic flow (pcu/h)；
The influence coefficient of limited priority in the maximum calculating by number of η --- left-hand rotation car；
The ratio of α --- Free-moving vehicle；
The average arrival rate of λ --- unit gap；
ta--- to there is critical gap value (s) that limited priority bottom left changes trains or buses to straight traffic；
The minimum time headway of τ --- straight traffic, typically takes 2s；
tf--- left-hand rotation car follows the time (s).
The left-hand rotation car number for passing through intersection using green light interval is n3, and have：
N in formula3--- green light interim passes through the left turning vehicle number (pcu/h) of intersection；
ty--- green light time interval (s)；
L --- left turning vehicle sails out of the starting of conflict point, accelerates loss time (s)；
cIt is left--- left turn traffic continues through the average headway (s) of intersection.
Additionally, it is n to set the left turning vehicle number for passing through conflict point using green light initial stage in the signal period1, therefore, it is special without turning left
The traffic capacity of left turn lane meets formula during with phase：
The traffic capacity (pcu/h) of C in formula --- left turn lane；
n1--- in the first manner by the left turning vehicle number of intersection；
n2--- in the second by the left turning vehicle number of intersection；
n3--- in a third way by the left turning vehicle number of intersection.
2nd, the structure of Delay Model
Under the conditions of left-hand rotation dedicated phase, the delay that left turning vehicle is produced by signalized intersections is mainly including signal control
Delay, Conflict delay and other delays.
L () signal Controlled drug-release is when signalized intersections are in low saturation traffic behavior, although the vehicle in different cycles
Arrival rate change at random, thereby increases and it is possible to queuing vehicle trapping phenomena occur, but by after one or two cycle, being detained vehicle will gradually
Dissipate, i.e., in longer time section, entrance driveway vehicle arrives and departs from keeping relative equilibrium.
Signal Controlled drug-release temporal expression is as follows：
D in formula --- signal Controlled drug-release time (s)；
X --- saturation degree, is the ratio of track flow and the traffic capacity；
G --- Effective Green Time duration (s) in a cycle；
Q --- track flow (pcu/s)；
C --- cycle duration (s).
(2) Conflict delay unsignalized intersection time road vehicles mean delay meets equation
D in formulaIt is secondary--- secondary road vehicles average delay (s)；
Dmin--- Adams are delayed, and secondary road vehicles minimum average B configuration is delayed (s)；
X --- saturation degree, is the ratio of track flow and the traffic capacity；
γ, ε --- constant, when vehicle is reached obeys Poisson distribution, γ=0.
Meet M3 distributions with time headway and obtain delay estimation formula：
Q in formulaIt is main--- the vehicle flowrate (pcu/h) of main roads；
The influence coefficient of limited priority in the maximum calculating by number of η --- left-hand rotation car；
The ratio of α --- Free-moving vehicle；
The average arrival rate of λ --- unit gap；
ta--- to there is critical gap value (s) that limited priority bottom left changes trains or buses to straight traffic；
The minimum time headway of τ --- straight traffic, typically takes 2s.
Therefore, under the conditions of being calculated without left-hand rotation dedicated phase according to above formula, delay of the left turning vehicle at conflict point.Its
In, left turn traffic is secondary traffic flow, to being main traffic flow to straight traffic.
Q in formulaDirectly--- the vehicle flowrate (pcu/h) of Through Lane；
γ, ε --- constant, when vehicle is reached obeys Poisson distribution, γ=0；
The same above formula of remaining meaning of parameters.
Meanwhile, straight traffic Delay Model meets：
The influence coefficient of limited priority in the maximum calculating by number of η in formula --- left-hand rotation car；
The ratio of α --- Free-moving vehicle；
X --- saturation degree, is the ratio of track flow and the traffic capacity；
The average arrival rate of λ --- unit gap；
tf--- left-hand rotation car follows the time (s)；
ta--- to there is critical gap value (s) that limited priority bottom left changes trains or buses to straight traffic；
tc--- to there is critical gap value (s) that absolute priority bottom left changes trains or buses to straight traffic；
The minimum time headway of τ --- straight traffic, typically takes 2s.
(3) other delays
Left turning vehicle is also included by total traffic delay of signalized intersections：L) acceleration-deceleration delay, i.e. left turning vehicle are stopping
Due to the delay for accelerating, slowing down and producing at fare or at conflict point；2) reaction delay, i.e. driver need to see to ensure safety
The delay examined signalized intersections inside wagon flow ruuning situation and produce；3) intertwined point delay, i.e., left turning vehicle is by after conflict point
Need to be with the vehicle interflow of traveling in the same direction, the time loss produced because wait is given way.
