CN103440774B - The intersection signal timing method of individual signals cycle inner conversion track turning function - Google Patents
The intersection signal timing method of individual signals cycle inner conversion track turning function Download PDFInfo
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Abstract
The invention discloses the intersection signal timing method of a kind of individual signals cycle inner conversion track turning function, carry out conventional signal phase timing under the condition of first fixing in crossing lane function, calculate signal period C, each phase time T
1, T
2, T
3.Secondly, under the condition of satisfied basis checking, by improving the saturation degree of crossing Through Lane, thus reach and reduce left turn lane saturation degree, realize Through Lane time-space distribution and to turn left the transfer in track.Finally, by reducing phase time T
2realize reducing the total cycle C of signal, be optimized circulation tentative calculation, and service level evaluation is carried out to result of calculation, to realize effective utilization of crossing time-space distribution, reduce intersection signal mean delay.Visible, whether the present invention effectively can be suitable for current technology to existing crossing and effectively verify, and can realize by time remaining for phase place a certain in the individual signals cycle, null resource flexible utilization is in another phase place.
Description
Technical field
The present invention relates to the technical field of road traffic control, particularly relate to the intersection signal timing method of a kind of individual signals cycle inner conversion track turning function.
Background technology
In order to more make full use of the time-space distribution of crossing, by time remaining for phase place a certain in the individual signals cycle, null resource flexible utilization is in another phase place, improve the intersection traffic capacity, realize under the prerequisite not increasing track scale, the turning function in a certain import track is changed flexibly in the individual signals cycle, unnecessary time-space distribution is called to required part, improve traffic efficiency.On October 11st, 2012, the applicant has applied for that an application number is 201220519142.5, name is called the utility model (hereinafter referred to as " intersection system ") of " the intersection system of individual signals cycle inner conversion track turning function ", and obtains the authorization on March 13rd, 2013.
Under the letter control level-crossing condition of routine, its lane function and signal timing dial are metastable, and for described " intersection system ", within the individual signals cycle, the traffic organization in a certain track changes, both bear part straight-going traffic tissue, also bear part left-turning traffic tissue.Therefore, conventional signal timing dial method cannot be applicable to this " current technology ", should carry out technique extension and improvement on the basis of conventional cross mouth signal timing dial.
Summary of the invention
Because the above-mentioned deficiency of prior art, the present invention proposes a kind of intersection signal timing method being applicable to the individual signals cycle inner conversion track turning function of intersection system, effectively the intersection system whether existing crossing is suitable for individual signals cycle inner conversion track turning function is effectively verified, and can realize time remaining for phase place a certain in the individual signals cycle, null resource flexible utilization is in another phase place, improve the time-space distribution utilization ratio of crossing, improve intersection capacity, thus reduce intersection parking queuing and mean delay, especially being useful in the patent No. is CN201220519142.5, name is called in " the intersection system of individual signals cycle inner conversion track turning function ".
