CN102982688A - Regional traffic signal control method based on arterial road coordination priority - Google Patents
Regional traffic signal control method based on arterial road coordination priority Download PDFInfo
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Abstract
The invention relates to a regional traffic signal control method based on arterial road coordination priority. The regional traffic signal control method based on the arterial road coordination priority solves the problem that in the prior art, a regional traffic control method is not suitable for a road traffic facility present situation of Chinese cities. The regional traffic signal control method based on the arterial road coordination priority comprises the following steps that an arterial road of a region is guaranteed, different phase position allocation schemes are respectively selected for road crossings in the region according to characteristics of the road crossings, arterial road and non-arterial-road crossings are sequentially conducted phase difference optimizing, starting time of phase position green lights of the road crossings are sequentially guaranteed, and traffic signal timing of the region is completed. The regional traffic signal control method based on the arterial road coordination priority has the advantages that optimizing of a complex regional traffic face control system is transformed to optimizing of a linear control system, complexity of regional traffic signal optimizing is reduced, the efficiency of regional traffic signal controlling is greatly improved, the arterial road of a big traffic flow in the region is considered in a key mode, and a primary and secondary distinction optimization order enables the whole regional traffic to obtain the optimal controlling effect.
Description
Technical field
The present invention relates to a kind of traffic signals control technology field, especially relate to a kind of based on the preferential regional traffic signal control method of major trunk roads coordination.
Background technology
In order to solve day by day serious Urban Traffic Jam Based, the supvr of urban transportation and correlative study person have proposed a variety of solutions, and wherein the most direct method is improved more road and solved problem by building in the city exactly., because the restriction of city space capacity, this method more and more is difficult to be suitable in modern city.Along with the development of the multiple technologies such as infotech, the communication technology, control technology, sensor technology and system synthesis technology, the intelligent transportation control technology more and more is subject to city manager's attention, and has obtained a lot of useful achievements in many cities.And for the intelligent transportation control technology, the control of the traffic signals of intersection then is a wherein important ring.
Difference according to the control method real-time, traffic signal control method can be divided into time control method and self-adaptation control method, and these two kinds of methods can be subdivided into single intersection signal control method, arterial traffic signal control method and regional traffic signal control method according to the control area again.No matter be which kind of traffic signal control method, final optimum results only has the cycle, split and three parameters of phase differential (the single intersection signal controlling does not need to optimize phase differential), by these three parameters the traffic lights of each crossing is configured the traffic signals control that just can realize the intersection.At the traffic signals control field, every technology of single intersection signal control method and arterial traffic signal control method is comparative maturity, and the regional traffic signal controlling then also has suitable development space.
At present more famous regional traffic signal control method has TRANSYT(Traffic Network Study Tool: transportation network learning tool system), SCOOT(Split, and Cycle and Offset Optimization Technique: split, cycle and offset optimization technology) and SCATS(Sydney Coordinated Adaptive Traffic System: Sydney coordination self-adaptation traffic system).TRANSYT is a kind of timing control system, and SCOOT is based on the traffic self-adaptation control method of TRANSYT model, and SCATS then is a kind of Real-time adaptive traffic control system that does not set up traffic model.
Said method all is to be proposed by the research institution of developed countries, is applied to external ripe road traffic facility and has good control effect.But, because China city is also in the middle of development, the road traffic facility in city and traffic law yet are in the perfect process of development mostly, all difference very large with external existence of condition of road surface or the mixed traffic flow of actual complex, can not satisfy the needed more harsh transportation condition of the good operation of these methods, these methods can not adapt to the current situation of traffic in China city well.
Summary of the invention
The present invention mainly is the problem that area traffic control method is not suitable with China's urban highway traffic equipment in the solution prior art, a kind of China urban highway traffic equipment of can adapting to is provided, solve the reasonably optimizing problem of the unbalanced traffic flow that exists in the city, that improves simultaneously efficient that the regional traffic signal timing dial optimizes coordinates preferential regional traffic signal control method based on major trunk roads.
Above-mentioned technical matters of the present invention is mainly solved by following technical proposals: a kind of based on the preferential regional traffic signal control method of major trunk roads coordination, described zone is a urban highway traffic zone that comprises some continuous adjacent crossing, and the method may further comprise the steps:
A. be crucial crossing according to a certain crossing in the traffic flow data definite area, and take crucial crossing as benchmark, the major trunk roads that formed by some continuous crossings in the definite area;
B. preset some crossings four phase configuration schemes, according to the feature of crossing different allocation plans is selected respectively in each crossing in the zone;
C. successively offset optimization is carried out in major trunk roads and non-major trunk roads crossing in the zone, calculate successively the phase differential between the neighbour's interior adjacent non-major trunk roads crossing of phase differential and zone of adjacent major trunk roads crossing according to the method for main line offset optimization;
D. according to the phasing scheme of crossing offset optimization sequencing and each crossing configuration in the zone, determine successively the phase place green light start-up time of each crossing, finish the regional traffic signal timing dial.