3rd, in the city signal intersection of left-turning traffic outstanding problem, each import track magnitude of traffic flow, headstock by inquiry
When parameter calibration is carried out to traffic capacity model and Delay Model away from, left turn traffic critical gap data, when certain entrance driveway unit
The left turn traffic amount passed through in hour exceedes the setting threshold value of left-hand rotation dedicated phase, then consider to set up left-hand rotation specially in respective inlets road
With phase, by analyzing intersection practical operation situation, signal phase is redistributed, and the intersection hour drawn with reference to investigation
Vehicle flowrate, calculates each phase flow-rate ratio to redesign the signal timing dial of intersection, is changed to intersection ruuning situation
It is kind.
The present invention can be delayed and decrease and traffic capacity kept stable, and left-hand rotation dedicated phase serves optimization effect
Really, intersection service level is improved, and reaches the purpose of lifting intersection vehicles traffic efficiency.
Brief description of the drawings
Fig. 1 is the critical time headway cumulative frequency figure of left turn traffic；
Fig. 2 is intersection channelizing figure；
Fig. 3 is intersection position and periphery graph of a relation；
Fig. 4 is scientific and technological road-Shenyang road intersection signal timing figure；
Fig. 5 is signal timing dial figure after scientific and technological road-Shenyang road intersection optimization；
Fig. 6 is vehicles average delay with left turn traffic amount variation relation figure；
Fig. 7 is VISSIM simulated effect figures.
Specific embodiment
In the case of new and old two kinds of signal time distributing conceptions, by the above-mentioned traffic capacity model and Delay Model for being given, point
Do not calculate the delay in each import track and the total delay of intersection, the mean delay for obtaining all vehicles of intersection is carried out
Quantitative analysis.The improvement embodiment of an intersection is shown below is, specific design process is relate to, process is finally combined
VISSIM simulation softwares, further demonstrate the feasibility of the method.In the case of new and old two kinds of signal time distributing conceptions, by upper
The traffic capacity model and Delay Model for being given are stated, the delay in each import track and the total delay of intersection are calculated respectively, obtained
Mean delay to all vehicles of intersection carries out quantitative analysis.Under the conditions of new signal timing dial, if delay has been dropped
Low and traffic capacity kept stable, then left-hand rotation dedicated phase serve effect of optimization, intersection service level is improved,
Consider to receive new signal time distributing conception.
Embodiment 1
A, traffic characteristics data survey and behavioural analysis
Weihai City's science and technology-Jilin south of road direction mode of arriving traffic is investigated, the time interval of statistics is 30s, is obtained
To 50 groups of data, S is computed2/ X=0.94, is approximately 1, it is therefore assumed that observation data are Poisson distribution, the inspection of card side is carried out to it
Test, demonstrate,prove in the case of the level of signifiance 95%, χ2=6.02<χ2 0.05(3) null hypothesis, i.e. left turning vehicle=7.815, are received
Arrival meets Poisson distribution.
Time headway refer to the headstock of continuous two cars by a certain section when time interval, investigation 80 groups effectively keep straight on
Wagon flow time headway and 80 groups of left turn traffic time headways (being shown in Table 1), finishing analysis obtain average saturation headway straight trip and are
2.36s/pcu, left-hand rotation are 2.15s/pcu.Therefore saturation volume SDirectly=1525 (amount/hours/track), SIt is left=1674 (amounts/small
When/track).
Intersection straight trip/left turn traffic time headway statistics (s) of table 1
Time headway when not having left turning vehicle to pass through between through vehicles before and after definition is refusal gap, front and rear through vehicles
Between time headway when thering is left turning vehicle to pass through be acceptability risk.With video observed pattern record left turning vehicle at conflict point
Occur the process that can insert workshop gap in wait straight traffic, obtain refusing 81, gap, gap-acceptance 27.It was single with 0.5 second
Position, the time headway of gained is classified, and then obtain accumulation refusal frequency and accumulation receive frequency, summation curve can be obtained
Table.
The cummulative frequency curve figure of refusal gap and gap-acceptance is drawn, as shown in Figure 1.It is to face by two intersection points of curve
Boundary's gap width, obtains signalized intersections left turning vehicle and passes through to the about 4.5s of the critical gap to through vehicles.
