WO2010008242A2 - 2-phase signal intersection system - Google Patents
2-phase signal intersection system Download PDFInfo
- Publication number
- WO2010008242A2 WO2010008242A2 PCT/KR2009/003966 KR2009003966W WO2010008242A2 WO 2010008242 A2 WO2010008242 A2 WO 2010008242A2 KR 2009003966 W KR2009003966 W KR 2009003966W WO 2010008242 A2 WO2010008242 A2 WO 2010008242A2
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- WO
- WIPO (PCT)
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- turn
- vehicles
- signal
- straight
- road
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- 238000010276 construction Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 3
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 230000003796 beauty Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- 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
- E01C1/04—Road crossings on different levels; Interconnections between roads on different levels
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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
- E01C1/02—Crossings, junctions or interconnections between roads on the same level
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
Abstract
The present invention relates to a surface street intersection system which is capable of easily controlling straight-through runs, left turns and U-turns of vehicles by a two-phase signal intersection traffic signal consisting only of a straight-through signal and a stop signal. Therefore, a two-phase signal four-way intersection system is provided wherein left-turning vehicles together with right-turning vehicles make a right turn and then make a U-turn on the crossing road to thereby finally result in a left turn of the vehicles, only by a straight-through signal without a left turn signal. In this manner, since the left-turning vehicles make a right turn together with the right-turning vehicles, the inside-lane vehicles can always go straight only to thereby result in smooth traffic flows. Further, the traffic light at the intersection consists only of a straight-through signal and a stop signal, so a traffic signal waiting time of drivers can be greatly reduced to provide significantly increased traffic capacity.
Description
The present invention relates to an intersection system. More specifically, the present invention relates to a two-phase signal intersection system which is capable of effectively controlling straight-runs, left turns and U-turns of motor vehicles at the three- or four-way intersection.
Three- or four-forked roads, which are usually susceptible to heavy vehicular traffic, frequently encounter traffic interruptions due to the waiting of vehicles at the traffic signals.
Such interrupted traffic flows lead to decreased vehicle speed and frequent traffic jams, consequently resulting in potential economic loss of tremendous traffic congestion costs. In addition, air pollution and energy consumption may be significantly serious due to exhaust gases emitted during the idling of vehicles waiting for traffic signals to change.
As a scheme to cope with these problems, multi-level crossings including overpasses and underpasses have been conventionally constructed. However, construction of such alternative crossing structures suffers from various disadvantages such as enormous construction costs, significant maintenance and management expenses, and detrimental effects on the beauty of cities.
Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide an intersection system which is capable of achieving smooth vehicular traffic flow at intersections by simplification of a traffic signal system into a two-phase signal scheme and is also capable of significantly increasing traffic capacity of intersections by reduction of a traffic signal waiting time.
It is another object of the present invention to provide an intersection system which is capable of affording an intersection having traffic capacity comparable to multi-level crossings utilizing underpasses or overpasses while achieving the reduction of road construction costs.
It is yet another object of the present invention to provide an intersection system which is capable of offering driver conveniences due to feasibility of vehicular travel in all directions and is also capable of preventing possible traffic accidents by decreasing illegal driving for directional turns of vehicles.
In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of a two-phase signal four-way intersection system utilizing a two-phase traffic signal, wherein a traffic signal at the intersection is a 2-phase signal consisting of a straight-through signal and a stop signal with the exception of a left turn signal, and left-turning vehicles make a right turn in the right turn lane and then make a left turn by a vehicular U-turn at the crossroad while vehicles are going straight on a driving road (A).
Further, the intersection system is provided with a U-turn lane 31 where the vehicles, after right turning with right-turning vehicles to make a left turn, will wait for a U-turn.
Further, the intersection system is provided with a rear pedestrian crossing 42 at the rear of the intersection to secure a space where the vehicles after right turning with right-turning vehicles for making a left turn make a U-turn and wait for a straight-through signal and to afford a safe and convenient crossing for pedestrians.
