CN102982688B - 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 and a kind ofly coordinate preferential regional traffic signal control method based on major trunk roads.
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 city exactly., because city space holds quantitative limitation, this method is more and more 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, intelligent transportation control technology is more and more subject to city manager's attention, and has obtained a lot of useful achievements in many cities.And for intelligent transportation control technology, the traffic signals control of intersection is a wherein important ring.
According to the difference of 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 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 (single intersection signal controlling does not need to optimize phase differential), the traffic lights of each crossing is configured to the traffic signals control that just can realize intersection by these three parameters.At traffic signals control field, the comparative maturity of every technology of single intersection signal control method and arterial traffic signal control method, regional traffic signal controlling also has suitable development space.
At present more famous regional traffic signal control method has TRANSYT(TrafficNetwork Study Tool: transportation network learning tool system), SCOOT(Split, Cycleand 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 the traffic self-adaptation control method based on TRANSYT model, and SCATS is a kind of Real-time adaptive traffic control system of not setting up traffic model.
Said method is all to be proposed by the research institution of developed countries, and the road traffic facility that is applied to external maturation has good control effect.But, because China city is also in the middle of development, the road traffic facility in city and traffic law are yet mostly in developing perfect process, all difference very large with external existence of condition of road surface or the mixed traffic flow of actual complex, can not meet 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 is mainly the problem that in solution prior art, area traffic control method is not suitable with China's urban highway traffic equipment, a kind of China urban highway traffic equipment of can adapting to is provided, solve the reasonably optimizing problem of the unbalanced traffic flow existing in city, improve simultaneously the optimization of regional traffic signal timing dial efficiency coordinate 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 ofly coordinate preferential regional traffic signal control method based on major trunk roads, described region is a urban highway traffic region that comprises some continuous adjacent crossing, and the method comprises the following steps:
A. determine that according to traffic flow data in region, a certain crossing is crucial crossing, and taking crucial crossing as benchmark, determine the major trunk roads that formed by some continuous crossings in region;
B. preset some crossings four phase configuration schemes, according to the feature of crossing, different allocation plans is selected respectively in Nei Ge crossing, region;
C. successively major trunk roads in region and non-major trunk roads crossing are carried out to offset optimization, calculate successively the phase differential between adjacent non-major trunk roads crossing in neighbour's the phase differential of adjacent major trunk roads crossing and region according to the method for main line offset optimization;
D. according to the phasing scheme of offset optimization sequencing in crossing in region and the configuration of each crossing, determine successively the phase place green light start-up time of each crossing, complete regional traffic signal timing dial.
The present invention is converted into the optimization problem of complicated regional traffic face control system the optimization problem of line control system, has reduced the complexity of regional traffic signal optimizing process, significantly improves the efficiency 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 region, and the optimization of making a distinction between the important and the lesser one order makes whole regional traffic can obtain more superior control effect.
As a kind of preferred version, the phase differential in the phase differential between adjacent major trunk roads crossing and region between adjacent non-major trunk roads crossing passes through
calculate, wherein
be the relative phase difference between two Adjacent Intersections x and crossing y,
for the time average from crossing x to Adjacent Intersections y stroke, S
y,xfor the distance between corresponding two Adjacent Intersections,
for vehicle is from crossing x to the average overall travel speed 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 is all the relative phase difference of a rear crossing with respect to previous crossing that all Adjacent Intersections linear phase difference are optimized structure.