B, intersection characteristic survey
Weihai City's science and technology road-Shenyang road signalized crossing is chosen as research object, intersection channelizing figure, intersection
Position and periphery situation are as shown in Figure 2,3.
The intersection peak period uses three phase signal timing plans, a length of 120s during the signal period, and southing is mouthful without a left side
Turn dedicated phase, intersection signal timing situation is as shown in Figure 4.
C, left-hand rotation dedicated phase research
Each entrance driveway flux and flow direction situation during investigating the intersection morning peak, by the flow threshold meter of left-hand rotation dedicated phase
Formula is calculated, the flow critical value that each import sets left-hand rotation dedicated phase is calculated, it is right that left-turn volume and flow critical value are carried out
Than acquired results such as table 2.
Table 2 is surveyed left-turn volume and is contrasted with flow threshold
By upper table, be computed southing cause for gossip survey left-turn volume more than set threshold value, meet setting left-hand rotation dedicated phase
Flow set condition.
It is as follows by investigation calibrating parameters result：Bicycle road saturation volume straight trip be 1525/hour, turn left for 1673/
Hour, and per phase signal, the loss time is 3s, therefore in the case of south is to left-hand rotation dedicated phase is set, each phase flow-rate ratio is big
It is small as shown in table 3.
Each phase flow-rate ratio situation of table 3
130s will be set in cycle, the new timing scheme in intersection will be calculated by upper table, obtain each phase signal timing parameter such as
Shown in table 4, shown in signal timing dial figure Fig. 5.
The north and south of table 4 sets the signal timing dial (s) after left-hand rotation dedicated phase
The determination of D, left turn phase installation warrants
With Shenyang-science and technology road as research object, east-west direction straight traffic flow qT1=0.1pcu/s, left turn traffic amount qL=
0.05pcu/s, North and South direction straight traffic flow qT2=0.14pcu/s, in the situation that North and South direction left turn traffic amount is gradually changed
Under, intersection mean delay before and after calculating and setting left-hand rotation dedicated phase, result of calculation is as shown in Figure 6.
As seen from the figure, when left turn traffic amount is less, delay value is relatively low under being not provided with left-hand rotation private situation, with left-hand rotation car
Flow gradually increases, and the mean delay of intersection vehicles gradually increases, when left turn traffic amount reaches 0.067pcu/s
(320.1pcu/h), delay value is equal in the case of two kinds, i.e. 0.067pcu/s is required southing mouthful left-turn volume critical value.
Change north and south straight traffic flow under above-mentioned signaling plan, obtain the critical value of different situations infralevoversion vehicle flowrate,
As shown in table 5.
The left-hand rotation dedicated phase of table 5 sets critical condition
According to above-mentioned result of calculation, in the case that thing through vehicles flow is constant, with to straight traffic flow increase,
The flow critical value for setting left-hand rotation dedicated phase declines.In the case where north and south straight traffic flow is 0.14pcu/s, will be between east and west
0.14pcu/s is increased to by 0.12pcu/s to straight traffic flow, left turn traffic amount critical value is obtained for 0.044pcu/s.
E, left turn phase set effect assessment
By used model and parameter, each imported car stream mean delay value before and after calculating and setting left-hand rotation dedicated phase, as a result
As shown in table 6.
The north and south of table 6 sets delay contrast table (s) before and after left-hand rotation dedicated phase
Before and after calculating and setting left-hand rotation dedicated phase, the delay size of signalized intersections after setting left-hand rotation dedicated phase, is intersected
Mouth mean delay is changed into 48.8 seconds from 44.6.It is as shown in the table for the criteria for classifying of signalized intersections service level, and China's service water
Flat evaluation is now divided into level Four, wherein, A, the B equivalent to HCM2000 grade of one-level, two grades equivalent to C grades, three-level is equivalent to D grades, four
Level is equivalent to E, F grade.As can be seen that to be delayed during for evaluation index, before and after setting left-hand rotation dedicated phase, the signalized intersections
Service level is three-level.Understand, be evaluation index to be delayed, before and after setting left-hand rotation dedicated phase, the intersection service level
It is three-level.
Table 7HCM2000 signalized intersections level of service division standards
Comprehensive improvement is set before and after east-west direction left-hand rotation dedicated phase, and the situation of change of each evaluation index is as shown in table 7.It is left
The setting for turning special phase effectively increases the traffic capacity of left turn lane, eliminates the intraoral Conflict delay of signal cross, although
Signal time distributing conception is changed into four phases from three phases, causes the delay of some Imported road and intersection mean delay increased, but
The vehicle delay time at stop of each entrance driveway is average.Therefore, the left turn traffic organization scheme can improve the current effect of intersection
Rate, realizes the effect of optimization wagon flow organizing.
