CN109183535B - Urban expressway plane ramp control system capable of switching directions - Google Patents
Urban expressway plane ramp control system capable of switching directions Download PDFInfo
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- CN109183535B CN109183535B CN201811168084.4A CN201811168084A CN109183535B CN 109183535 B CN109183535 B CN 109183535B CN 201811168084 A CN201811168084 A CN 201811168084A CN 109183535 B CN109183535 B CN 109183535B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C1/00—Design or layout of roads, e.g. for noise abatement, for gas absorption
- E01C1/002—Design or lay-out of roads, e.g. street systems, cross-sections ; Design for noise abatement, e.g. sunken road
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The invention relates to a direction-switchable urban expressway plane ramp control system, which is mainly used for solving the problem of vehicle queuing at an urban plane ramp caused by the limitation of the number of openings of the current ramp and the fixation of the ramp form, so that the driving direction of the plane ramp allowed to pass in different periods is variable. The invention includes a detector, a display and a special ramp disposed between adjacent upstream exit ramps and downstream entry ramps. The specific working method comprises the following steps: if the detector detects that the main road is jammed, the special ramp is switched to an exit ramp; and if the detector detects that the main road is unblocked and the auxiliary road is blocked, the special ramp is switched to the entrance ramp. The ramp form is determined and changed through real-time traffic state detection, so that the problem of low vehicle passing efficiency at the plane ramp of the urban expressway caused by limited number of current ramp openings and fixed ramp form is effectively solved.
Description
Technical Field
The invention relates to a direction-switchable urban expressway plane ramp control system.
Background
The plane ramp is an important traffic facility for solving the problem that urban traffic flow enters a secondary road from a main road or enters the main road from the secondary road, and the number of openings of the plane ramp and the selection of the form of an inlet and an outlet play a vital role in the efficient evacuation of traffic flow of the main road and the secondary road.
At present, many urban expressways in China have the problem that ramp openings along roads are densely arranged, and the problem can frequently disturb traffic flow on the roads, so that the function of long-distance trip undertaken by the expressways is reduced, and the running speed of vehicles is influenced. In the aspect of selection of the entrance and exit forms, due to unreasonable traffic design stages and unstable traveling demands, situations often occur that the usage rate of an entrance ramp is low, vehicles of a main road at an exit ramp are queued too long, or the usage rate of an exit ramp is low, and vehicles of a secondary road at an entrance ramp are queued too long. This greatly affects the utilization of urban expressways and the operating efficiency of urban road traffic flow. Aiming at the vehicle queuing problem caused by the limitation of the number of the ramp openings of the express way and the fixation of the ramp form, the physical form of the plane ramp is reasonably designed, so that the plane ramp serves traffic flows in different flow directions under different traffic demand conditions and is an optimal solution.
Disclosure of Invention
The invention aims to solve the problems and establish a plane ramp control system of an urban expressway capable of switching directions, so that the driving directions of allowed traffic of the plane ramp in different time periods are variable.
The technical scheme of the invention is as follows: a plane ramp control system of an urban expressway capable of switching directions is disclosed, and comprises a first vehicle detector 1, a second vehicle detector 2, a special ramp 3, a first display 4 and a second display 5, wherein the first vehicle detector 1 is arranged on an outermost lane of a main road and is L1 away from an exit ramp, the second vehicle detector 2 is arranged on an auxiliary road and is L2 away from an entrance ramp; the special ramp 3 is positioned between an exit ramp and an entrance ramp which are adjacent, the first display 4 is arranged on the outermost lane of the main road and is L3 away from the exit ramp, and the second display 5 is arranged on the auxiliary lane and is 3L4 away from the special ramp;
the first vehicle detector 1 comprises a first vehicle inductor and a first turn controller; the first vehicle detector 1 will output pulse signal continuously after detecting the vehicle; the first turn controller comprises a first counter, a first comparator and a first memory, wherein the enabling end of the first counter is connected with the output end of the first vehicle sensor, the first counter generates an accumulated numerical value under a continuous pulse signal, the output end of the first counter is connected with one input end of the first comparator, the other input end of the first comparator is connected with the first memory, a first control threshold value is fixedly arranged in the first memory, namely, when the output value of the first counter is greater than a first control threshold value fixedly arranged in the first memory, the first comparator outputs a high-level signal;