As a kind of preferred version, in described definite region, the step of major trunk roads comprises:
1). according to the magnitude of traffic flow statistics of each crossing in region, determine that wherein the crossing of flow maximum is crucial crossing I
b1, and set up the set of major trunk roads crossing, this key crossing is joined to { I in the set of major trunk roads crossing
b1;
2). according to the 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 to 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 in three directions, find out the branch road of flow maximum and the upstream Adjacent Intersections of this branch road is labeled as to 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 border outlet in new arrival region, the crucial crossing of subordinate;
3). on crucial crossing, find out inlet flow rate time large branch road, the upstream Adjacent Intersections of the inferior large branch road of this flow is labeled as to 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 in three directions, find out the branch road I of flow maximum
bi+1and the upstream Adjacent Intersections of this branch road is labeled as to 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 border outlet in new arrival region, the crucial crossing of subordinate;
4). major trunk roads crossing set { I
b1..., I
bi..., I
bNtraversal region major trunk roads, wherein N is the crossing sum that major trunk roads comprise, by all crossing { I on 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, the crucial crossing of the subordinate of last mark is numbered I
1, until first in first out numbering is pressed for the crucial crossing of subordinate of mark in step 3) in crucial crossing, the crucial crossing of the subordinate of last mark is numbered I
nafter the numbering of above-mentioned crossing, major trunk roads can be expressed as { I
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 in the direction of section, place,
wherein p is the number of crossing on section, q
ifor the inlet flow rate of i crossing respective branch in the direction of 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, the crossing of keeping straight on non-major trunk roads crossing and major trunk roads in region is adopted to four phase configuration of standard, will on major trunk roads, exist the crossing turning to according to turning to the corresponding four phase configuration schemes that turn to that adopt respectively.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 comprises that 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 exactly.And exist the crossing that turns to according to turning to the corresponding four phase configuration schemes that turn to that adopt on 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 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 in region and non-major trunk roads crossing being carried out to offset optimization is:
1). offset optimization is carried out in major trunk roads crossing, according to the method for main line offset optimization, started by first crossing of major trunk roads, calculate successively two phase differential between 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 main line offset optimization is carried out offset optimization to the major trunk roads in region, major trunk roads are set up taking the phase differential between each crossing on major trunk roads as the traffic model of parameter, applied simple Mathematics Optimization Method and can seek out easily the phase differential between each crossing.
2). major trunk roads diplomacy prong is carried out to offset optimization, started 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 non-major trunk roads crossing, then identical calculating is repeated in adjacent all non-major trunk roads crossing, 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, from experiencing at first the non-major trunk roads crossing of offset optimization, continue all non-major trunk roads crossing that traversal is adjacent, until the optimization of all non-major trunk roads crossing is complete in region, serial number that optimization is calculated is all participated in by it in all non-major trunk roads crossing.
As a kind of preferred version, major trunk roads crossing offset optimization carries out offset optimization for only direction being coordinated in major trunk roads place.Major trunk roads crossing offset optimization is not to being optimized with the crossing of major trunk roads road intersection.Even major trunk roads are craspedodrome directions in certain crossing, the offset optimization of this crossing are only considered to the phase place of keeping straight on; If major trunk roads are to turn left or right-hand rotation direction in certain crossing, the offset optimization of this crossing is only considered to turn left or right-hand rotation phase place.
As a kind of preferred version, the crossing through offset optimization is labeled as to I
sif two the adjacent crossings that relate in subsequent calculations are all marked as I
s, skip the offset optimization of this Adjacent Intersections calculated.
As a kind of preferred version, green light definite step start-up time of each crossing comprises:
1). adjust the phasing scheme of the each crossing of major trunk roads, making along the phase settings of the coordination direction of major trunk roads is the first phase place, set the signal lamp green light start-up time of major trunk roads first crossing the first phase places, and calculate the start-up time of other several phase place green lights according to the phase sequence of this crossing and each phase place green light duration;
2). along major trunk roads direction, calculate according to this start-up time of next first phase place of crossing,
wherein t
x, 1and t
y, 1represent respectively first phase place green light start-up time of neighbouring two crossings, and calculate the start-up time of other several phase place green lights of this crossing according to the green light of this first phase place start-up time, 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 crossing of determining signal lamp start-up time,
wherein x and y represent adjacent crossing, t
x,kfor the green light start-up time of k the phase place of crossing x, t
y, jfor j phase place green light start-up time of adjacent crossing y, the coordination phase place that j phase place of k of x crossing phase place and y crossing is offset optimization in 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
yfor the mistiming between Adjacent Intersections y the first phase place and 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, make vehicle can on major trunk roads, keep continuing to pass through, make traffic more unobstructed.
