CN108898855A - Crossing signals phasing scheme long green light time configuration method - Google Patents
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Abstract
The present invention provides a kind of crossing signals phasing scheme long green light time configuration method, traffic flow data and saturation headway based on lane, conformity calculation obtain each current direction in crossing it is minimum green when demand, and based on signal phase Scheme Solving go out phase it is minimum green when demand optimal solution；This method, for each phase long green light time allocation problem of signaling plan, demand calculates when the traffic flow data and saturation headway information minimum green to each lane period of entrance driveway in unit time section that are obtained based on crossing detector device, and according to canalization and lamp group information determine each current direction it is minimum green when demand, it is solved according further to most short long green light time of the signal phase scheme corresponding in the period to each signal phase stage, to configure fixed signal phase scheme, and the configuration for induction type signal phase scheme provides support foundation, effectively improve the allocative efficiency of signaling plan, alleviate crossing traffic congestion.
Description
Technical field
The present invention relates to a kind of crossing signals phasing scheme long green light time configuration methods.
Background technique
Traffic signalization is achieved the purpose that traffic flow progress temporal separation and control, generally by traffic lights
It needs to be designed signal phase and timing.Stream of traditional signal phase scheme based on each entrance driveway exterior traffic in intersection
Timing signal phasing scheme is determined to flow, but with the fast development of urban transportation, the volume of traffic constantly changes in one day, it is fixed
When timing scheme cause stop frequency and delay to be continuously increased, then at times traffic signals scheme and traffic responsive control
Using and give birth to.
The configuration of Signal phase scheme at this stage is based on traffic flow data configuration 5-6 set timing or induction type signal side
Case is simultaneously scheduled according to demand, and long green light time is by experienced person according to magnitude of traffic flow ratio in signaling plan therein
Example and vehicle are delayed data configuration.And with the development of urban highway traffic, intersection road conditions are complicated, and tradition is according to the magnitude of traffic flow
It determines that the way flexibility of more set signal time distributing conceptions is poor, signal control management at this stage can not be adapted to, be badly in need of according to friendship
Prong transport need optimizes adjustment configuration to green time in signaling plan, while with parking section detector, electronics
The leading portions detection device such as police is gradually popularized, and a large amount of traffic flow datas, time headway waited car data all can be signal side
Case configuration provides data supporting.
Has some algorithm research for traffic signals arrangements at present, as patent CN201710148697.0 proposition is logical
Cross stop line section cross vehicle time data calculate intersection operation signaling plan, specifically include signal period duration, effectively
Long green light time etc.；Patent CN 201510606687.8 proposes a kind of intersection signal optimal control method of heterogeneous traffic behavior,
Optimize signal parameter according to the traffic characteristic of each entrance driveway and each phase saturation degree principle, realizes that intersection capacity is maximum
Change and utilizes.In to signal phase scheme in the research of long green light time, existing patent CN 201711082059.X proposes a kind of base
In when variable universe crossroad access signal lamp intelligent control method, it is dynamic according to maximum queue length in green light direction phase
State adjusts traffic lights cycle length and long green light time；Patent CN 201310143437.6 proposes a kind of Traffic Signal Timing method,
Optimize green time using segmented signal timing dial and Selecting phasing, and using linear programming；Patent CN 201611023279.0
It is proposed a kind of intersection phase time distribution method based on current demand balance, according to each lane it is green when demand to phase most
Short green time is allocated.
In view of the foregoing it is apparent that at present for traffic signals scheme and in the period signal phase long green light time it is existing compared with
More research, but existing research optimizes tune to next period long green light time for Real-Time Traffic Volume at this stage mostly
It is whole, and based on historical traffic flow data and saturation headway data to the Research on configuration of fixed cycle most short long green light time compared with
It is few, though patent CN 201611023279.0 according to it is green when demand assignment phase duration, the method for salary distribution is according only to transport need ratio
Example, fails demand refining lane.
Summary of the invention
The present invention is directed to increasingly sophisticated traffic, is based on traffic flow data and known traffic signals scheme, will believe
Number timing fining realizes the stage long green light time configuration of fining, improves each stage green light of traffic signals scheme to lane
Duration allocative efficiency.