For achieving the above object, the invention provides the intersection signal timing method of a kind of individual signals cycle inner conversion track turning function, comprise the steps:
Step S101, carries out normal signal timing design:
Calculate intersection signal cycle calendar time C, craspedodrome phase place effective green time T
1, left turn phase effective green time T
2, right-hand rotation phase place effective green time T
3, and keep straight on, turn left, the maximal value of the saturation degree in right-hand rotation direction is followed successively by X
1, X
2, X
3and delay value is followed successively by D
1, D
2, D
3, because existing normal signal timing distributes based on " phase place isosaturation " target, therefore X
1≈ X
2≈ X
3;
Step S102, carries out basis checking:
1. X is verified
1<0.8
Be: carry out next step;
No: described " individual signals cycle inner conversion track turning function " this crossing inapplicable, stop calculating;
2. T is verified
1>=T
row 1+ T
oK
Be: carry out next step;
No: described " individual signals cycle inner conversion track turning function " this crossing inapplicable, stop calculating;
Wherein,
T
row 1: craspedodrome phase place T
1green light starts moment, and the queuing vehicle of reversible lame and the driving vehicle this moment sailed in " lane function identification district ", can sail out of the time of stop line completely;
T
oK: vehicle by " lane function confirmation line " to the time of sailing out of downstream stop line;
Step S103, calculates T
11:
Specify Through Lane target saturation degree X
directly=0.8, at intersection signal cycle calendar time C, each phase place effective green time T
1, T
2, T
3basis on, calculate traffic organization T
11the time in stage: T
11;
According to formula 2S
directly(T
1/ C) X
1=Q
directlyand S
directly[(T
1+ T
11)/C] X
directly=Q
directly,
Draw T
11=(2X
1-X
directly) T
1/ X
directly; S
directlyspecial entrance driveway saturation volume of keeping straight on, Q
directly: East and West direction straightgoing vehicle arrival peak period amount;
Step S104, checking T
11:
Checking T
11>=T
row 1
Be: adopt T
11
No: T
11adopt T
row 1
Step S105, calculates T
12and T
row 2:
T
12＝T
1-T
11
T
row 2for thing left turn phase T
2green light starts moment, and the queuing vehicle of reversible lame and the driving vehicle this moment sailed in " lane function identification district ", can sail out of the time (s) of stop line completely; T
row 2by T
12and entrance driveway vehicle arrives the known regularity of distribution and carries out calculating (s);
Step S106, calculates T
21:
T
21=T
2-T
oK;
Step S107, checking T
21:
Checking T
21>=T
row 2
Then calculate the maximum saturation of adjustment rear left veer:
X
2′＝T
2X
2/(T
2+T
21)
No, then in units of 1 second, raise T
11, lower T
12, calculate T
row 2, make T
row 2=T
21, then calculate the maximum saturation in the rear craspedodrome of adjustment and left-hand rotation direction:
X
1′＝2T
1X
1/(T
1+T
11′)
X
2'=T
2x
2/ (T
2+ T
row 2)
Calculate since then, signal period calendar time C, effective green time T
1, T
2all constant, in traffic organization, add T
11, T
12, T
21, T
22, wherein T
22=T
2-T
21, Through Lane saturation degree X
1improve, left-hand rotation saturation degree X
2reduce, T
3remain unchanged, its saturation degree X
3also constant;
Step S108, optimizes circulation tentative calculation:
If 1. step S104 is verified as "Yes", step S107 is verified as "Yes";
Then in units of 1 second, reduce T
2, and synchronous minimizing cycle C, T
1, T
3, T
11, T
12remain unchanged, start the tentative calculation that circulates:
(I) T is calculated
21: T
21'=T
2'-T
oK
(II) T is verified
21'>=T
row 2
Be: the maximum saturation then calculating the rear all directions of new round signal adjustment:
X
1"=Q
directlyc '/S
directly(T
1+ T
11)
X
2"=Q
leftc '/S
left(T
2'+T
21')
X
3"=Q
north and southc '/S
north and southt
3
Wherein,
X
1", X
2", X
3" be maximum saturation in thing craspedodrome after the adjustment of new round signal, thing left-hand rotation, North and South direction;
C ': cycle duration (s) after the adjustment of new round signal;
Q
left: East and West direction left-hand rotation peak period car arrival amount (pcu/h);
Q
north and south: north-south vehicle arrival amount peak period (pcu/h);
S
left: special entrance driveway saturation volume (pcu/h) of turning left;
S
north and south: north-south entrance driveway saturation volume (pcu/h);
No: then circulation tentative calculation stops;
(III) circulation tentative calculation is until X
2" ≈ X
3" or complete when being verified as "No";
If 2. step S104 is verified as "Yes", step S107 is verified as "No":
Then press X
1'=2T
1x
1/ (T
1+ T
11') and X
2'=T
2x
2/ (T
2+ T
row 2) calculate X
1', X
2', calculating completes;
If 3. step S104 is verified as "No", step S107 is verified as "Yes":
Carry out circulation tentative calculation 1., but T
11adopt T
row 1, namely if not-be both-be, but T
11=T
row 1;
If 4. step S104 is verified as "No", step S107 is verified as "No":
Then press X
1'=2T
1x
1/ (T
1+ T
11') and X
2'=T
2x
2/ (T
2+ T
row 2) calculate X
1', X
2', calculating completes;
Step S109, calculates and incurs loss through delay D
1', D
2', D
3', service for checking credentials level:
Conveniently intersection signal timing formula, calculates each phase place after adjustment and incurs loss through delay D
1', D
2', D
3', and verify intersection service level:
If compared with conventional timing, service level is in same grade, or still belongs to more than E level after downgrading, then described " individual signals cycle inner conversion track turning function " can be useful on this crossing, and draw signal timing dial figure, timing terminates;
If intersection service level is reduced to below F level, then described " individual signals cycle inner conversion track turning function " is inapplicable on this crossing, and timing terminates.