The present invention is converted into the optimization problem of line control system with the optimization problem of the regional traffic face control system of complexity, has reduced the complexity of regional traffic signal optimizing process, significantly improves the efficient of regional traffic signal controlling; Emphasis of the present invention has been considered the larger major trunk roads of the magnitude of traffic flow in the zone, and the optimization of making a distinction between the important and the lesser one order is so that whole regional traffic can access more superior control effect.
As a kind of preferred version, the phase differential in the phase differential between the adjacent major trunk roads crossing and the zone between the adjacent non-major trunk roads crossing passes through
Calculate, wherein
Be the relative phase difference between two Adjacent Intersections x and the crossing y,
Be the time average from crossing x to Adjacent Intersections y stroke, S
Y, xBe the distance between corresponding two Adjacent Intersections,
For vehicle from crossing x to the average overall travel speed the Adjacent Intersections y;
This offset optimization is optimized adjacent major trunk roads crossing, adjacent major trunk roads crossing and non-major trunk roads crossing, adjacent non-major trunk roads crossing successively, and it all is that a rear crossing is with respect to the relative phase difference of previous crossing that all Adjacent Intersections linear phase difference are optimized structure.
As a kind of preferred version, the step of major trunk roads comprises in the described definite area:
1). according to the magnitude of traffic flow statistics of each crossing in the zone, determine that wherein the crossing of flow maximum is crucial crossing I
B1, and set up the set of major trunk roads crossing, should join { I in the set of major trunk roads crossing in the key crossing
B1;
2). according to the highway section inlet flow rate on the four direction of crucial crossing, find out the branch road of flow maximum, the upstream Adjacent Intersections of the branch road of this flow maximum is labeled as the crucial crossing I of subordinate
BiAnd join major trunk roads crossing set { I
B1..., I
Bi, according to the crucial crossing I of the subordinate of up-to-date mark
BiRemain the entrance link flow on three directions, find out the branch road of flow maximum and the upstream Adjacent Intersections of this branch road is labeled as the crucial crossing I of new subordinate
Bi+1And join major trunk roads crossing set { I
B1..., I
Bi, I
Bi+1, traversal repeats said process until the crucial crossing of new subordinate arrives the border outlet in zone;
3). find out inlet flow rate time large branch road in crucial crossing, the upstream Adjacent Intersections of time large branch road of this flow is labeled as the crucial crossing I of subordinate
BiAnd join major trunk roads crossing set { I
B1..., I
Bi, according to the crucial crossing I of the subordinate of up-to-date mark
BiRemain the entrance link flow on three directions, find out the branch road I of flow maximum
Bi+1And the upstream Adjacent Intersections of this branch road is labeled as the crucial crossing of new subordinate and joins major trunk roads crossing set { I
B1..., I
Bi, I
Bi+1, traversal repeats said process until the crucial crossing of new subordinate arrives the border outlet in zone;
4). major trunk roads crossing set { I
B1..., I
Bi..., I
BNThe regional major trunk roads of traversal, wherein N is the crossing sum that major trunk roads comprise, with all crossing { I on the major trunk roads
B1..., I
Bi..., I
BNNumber consecutively sequentially, in step 2) in the crucial crossing of subordinate of mark by last in, first out principle numbering, namely the crucial crossing of the subordinate of last mark is numbered I
1, until the first in first out numbering is then pressed for the crucial crossing of the subordinate of mark in step 3) in crucial crossing, namely the crucial crossing of the subordinate of last mark is numbered I
NMajor trunk roads can be expressed as { I after the numbering of above-mentioned crossing
1, I
2, I
3..., I
N.
As a kind of preferred version, described link flow is to be drawn by crossing respective branch inlet flow rate mean value computation on the direction of highway section, place, namely
Wherein p is the number of crossing on the highway section, q
iInlet flow rate for i crossing respective branch on the direction of highway section, place.