The technical solution of the invention is as follows：
A kind of crossing signals phasing scheme long green light time configuration method, traffic flow data and saturation headstock based on each lane
When away from, conformity calculation obtain each current direction in crossing it is minimum green when demand, and phase rank is gone out based on signal phase Scheme Solving
The optimal solution of demand when section is minimum green；Include the following steps,
S1, crossing basic information collection can set often intersection channelization information, lamp group information, sensor information and crossing
It is acquired with current phase, determines that crossing traffic signal controls lane information；
S2, signal phase scheme are extracted, and are obtained unit interval internal detector and are acquired data, extract corresponding signal phase
Scheme；
S3, the demand when period is minimum green in each lane unit time is calculated, number is acquired based on the detector that step S2 is obtained
Accordingly and extract signal phase scheme, to it is minimum green in each lane signal period when demand calculate：
In formula, TjFor the period in each lane it is minimum green when demand, j is lane number；Q is the friendship of unit period inside lane
Through-current capacity；For the average saturation headway of unit period inside lane；T is the unit period；C is the cycle duration of configuration；
S is lane saturation degree, i.e., when vehicle is current by saturation stream mode to it is minimum green when demand solve；
S4, it determines demand when the period is minimum green in each current direction unit time, according to crossing lamp group information and can set
The convectional signals phase set determines the passage direction of each entrance driveway, and need when calculating minimum green in the period are concluded according to all directions
Seek Tj′；
S5, it determines signal phase each stage most short long green light time, this is determined based on the signal time distributing conception that step S2 is determined
The minimum long green light time in each current stage in the signaling plan period, to determine that each stage is most short green according to traffic administration demand
Lamp duration.
Further, step S1 specifically,
S11, acquisition intersection channelization information, crossing shape, area to be installed including crossing, crossing, dividing strip, lane
Number, lane width, and be numbered by entrance driveway and number of lanes, determine that lane number is j；
S12, lamp group information is acquired according to intersection channelization information, lists file names with the settable common clearance phase in crossing
Position i；
S13, each entrance driveway detector in binding crossing simultaneously determine that it detects lane region, and access each lane of crossing entrance driveway
The upper magnitude of traffic flow and saturation headway data.
Further, step S2 specifically,
S21, the initial signal phasing scheme configured in operation plan, including scheme time started, end time, letter are obtained
Number cycle duration C and signal phase scheme phase sequence determine that the long green light time of each current phase is Ti；
S22, it determines unit interval, obtains historical traffic flows and average saturation headway in unit interval, and
Extract corresponding initial signal phasing scheme in unit interval.
Further, in step S4, for a plurality of equidirectional lane, demand numerical value is the direction when pick-up road is maximum green
Demand when period is minimum green；For all-purpose road according to the hybrid directional of all-purpose road, crossing feature and entrance driveway wagon flow number
It is split according to vehicle flowrate.
Further, it for all-purpose road, specifically, extracting all-purpose road crosses the number plate information in car data, will mix
The car data of crossing in lane determines that the vehicle of all-purpose road flows to downstream inlet road number plate comparing, that is, determines all-purpose road vehicle
Stream ratio.
Further, in step S5, most short long green light time of each stage is determined according to traffic administration demand：
In formula, c be each signal phase it is green when summation duration；C is the signal phase regimen cycle duration of setting；TiIt is each
The long green light time of current phase；Tj' for entrance driveway each current direction period it is minimum green when demand.
Further, in step S5, if the signal phase stage be multiple current directions, the signal phase stage it is minimum green
When demand TiDemand max (T when should be greater than minimum green equal to multiple maximums for leading to directionj'), if current direction corresponds to multiple letters
Number phase, then the sum of demand ∑ T when multiple signal phase stages are minimum greeniIt should be greater than leading to jointly equal to multiple signal phases
Line direction it is minimum green when demand Tj′。
The beneficial effects of the invention are as follows：This kind of crossing signals phasing scheme long green light time configuration method, for signaling plan
Each phase long green light time allocation problem, the traffic flow data obtained based on crossing detector device and saturation headway letter
Demand calculates when ceasing minimum green to each lane period of entrance driveway in unit time section, and true according to canalization and lamp group information
Fixed each current direction it is minimum green when demand, according further to signal phase scheme corresponding in the period to each signal phase rank
The most short long green light time of section solves, to configure fixed signal phase scheme, and matching for induction type signal phase scheme
Set offer support foundation, while can the traffic flow data based on proxima luce (prox. luc) same day signaling plan is adjusted, effectively improve letter
The allocative efficiency of number scheme alleviates crossing traffic congestion.
Detailed description of the invention
Fig. 1 is the flow diagram of crossing signals phasing scheme long green light time configuration method of the embodiment of the present invention.