Advantage of the present invention is: the optimization problem of complicated regional traffic face control system is converted into the optimization problem of line control system, has reduced the complexity of regional traffic signal optimizing, significantly improve the efficiency 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 region, and the optimization of making a distinction between the important and the lesser one order makes whole regional traffic can obtain more excellent control effect.
Brief description of the drawings
Accompanying drawing 1 is a kind of flowage structure schematic diagram of the present invention;
Accompanying drawing 2 is the regional structure schematic diagram that exemplify in the embodiment of the present invention;
Accompanying drawing 3 is schematic diagram of phase configuration scheme in the present invention;
Accompanying drawing 4 is crossing I in the embodiment of the present invention
1and I
7signal timing dial schematic diagram.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
The 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; Region is a urban highway traffic region that comprises some continuous adjacent crossing, as shown in Figure 2;
This control method comprises the following steps:
1. determine the major trunk roads that formed by some continuous crossings in region;
2. according to the feature of crossing, different phase configuration schemes is selected respectively in Nei Ge crossing, region;
3. successively major trunk roads in region and non-major trunk roads crossing are carried out to offset optimization;
4. according to the phasing scheme of offset optimization sequencing in crossing in region and the configuration of each crossing, determine successively the phase place green light start-up time of each crossing, complete regional traffic signal timing dial.
The detailed process of determining major trunk roads in step 1 is:
1). according to the magnitude of traffic flow statistics of each crossing in region, determine that wherein the crossing of flow maximum is crucial crossing I
b1, and set up the set of major trunk roads crossing, this key crossing is joined to { I in the set of major trunk roads crossing
b1.
As shown in Figure 2, according to the traffic flow data of each crossing shown in regional structure schematic diagram, can determine that crucial crossing draw the crossing I of circle in figure
3(I
b1), set up the set of major trunk roads crossing, by crucial crossing I
bjoin major trunk roads crossing set { I
b1}
Control method of the present invention can be both also adaptive control for timing controlled, and when timing controlled, the flow of crossing is historical data on flows; When real-time adaptive control, the flow of crossing is Real-Time Traffic Volume data.
2). according to the 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 to 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 in three directions, find out the branch road of flow maximum and the upstream Adjacent Intersections of this branch road is labeled as to 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 border outlet in new arrival region, the crucial crossing of subordinate.
According to the traffic flow data of each crossing shown in Fig. 2, can determine crucial crossing I
3(I
b1) west is to section inlet flow rate maximum, the crucial crossing of corresponding subordinate is I
2(I
b2), i.e. I in 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 remaining in three directions can determine that the crucial crossing of next subordinate is I
b3, i.e. I in 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 region finishes traversal.
3). on crucial crossing, find out inlet flow rate time large branch road, the upstream Adjacent Intersections of the inferior large branch road of this flow is labeled as to 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 in three directions, find out the branch road I of flow maximum
bi+1and the upstream Adjacent Intersections of this branch road is labeled as to 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 border outlet in new arrival region, the crucial crossing of subordinate.
The traffic flow data of each crossing as shown in Figure 2, can determine crucial crossing I
3(I
b1) south orientation section inlet flow rate time is large, the crucial crossing of corresponding subordinate is I
b4, i.e. crossing I in 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) the entrance link flow of residue in three directions can determine that the crucial crossing of next subordinate is I
b5, i.e. I in figure
5, by that analogy after the same method, can obtain the crucial crossing of new subordinate is I
b6, i.e. crossing I in figure
6.Considering intersection I
6(I
b6) crossing that has at least its direction not have region to comprise, and its north orientation section entrance average discharge is less than the flow of east orientation phase place, therefore, can think I
b6crossing is the outlet in region, and major trunk roads traversal finishes.Major trunk roads crossing collection is { I
b1, I
b2, I
b3, I
b4, I
b5, I
b6, the namely { I in Fig. 2
3, I
2, I
1, I
4, I
5, I
6.