As a kind of preferred version, crossing four phase configuration schemes comprise the four phase configuration schemes that four phase configuration schemes that four phase configuration schemes, northeast that four phase configuration schemes, northwest that four phase configuration schemes, the southwest of standard turn to turn to turn to and the southeast turn to, four phase configuration of standard are adopted in the crossing of keeping straight on non-major trunk roads crossing and the major trunk roads in the zone, will exist the crossing that turns to according to turning to the corresponding four phase configuration schemes that turn to that adopt respectively on the major trunk roads.The scheme that the front four phase signal machines of four phase configuration scheme feelings the pulse with the finger-tip of this standard generally adopt, its phase place comprise that exactly thing is kept straight on mutually, East and West direction is turned left, keep straight on mutually in north and south and four phase places of north-south left-hand rotation.And exist the crossing turn to according to turning to the corresponding four phase configuration schemes that turn to that adopt on the major trunk roads, as the major trunk roads crossing that exists west south and south orientation west the to turn to four phase configuration schemes of just selecting southwest to turn to.Cycle length in the phase configuration scheme, each phase sequence and each phase place green light duration etc. all pre-determine through relevant optimized algorithm.
As a kind of preferred version, the step of major trunk roads and non-major trunk roads crossing in the zone being carried out offset optimization is:
1). offset optimization is carried out in the major trunk roads crossing, according to the method for main line offset optimization, begun by first crossing of major trunk roads, calculate successively two phase differential between the adjacent major trunk roads crossing, until last crossing of major trunk roads; The core concept of major trunk roads offset optimization is, regard major trunk roads as a craspedodrome passage, method by the main line offset optimization is carried out offset optimization to the major trunk roads in zone, major trunk roads are set up the phase differential between each crossing is the traffic model of parameter on the major trunk roads, use simple Mathematics Optimization Method and can seek out easily phase differential between each crossing.
2). major trunk roads diplomacy prong is carried out offset optimization, begun by first crossing of major trunk roads, travel through the non-major trunk roads crossing adjacent with first crossing of major trunk roads, calculate the phase differential between first crossing of major trunk roads and the non-major trunk roads crossing, then identical calculating is repeated in all adjacent non-major trunk roads crossings of the next crossing of major trunk roads, until last crossing of major trunk roads;
3) if. previous step finishes still to have non-major trunk roads crossing not participate in offset optimization, then from the non-major trunk roads crossing that experiences at first offset optimization, continue all non-major trunk roads crossings that traversal is adjacent, until all non-major trunk roads crossings optimizations are complete in the zone, the serial number that optimization is calculated is all participated in by it in all non-major trunk roads crossings.
As a kind of preferred version, major trunk roads crossing offset optimization carries out offset optimization for only direction being coordinated at the major trunk roads place.Major trunk roads crossing offset optimization is not optimized the crossing with the major trunk roads road intersection.Even major trunk roads are the craspedodrome directions in certain crossing, then the offset optimization of this crossing are only considered the phase place of keeping straight on; If major trunk roads are to turn left or the right-hand rotation direction in certain crossing, then the offset optimization of this crossing is only considered to turn left or the right-hand rotation phase place.
As a kind of preferred version, will be labeled as I through the crossing of offset optimization
SIf two the adjacent crossings that relate in the subsequent calculations all are marked as I
S, the offset optimization of skipping this Adjacent Intersections calculates.
As a kind of preferred version, green light definite step start-up time of each crossing comprises:
1). adjust the phasing scheme of each crossing of major trunk roads, so that be the first phase place along the phase settings of the coordination direction of major trunk roads, set the signal lamp green light start-up time of first crossing the first phase place of major trunk roads, and the start-up time that calculates other several phase place green lights according to the phase sequence of this crossing and each phase place green light duration;
2). along the major trunk roads direction, calculate according to this start-up time of next first phase place of crossing, namely
T wherein
X, 1And t
Y, 1The first phase place green light start-up time that represents respectively neighbouring two crossings, and calculate start-up time of other several phase place green lights of this crossing start-up time according to the green light of this first phase place, repetitive operation is until last crossing of major trunk roads;
3). for non-major trunk roads crossing, according to the order of carrying out offset optimization, calculate its adjacent non-major trunk roads crossing phase place green light start-up time start-up time according to the first phase place green light of the crossing of determining signal lamp start-up time, namely
Wherein x and y represent adjacent crossing, t
X, kBe the green light start-up time of k the phase place of crossing x, t
Y, jBe j phase place green light start-up time of adjacent crossing y, the coordination phase place that j phase place of k the phase place in x crossing and y crossing is offset optimization on the same direction, the green light of the first phase place of next Adjacent Intersections y start-up time can be according to t
Y, 1=t
Y, j-Δ t
yCalculate, wherein Δ t
yBe the mistiming between Adjacent Intersections y the first phase place and the j phase place, in like manner calculate successively the green light start-up time of the first phase place of each non-major trunk roads crossing of residue.Through regional traffic signal timing dial of the present invention, so that vehicle can keep lasting current at major trunk roads, so that traffic is more unobstructed.