Fig. 2 is the canalization schematic diagram of crossroad in embodiment.
Fig. 3 is the schematic diagram for the magnitude of traffic flow that embodiment obtains each lane according to vehicle checker.
Fig. 4 is the schematic diagram of signal phase scheme in embodiment.
Specific embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Embodiment
A kind of crossing signals phasing scheme long green light time configuration method of embodiment, by obtaining intersection channelization, signal lamp
The traffic flow and saturation headway data that group, current phase, detector device acquire, extract the letter configured in unit interval
Number phasing scheme calculates demand when the period is minimum green in each lane unit interval, and is distributed according to canalization and lamp group information
To each current direction, thus solved on the basis of the signal phase stage each stage it is minimum green when demand, determine each signal rank
The most short long green light time of section provides support data for the configuration of fixed signaling plan and the configuration of induction type signaling plan, effectively mentions
High RST phasing scheme allocative efficiency
A kind of crossing signals phasing scheme long green light time configuration method, such as Fig. 1, traffic flow data based on each lane and full
And time headway, conformity calculation obtain each current direction in crossing it is minimum green when demand, and gone out based on signal phase Scheme Solving
The optimal solution of demand when phase is minimum green, the specific method is as follows：
S1：Crossing basic information collection can set often intersection channelization information, lamp group information, sensor information and crossing
It is acquired with current phase, determines that crossing traffic signal controls lane information.
S11：Acquire intersection channelization information, crossing shape, area to be installed including crossing, crossing, dividing strip, lane
The parameters such as number, lane width, and be numbered by entrance driveway and number of lanes, determine that lane number is j.Under normal circumstances, one
A crossroad is with the entrance driveway of all directions four, and there are three lanes for eastern entrance driveway tool, then eastern entrance driveway three lanes are distinguished
It is 11,12 and 13.
S12：Lamp group information is acquired according to intersection channelization information, lists file names with the common clearance that crossing can be set
Phase i.Under normal circumstances, the common clearance phase in crossroad includes：North and south is turned left, north orientation is current, south orientation is current, north and south is logical
Row, thing turn left, east orientation is current, west is directly right etc. to passage, thing passage, north and south straight trip, thing straight trip, the straight right, thing in north and south；
S13：It binds each entrance driveway detector in crossing and determines that it detects lane region, and access each lane of crossing entrance driveway
The upper magnitude of traffic flow and saturation headway data.
S2：Signal phase scheme is extracted, and is obtained unit interval internal detector and is acquired data, extracts corresponding signal phase
Scheme.
S21. the initial signal phasing scheme configured in operation plan, including scheme time started, end time, letter are obtained
Number cycle duration C and signal phase scheme phase sequence determine that the long green light time of each current phase is Ti。
S22. it determines unit interval, obtains historical traffic flows and average saturation headway in unit interval, and
Extract corresponding initial signal phasing scheme in unit interval.
S3：The demand when period is minimum green in each lane unit time is calculated, the data and extraction obtained based on step S2
Signal phase scheme, to it is minimum green in each lane signal period when demand calculate,
In formula：TjFor the period in each lane it is minimum green when demand, j is lane number；Q is the friendship of unit period inside lane
Through-current capacity；For the average saturation headway of unit period inside lane；T is the unit period, generally as unit of second s；C
For the cycle duration of configuration, generally as unit of second s；S is lane saturation degree, is under normal circumstances 1, i.e., vehicle presses saturated flow shape
When state is current to it is minimum green when demand solve.
S4：It determines demand when the period is minimum green in each current direction unit time, according to crossing lamp group information and can set
The convectional signals phase set determines the passage direction of each entrance driveway, and need when calculating minimum green in the period are concluded according to all directions
Seek Tj′。
Wherein for a plurality of equidirectional lane, when pick-up road is maximum green demand numerical value be the direction period it is minimum green when need
It asks, all-purpose road carries out vehicle flowrate according to the hybrid directional of all-purpose road, crossing feature and entrance driveway wagon flow data
It splits.Under normal circumstances, extract all-purpose road and cross the number plate information in car data, by all-purpose road cross car data and downstream into
Mouth road number plate comparing determines the vehicle flow direction of all-purpose road, that is, determines all-purpose road wagon flow ratio, and a such as crossing exists directly
Runway and straight trip and right-hand rotation all-purpose road, straight trip direction is main current direction, while extracting crossing straight trip and turning right
The mistake number plate information of all-purpose road and the mistake number plate data in each lane of downstream road junction entrance driveway simultaneously compare, and determine straight traffic
Number, to split straight trip and mixed flow proportion.