Table 8 sets each evaluation index contrast before and after left-hand rotation dedicated phase
G, simulation result comparison and analysis
Using VISSIM simulation softwares, analysis is simulated to science and technology-Shenyang road intersection wagon flow ruuning situation, passed through
The parameters such as input signal timing, flow, speed, type of vehicle ratio, analogous diagram is as shown with 7.
After being input into each parameter, the evaluation indexes such as average queue length, delay, parking are chosen, Node evaluation is carried out, by more
Change signal timing dial, output respectively sets the evaluation index before and after left-hand rotation dedicated phase, as shown in table 9,10.
Table 9 sets evaluation index output before left-hand rotation dedicated phase
Table 10 sets the output of left-hand rotation dedicated phase post-evaluation index
By VISSIM simulation data results, intersection vehicles mean delay is 41.9s before setting left-hand rotation dedicated phase, is set
After left-hand rotation dedicated phase, intersection vehicles mean delay is 53.8s, and each import delay changing value as shown in table 11, can by result
Know, setting left-hand rotation dedicated phase makes each bogie car curtain coating, and size is more average by mistake, and effectively reduces prolonging for related left turn lane
By mistake.
Table 11 sets delay contrast (s) before and after left-hand rotation dedicated phase
Emulation gained delay is contrasted with theoretical calculation, theoretical calculation is Wei 44.6s, 48.8s, emulation gained knot
Fruit is respectively 41.9s, 53.8s, and relative error is respectively 6%, 10%, and difference is smaller, and acquired results meet requirement.
4) factor of evaluation precision is influenceed
L () left-hand rotation dedicated phase research aspect, the influence to pedestrian and non motorized vehicle considers not enough.
(2) parameter calibration is mainly according to the data preparation analysis gained being collected into, due to various regions driver and road travel permit
The difference of part, therefore gained model may not be suitable for other urban intersections.
(3) when left turn lane is queued up and overflowed, left turn lane treats further research with adjacent lane relation.
Claims (1)
1. the design and optimization method of a kind of signalized intersections left turn phase, it is characterised in that method is as follows：
First, the structure of traffic capacity model
By the maximum vehicle number n of the left-hand rotation car of intersection2Computing formula be：
N in formula2--- in the second by the maximum vehicle number (pcu/h) of the left-hand rotation car of intersection；
q1--- to straight traffic flow (pcu/h)；
The influence coefficient of limited priority in the maximum calculating by number of η --- left-hand rotation car；
The ratio of α --- Free-moving vehicle；
The average arrival rate of λ --- unit gap；
ta--- to there is critical gap value (s) that limited priority bottom left changes trains or buses to straight traffic；
The minimum time headway of τ --- straight traffic, takes 2s；
tf--- left-hand rotation car follows the time (s)；
The left-hand rotation car number for passing through intersection using green light interval is n3, and have：
N in formula3--- green light interim passes through the left turning vehicle number (pcu/h) of intersection；
ty--- green light time interval (s)；
I --- left turning vehicle sails out of the starting of conflict point, accelerates loss time (s)；
CIt is left--- left turn traffic continues through the average headway (s) of intersection；
Additionally, it is n to set the left turning vehicle number for passing through conflict point using green light initial stage in the signal period1, therefore, without special phase of turning left
When left turn lane the traffic capacity meet formula：
The traffic capacity (pcu/h) of C in formula --- left turn lane；
n1--- in the first manner by the left turning vehicle number of intersection；
n2--- in the second by the left turning vehicle number of intersection；
n3--- in a third way by the left turning vehicle number of intersection；
2nd, the structure of Delay Model
Under the conditions of left-hand rotation dedicated phase, left turning vehicle mainly includes that signal controls to prolong by the delay that signalized intersections are produced
By mistake, Conflict delay and other delays；
(I) signal Controlled drug-release is when signalized intersections are in low saturation traffic behavior, although the vehicle in different cycles is reached