The beneficial effect that the intersection signal timing method of individual signals cycle inner conversion track of the present invention turning function has is: the present invention expands and improves existing conventional cross message timing method, overcome above-mentioned the deficiencies in the prior art, the present invention is applicable to intersection system, can effectively effectively verify the intersection system whether existing crossing is suitable for individual signals cycle inner conversion track turning function, and can realize time remaining for phase place a certain in the individual signals cycle, null resource flexible utilization is in another phase place, improve the time-space distribution utilization ratio of crossing, improve intersection capacity, thus reduce intersection parking queuing and mean delay, especially being useful in the patent No. is CN201220519142.5, name is called in " the intersection system of individual signals cycle inner conversion track turning function ".
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the intersection signal timing method of the present embodiment individual signals cycle inner conversion track turning function.
Fig. 2 is conventional cross mouth schematic diagram.
Fig. 3 is the step S102 enlarged diagram in Fig. 1.
Fig. 4 is the step S104 enlarged diagram in Fig. 1.
Fig. 5 is the step S108 enlarged diagram in Fig. 1.
Fig. 6 is the step S109 enlarged diagram in Fig. 1.
Embodiment
Fig. 1 is the process flow diagram of the intersection signal timing method of the present embodiment individual signals cycle inner conversion track turning function.Shown in composition graphs 1 and Fig. 3 to Fig. 6, the present embodiment proposes the intersection signal timing method of a kind of individual signals cycle inner conversion track turning function, comprises the steps:
Step S101, carries out normal signal timing design:
Calculate intersection signal cycle calendar time C, craspedodrome phase place effective green time T
1, left turn phase effective green time T
2, right-hand rotation phase place effective green time T
3, and keep straight on, turn left, the maximal value of the saturation degree in right-hand rotation direction is followed successively by X
1, X
2, X
3and delay value is followed successively by D
1, D
2, D
3, because existing normal signal timing distributes based on " phase place isosaturation " target, therefore X
1≈ X
2≈ X
3;
Step S102, carries out basis checking:
1. X is verified
1<0.8
Be: carry out next step;
No: described " individual signals cycle inner conversion track turning function " this crossing inapplicable, stop calculating;
2. T is verified
1>=T
row 1+ T
oK
Be: carry out next step;
No: described " individual signals cycle inner conversion track turning function " this crossing inapplicable, stop calculating;
Wherein,
T
row 1: craspedodrome phase place T
1green light starts moment, and the queuing vehicle of reversible lame and the driving vehicle this moment sailed in " lane function identification district ", can sail out of the time of stop line completely;
T
oK: vehicle by " lane function confirmation line " to the time of sailing out of downstream stop line;
Step S103, calculates T
11:
Specify Through Lane target saturation degree X
directly=0.8, at intersection signal cycle calendar time C, each phase place effective green time T
1, T
2, T
3basis on, calculate traffic organization T
11the time in stage: T
11;
According to formula 2S
directly(T
1/ C) X
1=Q
directlyand S
directly[(T
1+ T
11)/C] X
directly=Q
directly,
Draw T
11=(2X
1-X
directly) T
1/ X
directly; S
directlyspecial entrance driveway saturation volume of keeping straight on, Q
directly: East and West direction straightgoing vehicle arrival peak period amount;
Step S104, checking T
11:
Checking T
11>=T
row 1
