CN1240030C - A signal control method for junction of entrance ramp and main trunk road - Google Patents
A signal control method for junction of entrance ramp and main trunk road Download PDFInfo
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- CN1240030C CN1240030C CN 200410009290 CN200410009290A CN1240030C CN 1240030 C CN1240030 C CN 1240030C CN 200410009290 CN200410009290 CN 200410009290 CN 200410009290 A CN200410009290 A CN 200410009290A CN 1240030 C CN1240030 C CN 1240030C
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- trunk roads
- major trunk
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Abstract
The present invention relates to a control method of a signal at the confluence of an entrance bypath and an arterial road. An arterial road distance and velocity measuring instrument (9) measures the position and the velocity of a first vehicle at the upper position of an arterial road signal point (1) and delivers data to a single-chip microcomputer (11). If the vehicle is positioned in the control area of the arterial road by the single-chip microcomputer and the velocity of the vehicle is faster than a maximum limiting speed, the signal light (13) of a bypath is controlled to deliver a speed limiting signal to the vehicles (7), (8)in the control area of the bypath. A bypath distance and velocity measuring instrument (10) measures the position and velocity of the first vehicle at the upper position of a bypath signal point (1) and delivers the data to the single-chip microcomputer (11). If the vehicle is positioned in the bypath control area by the single-chip microcomputer and the velocity of the vehicle is faster than the maximum limiting speed, the signal light (12) of the arterial road is controlled to deliver the speed limiting signal to the vehicles (2), (3), (4) in the control area of the arterial road. The control method decreases mutual collision between vehicles of the bypath and the arterial road. The rate of traffic accidents can be reduced and the traffic capability of the arterial road can be fully utilized.
Description
Technical field
The present invention relates to the signal control method of Entrance ramp system in a kind of highway communication.
Background technology
The signal control method of Entrance ramp system is as " intelligent transportation control theory and application thereof " in the existing highway traffic, Liu Zhiyong, and described in 2003, there is the control of timing controlled and traffic responsive in Science Press.Time control method is according to historical traffic data, sets fixing ring road flow regulation rule, but the stable variation that can not adapt to the magnitude of traffic flow.The traffic responsive control method, be the transport need of detection of dynamic upstream major trunk roads and the traffic capacity of downstream major trunk roads, determine the ring road regulation rate according to difference then, the real-time change that can adapt to traffic flow, but the vehicle on the ring road is understood when importing major trunk roads and the vehicle of major trunk roads produces conflict, and potential safety hazard easily takes place.These two kinds of methods are purpose with the flow of regulating ring road and major trunk roads, do not consider the collision problem between ring road and the major trunk roads vehicle.The conflict of ring road vehicle and major trunk roads vehicle, can make and become the multiple location of traffic hazard near the ring road inlet, especially because the restriction of design factor or geographical conditions, near many Entrance ramps and major trunk roads point, driver on the major trunk roads can't see the vehicle on the ring road, and the driver on the ring road also can't see the vehicle on the major trunk roads, unless vehicle is very when the point, just can enter the other side's the visual field mutually, the vehicle of two fast running has little time brake when tending to owing to discovery the other side and causes traffic hazard, not only can cause traffic jam, reduces the traffic capacity of road, and can cause casualties, bring economic loss.
Summary of the invention
Technical matters to be solved by this invention:
In order to overcome the deficiency that existing control method can not solve ring road vehicle and the mutual collision problem of major trunk roads vehicle, the invention provides the signal control method of a kind of Entrance ramp and major trunk roads meet, can reduce the violent conflict between ring road vehicle and the major trunk roads vehicle, reduce the traffic hazard incidence, make full use of the traffic capacity of major trunk roads.
The technical scheme that the present invention takes:
At Entrance ramp and major trunk roads meet signalization point, major trunk roads control line and ring road control line are set respectively on major trunk roads before signaling point and the ring road, and the zone between major trunk roads control line and ring road control line and the signaling point is respectively major trunk roads control zone and ring road control zone.At the signal point position place opertaing device is installed, is mainly comprised major trunk roads ranging and range rate instrument, ring road ranging and range rate instrument, single-chip microcomputer and major trunk roads signal lamp, ring road signal lamp.In the control procedure, major trunk roads ranging and range rate instrument is measured on the major trunk roads signaling point upstream and is given single-chip microcomputer apart from the position and the speed of a motor vehicle of first nearest car of signaling point with the data transfer that records, if it is in the major trunk roads control zone, and the speed of a motor vehicle is greater than the Maximum speed limit v of regulation
Limit, single-chip microcomputer sends instruction, makes the ring road signal lamp send restricting signal for the vehicle in the ring road control zone, if vehicle does not also enter the control zone or the speed of a motor vehicle Maximum speed limit less than regulation, does not send restricting signal; Ring road ranging and range rate instrument measures that the signaling point upstream is apart from the position and the speed of a motor vehicle of first nearest car of signaling point on the ring road, and the data transfer that records is given single-chip microcomputer, if it is in the ring road control zone, and the speed of a motor vehicle is greater than the Maximum speed limit v of regulation
Limit, single-chip microcomputer sends instruction, makes the major trunk roads signal lamp send restricting signal for the vehicle in the major trunk roads control zone, if vehicle does not also enter the control zone or the speed of a motor vehicle Maximum speed limit less than regulation, does not send restricting signal.