Rate change at random, thereby increases and it is possible to queuing vehicle trapping phenomena occur, but will gradually disappear by after one or two cycle, being detained vehicle
Dissipate, i.e., in longer time section, entrance driveway vehicle arrives and departs from keeping relative equilibrium；
Signal Controlled drug-release temporal expression is as follows：
D in formula --- signal Controlled drug-release time (s)；
X --- saturation degree, is the ratio of track flow and the traffic capacity；
G --- Effective Green Time duration (s) in a cycle；
Q --- track flow (pcu/s)；
C --- cycle duration (s)；
(2) Conflict delay unsignalized intersection time road vehicles mean delay meets equation
D in formulaIt is secondary--- secondary road vehicles average delay (s)；
Dmin--- Adams are delayed, and secondary road vehicles minimum average B configuration is delayed (s)；
X --- saturation degree, is the ratio of track flow and the traffic capacity；
γ, ε --- constant, when vehicle is reached obeys Poisson distribution, γ=0；
Meet M3 distributions with time headway and obtain delay estimation formula：
Q in formulaIt is main--- the vehicle flowrate (pcu/h) of main roads；
The influence coefficient of limited priority in the maximum calculating by number of η --- left-hand rotation car；
The ratio of α --- Free-moving vehicle；
The average arrival rate of λ --- unit gap；
ta--- to there is critical gap value (s) that limited priority bottom left changes trains or buses to straight traffic；
The minimum time headway of τ --- straight traffic, takes 2s；
Therefore, under the conditions of being calculated without left-hand rotation dedicated phase according to above formula, delay of the left turning vehicle at conflict point；Wherein, it is left
Stream change trains or buses for secondary traffic flow, to being main traffic flow to straight traffic；
Q in formulaDirectly--- the vehicle flowrate (pcu/h) of Through Lane；
γ, ε --- constant, when vehicle is reached obeys Poisson distribution, γ=0；
The same above formula of remaining meaning of parameters；
Meanwhile, straight traffic Delay Model meets：
The influence coefficient of limited priority in the maximum calculating by number of η in formula --- left-hand rotation car；
The ratio of α --- Free-moving vehicle；
X --- saturation degree, is the ratio of track flow and the traffic capacity；
The average arrival rate of λ --- unit gap；
tf--- left-hand rotation car follows the time (s)；
ta--- to there is critical gap value (s) that limited priority bottom left changes trains or buses to straight traffic；
tc--- to there is critical gap value (s) that absolute priority bottom left changes trains or buses to straight traffic；
The minimum time headway of τ --- straight traffic, takes 2s；
(3) other delays
Left turning vehicle is also included by total traffic delay of signalized intersections：I) acceleration-deceleration delay, i.e., left turning vehicle is in stop line
Due to the delay for accelerating, slowing down and producing at place or conflict point；2) reaction delay, i.e. driver need to observe letter to ensure safety
Number intersection inside wagon flow ruuning situation and the delay that produces；3) intertwined point delay, i.e., left turning vehicle by needed after conflict point with
The vehicle of traveling collaborates in the same direction, the time loss produced because wait is given way；
3rd, in the city signal intersection of left-turning traffic outstanding problem, by inquiry when each import track magnitude of traffic flow, headstock
Parameter calibration is carried out to traffic capacity model and Delay Model away from, left turn traffic critical gap data, when certain entrance driveway unit is small
When the interior left turn traffic amount for passing through exceed left-hand rotation dedicated phase setting threshold value, then consider respective inlets road set up left-hand rotation it is special
Phase, by analyzing intersection practical operation situation, redistributes signal phase, and the intersection hour car drawn with reference to investigation
Flow, calculates each phase flow-rate ratio to redesign the signal timing dial of intersection, is improved to intersection ruuning situation.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107578630A (en) * | 2017-09-11 | 2018-01-12 | 合肥工业大学 | The method to set up that a kind of road grade crossing time great distance is drawn |
| 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 |
| CN108182537A (en) * | 2017-12-30 | 2018-06-19 | 国网天津市电力公司电力科学研究院 | Electric taxi quick charge station service characteristic analysis method based on queueing theory |