Be: adopt T
11
No: T
11adopt T
row 1
Step S105, calculates T
12and T
row 2:
T
12＝T
1-T
11
T
row 2for thing left turn phase T
2green light starts moment, and the queuing vehicle of reversible lame and the driving vehicle this moment sailed in " lane function identification district ", can sail out of the time (s) of stop line completely; T
row 2by T
12and entrance driveway vehicle arrives the known regularity of distribution and carries out calculating (s);
Step S106, calculates T
21:
T
21=T
2-T
oK;
Step S107, checking T
21:
Checking T
21>=T
row 2
Then calculate the maximum saturation of adjustment rear left veer:
X
2′＝T
2X
2/(T
2+T
21)
No, then in units of 1 second, raise T
11, lower T
12, calculate T
row 2, make T
row 2=T
21, then calculate the maximum saturation in the rear craspedodrome of adjustment and left-hand rotation direction:
X
1′＝2T
1X
1/(T
1+T
11′)
X
2'=T
2x
2/ (T
2+ T
row 2)
Calculate since then, signal period calendar time C, effective green time T
1, T
2all constant, in traffic organization, add T
11, T
12, T
21, T
22, wherein T
22=T
2-T
21, Through Lane saturation degree X
1improve, left-hand rotation saturation degree X
2reduce, T
3remain unchanged, its saturation degree X
3also constant;
Step S108, optimizes circulation tentative calculation:
If 1. step S104 is verified as "Yes", step S107 is verified as "Yes";
Then in units of 1 second, reduce T
2, and synchronous minimizing cycle C, T
1, T
3, T
11, T
12remain unchanged, start the tentative calculation that circulates:
(I) T is calculated
21: T
21'=T
2'-T
oK
(II) T is verified
21'>=T
row 2
Be: the maximum saturation then calculating the rear all directions of new round signal adjustment:
X
1"=Q
directlyc '/S
directly(T
1+ T
11)
X
2"=Q
leftc '/S
left(T
2'+T
21')
X
3"=Q
north and southc '/S
north and southt
3
Wherein,
X
1", X
2", X
3" be maximum saturation in thing craspedodrome after the adjustment of new round signal, thing left-hand rotation, North and South direction;
C ': cycle duration (s) after the adjustment of new round signal;
Q
left: East and West direction left-hand rotation peak period car arrival amount (pcu/h);
Q
north and south: north-south vehicle arrival amount peak period (pcu/h);
S
left: special entrance driveway saturation volume (pcu/h) of turning left;
S
north and south: north-south entrance driveway saturation volume (pcu/h);
No: then circulation tentative calculation stops;
(III) circulation tentative calculation is until X
2" ≈ X
3" or complete when being verified as "No";
If 2. step S104 is verified as "Yes", step S107 is verified as "No":
Then press X
1'=2T
1x
1/ (T
1+ T
11') and X
2'=T
2x
2/ (T
2+ T
row 2) calculate X
1', X
2', calculating completes;
If 3. step S104 is verified as "No", step S107 is verified as "Yes":
Carry out circulation tentative calculation 1., but T
11adopt T
row 1, namely if not-be both-be, but T
11=T
row 1;
If 4. step S104 is verified as "No", step S107 is verified as "No":
Then press X
1'=2T
1x
1/ (T
1+ T
11') and X
2'=T
2x
2/ (T
2+ T
row 2) calculate X
1', X
2', calculating completes;
Step S109, calculates and incurs loss through delay D
1', D
2', D
3', service for checking credentials level:
Conveniently intersection signal timing formula, calculates each phase place after adjustment and incurs loss through delay D
1', D
2', D
3', and verify intersection service level:
If compared with conventional timing, service level is in same grade, or still belongs to more than E level after downgrading, then described " individual signals cycle inner conversion track turning function " can be useful on this crossing, and draw signal timing dial figure, timing terminates;
If intersection service level is reduced to below F level, then described " individual signals cycle inner conversion track turning function " is inapplicable on this crossing, and timing terminates.