Advantage of the present invention is: the optimization problem of the regional traffic face control system of complexity is converted into the optimization problem of line control system, has reduced the complexity of regional traffic signal optimizing, significantly improve the efficient of regional traffic signal controlling; Emphasis of the present invention has been considered the larger major trunk roads of the magnitude of traffic flow in the zone, and the optimization of making a distinction between the important and the lesser one order is so that whole regional traffic can access more excellent control effect.
Description of drawings
Accompanying drawing 1 is a kind of flowage structure synoptic diagram of the present invention;
Accompanying drawing 2 is the regional structure synoptic diagram that exemplify in the embodiment of the invention;
Accompanying drawing 3 is synoptic diagram of phase configuration scheme among the present invention;
Accompanying drawing 4 is crossing I in the embodiment of the invention
1And I
7The signal timing dial synoptic diagram.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
Present embodiment is a kind of coordinates preferential regional traffic signal control method based on major trunk roads, and its FB(flow block) as shown in Figure 1; The zone is a urban highway traffic zone that comprises some continuous adjacent crossing, as shown in Figure 2;
This control method may further comprise the steps:
1. the major trunk roads that formed by some continuous crossings in the definite area;
2. according to the feature of crossing different phase configuration schemes is selected respectively in each crossing in the zone;
3. successively offset optimization is carried out in major trunk roads and non-major trunk roads crossing in the zone;
4. according to the phasing scheme of crossing offset optimization sequencing and each crossing configuration in the zone, determine successively the phase place green light start-up time of each crossing, finish the regional traffic signal timing dial.
The detailed process of determining major trunk roads in the step 1 is:
1). according to the magnitude of traffic flow statistics of each crossing in the zone, determine that wherein the crossing of flow maximum is crucial crossing I
B1, and set up the set of major trunk roads crossing, should join { I in the set of major trunk roads crossing in the key crossing
B1.
As shown in Figure 2, according to the traffic flow data of each crossing shown in the regional structure synoptic diagram, can determine that crucial crossing namely draws the crossing I of circle among the figure
3(I
B1), set up the set of major trunk roads crossing, with crucial crossing I
BJoin major trunk roads crossing set { I
B1}
Control method of the present invention both can be for timing controlled can be adaptive control also, and the flow of crossing is historical data on flows during timing controlled; During real-time adaptive control, the flow of crossing is the Real-Time Traffic Volume data.
2). according to the highway section inlet flow rate on the four direction of crucial crossing, find out the branch road of flow maximum, the upstream Adjacent Intersections of the branch road of this flow maximum is labeled as the crucial crossing I of subordinate
BiAnd join major trunk roads crossing set { I
B1..., I
Bi, according to the crucial crossing I of the subordinate of up-to-date mark
BiRemain the entrance link flow on three directions, find out the branch road of flow maximum and the upstream Adjacent Intersections of this branch road is labeled as the crucial crossing I of new subordinate
Bi+1And join major trunk roads crossing set { I
B1..., I
Bi, I
Bi+1, traversal repeats said process until the crucial crossing of new subordinate arrives the border outlet in zone.
According to the traffic flow data of each crossing shown in Fig. 2, can determine crucial crossing I
3(I
B1) west is to highway section inlet flow rate maximum, the crucial crossing of corresponding subordinate is I
2(I
B2), i.e. I among the figure
2, major trunk roads crossing collection expands to { I
B1, I
B2, the crucial crossing I of subordinate
2(I
B2) I
B2The entrance link flow that remains on three directions can determine that the crucial crossing of next subordinate is I
B3, i.e. I among the figure
1, major trunk roads crossing collection expands to { I
B1, I
B2, I
B3, the crucial crossing I of subordinate
B3The border outlet that arrives the zone finishes traversal.
3). find out inlet flow rate time large branch road in crucial crossing, the upstream Adjacent Intersections of time large branch road of this flow is labeled as the crucial crossing I of subordinate
BiAnd join major trunk roads crossing set { I
B1..., I
Bi, according to the crucial crossing I of the subordinate of up-to-date mark
BiRemain the entrance link flow on three directions, find out the branch road I of flow maximum
Bi+1And the upstream Adjacent Intersections of this branch road is labeled as the crucial crossing of new subordinate and joins major trunk roads crossing set { I
B1..., I
Bi, I
Bi+1, traversal repeats said process until the crucial crossing of new subordinate arrives the border outlet in zone.