4). major trunk roads crossing set { I
b1..., I
bi..., I
bNtraversal region major trunk roads, wherein N is the crossing sum that major trunk roads comprise, by all crossing { I on 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, the crucial crossing of the subordinate of last mark is numbered I
1, until number by first in first out (queue) principle for the crucial crossing of subordinate of mark in step 3) crucial crossing, the crucial crossing of the subordinate of last mark is numbered I
nafter the numbering of above-mentioned crossing, major trunk roads can be expressed as { I
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, after the numbering of above-mentioned crossing, major trunk roads can be expressed as { I
1, I
2, I
3, I
4, I
5, I
6.
Average overall travel speed between 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 in the direction of 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 be by
calculating is 257, major trunk roads crossing I
6to I
3between link flow can be by
calculate is 225.
In step 2, select respectively the process of different allocation plans to be according to the feature of crossing to Nei Ge crossing, region:
First set crossing phase configuration scheme, as shown in Figure 3, in the present embodiment, set 5 kind of four phase configuration scheme, 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 describe in detail.
Then the crossing of keeping straight on non-major trunk roads crossing and major trunk roads in region is adopted to four phase configuration of standard, and will on major trunk roads, exist the crossing turning to according to turning to the corresponding four phase configuration schemes that turn to that adopt respectively.
According to Fig. 2, crossing I on major trunk roads
3and I
5exist respectively southwest to turn to northeast and turn to, 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 step 3, offset optimization being carried out in major trunk roads in region and non-major trunk roads crossing is:
1). offset optimization is carried out in major trunk roads crossing, according to the method for main line offset optimization, by first crossing of major trunk roads I
1start, calculate successively two phase differential between adjacent major trunk roads crossing
here the value of x order is that { 1,2,3,4,5}, the value order of y is that { 2,3,4,5,6}, offset optimization is until last crossing I of major trunk roads
6.When on major trunk roads, exist phase differential between the crossing that turns to refer to respective quadrature prong coordinate phase place and between phase differential, as I
2and I
3phase differential between 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, use the method for main line offset optimization to carry out offset optimization to the major trunk roads in region, major trunk roads are set up taking the phase differential between each crossing on major trunk roads as the traffic model of parameter, applied efficient Mathematics Optimization Method and can ask for easily the 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
1start traversal and I
1adjacent non-major trunk roads crossing, calculates major trunk roads I
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 adjacent all non-major trunk roads crossing, is also the non-major trunk roads crossing I in the present embodiment Fig. 2
8and I
9; Until 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 to offset optimization are similar;
3). after experience above-mentioned steps, still there is non-major trunk roads crossing I
13do not participate in offset optimization.From experiencing at first the adjacent non-major trunk roads crossing I of offset optimization
10start, offset optimization calculating is carried out in non-major trunk roads crossing, obtain I
13optimum angle poor
all non-major trunk roads crossing is all participated in by it crossing obtaining as shown in Figure 2 after serial number of optimization calculating and is numbered.Because the offset optimization of non-major trunk roads crossing just carries out between two Adjacent Intersections, do not exist and turn to coordination problem, therefore, required phase differential is to keep straight on and coordinate the phase differential of phase place between two crossings, as I
1and I
7phase differential between crossing is exactly I
1north and south craspedodrome phase place and I
7north and south craspedodrome phase place between phase differential.