The driver under the control signal that control device sends is guided, must observe a kind of new traffic rules when the ring road mouth of whistle control system is installed: 1. when not having control signal, vehicle can cruising; 2. when the control signal lamp glimmered, the vehicle driver in the control zone need adjust the driving condition of oneself, and the speed of a motor vehicle can not surpass Maximum speed limit v
Limitv
LimitValue can determine according to major trunk roads visible area length in the Entrance ramp system and ring road visible area length.
Beneficial effect of the present invention:
The present invention adopts a kind of brand-new Entrance ramp system signal control method, by speed limit to vehicle in the control zone, make vehicle when approaching ring road mouth, can make reaction timely to sailing the vehicle that comes on another road, thereby reduce the violent conflict between ring road vehicle and the major trunk roads vehicle, the generation that avoids traffic accident.Because the vehicle proportion that influenced by speed limit is less, thereby can not produce obvious negative effect, can make full use of the traffic capacity of major trunk roads the traffic capacity of major trunk roads.When the angular field of view on Entrance ramp system major trunk roads and the ring road was narrow, the effect of this control method was more remarkable.Controller principle of the present invention is simple, is easy to hardware and realizes that expense is low, and applicable scope is wide.
Description of drawings
Fig. 1 is Entrance ramp and major trunk roads meet signal control method synoptic diagram
Fig. 2 is Entrance ramp and major trunk roads meet signal control method equipment schematic
Fig. 3 is the influence of speed limit amplitude to accident rate
Fig. 4 is that vehicle flowrate advances car probability α with major trunk roads under the different speed limit conditions
1Changing Pattern
Fig. 5 is the influence of visible area length to the traffic hazard incidence
1. signaling point is put the vehicle of installing in opertaing device 2. major trunk roads control zones at this
3. the vehicle in the 4. major trunk roads control zones of the vehicle in the major trunk roads control zone
5. major trunk roads control line 6. ring road control lines
7. the vehicle in the 8. ring road control zones of the vehicle in the ring road control zone
9. major trunk roads ranging and range rate instrument 10. ring road ranging and range rate instrument
11. single-chip microcomputer 12. major trunk roads signal lamps 13. ring road signal lamps
A. B. ring road control zone, major trunk roads control zone
A
S. the major trunk roads visible area, the vehicle in this zone on major trunk roads and the ring road can be seen the other side mutually
B
S. the ring road visible area, the vehicle in this zone on major trunk roads and the ring road can be seen the other side mutually
L
As. the length of expression major trunk roads visible area, dimensionless
L
Bs. the length of expression ring road visible area, dimensionless
v
Limit. the speed limit that expression is set, dimensionless
α
1In cellular Automation Model, major trunk roads advances the car probability under the opening boundary condition
Embodiment
In conjunction with the accompanying drawings embodiments of the present invention are done a detailed description.