Fig. 2 is conventional cross mouth schematic diagram.Concrete, the present embodiment carries out intersection signal timing calculating to the conventional cross mouth shown in Fig. 2, and wherein, each lane traffic flow (/ hour) information of known described conventional cross mouth is as shown in table 1:
Each lane traffic flow information of table 1 conventional cross mouth
One, according to conventional cross message timing method, following parameter values is obtained:
Throughput ratio summation: Y=max{y
1+ y
2+ y
3}=0.57
Optimal period duration C
0=L/ (1-Y)=21s, for meeting the pedestrian's street crossing shortest time, chooses cycle duration C=100s
Total effective green time G
e=C-L=100s-9s=91s
T
1=Ge*max (y
1)/Y=91*0.18/0.57=28s (i.e. thing craspedodrome phase place effective green time)
T
2=Ge*max (y
2)/Y=91*0.25/0.57=40s (i.e. thing left turn phase effective green time)
T
3=Ge*max (y
3)/Y=91*0.14/0.57=28s (i.e. north and south master phase effective green time)
X
1＝q
1/CAP
1＝600/(2*1650*0.28)＝0.64
X
2＝q
2/CAP
2＝380/(1550*0.40)＝0.62
X
3＝q
3/CAP
3＝230/(1596*0.23)＝0.63
D
1: thing Through Lane average signal delay 31.5s;
D
2: thing left turn lane average signal delay 24.3s;
D
3: track, north-south average signal delay 26.7s;
D: crossing average signal delay is 25s.
Be more than conveniently intersection signal timing formula, calculate green time and the evaluation index such as saturation degree, delay of each signal phase.
Two, the intersection signal timing method in conjunction with the individual signals cycle inner conversion track turning function of the present embodiment carries out intersection signal timing, and shown in composition graphs 1, concrete steps are as follows:
Known parameters:
T
row 1: 16s (certification length in track is 80m, and the speed of a motor vehicle is estimated to get by 30km/h temporarily, can determine in actual applications according to field condition)
T
row 2: 10s (track queue length is 60m, and the speed of a motor vehicle is estimated to get by 30km/h temporarily, can determine in actual applications according to field condition)
T
oK: 9s (speed of a motor vehicle is estimated to get by 30km/h temporarily, can determine in actual applications according to field condition)
S
directly: 1650 (pcu/h);
Q
directly: 600 (pcu/h);
S
left: 1550 (pcu/h);
Q
left: 380 (pcu/h);
S
a straight left side: 1596 (pcu/h);
Q
a straight left side: 230 (pcu/h);
(1) current technological adaptability checking
X
1=0.64<0.8 meets the demands
T
1=28s>T
row 1+ T
oK=16s+9s=25s meets the demands
(2) T is calculated
11
Suppose X
directly=0.8
T
11=(2X
1-X
directly) T
1/ X
directly=(2*0.64-0.8) * 28/0.8=16.8s ≈ 17s>T
row 1=16s
T
12＝T
1-T
11＝28-17＝11s
(3) T is calculated
12
T
21=T
2-T
oK=40-9=31s>T
row 2=10s
T
22＝T
2-T
21＝40-31＝9s
Calculate the saturation degree after adjustment
X
1′＝2T
1X
1/(T
1+T
11)＝2*28*0.64/(28+17)＝0.796
X
2'=T
2x
2/ (T
2+ T
row 2)=40*0.62/ (40+10)=0.496
(4) optimization cycle cycle calculations
Be that unit reduces left turn phase T according to 1s
2duration, keep T
1, T
3constant, thus reduce cycle duration, improve the saturation degree of thing left turn lane.
By circulation tentative calculation, determine T
2when being reduced to 28s, X
2with X
3reach balanced.