The traffic flow data of each crossing as shown in Figure 2 can be determined crucial crossing I
3(I
B1) south orientation highway section inlet flow rate time is large, the crucial crossing of corresponding subordinate is I
B4, i.e. crossing I among the figure
4, major trunk roads crossing collection expands to { I
B1, I
B2, I
B3, I
B4, the crucial crossing I of subordinate
4(I
B4) entrance link flow on three directions of residue can determine that the crucial crossing of next subordinate is I
B5, i.e. I among the figure
5, by that analogy after the same method, can obtain the crucial crossing of new subordinate is I
B6, i.e. crossing I among the figure
6Considering intersection I
6(I
B6) have at least its direction not have the crossing that comprises, zone, and its north orientation highway section entrance average discharge is less than the flow of east orientation phase place, therefore, can think I
B6The crossing is the outlet in zone, and the major trunk roads traversal finishes.Major trunk roads crossing collection is { I
B1, I
B2, I
B3, I
B4, I
B5, I
B6, { the I among Fig. 2 namely
3, I
2, I
1, I
4, I
5, I
6.
4). major trunk roads crossing set { I
B1..., I
Bi..., I
BNThe regional major trunk roads of traversal, wherein N is the crossing sum that major trunk roads comprise, with all crossing { I on the major trunk roads
B1..., I
Bi.., I
BNNumber consecutively sequentially, in step 2) in the crucial crossing of subordinate of mark by last in, first out (storehouse) principle numbering, namely the crucial crossing of the subordinate of last mark is numbered I
1, until crucial crossing, then by first in first out (formation) principle numbering, namely the crucial crossing of the subordinate of last mark is numbered I for the crucial crossing of the subordinate of mark in step 3)
NMajor trunk roads can be expressed as { I after the numbering of above-mentioned crossing
1, I
2, I
3..., I
N.
According to above-mentioned steps 1), 2), 3) the major trunk roads crossing collection that obtains is { I
B1, I
B2, I
B3, I
B4, I
B5, I
B6, major trunk roads can be expressed as { I after the numbering of above-mentioned crossing
1, I
2, I
3, I
4, I
5, I
6.
Average overall travel speed between the crossing is associated with described link flow, and described link flow is to be drawn by crossing respective branch inlet flow rate mean value computation on the direction of highway section, place.The traffic flow data of each crossing as shown in Figure 2, major trunk roads crossing I
1To I
3Between link flow can by
Calculating is 257, major trunk roads crossing I
6To I
3Between link flow can by
Calculate is 225.
Feature according to the crossing in the step 2 selects respectively the process of different allocation plans to be to each crossing in the zone:
At first set crossing phase configuration scheme, as shown in Figure 3, set 5 kind of four phase configuration scheme in the present embodiment, the four phase configuration schemes that the four phase configuration schemes that four phase configuration schemes, the northeast that it four phase configuration schemes, northwest that comprises that four phase configuration schemes, the southwest of standard turn to turns to turns to and the southeast turn to.These allocation plans all comprise cycle, each phase sequence, each phase place green time, the cycle of each crossing, split all adopt classical Webster model to calculate, concrete account form is known by traffic signals control field technician, does not do being described in detail.
Then the crossing of keeping straight on non-major trunk roads crossing and the major trunk roads in the zone is adopted four phase configuration of standard, and will exist the crossing that turns to according to turning to the corresponding four phase configuration schemes that turn to that adopt respectively on the major trunk roads.
According to Fig. 2, crossing I on the major trunk roads
3And I
5Exist respectively southwest to turn to northeast and turn to, then crossing I
3And I
5The four phase configuration schemes that adopt respectively the southwestern four phase configuration schemes that turn to and northeast to turn to, all the other all crossing { I
1, I
2, I
4, I
6--I
13All adopt four phase configuration of standard.
The process of in the step 3 offset optimization being carried out in major trunk roads and non-major trunk roads crossing in the zone is:
1). offset optimization is carried out in the major trunk roads crossing, according to the method for main line offset optimization, by first crossing of major trunk roads I
1Two phase differential between the adjacent major trunk roads crossing are calculated in beginning successively
Here the value of x sequentially is that { 1,2,3,4,5}, the value of y sequentially is that { 2,3,4,5,6}, offset optimization is until last crossing I of major trunk roads
6When exist on the major trunk roads phase differential between the crossing turn to refer to the respective quadrature prong coordinate phase place and between phase differential, such as I
2And I
3Phase differential between the crossing refers to I
2Thing craspedodrome phase place and I
3The phase differential of southwest right-hand rotation phase place.The core concept of major trunk roads offset optimization is, regard major trunk roads as a craspedodrome passage, the method of utilization main line offset optimization is carried out offset optimization to the major trunk roads in zone, major trunk roads are set up the phase differential between each crossing is the traffic model of parameter on the major trunk roads, use efficient Mathematics Optimization Method and can ask for easily phase differential between each crossing.