the second vehicle detector 2 comprises a second vehicle sensor and a second turnstile controller; the second vehicle detector 2 continuously outputs pulse signals after detecting the vehicle; the second turn controller comprises a second counter, a second comparator and a second memory, wherein the enable end of the second counter is connected with the output end of the second vehicle sensor, the second counter generates an accumulated numerical value under a continuous pulse signal, the output end of the second counter is connected with two input ends of the second comparator, the other two input ends of the second comparator are connected with the second memory, and a second control threshold value is fixedly arranged in the second memory, namely when the output value of the second counter is greater than a second control threshold value fixedly arranged in the second memory, the second comparator outputs a high-level signal;
as shown in fig. 1, the special ramp 3 is composed of a first automatic lifting machine 6, a second automatic lifting machine 7 and a third automatic lifting machine 8 which are arranged in a staggered manner in sequence along the direction from the exit ramp to the entrance ramp, the first automatic lifting machine 6, the second automatic lifting machine 7 and the third automatic lifting machine 8 are all regular triangular prisms, and the top view of the staggered arrangement of the first automatic lifting machine 6, the second automatic lifting machine 7 and the third automatic lifting machine 8 is trapezoidal; the first automatic lifter 6, the second automatic lifter 7 and the third automatic lifter 8 can be lifted to the same maximum height, and the lowest height is flush with the ground;
the control enabling end of the first automatic elevator 6 is connected with the output ends of the first comparator and the second comparator, and the fixed control mode is that when the output signal of the first comparator is at a low level and the output signal of the second comparator is at a high level, the first automatic elevator 6 is lowered to be flush with the ground, and when the output signal of the first comparator is at a high level, the first automatic elevator 6 is raised to the maximum height; otherwise the first automatic elevator 6 rises to the maximum height;
the control enabling end of the second automatic elevator 7 is connected with the output ends of the first comparator and the second comparator, and the fixed control mode is that when the output signal of the first comparator is at a low level and the output signal of the second comparator is at a high level, the second automatic elevator 7 is lowered to be flush with the ground, and when the output signal of the first comparator is at a high level, the second automatic elevator 7 is lowered to be flush with the ground; otherwise the second automatic elevator 7 rises to the maximum height;
the control enabling end of the third automatic elevator 8 is connected with the output ends of the first comparator and the second comparator, and the fixed control mode is that when the output signal of the first comparator is at low level and the output signal of the second comparator is at high level, the third automatic elevator 8 rises to the maximum height, and when the output signal of the first comparator is at high level, the third automatic elevator 8 falls to be flush with the ground; otherwise the third automatic elevator 8 rises to the maximum height;
the enabling end of the first display 4 is connected with the output end of the first comparator, and the state of the special ramp 3 is indicated as an exit ramp when the first comparator outputs a high level signal;
the enabling end of the second display 5 is connected with the output ends of the first comparator and the second comparator, and indicates that the state of the special ramp 3 is an entrance ramp when the first comparator outputs a low level signal and the second comparator outputs a high level signal.
The working principle of the invention is as follows:
a special ramp is arranged between an adjacent upstream exit ramp and a downstream entrance ramp of the urban expressway, and the physical form of the plane ramp can be changed by the automatic lifting mode of different components; displays are arranged on the upstream of the exit ramp and the upstream of the special ramp to guide a driver to select the ramp; and vehicle detectors are arranged on the upstream of the exit ramp of the main road and the upstream of the entrance ramp of the auxiliary road. And monitoring the detention time of the vehicle in real time, and if the detention time of the vehicle exceeds a preset time threshold value, judging that the road is congested.
If the upstream of the exit ramp of the main road is judged to be road congestion, the number of vehicles leaving the main road and entering the auxiliary road is large, in order to ensure the passing of the vehicles on the main road, the special ramp is the exit ramp, and meanwhile, a display positioned on the upstream of the exit ramp displays a front exit ramp opening character to guide a driver to leave the main road and enter the auxiliary road; if the upstream of the exit ramp of the main road is not judged to be congested (unblocked) and the upstream of the entrance ramp of the auxiliary road is judged to be road congestion, the situation that the traffic condition of the main road is good and more vehicles are going to leave the auxiliary road and enter the main road is shown, the special ramp is an entrance ramp, and meanwhile, a display positioned at the upstream of the special ramp displays the character of 'opening the entrance ramp at the position', and a driver is guided to enter the main road.