C′＝C-12S＝88(s)；
X
1"=Q
directlyc '/S
directly(T
1+ T
11)=900*88/ [1650* (28+17)]=0.711
X
2"=Q
leftc '/S
left(T
2'+T
21')=380*88/ [1550* (28+19)]=0.459
X
3"=Q
north and southc '/S
north and southt
3=230*88/ (1596*28)=0.452
Calculate the crossing Signal control delay after adjustment:
D
1': thing Through Lane average signal delay 28.15s;
D
2': thing left turn lane average signal delay 25.33s;
D
3': track, north-south average signal delay 19.1s;
D′：22s；
Thus each phase time obtaining being applicable to current technology is:
T
1: 28s, wherein T
11for 17s, T
12for 11s;
T
2': 28s, wherein T
21' be 19s, T
22' be 9s;
T
3：28s
Three, be the timing of conventional cross mouth and the crossing timing of applying the present embodiment below, the contrast of intersection saturation degree and delay:
Table 2 saturation degree contrasts
| Title | Saturation degree X1 | Saturation degree X2 | Saturation degree X3 | Average staturation |
| The timing of conventional cross mouth | 0.64 | 0.62 | 0.63 | 0.62 |
| Current technology crossing timing | 0.71 | 0.46 | 0.45 | 0.49 |
Contrast incured loss through delay by table 3
Find out thus, after adopting " current technology ", crossing average staturation reduces, and incurs loss through delay and reduces, and sufficient proof " current technology " effectively utilizes the effect of time-space distribution.
The correlation parameter that the present embodiment relates to is described as follows:
T
11: in thing craspedodrome phase place, changeable driveway is the time that through vehicles passes through;
T
12: in thing craspedodrome phase place, changeable driveway is the time that left turning vehicle is waited for;
T
21: in thing left turn phase, changeable driveway is the time that left turning vehicle passes through;
T
21: in thing left turn phase, changeable driveway is the time that through vehicles is waited for;
T
row 1: in thing craspedodrome phase place, green light starts moment, and the queue length of changeable driveway and the driving vehicle this moment sailed in " lane function identification district ", can sail out of the time of stop line completely;
T
oK: vehicle by " lane function confirmation line " to the time of sailing out of downstream stop line;
X
directly: craspedodrome dedicated Lanes allow maximum saturation, this value 0.8;
S
directly: special entrance driveway saturation volume (pcu/h) of keeping straight on;
S
left: special entrance driveway saturation volume (pcu/h) of turning left;
S
north and south: north-south entrance driveway saturation volume (pcu/h);
Q
directly: East and West direction straight-going traffic arrival amount peak period (pcu/h);
Q
left: East and West direction left-hand rotation peak period car arrival amount (pcu/h);
Q
north and south: north-south vehicle arrival amount peak period (pcu/h);
T
row 2: thing left turn phase T
2green light starts moment, and the queuing vehicle of changeable driveway and the driving vehicle this moment sailed in " lane function identification district ", can sail out of the time (s) of stop line completely.
X
1': the Through Lane saturation degree after the 1st adjustment;
X
2': the left turn lane saturation degree after the 1st adjustment;
X
1", X
2", X
3": be maximum saturation in thing craspedodrome after the 2nd signal adjustment, thing left-hand rotation, North and South direction;
C ': cycle duration (s) after the adjustment of new round signal;
D
1': thing Through Lane average signal delay after adjustment;
D
2': thing left turn lane average signal delay after adjustment;
D
3': track, north-south average signal delay after adjustment;
D ': the average signal delay of whole crossing after adjustment.
It is CN201220519142.5 that this specific embodiment is especially applicable to being applied to the patent No., name is called in " the intersection system of individual signals cycle inner conversion track turning function ", described current technology is described " individual signals cycle inner conversion track turning function ", specifically can be summarized as within the individual signals cycle, in the craspedodrome current green end of phase place (time that the green light closes to an end) period, the through vehicles density of certain entrance driveway reduces, and be now " wait of turning left " function by " keeping straight on current " functional shift of wherein a certain Through Lane; Pass through the phase place initial stage in ensuing left-hand rotation, this track then extends for left-hand rotation function and passes through.Can in conjunction with the patent No. for CN201220519142.5 to authorize the specific embodiment in text and the specific descriptions described in accompanying drawing, this place just repeats no more.
Therefore the present embodiment carries out conventional signal phase timing first fix the condition on (1 left, 2 straight, 1 right sides) in crossing lane function under, calculates signal period C, each phase time T
1, T
2, T
3.
Secondly, under the condition of satisfied basis checking, by improving the saturation degree of crossing Through Lane, thus reach and reduce left turn lane saturation degree, realize Through Lane time-space distribution and to turn left the transfer in track.