2). offset optimization is carried out in non-major trunk roads crossing, by first crossing of major trunk roads I
1Beginning, traversal and I
1Major trunk roads I is calculated in adjacent non-major trunk roads crossing
1With non-major trunk roads crossing I
7Between phase differential; Then to the next crossing I of major trunk roads
2Identical calculating is repeated in the non-major trunk roads of adjacent all crossing, also is the non-major trunk roads crossing I among present embodiment Fig. 2
8And I
9Until last crossing I of major trunk roads
6, obtain non-crossing I
7--I
12The optimization of phase differential; The calculating and the major trunk roads crossing offset optimization that non-major trunk roads crossing are carried out offset optimization are similar;
3). after the experience above-mentioned steps non-major trunk roads crossing I is arranged still
13Do not participate in offset optimization.Then from experiencing at first the adjacent non-major trunk roads crossing I of offset optimization
10Beginning is carried out offset optimization to non-major trunk roads crossing and is calculated, and obtains I
13Optimum angle poor
All non-major trunk roads crossings are all participated in the crossing that obtains as shown in Figure 2 after the serial number of optimization calculating by it and are numbered.Because the offset optimization of non-major trunk roads crossing just carries out between two Adjacent Intersections, do not exist to turn to coordination problem, therefore, required phase differential is to keep straight between two crossings to coordinate the phase differential of phase place, such as I
1And I
7Phase differential between the crossing is exactly I
1North and south craspedodrome phase place and I
7North and south craspedodrome phase place between phase differential.
Green light definite process start-up time of each crossing comprises in the step 4:
1). adjust the phasing scheme of each crossing of major trunk roads, so that be the first phase place along the phase settings of the coordination direction of major trunk roads, set the signal lamp green light start-up time of first crossing the first phase place of major trunk roads, and the start-up time that calculates other several phase place green lights according to the phase sequence of this crossing and each phase place green light duration;
According to such as Fig. 2, at first set major trunk roads crossing I
1T start-up time of signal lamp thing craspedodrome behavior
1,1(can be set as zero constantly) is then according to crossing I
1The green light that phase configuration order and each phase place green time just can calculate other three phase places such as thing left-hand rotation, north and south craspedodrome, north and south left-hand rotation is respectively t start-up time
1,2, t
1,3And t
Isosorbide-5-Nitrae
2). along the major trunk roads direction, calculate according to this start-up time of next first phase place of crossing, namely
T wherein
X, 1And t
Y, 1The first phase place green light start-up time that represents respectively neighbouring two crossings, and calculate start-up time of other several phase place green lights of this crossing start-up time according to the green light of this first phase place, repetitive operation is until last crossing of major trunk roads;
According to Fig. 2, calculate next crossing I
2The start-up time of first phase place
Adjust the phasing scheme of major trunk roads crossing, so that be the first phase place along the phase settings of the coordination direction of major trunk roads, according to this t
2,1Calculate crossing I
2The start-up time of other several phase place green lights, repeat above operation until last crossing I of major trunk roads
6, the regional signal control of this one-phase finishes.
3). for non-major trunk roads crossing, according to the order of carrying out offset optimization, calculate its adjacent non-major trunk roads crossing phase place green light start-up time start-up time according to the first phase place green light of the crossing of determining signal lamp start-up time, namely
Wherein x and y represent adjacent crossing, t
X, kBe the green light start-up time of k the phase place of crossing x, t
Y, jBe j phase place green light start-up time of adjacent crossing y, the coordination phase place that j phase place of k the phase place in x crossing and y crossing is offset optimization on the same direction, the green light of the first phase place of next Adjacent Intersections y start-up time can be according to t
Y, 1=t
Y, j-Δ t
yCalculate, wherein Δ t
yBe the mistiming between Adjacent Intersections y the first phase place and the j phase place, in like manner calculate successively the green light start-up time of the first phase place of each non-major trunk roads crossing of residue.