S5：It determines signal phase each stage most short long green light time, this is determined based on the signal time distributing conception that step S2 is determined
The minimum long green light time in each current stage in the signaling plan period, to determine that each stage is most short green according to traffic administration demand
Lamp duration, specific formula are as follows：
In formula：C be each signal phase it is green when summation duration；C is the signal phase regimen cycle duration of setting；TiIt is each
The long green light time of current phase；Tj' for entrance driveway each current direction period it is minimum green when demand；
Wherein, if the signal phase stage is multiple current directions, the signal phase stage it is minimum green when demand TiYing great
In be equal to multiple maximums for leading to direction it is minimum green when demand max (Tj'), if current direction corresponds to multiple signal phase stages,
The sum of demand ∑ T when then multiple signal phase stages are minimum greeniIt should be greater than passing through direction jointly equal to multiple signal phases most
Demand T when low greenj′.Such as crossing signals phase there are east orientation is current and thing straight trip phase, then when two stages are minimum green
The sum of demand should be greater than demand when east orientation keeps straight on minimum green, while the east orientation current stage should be greater than east orientation left-hand rotation and east orientation is turned right
Demand when maximum minimum green.
One specific example of embodiment is as follows：Certain crossroad, thing entrance driveway are that three lanes (turn left, straight trip, the right side
Turn), southern entrance driveway be turn left, straight trip and straight right three lanes, northern entrance driveway be turn left, straight trip and right-hand rotation Four-Lane Road, it is specific to be canalized
As shown in Figure 2.
According to operation plan and the magnitude of traffic flow, configurations are carried out to signaling plan in each period, which initially believes
Number scheme schedules plan is as shown in the table：
To meet crossing vehicle pass-through demand, with evening peak afternoon 18:15-18:30 periods were the case of this embodiment
Number of cases evidence, signaling plan cycle duration is 114s at this time, and scheme details are east orientation current (22s)+west to passage (34s)+north and south
Straight trip (24s)+north and south is turned left (22s), is obtained the magnitude of traffic flow in each lane according to vehicle checker, is detailed in Fig. 3.
Obtaining average saturation headway according to vehicle checker is 2.5-2.7 (the average saturation headway number of each entrance driveway
Value differs), it is assumed that saturation degree be 1 respectively to it is green in each lane cycle time section when demand calculate.Further according to patent
It is described to entrance driveway all directions it is minimum green when demand calculate, specific each numerical value is as shown in the table：
18:15-18:Signaling plan is that east orientation is current+western to passage+north and south straight trip+north and south left-hand rotation in 30 periods, successively
Assuming that each stage is Ti, and optimal is asked to the period most short long green light time according to the method, formula is as follows：
Min c=T1+T2+T3+T4
Because each phase duration should be rounded, then the most short long green light time of each stage signal phase is as follows：
| Signal phase | Most short long green light time (s) |
| East orientation is current | 22 |
| West is to passage | 37 |
| North and south straight trip | 22 |
| Turn left in north and south | 26 |
The remaining 7s time is configured into the amber light duration in each stage in period simultaneously, and concrete signal phasing scheme can be such as
Shown in Fig. 4, wherein each phase interval duration is shorter, can the period total duration suitably to this phase increase.
Claims (7)
1. a kind of crossing signals phasing scheme long green light time configuration method, it is characterised in that：Traffic flow data based on lane and
Saturation headway, conformity calculation obtain each current direction in crossing it is minimum green when demand, and be based on signal phase Scheme Solving
The optimal solution of demand when phase is minimum green out；Include the following steps,
S1, crossing basic information collection can set intersection channelization information, lamp group information, sensor information and crossing common logical
Row phase is acquired, and determines that crossing traffic signal controls lane information；
S2, signal phase scheme are extracted, and are obtained unit interval internal detector and are acquired data, extract corresponding signal phase side
Case；
S3, calculate demand when the period is minimum green in each lane unit time, the detector acquisition data obtained based on step S2 with
And extract signal phase scheme, to it is minimum green in each lane signal period when demand calculate：
In formula, TjFor the period in each lane it is minimum green when demand, j is lane number；Q is the traffic flow of unit period inside lane
Amount；For the average saturation headway of unit period inside lane；T is the unit period；C is the cycle duration of configuration；S is
When lane saturation degree, i.e. vehicle are current by saturation stream mode to it is minimum green when demand solve；
S4, the demand when period is minimum green in each current direction unit time is determined, according to crossing lamp group information and settable
Convectional signals phase determines the passage direction of each entrance driveway, and demand when calculating minimum green in the period is concluded according to all directions
Tj′；
S5, it determines signal phase each stage most short long green light time, this signal is determined based on the step S2 signal time distributing conception determined
The minimum long green light time in each current stage in regimen cycle, thus when determining most short green light of each stage according to traffic administration demand
It is long.