Finally, by reducing phase time T
2realize reducing the total cycle C of signal, be optimized circulation tentative calculation, and service level evaluation is carried out to result of calculation, to realize effective utilization of crossing time-space distribution, reduce intersection signal mean delay.
In sum, the present embodiment is expanded and is improved existing conventional cross message timing method, overcome above-mentioned the deficiencies in the prior art, be applicable to intersection system, can effectively effectively verify the intersection system whether existing crossing is suitable for individual signals cycle inner conversion track turning function, and can realize time remaining for phase place a certain in the individual signals cycle, null resource flexible utilization is in another phase place, improve the time-space distribution utilization ratio of crossing, improve intersection capacity, thus reduce intersection parking queuing and mean delay, especially being useful in the patent No. is CN201220519142.5, name is called in " the intersection system of individual signals cycle inner conversion track turning function ".
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technician in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. an intersection signal timing method for individual signals cycle inner conversion track turning function, is characterized in that
In turn include the following steps:
Step S101, carries out normal signal timing design:
Calculate intersection signal cycle calendar time C, craspedodrome phase place effective green time T
1, left turn phase effective green time T
2, right-hand rotation phase place effective green time T
3, and keep straight on, turn left, the maximal value of the saturation degree in right-hand rotation direction is followed successively by X
1, X
2, X
3and delay value is followed successively by D
1, D
2, D
3, because existing normal signal timing distributes based on " phase place isosaturation " target, therefore X
1≈ X
2≈ X
3;
Step S102, carries out basis checking:
1. X is verified
1<0.8
Be: carry out next step;
No: described " individual signals cycle inner conversion track turning function " this crossing inapplicable, stop calculating;
2. T is verified
1>=T
row 1+ T
oK
Be: carry out next step;
No: described " individual signals cycle inner conversion track turning function " this crossing inapplicable, stop calculating;
Wherein,
T
row 1: craspedodrome phase place T
1green light starts moment, and the queuing vehicle of reversible lame and the driving vehicle this moment sailed in " lane function identification district ", can sail out of the time of stop line completely;
T
oK: vehicle by " lane function confirmation line " to the time of sailing out of downstream stop line;
Step S103, calculates T
11:
Specify Through Lane target saturation degree X
directly=0.8, at intersection signal cycle calendar time C, each phase place effective green time T
1, T
2, T
3basis on, calculate traffic organization T
11the time in stage: T
11;
According to formula 2S
directly(T
1/ C) X
1=Q
directlyand S
directly[(T
1+ T
11)/C] X
directly=Q
directly,
Draw T
11=(2X
1-X
directly) T
1/ X
directly; S
directlyspecial entrance driveway saturation volume of keeping straight on, Q
directly: East and West direction straightgoing vehicle arrival peak period amount;
Step S104, checking T
11:
Checking T
11>=T
row 1
Be: adopt T
11
No: T
11adopt T
row 1
Step S105, calculates T
12and T
row 2:
T
12＝T
1-T
11
T
row 2for thing left turn phase T
2green light starts moment, and the queuing vehicle of reversible lame and the driving vehicle this moment sailed in " lane function identification district ", can sail out of the time s of stop line completely; T
row 2by T
12and entrance driveway vehicle arrives the known regularity of distribution and carries out reckoning s;
Step S106, calculates T
21:
T
21=T
2-T
oK;
Step S107, checking T
21:
Checking T
21>=T
row 2
Then calculate the maximum saturation of adjustment rear left veer:
X
2′＝T
2X
2/(T
2+T
21)
No, then in units of 1 second, raise T
11, lower T
12, calculate T
row 2, make T
row 2=T
21, then calculate the maximum saturation in the rear craspedodrome of adjustment and left-hand rotation direction:
X
1′＝2T
1X
1/(T
1+T
11′)
X
2'=T
2x
2/ (T