As shown in Figure 1, at the meet signalization point 1 of Entrance ramp and major trunk roads, 60～80 meters are provided with major trunk roads control line 5 in the major trunk roads upstream, and the zone between major trunk roads control line 5 and the signaling point 1 is major trunk roads control zone A; 60～80 meters are provided with ring road control line 6 in the ring road upstream, and the zone between ring road control line 6 and the signaling point 1 is ring road control zone B.At signaling point 1 place opertaing device is installed, is comprised major trunk roads ranging and range rate instrument 9, ring road ranging and range rate instrument 10, single-chip microcomputer 11, major trunk roads signal lamp 12, ring road signal lamp 13, as shown in Figure 2.In control procedure, major trunk roads ranging and range rate instrument 9 measure major trunk roads in the signaling point upstream apart from the position and the speed of a motor vehicle of first nearest car of signaling point, give single-chip microcomputer 11 with the data transfer that records, if it is in the major trunk roads control zone, and the speed of a motor vehicle is greater than the Maximum speed limit of regulation, and single-chip microcomputer sends instruction, makes ring road signal lamp 13 send restricting signal for the vehicle 7 and 8 in the ring road control zone, if vehicle does not also enter the control zone or the speed of a motor vehicle Maximum speed limit less than regulation, do not send restricting signal; The signaling point upstream is apart from the position and the speed of a motor vehicle of first nearest car of signaling point on the ring road ranging and range rate instrument 10 measurement ring roads, the data transfer that records is given single-chip microcomputer 11, if it is in the ring road control zone, and the speed of a motor vehicle is greater than the Maximum speed limit of regulation, single-chip microcomputer sends instruction, make major trunk roads signal lamp 12 send restricting signal for the vehicle 2,3,4 in the major trunk roads control zone,, do not send restricting signal if vehicle does not also enter the control zone or the speed of a motor vehicle Maximum speed limit less than regulation.Control signal adopts the mode of flicker green light.
Single-chip microcomputer is connected with major trunk roads ranging and range rate instrument 9, ring road ranging and range rate instrument 10, major trunk roads signal lamp 12, ring road signal lamp 13 respectively by optical cable.Among Fig. 2, vehicle 2 be in the major trunk roads control zone apart from first nearest car of signaling point, 8 is apart from first nearest car of signaling point in the ring road control zone.In the working control process, the position and the speed of a motor vehicle of major trunk roads ranging and range rate instrument 9 measuring vehicle 2, the data transfer that records is given single-chip microcomputer 11, if single-chip microcomputer is judged vehicle 2 in the control zone, and the speed of a motor vehicle has surpassed Maximum speed limit v
Limit, then sending controling instruction is given ring road signal lamp 13, makes ring road signal lamp 13 send restricting signal to the vehicle on the ring road 7,8, after the driver of vehicle 7,8 sees restricting signal, can in time adjust the transport condition of vehicle.Similarly, the position and the speed of a motor vehicle of ring road ranging and range rate instrument 10 measuring vehicle 8, the data transfer that records is given single-chip microcomputer 11, if single-chip microcomputer is judged vehicle 8 in the control zone, and the speed of a motor vehicle has surpassed Maximum speed limit v
Limit, then sending controling instruction is given major trunk roads signal lamp 12, makes major trunk roads signal lamp 12 send restricting signal to the vehicle on the major trunk roads 2,3,4, after the driver of vehicle 2,3,4 sees restricting signal, can in time adjust the transport condition of vehicle.
Experimental simulation:
Using cellular Automation Model simulates the traffic of quick major trunk roads Entrance ramp system.The traffic hazard incidence of primary study major trunk roads and Entrance ramp meet is with the relation of relevant factor.The length of control zone is taken as 60 meters.In simulation process, if on point upstream major trunk roads and the ring road apart from nearest first car of signaling point this moment all outside visible area, and next moment two car can arrive on the point of major trunk roads and ring road simultaneously, with certain probability P it is defined as a traffic hazard so, be without loss of generality, get P=1 in the simulation, the accident number of times that takes place in the unit interval is defined as accident rate.
The result of experimental simulation shows: under the effect of control signal, accident rate significantly reduces; The effect size of control signal not only with Maximum speed limit v
LimitRelevant, and with visible area A
SAnd B
SLength closely related.Fig. 3 is the influence of speed limit amplitude to accident rate, its horizontal ordinate be major trunk roads advance car probability α
1, ordinate is the traffic hazard incidence.Simulation finds, in the length one of the viewing area of Entrance ramp system regularly, and along with Maximum speed limit v
LimitReduce, accident rate reduces gradually, works as v
Limit＜L
As(L
Bs) after, accident rate reduces to 0.In simulation process, be provided with a virtual detector in somewhere, point downstream, detect the vehicle number that passes through in the unit interval, i.e. the magnitude of traffic flow.Fig. 4 is that vehicle flowrate advances car probability α with major trunk roads under the different speed limit conditions
1Changing Pattern, its horizontal ordinate be major trunk roads advance car probability α
1, ordinate is the vehicle flowrate of ring road downstream major trunk roads.Horizontal segment among Fig. 4, the expression road has reached the maximum traffic capacity.Simulation finds that owing to the number of the vehicle that influenced by speed limit is few, speed limit can not produce obvious influence to the total traffic capacity of system.Fig. 5 is the influence of visible area length to the traffic hazard incidence, its horizontal ordinate be major trunk roads advance car probability α
1, ordinate is the traffic hazard incidence.Analog result shows that under identical speed limit condition, visible area length is short more, and accident rate is just high more.Therefore in the working control process, controlled variable is not changeless, and should determine according to the actual conditions of Entrance ramp system, thereby reaches the purpose of effective control traffic hazard incidence.