According to Fig. 2, by major trunk roads crossing I
1Begin to determine Adjacent Intersections I
7Signal lamp during start-up time, as shown in Figure 4, calculate first crossing I
1The Startup time t of north and south craspedodrome phase place
1,3, crossing I then
7The Startup time of north and south craspedodrome phase place is
Crossing I
7Accepted standard four phase configuration schemes, its first phase configuration is thing craspedodrome phase place, phase place start-up time is t
7,1=t
7,3+ Δ t
7, wherein, Δ t
7I
7The mistiming of crossing thing craspedodrome phase place and north and south craspedodrome phase place, i.e. I
7The green time sum that the green time that the crossing thing is kept straight on and thing turn left.According to t
7,1Can calculate crossing I
7T start-up time of other two phase place green lights
7,2And t
7,4Then the order by offset optimization enters crossing I
8, making uses the same method can finish I successively
8To I
13The timing of crossing, the regional signal control of this one-phase finishes.
Specific embodiment described herein only is to the explanation for example of the present invention's spirit.Can not limit interest field of the present invention with this.In fact, for more complicated field condition, as to have T-shape crossing, part track be the actual conditions such as one-way road, and method of the present invention can be applied equally, as long as consider the simple method that changes flow rate calculation.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (9)
1. coordinate preferential regional traffic signal control method based on major trunk roads for one kind, described zone is a urban highway traffic zone that comprises some continuous adjacent crossing, and it is characterized in that: the method may further comprise the steps:
A. be crucial crossing according to a certain crossing in the traffic flow data definite area, and take crucial crossing as benchmark, the major trunk roads that formed by some continuous crossings in the definite area;
B. preset some crossings four phase configuration schemes, according to the feature of crossing different allocation plans is selected respectively in each crossing in the zone;
C. successively offset optimization is carried out in major trunk roads and non-major trunk roads crossing in the zone, calculate successively the phase differential between the adjacent non-major trunk roads crossing in phase differential between the adjacent major trunk roads crossing and the zone according to the method for main line offset optimization;
D. according to the phasing scheme of crossing offset optimization sequencing and each crossing configuration in the zone, determine successively the phase place green light start-up time of each crossing, finish the regional traffic signal timing dial.
2. according to claim 1 a kind of based on the preferential regional traffic signal control method of major trunk roads coordination, it is characterized in that the phase differential between the interior adjacent non-major trunk roads crossing of phase differential and zone between the adjacent major trunk roads crossing passes through
Calculate, wherein
Be the relative phase difference between two Adjacent Intersections x and the crossing y,
Be the time average from crossing x to Adjacent Intersections y stroke, S
Y, xBe the distance between corresponding two Adjacent Intersections,
For vehicle from crossing x to the average overall travel speed the Adjacent Intersections y.
3. according to claim 1 a kind of based on the preferential regional traffic signal control method of major trunk roads coordination, it is characterized in that the step of major trunk roads in the described definite area comprises:
1). according to the magnitude of traffic flow statistics of each crossing in the zone, determine that wherein the crossing of flow maximum is crucial crossing I
B1, and set up the set of major trunk roads crossing, should join { I in the set of major trunk roads crossing in the key crossing
B1;
2). according to the highway section inlet flow rate on the four direction of crucial crossing, find out the branch road of flow maximum, the upstream Adjacent Intersections of the branch road of this flow maximum is labeled as the crucial crossing I of subordinate
BiAnd join major trunk roads crossing set { I
B1..., I
Bi, according to the crucial crossing I of the subordinate of up-to-date mark
BiRemain the entrance link flow on three directions, find out the branch road of flow maximum and the upstream Adjacent Intersections of this branch road is labeled as the crucial crossing I of new subordinate
Bi+1And join major trunk roads crossing set { I
B1..., I
Bi, I
Bi+1, traversal repeats said process until the crucial crossing of new subordinate arrives the border outlet in zone;
3). find out inlet flow rate time large branch road in crucial crossing, the upstream Adjacent Intersections of time large branch road of this flow is labeled as the crucial crossing I of subordinate
BiAnd join major trunk roads crossing set { I
B1..., I
Bi, according to the crucial crossing I of the subordinate of up-to-date mark
BiRemain the entrance link flow on three directions, find out the branch road I of flow maximum
Bi+1And the upstream Adjacent Intersections of this branch road is labeled as the crucial crossing of new subordinate and joins major trunk roads crossing set { I
B1..., I
Bi, I
Bi+1, traversal repeats said process until the crucial crossing of new subordinate arrives the border outlet in zone;
4). major trunk roads crossing set { I
B1..., I
Bi..., I
BNThe regional major trunk roads of traversal, wherein N is the crossing sum that major trunk roads comprise, with all crossing { I on the major trunk roads
B1..., I
Bi..., I
BNNumber consecutively sequentially, in step 2) in the crucial crossing of subordinate of mark by last in, first out principle numbering, namely the crucial crossing of the subordinate of last mark is numbered I
1, until the first in first out numbering is then pressed for the crucial crossing of the subordinate of mark in step 3) in crucial crossing, namely the crucial crossing of the subordinate of last mark is numbered I
NMajor trunk roads can be expressed as { I after the numbering of above-mentioned crossing
1, I
2, I
3..., I
N.