In the invention, whether the road is congested is judged by combining the vehicle sensor, the counter and the comparator, and the method is simple, easy to realize and low in cost; the switching of the special ramp to the exit ramp or the entrance ramp is completed by adopting a mode that the automatic lifter is matched with the three triangular prism assemblies, the automatic lifter can complete lifting according to different signals output by the vehicle detector, and the control mode is simple and easy to realize. It can be obviously seen that the method of the invention is feasible and can effectively solve the problem of low vehicle passing efficiency at the urban plane ramp caused by limited number of the openings of the current ramp and fixed ramp form.
Drawings
FIG. 1 is a schematic view of the detector, display and ramp layout location of the present invention;
FIG. 2 is a flow chart of the judgment of the entrance and exit form of the special ramp of the present invention;
fig. 3 is a schematic diagram of the special ramps of the present invention as an entrance ramp (left) and an exit ramp (right).
Detailed Description
The technical solutions of the present invention have been described in detail in the summary of the invention, and are not described herein again.
It should be added that the above technical solution only selects two adjacent entrance ramp for demonstration so as to facilitate easier understanding of the solution of the present invention, and in fact, according to specific situations, technicians in the field can make various combinations, and create or modify special ramps at different locations according to needs. Meanwhile, the selection of the electronic devices used in the present invention is not illustrated herein, because these technologies are well-established and can be selected according to actual requirements (preference of cost, performance, etc.).
Claims (1)
1. The urban expressway plane ramp control system capable of switching directions is characterized by comprising a first vehicle detector (1) arranged on an outermost lane of a main road and having a distance L1 from an exit ramp, a second vehicle detector (2) arranged on an auxiliary road and having a distance L2 from an entrance ramp, a special ramp (3), a first display (4) and a second display (5); the special ramp (3) is positioned between the adjacent exit ramp and the entrance ramp, the first display (4) is arranged on the outermost lane of the main lane and is L3 away from the exit ramp, and the second display (5) is arranged on the auxiliary lane and is L4 away from the special ramp (3);
the first vehicle detector (1) comprises a first vehicle inductor and a first turnstile controller; the first vehicle detector (1) can continuously output pulse signals after detecting the vehicle; the first turn controller comprises a first counter, a first comparator and a first memory, wherein the enabling end of the first counter is connected with the output end of the first vehicle sensor, the first counter generates an accumulated numerical value under a continuous pulse signal, the output end of the first counter is connected with one input end of the first comparator, the other input end of the first comparator is connected with the first memory, a first control threshold value is fixedly arranged in the first memory, namely, when the output value of the first counter is greater than a first control threshold value fixedly arranged in the first memory, the first comparator outputs a high-level signal;
the second vehicle detector (2) comprises a second vehicle sensor and a second turnstile controller; the second vehicle detector (2) can continuously output pulse signals after detecting the vehicle; the second turn controller comprises a second counter, a second comparator and a second memory, wherein the enable end of the second counter is connected with the output end of the second vehicle sensor, the second counter generates an accumulated numerical value under a continuous pulse signal, the output end of the second counter is connected with two input ends of the second comparator, the other two input ends of the second comparator are connected with the second memory, and a second control threshold value is fixedly arranged in the second memory, namely when the output value of the second counter is greater than a second control threshold value fixedly arranged in the second memory, the second comparator outputs a high-level signal;
the special ramp (3) is composed of a first automatic lifting machine (6), a second automatic lifting machine (7) and a third automatic lifting machine (8) which are sequentially arranged in a staggered manner along the direction from an exit ramp to an entrance ramp, the first automatic lifting machine (6), the second automatic lifting machine (7) and the third automatic lifting machine (8) are all regular triangular prisms, and the top view of the first automatic lifting machine (6), the second automatic lifting machine (7) and the third automatic lifting machine (8) after staggered arrangement is trapezoidal; the first automatic lifter (6), the second automatic lifter (7) and the third automatic lifter (8) can be lifted to the same maximum height, and the lowest height is flush with the ground;