2. crossing signals phasing scheme long green light time configuration method as described in claim 1, it is characterised in that：Step S1 is specific
For,
S11, acquisition intersection channelization information, crossing shape, area to be installed including crossing, crossing, dividing strip, number of track-lines, vehicle
Road width, and be numbered by entrance driveway and number of lanes, determine that lane number is j；
S12, lamp group information is acquired according to intersection channelization information, lists file names with the settable common clearance phase i in crossing；
S13, each entrance driveway detector in binding crossing simultaneously determine that it detects lane region, and access each lane of crossing entrance driveway and submit
Through-current capacity and saturation headway data.
3. crossing signals phasing scheme long green light time configuration method as described in claim 1, it is characterised in that：Step S2 is specific
For,
S21, the initial signal phasing scheme configured in operation plan, including scheme time started, end time, signal week are obtained
Phase duration C and signal phase scheme phase sequence determine that the long green light time of each current phase is Ti；
S22, it determines unit interval, obtains historical traffic flows and average saturation headway in unit interval, and extract
Corresponding initial signal phasing scheme in unit interval out.
4. crossing signals phasing scheme long green light time configuration method as described in any one of claims 1-3, it is characterised in that：Step
In rapid S4, for a plurality of equidirectional lane, when pick-up road is maximum green demand numerical value be the direction period it is minimum green when demand；It is right
In all-purpose road, vehicle flowrate is split according to the hybrid directional of all-purpose road, crossing feature and entrance driveway wagon flow data.
5. crossing signals phasing scheme long green light time configuration method as claimed in claim 4, it is characterised in that：For hybrid vehicle
All-purpose road is crossed car data and downstream inlet Taoist monastic name specifically, extracting all-purpose road crosses the number plate information in car data by road
Board comparing determines the vehicle flow direction of all-purpose road, that is, determines all-purpose road wagon flow ratio.
6. crossing signals phasing scheme long green light time configuration method as described in claim 1, it is characterised in that：In step S5,
Most short long green light time of each stage is determined according to traffic administration demand：
In formula, c be each signal phase it is green when summation duration；C is the signal phase regimen cycle duration of setting；TiFor each passage
The long green light time of phase；Tj' for entrance driveway each current direction period it is minimum green when demand.
7. crossing signals phasing scheme long green light time configuration method as claimed in claim 6, it is characterised in that：In step S5,
If the signal phase stage is multiple current directions, the signal phase stage it is minimum green when demand TiIt should be greater than being equal to multiple lead to
Demand max (the T when maximum in direction is minimum greenj'), if current direction corresponds to multiple signal phase stages, multiple signal phases
The sum of demand ∑ T when stage is minimum greeniShould be greater than being equal to multiple signal phases pass through jointly direction it is minimum green when demand T 'j。
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| CN112967502B (en) * | 2021-02-25 | 2022-02-11 | 大连东软信息学院 | Traffic flow control method for crossroad |
| CN113393678A (en) * | 2021-08-17 | 2021-09-14 | 深圳市城市交通规划设计研究中心股份有限公司 | Conversion method, device and system for ring structure and stage structure signal schemes |
| CN113393678B (en) * | 2021-08-17 | 2022-01-07 | 深圳市城市交通规划设计研究中心股份有限公司 | Conversion method, device and system for ring structure and stage structure signal schemes |
| CN115035730A (en) * | 2022-04-13 | 2022-09-09 | 詹华 | Signal lamp control method for cross road section of upper bridge |
| CN116721548A (en) * | 2023-08-07 | 2023-09-08 | 深圳市城市交通规划设计研究中心股份有限公司 | Signal control method for safety switching of cross-period scheme |
| CN116721548B (en) * | 2023-08-07 | 2023-12-26 | 深圳市城市交通规划设计研究中心股份有限公司 | Signal control method for safety switching of cross-period scheme |
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