2+ T
row 2)
Calculate since then, signal period calendar time C, effective green time T
1, T
2all constant, in traffic organization, add T
11, T
12, T
21, T
22, wherein T
22=T
2-T
21, Through Lane saturation degree X
1improve, left-hand rotation saturation degree X
2reduce, T
3remain unchanged, its saturation degree X
3also constant;
Step S108, optimizes circulation tentative calculation:
If 1. step S104 is verified as "Yes", step S107 is verified as "Yes";
Then in units of 1 second, reduce T
2, and synchronous minimizing cycle C, T
1, T
3, T
11, T
12remain unchanged, start the tentative calculation that circulates:
(I) T is calculated
21: T
21'=T
2'-T
oK
(II) T is verified
21'>=T
row 2
Be: the maximum saturation then calculating the rear all directions of new round signal adjustment:
X
1"=Q
directlyc '/S
directly(T
1+ T
11)
X
2"=Q
leftc '/S
left(T
2'+T
21')
X
3"=Q
north and southc '/S
north and southt
3
Wherein,
X
1", X
2", X
3" be maximum saturation in thing craspedodrome after the adjustment of new round signal, thing left-hand rotation, North and South direction;
C ': cycle duration s after the adjustment of new round signal;
Q
left: East and West direction left-hand rotation peak period car arrival amount pcu/h;
Q
north and south: north-south vehicle arrival peak period amount pcu/h;
S
left: turn left special entrance driveway saturation volume pcu/h;
S
north and south: north-south entrance driveway saturation volume pcu/h;
No: then circulation tentative calculation stops;
(III) circulation tentative calculation is until X
2" ≈ X
3" or complete when being verified as "No";
If 2. step S104 is verified as "Yes", step S107 is verified as "No":
Then press X
1'=2T
1x
1/ (T
1+ T
11') and X
2'=T
2x
2/ (T
2+ T
row 2) calculate X
1', X
2', calculating completes;
If 3. step S104 is verified as "No", step S107 is verified as "Yes":
Carry out circulation tentative calculation 1., but T
11adopt T
row 1, namely if not-be both-be, but T
11=T
row 1;
If 4. step S104 is verified as "No", step S107 is verified as "No":
Then press X
1'=2T
1x
1/ (T
1+ T
11') and X
2'=T
2x
2/ (T
2+ T
row 2) calculate X
1', X
2', calculating completes;
Step S109, calculates and incurs loss through delay D
1', D
2', D
3', service for checking credentials level:
Conveniently intersection signal timing formula, calculates each phase place after adjustment and incurs loss through delay D
1', D
2', D
3', and verify intersection service level:
If compared with conventional timing, service level is in same grade, or still belongs to more than E level after downgrading, then described " individual signals cycle inner conversion track turning function " can be useful on this crossing, and draw signal timing dial figure, timing terminates;
If intersection service level is reduced to below F level, then described " individual signals cycle inner conversion track turning function " is inapplicable on this crossing, and timing terminates.
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| CN104867335A (en) * | 2014-02-24 | 2015-08-26 | 王群力 | Intelligent traffic signal control system |
| CN104036645B (en) * | 2014-06-03 | 2015-11-18 | 东南大学 | Based on the intersection signal control method of changeable driveway |
| CN104598741B (en) * | 2015-01-26 | 2017-10-17 | 上海交通大学 | A kind of construction method of track saturation degree forecast model |
| CN106128103B (en) * | 2016-07-26 | 2018-06-19 | 北京市市政工程设计研究总院有限公司 | A kind of intersection Turning movement distribution method and device based on recursion control step by step |
| US11080267B2 (en) * | 2018-08-31 | 2021-08-03 | Waymo Llc | Validating road intersections |
| CN109410574B (en) * | 2018-10-29 | 2021-05-11 | 东南大学 | Phase-phase signal control scheme-oriented timing parameter optimization method |
| CN109686084B (en) * | 2018-12-11 | 2021-02-26 | 东南大学 | Signal control optimization target switching system based on intersection average saturation |
| CN113240938B (en) * | 2018-12-23 | 2022-03-04 | 合肥工业大学 | Method for intelligently changing urban traffic light phase sequence and urban comprehensive intelligent traffic system thereof |
| CN111161550B (en) * | 2020-01-02 | 2023-06-30 | 合肥学院 | Intersection control time period and phase timing design and closed loop verification method |
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