In accordance with another aspect of the present invention, there is provided a two-phase signal three-way intersection system utilizing a two-phase traffic signal, wherein a traffic signal at the intersection is a 2-phase signal, and when straight-through vehicles of a straight-through road (C) stop in response to turn-on of a stop signal on the straight-through road (C), left-turning vehicles of the straight-through road (C) make a left turn in the right outer lane, and left-turning vehicles of a joining road (D) make a right turn in the right turn lane and then make a left turn by a vehicular U-turn on the straight-through road (C), such that vehicles of the straight-through road (C) and the joining road (D) can simultaneously make a left turn.
Further, the three-way intersection system is provided with a left turn lane 71 in the right outer lane of the straight-through road (C) in the traveling direction of vehicles and being not connected with the joining road (D), and a U-turn lane 72 in the right outer lane of the straight-through road (C) in the traveling direction of vehicles and being connected with the joining road (D) and allowing for a U-turn of a left-turning vehicles of the joining road (D) after right turning with the right-turning vehicles, such that vehicles of the straight-through road (C) and the joining road (D) can simultaneously make a left turn.
As illustrated hereinbefore, a two-phase signal intersection system of the present invention is capable of achieving a smooth traffic flow through the reduction of a traffic signal into a two-phase signal while allowing left turns of vehicles in all directions. As a result, the passage of the vehicles through the intersection can be sufficiently achieved only even with a straight-through signal and a stop signal without installation of a left turn signal, which results in a remarkable reduction of a traffic signal waiting time of drivers to thereby significantly increase traffic capacity of the intersection.
Further, reduction of the traffic signal waiting time leads to decreases in the risk of air pollution that may occur due to emission of exhaust gases during the idling of vehicles, and consequently prevention of energy loss due to such air pollution.
Further, when compared with the construction of overpasses or underpasses to provide a smooth traffic flow, the intersection system of the present invention can be implemented even with slight modification of an existing intersection without additional installation, which results in cost reduction and is therefore economically advantageous.
Further, the present invention is capable of preventing crossing accidents caused by pedestrians jaywalking at the intersection, is in compliance with the pedestrian-first policy, and is also capable of improving the beauty of roads due to excellent designability of the intersection.
FIG. 1 schematically illustrates a four-way intersection system in accordance with one embodiment of the present invention;
FIG. 2 illustrates a traffic flow of FIG. 1;
FIG. 3 schematically illustrates a three-way intersection system in accordance with one embodiment of the present invention; and
FIG. 4 illustrates a traffic flow of FIG. 3.
The present invention is directed to a two-phase signal intersection system which is capable of easily controlling straight-runs, left turns and U-turns of vehicles using an intersection signal consisting only of a straight-through signal and a stop signal. Specifically, left-turning vehicles make a right turn concurrently with right-turning vehicles and then make a left turn by a vehicular U-turn at the crossing road. Therefore, the present invention allows control of a vehicular traffic flow in all directions even with a two-phase signal.
Where left-turns of vehicles in all directions are permitted as in a conventional four-way intersection system, there are a left-turn lane and a U-turn lane in the center lane of a road, and an intersection signal is a 4-phase signal. For these reasons, the conventional four-way intersection system suffers from chronic problems such as prolonged signal-waiting time, heavy traffic congestion, and the like.
According to the intersection system of the present invention, the passage of vehicles through an intersection is achieved only with a straight-through signal and a stop signal without installation of a left turn signal, which therefore provides a viable solution to the problems as mentioned above.
The two-phase signal intersection system of the present invention may be applied to both of three-way intersection and four-way intersection. Specifically, by provision of a left turn lane for vehicles in a right lane of the road, the left-turning vehicles make a right turn toward the crossing road and then make a U-turn at the crossroad to finally accomplish a desired left turn of the vehicles.
Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
FIG. 1 schematically illustrates a two-phase signal four-way intersection system in accordance with one embodiment of the present invention, and FIG. 2 illustrates a traffic flow of FIG. 1. Referring to FIGS. 1 and 2, there is illustrated a driving road (A) for two-way straight travel of vehicles. During the vehicles are going straight on the driving road (A), straight-through vehicles stop before a first stop line 21 in response to a stop signal of a first traffic light 11, on a crossroad (B) being intersected with the driving road (A), whereas the vehicles, after right turning with the right-turning vehicles to make a left turn on the driving road (A) and then stopped before a U-turn lane 31, make a U-turn in response to a U-turn signal of a third traffic light 13 and then stop before a second stop line 22 in response to a stop signal of a second traffic light 12.
Further, the U-turning vehicles, stopping on a U-turn lane 32 (in the forward direction) before the first stop line 21, make a U-turn in response to a U-turn signal of the first traffic light 11, while pedestrians walk across a front pedestrian crossing 41 and a rear pedestrian crossing 42 in response to a pedestrian walk signal of a pedestrian crossing traffic light.
The two-phase signal four-way intersection system of the present invention does not involve installation of a left turn signal such that vehicular traffic flows in all directions can be controlled only with a two-phase signal. Instead of providing a left turn signal, the intersection system is provided with the U-turn lane 31 where the vehicles, after right turning with the right-turning vehicles for making a left turn, will wait for a U-turn, and the rear pedestrian crossing 42 at the rear of the intersection to secure a space where the vehicles turned right for making a left turn on the driving road (A) can make a U-turn and wait for a straight-through signal and to afford a safe and convenient crossing for pedestrians.
The vehicular traffic flow between the driving road A and the crossroad B shown in FIG. 2 is reversed over time. When straight-through vehicles of the driving road (A) stop, vehicles of the crossroad (B) go straight while left-turning vehicles among the vehicles of the crossroad (B) make a right turn to a right turn lane of the crossroad (B), make a U-turn on the driving road (A) and then wait before the second stop line. In this manner, traffic flows of the vehicles in all directions are repeatedly carried out at the four-way intersection.
FIG. 3 schematically illustrates a two-phase signal three-way intersection system in accordance with another embodiment of the present invention, and FIG. 4 illustrates a traffic flow of FIG. 3. Referring to FIGS. 3 and 4, straight-through vehicles of the straight-through road (C) stop before a first stop line 61 in response to a stop signal of a first traffic light 51. During the straight-through vehicles of the straight-through road (C) are stopping, left turn-waiting vehicles stopped in a left turn lane 71 which is an outside lane of the straight-through road (C) make a left turn in response to a left turn signal of a second traffic light 52. The left-turning vehicles on the joining road (D) make a right turn for a subsequent left turn and are then ready to wait for a next signal in a U-turn lane 72, and the waiting vehicles make a U-turn in response to a U-turn signal of a second traffic light 53 and then stop before a second stop line 62 in response to a stop signal of the second traffic light 52.
Further, the U-turning vehicles, stopping on a U-turn lane 73 (in the forward direction) before the first stop line 61, make a U-turn in response to a U-turn signal of the first traffic light 51, while pedestrians walk across an intersection pedestrian crossing 81 in response to a pedestrian walk signal of a pedestrian crossing traffic light.
In order to ensure that vehicular traffic flows in all directions can be accomplished only with a two-phase signal control, the two-phase signal three-way intersection system of the present invention is provided with the left turn lane 71 where left-turning vehicles of the straight-through road (C) will wait for a left turn, and the U-turn lane 72 where the vehicles turned right for a subsequent left turn on the joining road (D) will wait for a U-turn.
As apparent from the above description, the present invention enables effective left turns and U-turns of vehicles at the intersection. Therefore, the present invention provides a road system which is capable of reducing a traffic signal waiting time to afford a smooth traffic flow at the intersection and is also capable of contributing to easy and convenient driving of vehicle drivers, thereby lowering of a traffic accident rate.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
Claims (5)
- A two-phase signal four-way intersection system utilizing a two-phase traffic signal, whereina traffic signal at the intersection is a 2-phase signal consisting of a straight-through signal and a stop signal with the exception of a left turn signal, andleft-turning vehicles make a right turn in the right turn lane and then make a left turn by a vehicular U-turn at the crossroad while vehicles are going straight on a driving road.