In step 4, green light definite process start-up time of each crossing comprises:
1). adjust the phasing scheme of the each crossing of major trunk roads, making along the phase settings of the coordination direction of major trunk roads is the first phase place, set the signal lamp green light start-up time of major trunk roads first crossing the first phase places, and calculate the start-up time of other several phase place green lights according to the phase sequence of this crossing and each phase place green light duration;
According to as Fig. 2, first set major trunk roads crossing I
1t start-up time of signal lamp thing craspedodrome behavior
1,1(can be set as for zero moment), 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 major trunk roads direction, calculate according to this start-up time of next first phase place of crossing,
wherein t
x, 1and t
y, 1represent respectively first phase place green light start-up time of neighbouring two crossings, and calculate the start-up time of other several phase place green lights of this crossing according to the green light of this first phase place start-up time, 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, making along the phase settings of the coordination direction of major trunk roads is the first phase place, 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 crossing of determining signal lamp start-up time,
wherein x and y represent adjacent crossing, t
x,kfor the green light start-up time of k the phase place of crossing x, t
y, jfor j phase place green light start-up time of adjacent crossing y, the coordination phase place that j phase place of k of x crossing phase place and y crossing is offset optimization in 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
yfor the mistiming between Adjacent Intersections y the first phase place and 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
1start to determine Adjacent Intersections I
7signal lamp start-up time time, as shown in Figure 4, first calculate crossing I
1the Startup time t of north and south craspedodrome phase place
1,3, crossing I
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 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
7,4.Then enter crossing I by the order of offset optimization
8, making to use the same method to complete I successively
8to I
13the timing of crossing, the regional signal control of this one-phase finishes.
Specific embodiment described herein is only 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 the actual conditions such as to have T-shape crossing, part track be one-way road, 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 amendments or supplement 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 (8)
1. coordinate a preferential regional traffic signal control method based on major trunk roads, described region is a urban highway traffic region that comprises some continuous adjacent crossing, it is characterized in that: the method comprises the following steps:
A. determine that according to traffic flow data in region, a certain crossing is crucial crossing, and taking crucial crossing as benchmark, determine the major trunk roads that formed by some continuous crossings in region;
B. preset some crossings four phase configuration schemes, according to the feature of crossing, different allocation plans is selected respectively in Nei Ge crossing, region;
C. successively major trunk roads in region and non-major trunk roads crossing are carried out to offset optimization, calculate successively the phase differential between adjacent non-major trunk roads crossing in phase differential between adjacent major trunk roads crossing and region according to the method for main line offset optimization, the phase differential in the phase differential between adjacent major trunk roads crossing and region between adjacent non-major trunk roads crossing passes through
calculate, wherein
be the relative phase difference between two Adjacent Intersections x and crossing y,
for the time average from crossing x to Adjacent Intersections y stroke, S
y, xfor the distance between corresponding two Adjacent Intersections,
for vehicle is from crossing x to the average overall travel speed Adjacent Intersections y;
D. according to the phasing scheme of offset optimization sequencing in crossing in region and the configuration of each crossing, determine successively the phase place green light start-up time of each crossing, complete regional traffic signal timing dial.
2. according to claim 1ly a kind ofly coordinate preferential regional traffic signal control method based on major trunk roads, it is characterized in that the step of major trunk roads in described definite region comprises:
1). according to the magnitude of traffic flow statistics of each crossing in region, determine that wherein the crossing of flow maximum is crucial crossing I
b1, and set up the set of major trunk roads crossing, this key crossing is joined to { I in the set of major trunk roads crossing
b1;
2). according to the 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 to 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 in three directions, find out the branch road of flow maximum and the upstream Adjacent Intersections of this branch road is labeled as to 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 border outlet in new arrival region, the crucial crossing of subordinate;
3). on crucial crossing, find out inlet flow rate time large branch road, the upstream Adjacent Intersections of the inferior large branch road of this flow is labeled as to 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 in three directions, find out the branch road I of flow maximum
bi+1and the upstream Adjacent Intersections of this branch road is labeled as to 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 border outlet in new arrival region, the crucial crossing of subordinate;
4). major trunk roads crossing set { I
b1..., I
bi..., I
bNtraversal region major trunk roads, wherein N is the crossing sum that major trunk roads comprise, by all crossing { I on 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, the crucial crossing of the subordinate of last mark is numbered I
1, until crucial crossing, in step 3) in the crucial crossing of subordinate of mark press first in first out numbering, the subordinate of last mark key crossing is numbered I
nafter the numbering of above-mentioned crossing, major trunk roads can be expressed as { I
1, I
2, I
3..., I
n.