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| CN108831166A (en) * | 2018-07-31 | 2018-11-16 | 北京航空航天大学 | Intersection can be changed guided vehicle road function change method under bus or train route cooperative surroundings |
| CN111005275A (en) * | 2019-12-30 | 2020-04-14 | 东南大学 | Cooperative control optimization method for hook-shaped curved intersection signals |
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| CN112598902A (en) * | 2020-12-09 | 2021-04-02 | 安徽百诚慧通科技有限公司 | Intersection turning unbalance degree characterization method and device, electronic equipment and storage medium |
| CN112884194A (en) * | 2020-12-15 | 2021-06-01 | 苏州工业园区测绘地理信息有限公司 | Variable lane switching and signal timing method based on signalized intersection running condition |
| CN113362623A (en) * | 2021-06-04 | 2021-09-07 | 哈尔滨工业大学 | Continuous flow intersection left-turn non-motor vehicle traffic organization system and signal control method |
| CN113516855A (en) * | 2021-06-07 | 2021-10-19 | 东南大学 | Channelized design optimization method for parallel flow intersection |
| CN113963554A (en) * | 2021-12-02 | 2022-01-21 | 吉林大学 | Method for calculating left-turn lane traffic capacity under left-turn permission phase |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005125A (en) * | 2010-12-10 | 2011-04-06 | 东南大学 | Discharging method of vehicles passing intersection and related design method and control system |
| CN104064036A (en) * | 2014-06-19 | 2014-09-24 | 浙江大学 | Intersection traffic organization and signal timing dial method for tailgating opposite exit lane left-hand turning |
| CN106257554A (en) * | 2016-04-21 | 2016-12-28 | 长沙理工大学 | A kind of city thoroughfare prohibits left and protection phase place method to set up of turning left |
-
2017
- 2017-01-13 CN CN201710025613.4A patent/CN106683443A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005125A (en) * | 2010-12-10 | 2011-04-06 | 东南大学 | Discharging method of vehicles passing intersection and related design method and control system |
| CN104064036A (en) * | 2014-06-19 | 2014-09-24 | 浙江大学 | Intersection traffic organization and signal timing dial method for tailgating opposite exit lane left-hand turning |
| CN106257554A (en) * | 2016-04-21 | 2016-12-28 | 长沙理工大学 | A kind of city thoroughfare prohibits left and protection phase place method to set up of turning left |
Non-Patent Citations (2)
| Title |
|---|
| 关桢: "信号交叉口左转相位的设计和优化方法", 《中国优秀硕士学位论文全文数据库 工程科技II辑2011年》 * |
| 马万经等: "信号控制交叉口群左转交通协调设计方法", 《同济大学学报(自然科学版)》 * |
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| CN107578630A (en) * | 2017-09-11 | 2018-01-12 | 合肥工业大学 | The method to set up that a kind of road grade crossing time great distance is drawn |
| 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 |
| CN108182537A (en) * | 2017-12-30 | 2018-06-19 | 国网天津市电力公司电力科学研究院 | Electric taxi quick charge station service characteristic analysis method based on queueing theory |
| CN108182537B (en) * | 2017-12-30 | 2022-03-18 | 国网天津市电力公司电力科学研究院 | Queuing theory-based service characteristic analysis method for electric taxi quick charging station |
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| CN111179612A (en) * | 2019-12-27 | 2020-05-19 | 讯飞智元信息科技有限公司 | Method, device and equipment for generating intersection lane function |
| CN111179612B (en) * | 2019-12-27 | 2021-09-07 | 讯飞智元信息科技有限公司 | Method, device and equipment for generating intersection lane function |
| CN111005275B (en) * | 2019-12-30 | 2022-03-08 | 东南大学 | Cooperative control optimization method for hook-shaped curved intersection signals |
| CN111005275A (en) * | 2019-12-30 | 2020-04-14 | 东南大学 | Cooperative control optimization method for hook-shaped curved intersection signals |
| CN112598902A (en) * | 2020-12-09 | 2021-04-02 | 安徽百诚慧通科技有限公司 | Intersection turning unbalance degree characterization method and device, electronic equipment and storage medium |
| CN112884194A (en) * | 2020-12-15 | 2021-06-01 | 苏州工业园区测绘地理信息有限公司 | Variable lane switching and signal timing method based on signalized intersection running condition |
| CN112884194B (en) * | 2020-12-15 | 2024-04-02 | 园测信息科技股份有限公司 | Variable lane switching and signal timing method based on signal intersection operation condition |
| CN113362623A (en) * | 2021-06-04 | 2021-09-07 | 哈尔滨工业大学 | Continuous flow intersection left-turn non-motor vehicle traffic organization system and signal control method |
| CN113516855A (en) * | 2021-06-07 | 2021-10-19 | 东南大学 | Channelized design optimization method for parallel flow intersection |
| CN113963554A (en) * | 2021-12-02 | 2022-01-21 | 吉林大学 | Method for calculating left-turn lane traffic capacity under left-turn permission phase |
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