the control enabling end of the first automatic lifter (6) is connected with the output ends of the first comparator and the second comparator, and the fixed control mode is that when the output signal of the first comparator is at a low level and the output signal of the second comparator is at a high level, the first automatic lifter (6) descends to be flush with the ground, and when the output signal of the first comparator is at a high level, the first automatic lifter (6) ascends to the maximum height; otherwise the first automatic elevator (6) rises to the maximum height;
the control enabling end of the second automatic lifter (7) is connected with the output ends of the first comparator and the second comparator, and the fixed control mode is that when the output signal of the first comparator is at a low level and the output signal of the second comparator is at a high level, the second automatic lifter (7) descends to be flush with the ground, and when the output signal of the first comparator is at a high level, the second automatic lifter (7) descends to be flush with the ground; otherwise the second automatic elevator (7) rises to the maximum height;
the control enabling end of the third automatic elevator (8) is connected with the output ends of the first comparator and the second comparator, and the fixed control mode is that when the output signal of the first comparator is at a low level and the output signal of the second comparator is at a high level, the third automatic elevator (8) rises to the maximum height, and when the output signal of the first comparator is at a high level, the third automatic elevator (8) falls to be flush with the ground; otherwise the third automatic elevator (8) rises to the maximum height;
the enabling end of the first display (4) is connected with the output end of the first comparator, and the state of the special ramp (3) is indicated to be an exit ramp when the first comparator outputs a high level signal;
and the enabling end of the second display (5) is connected with the output ends of the first comparator and the second comparator, and when the first comparator outputs a low level signal and the second comparator outputs a high level signal, the state of the special ramp (3) is indicated as an entrance ramp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811168084.4A CN109183535B (en) | 2018-10-08 | 2018-10-08 | Urban expressway plane ramp control system capable of switching directions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811168084.4A CN109183535B (en) | 2018-10-08 | 2018-10-08 | Urban expressway plane ramp control system capable of switching directions |
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| Publication Number | Publication Date |
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| CN109183535A CN109183535A (en) | 2019-01-11 |
| CN109183535B true CN109183535B (en) | 2023-03-14 |
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| CN201811168084.4A Expired - Fee Related CN109183535B (en) | 2018-10-08 | 2018-10-08 | Urban expressway plane ramp control system capable of switching directions |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111915876B (en) * | 2019-05-08 | 2021-10-01 | 储诚茗 | Road traffic control system and control method thereof |
| CN111785022B (en) * | 2020-07-13 | 2023-09-05 | 上海市城市建设设计研究总院（集团）有限公司 | Urban expressway main and auxiliary system traffic arrangement structure and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3518622A (en) * | 1967-04-14 | 1970-06-30 | Lee Corp | Expressway ramp traffic control system |
| US4318079A (en) * | 1980-06-19 | 1982-03-02 | Dickinson Harry D | Motorized tire barrier and signal barrier traffic-way controller |
| GB2202562B (en) * | 1987-03-13 | 1991-07-03 | Yin Lung Yang | Road junction |
| JP3295876B2 (en) * | 1999-03-03 | 2002-06-24 | シー・ティ・マシン株式会社 | Vehicle guidance method, turning gate device and opening / closing gate device |
| RU56900U1 (en) * | 2006-06-29 | 2006-09-27 | Закрытое Акционерное Общество "Институт Метрогипротранс" | TRANSPORT NODE |
| KR101027684B1 (en) * | 2010-12-03 | 2011-04-12 | 문엔지니어링(주) | Electronic display for cracking down vehicle height |
| CN202584432U (en) * | 2012-05-25 | 2012-12-05 | 北京易华录信息技术股份有限公司 | Smart ramp control system |
| US9640072B2 (en) * | 2012-06-04 | 2017-05-02 | Tony D. White | Entrance and exit ramp safety system |
| CN202787126U (en) * | 2012-09-25 | 2013-03-13 | 深圳金语科技有限公司 | Main and auxiliary road part flow arrangement |
| CN102888817B (en) * | 2012-11-08 | 2014-08-27 | 陈科 | Truck bridge passing facility provided with hoisting body and capable of automatically preventing overweight |
| CN103208198B (en) * | 2013-02-26 | 2015-08-12 | 北京兴科迪科技有限公司 | The road junction vehicle guide sign device of blocked road and control method thereof and application |
| CN104809869A (en) * | 2015-04-10 | 2015-07-29 | 安徽四创电子股份有限公司 | Viaduct entrance ramp traffic state identifying method based on lifting height limiting rack |
| JP2017120024A (en) * | 2015-12-29 | 2017-07-06 | 肇 山口 | Above-road installation type disaster refuge facility |
| CN106781551B (en) * | 2017-03-08 | 2019-04-30 | 东南大学 | Expressway entrance and exit ring road combined control system and method under car networking environment |
| CN207503451U (en) * | 2017-11-27 | 2018-06-15 | 西南交通大学 | For the traffic indicating equipment of fast road ramp |
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