4. according to claim 2 a kind of based on the preferential regional traffic signal control method of major trunk roads coordination, it is characterized in that described link flow is to be drawn by crossing respective branch inlet flow rate mean value computation on the direction of highway section, place, namely
Wherein p is the number of crossing on the highway section, q
iInlet flow rate for i crossing respective branch on the direction of highway section, place.
5. each is described a kind of based on the preferential regional traffic signal control method of major trunk roads coordination according to claim 1-4, it is characterized in that crossing four phase configuration schemes comprise four phase configuration schemes of standard, the four phase configuration schemes that southwest turns to, the four phase configuration schemes that the northwest turns to, the four phase configuration schemes that the four phase configuration schemes that northeast turns to and the southeast turn to, four phase configuration of standard are adopted in the crossing of keeping straight on non-major trunk roads crossing and the major trunk roads in the zone, will exist the crossing that turns to according to turning to the corresponding four phase configuration schemes that turn to that adopt respectively on the major trunk roads.
6. each is described a kind of based on the preferential regional traffic signal control method of major trunk roads coordination according to claim 1-4, it is characterized in that the step of major trunk roads and non-major trunk roads crossing in the zone being carried out offset optimization is:
1). offset optimization is carried out in the major trunk roads crossing, according to the method for main line offset optimization, begun by first crossing of major trunk roads, calculate successively two phase differential between the adjacent major trunk roads crossing, until last crossing of major trunk roads;
2). major trunk roads diplomacy prong is carried out offset optimization, begun by first crossing of major trunk roads, travel through the non-major trunk roads crossing adjacent with first crossing of major trunk roads, calculate the phase differential between first crossing of major trunk roads and the non-major trunk roads crossing, then identical calculating is repeated in all adjacent non-major trunk roads crossings of the next crossing of major trunk roads, until last crossing of major trunk roads;
3) if. previous step finishes still to have non-major trunk roads crossing not participate in offset optimization, then from the non-major trunk roads crossing that experiences at first offset optimization, continue all non-major trunk roads crossings that traversal is adjacent, until all non-major trunk roads crossings optimizations are complete in the zone, the serial number that optimization is calculated is all participated in by it in all non-major trunk roads crossings.
7. according to claim 6 a kind of based on the preferential regional traffic signal control method of major trunk roads coordination, it is characterized in that major trunk roads crossing offset optimization carries out offset optimization for only direction being coordinated at the major trunk roads place.
8. according to claim 6 a kind of based on the preferential regional traffic signal control method of major trunk roads coordination, it is characterized in that the crossing through offset optimization is labeled as I
sIf two the adjacent crossings that relate in the subsequent calculations all are marked as I
s, the offset optimization of skipping this Adjacent Intersections calculates.
9. each is described a kind of based on the preferential regional traffic signal control method of major trunk roads coordination according to claim 1-4, it is characterized in that green light definite step start-up time of each crossing comprises:
1). adjust the phasing scheme of each crossing of major trunk roads, so that be the first phase place along the phase settings of the coordination direction of major trunk roads, set the signal lamp green light start-up time of first crossing the first phase place of major trunk roads, and the start-up time that calculates other several phase place green lights according to the phase sequence of this crossing and each phase place green light duration;
2). along the major trunk roads direction, calculate according to this start-up time of next first phase place of crossing, namely
T wherein
X, 1And t
Y, 1The first phase place green light start-up time that represents respectively neighbouring two crossings, and calculate start-up time of other several phase place green lights of this crossing start-up time according to the green light of this first phase place, repetitive operation is until last crossing of major trunk roads;
3). for non-major trunk roads crossing, according to the order of carrying out offset optimization, calculate its adjacent non-major trunk roads crossing phase place green light start-up time start-up time according to the first phase place green light of the crossing of determining signal lamp start-up time, namely
Wherein x and y represent adjacent crossing, t
X, kBe the green light start-up time of k the phase place of crossing x, t
Y, jBe j phase place green light start-up time of adjacent crossing y, the coordination phase place that j phase place of k the phase place in x crossing and y crossing is offset optimization on the same direction, the green light of the first phase place of next Adjacent Intersections y start-up time can be according to t
Y, 1=t
Y, j-Δ t
yCalculate, wherein Δ t
yBe the mistiming between Adjacent Intersections y the first phase place and the j phase place, in like manner calculate successively the green light start-up time of the first phase place of each non-major trunk roads crossing of residue.
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