Claims (1)
1. the signal control method of Entrance ramp and major trunk roads meet, it is characterized in that, at Entrance ramp and major trunk roads meet signalization point (1), on preceding major trunk roads of signaling point (1) and ring road, major trunk roads control line (5) and ring road control line (6) are set respectively, zone between major trunk roads control line (5) and ring road control line (6) and the signaling point (1) is respectively major trunk roads control zone and ring road control zone, locate to install major trunk roads ranging and range rate instrument (9) at signaling point (1), ring road ranging and range rate instrument (10) and major trunk roads signal lamp (12), ring road signal lamp (13), signaling point (1) upstream is apart from the position and the speed of a motor vehicle of nearest first car (2) of signaling point (1) on major trunk roads ranging and range rate instrument (9) the measurement major trunk roads, give single-chip microcomputer (11) with the data transfer that records, if it is in the major trunk roads control zone, and the speed of a motor vehicle is greater than the Maximum speed limit of regulation, single-chip microcomputer sends instruction, make ring road signal lamp (13) to the vehicle (7 in the ring road control zone, 8) send restricting signal, if vehicle does not also enter the major trunk roads control zone or the speed of a motor vehicle Maximum speed limit less than regulation, do not send restricting signal; Signaling point (1) upstream is apart from the position and the speed of a motor vehicle of nearest first car (8) of signaling point (1) on ring road ranging and range rate instrument (10) the measurement ring road, the data transfer that records is given single-chip microcomputer (11), if it is in the ring road control zone, and the speed of a motor vehicle is greater than the Maximum speed limit of regulation, single-chip microcomputer sends instruction, make major trunk roads signal lamp (12) to the vehicle (2 in the major trunk roads control zone, 3,4) send restricting signal, if vehicle does not also enter the ring road control zone or the speed of a motor vehicle Maximum speed limit less than regulation, do not send restricting signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410009290 CN1240030C (en) | 2004-07-01 | 2004-07-01 | A signal control method for junction of entrance ramp and main trunk road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410009290 CN1240030C (en) | 2004-07-01 | 2004-07-01 | A signal control method for junction of entrance ramp and main trunk road |
Publications (2)
| Publication Number | Publication Date |
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| CN1595468A CN1595468A (en) | 2005-03-16 |
| CN1240030C true CN1240030C (en) | 2006-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410009290 Expired - Fee Related CN1240030C (en) | 2004-07-01 | 2004-07-01 | A signal control method for junction of entrance ramp and main trunk road |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789183B (en) * | 2010-02-10 | 2012-02-15 | 北方工业大学 | Self-adaptive control system and method for entrance ramp |
| CN102542787B (en) * | 2010-12-30 | 2013-10-16 | 同济大学 | Flexible control system and method for urban expressway entrance ramp |
| CN102157072B (en) * | 2011-03-29 | 2013-03-20 | 北京航空航天大学 | Inducing device and inducing method of vehicle confluence at intersection based on vehicle and road crossing |
| CN104332071B (en) * | 2014-11-06 | 2017-11-03 | 长安大学 | A kind of ring road vehicle imports the safety reminding device and reminding method of major trunk roads |
| CN106128167A (en) * | 2016-07-13 | 2016-11-16 | 齐鲁工业大学 | Vehicle location display device near a kind of expressway ramp |
| CN106355905B (en) * | 2016-10-28 | 2018-11-30 | 银江股份有限公司 | A kind of overhead signal control method based on bayonet data |
| CN106981193B (en) * | 2017-04-20 | 2020-05-01 | 西南交通大学 | Entrance ramp traffic flow model simulation method based on interaction potential between vehicles |
| CN108510758B (en) * | 2018-05-24 | 2020-07-31 | 金陵科技学院 | Urban expressway entrance ramp signal control method based on video real-time information |
| CN110853371B (en) * | 2019-10-22 | 2021-10-12 | 天津易华录信息技术有限公司 | Expressway traffic optimization method and device based on variable speed limit |
| CN112201057B (en) * | 2020-09-08 | 2021-11-09 | 同济大学 | Expressway vehicle speed and ramp cooperative control method based on accident risk |
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2004
- 2004-07-01 CN CN 200410009290 patent/CN1240030C/en not_active Expired - Fee Related
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| CN1595468A (en) | 2005-03-16 |
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