- The intersection system according to claim 1, wherein the intersection system is provided with a U-turn lane where the vehicles, after right turning with right-turning vehicles to make a left turn, wait for a U-turn.
- The intersection system according to claim 1, wherein the intersection system is provided with a rear pedestrian crossing at the rear of the intersection to secure a space where the vehicles after right turning with right-turning vehicles for making a left turn make a U-turn and wait for a straight-through signal and to afford a safe and convenient crossing for pedestrians.
- A two-phase signal three-way intersection system utilizing a two-phase traffic signal, whereina traffic signal at the intersection is a 2-phase signal, andwhen straight-through vehicles of a straight-through road stop in response to turn-on of a stop signal on the straight-through road, left-turning vehicles of the straight-through road make a left turn in the right outer lane, and left-turning vehicles of a joining road make a right turn in the right turn lane and then make a left turn by a vehicular U-turn on the straight-through road, such that vehicles of the straight-through road and the joining road can simultaneously make a left turn.
- The intersection system according to claim 4, wherein the three-way intersection system is provided with:a left turn lane in the right outer lane of the straight-through road in the traveling direction of vehicles and being not connected with the joining road, anda U-turn lane in the right outer lane of the straight-through road in the traveling direction of vehicles and being connected with the joining road and allowing for a U-turn of a left-turning vehicles of the joining road after right turning with the right-turning vehicles, such that vehicles of the straight-through road and the joining road can simultaneously make a left turn.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2008-0070184 | 2008-07-18 | ||
| KR1020080070184A KR100893329B1 (en) | 2008-07-18 | 2008-07-18 | 2-phase signal intersection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2010008242A2 true WO2010008242A2 (en) | 2010-01-21 |
| WO2010008242A3 WO2010008242A3 (en) | 2010-05-27 |
Family
ID=40757741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2009/003966 WO2010008242A2 (en) | 2008-07-18 | 2009-07-17 | 2-phase signal intersection system |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100893329B1 (en) |
| WO (1) | WO2010008242A2 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102286902A (en) * | 2011-05-06 | 2011-12-21 | 卢泉生 | New method for eliminating road traffic jam |
| CN102330396A (en) * | 2011-07-05 | 2012-01-25 | 东南大学 | Intersection with pedestrian secondary waiting areas |
| CN102392398A (en) * | 2011-08-08 | 2012-03-28 | 上海市城市建设设计研究院 | Twice-parking left-turning lane structure |
| CN102605692A (en) * | 2012-03-14 | 2012-07-25 | 贾德玉 | Unobstructed flyover |
| CN102660912A (en) * | 2012-05-30 | 2012-09-12 | 中铁第四勘察设计院集团有限公司 | Safety warning method for widened area on inner side of small-radius curve of road |
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| JPH09125304A (en) * | 1995-11-02 | 1997-05-13 | Mitsubishi Heavy Ind Ltd | Grade separation facility |
| KR100195608B1 (en) | 1996-10-11 | 1999-06-15 | 신부용 | Crossing road and method of sign control |
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-
2008
- 2008-07-18 KR KR1020080070184A patent/KR100893329B1/en active IP Right Grant
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2009
- 2009-07-17 WO PCT/KR2009/003966 patent/WO2010008242A2/en active Application Filing
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| CN105046984A (en) * | 2015-08-27 | 2015-11-11 | 哈尔滨工业大学 | Traffic signal setting method for elimination of cross signal intersection left-turn phase |
| CN105279980A (en) * | 2015-11-05 | 2016-01-27 | 苏州设计研究院股份有限公司 | Method for judging whether signal control intersection adapts to continuous flow intersection transformation |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2010008242A3 (en) | 2010-05-27 |
| KR100893329B1 (en) | 2009-04-14 |
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