3. according to claim 2ly a kind ofly coordinate preferential regional traffic signal control method based on major trunk roads, it is characterized in that described link flow is to be drawn by crossing respective branch inlet flow rate mean value computation in the direction of section, place,
wherein p is the number of crossing on section, q
ifor the inlet flow rate of i crossing respective branch in the direction of section, place.
4. coordinate preferential regional traffic signal control method according to a kind of described in claim 1-3 any one based on major trunk roads, 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 northwest turns to, the four phase configuration schemes that the four phase configuration schemes that northeast turns to and the southeast turn to, the crossing of keeping straight on non-major trunk roads crossing and major trunk roads in region is adopted to four phase configuration of standard, to on major trunk roads, exist the crossing turning to according to turning to the corresponding four phase configuration schemes that turn to that adopt respectively.
5. coordinate preferential regional traffic signal control method according to a kind of described in claim 1-3 any one based on major trunk roads, it is characterized in that the step of major trunk roads in region and non-major trunk roads crossing being carried out to offset optimization is:
1). offset optimization is carried out in major trunk roads crossing, according to the method for main line offset optimization, started by first crossing of major trunk roads, calculate successively two phase differential between adjacent major trunk roads crossing, until last crossing of major trunk roads;
2). major trunk roads diplomacy prong is carried out to offset optimization, started 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 non-major trunk roads crossing, then identical calculating is repeated in adjacent all non-major trunk roads crossing, 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, from experiencing at first the non-major trunk roads crossing of offset optimization, continue all non-major trunk roads crossing that traversal is adjacent, until the optimization of all non-major trunk roads crossing is complete in region, serial number that optimization is calculated is all participated in by it in all non-major trunk roads crossing.
6. according to claim 5ly a kind ofly coordinate preferential regional traffic signal control method based on major trunk roads, it is characterized in that major trunk roads crossing offset optimization carries out offset optimization for only direction being coordinated in major trunk roads place.
7. according to claim 5ly a kind ofly coordinate preferential regional traffic signal control method based on major trunk roads, it is characterized in that the crossing through offset optimization to be labeled as I
sif two the adjacent crossings that relate in subsequent calculations are all marked as I
s, skip the offset optimization of this Adjacent Intersections calculated.
8. coordinate preferential regional traffic signal control method according to a kind of described in claim 1-3 any one based on major trunk roads, it is characterized in that green light definite step start-up time of each crossing comprises:
1). adjust the phasing scheme of the each crossing of major trunk roads, making along the phase settings of the coordination direction of major trunk roads is the first phase place, set the signal lamp green light start-up time of major trunk roads first crossing the first phase places, and calculate the start-up time of other several phase place green lights according to the phase sequence of this crossing and each phase place green light duration;
2). along major trunk roads direction, calculate according to this start-up time of next first phase place of crossing,
wherein t
x, 1and t
y, 1represent respectively first phase place green light start-up time of neighbouring two crossings, and calculate the start-up time of other several phase place green lights of this crossing according to the green light of this first phase place start-up time, 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 crossing of determining signal lamp start-up time,
wherein x and y represent adjacent crossing, t
x, kfor the green light start-up time of k the phase place of crossing x, t
yjfor j phase place green light start-up time of adjacent crossing y, the coordination phase place that j phase place of k of x crossing phase place and y crossing is offset optimization in 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
yfor the mistiming between Adjacent Intersections y the first phase place and 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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| CN111047883B (en) * | 2019-12-23 | 2021-01-01 | 西南科技大学 | Traffic signal control method for key intersection and adjacent intersection |
| CN112419758B (en) * | 2020-11-05 | 2022-12-09 | 青岛海信网络科技股份有限公司 | Network green wave coordination method and terminal |
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