CN107730929B - Traffic signal control method under condition of asymmetric intersection flow - Google Patents
Traffic signal control method under condition of asymmetric intersection flow Download PDFInfo
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- CN107730929B CN107730929B CN201711223899.3A CN201711223899A CN107730929B CN 107730929 B CN107730929 B CN 107730929B CN 201711223899 A CN201711223899 A CN 201711223899A CN 107730929 B CN107730929 B CN 107730929B
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- G08—SIGNALLING
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- G08G1/00—Traffic control systems for road vehicles
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- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
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- G08G1/081—Plural intersections under common control
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Abstract
The invention provides a traffic signal control method under the condition of asymmetric intersection flow, which comprises the following steps: step 1, arranging an entrance vehicle detector near a first intersection entrance stop line; step 2, collecting real-time traffic flow data in the entrance vehicle detector, and dynamically configuring a phase according to the real-time traffic flow data; compared with the prior art, the method and the device can not only control the traffic signals of the crossing with the congestion, but also control the adjacent crossing by sequentially executing the fourth phase and the fifth phase and prolonging the direct green light lighting time of the adjacent crossing, thereby realizing the coordination of traffic dispersion of the adjacent crossing and avoiding the repeated congestion and anti-overflow congestion of the adjacent crossing.
Description
Technical Field
The invention belongs to the field of traffic signal control, and particularly relates to a traffic signal control method under the condition of asymmetric intersection flow.
Background
With the increasing of vehicles, the traffic flow on roads is also increasing, the traffic jam and the traffic accident on the roads are also increasing, and the urban traffic disease becomes the most troublesome problem in modern urban life.
In the prior art, most intersection release modes adopt a scheme that one set of phase sequence is fixed all day long or different phase sequence schemes are provided according to different time periods, at intersections with relatively large flow fluctuation, one set of phase sequence control is used at fixed time periods, the corresponding effect is not ideal, and for most intersection control schemes with large flow fluctuation, a multi-time period scheme strategy, an induction scheme, self-adaptive control and the like are adopted. The multi-period scheme needs traffic professionals to track the intersection situation year after year, and once the traffic flow trend changes, the corresponding scheme needs to be modified in time, but the scheme has relatively high requirements on designers and consumes more energy; in addition, the inductive control is a scheme for adjusting the release time in real time according to the traffic flow, and the inductive control must depend on the current phase sequence scheme, but the current phase sequence scheme cannot be modified, so that the processing effect is not obvious when the traffic flow is asymmetric in the north-south direction and the east-west direction, and even time is wasted.
Disclosure of Invention
The invention aims to provide a traffic signal control method under the condition of asymmetric intersection flow so as to meet the condition of asymmetric intersection flow.
In order to achieve the above purpose, the traffic signal control method under the condition of asymmetric intersection traffic of the invention comprises the following steps:
step 1: laying an entrance vehicle detector near the first intersection entrance stop line;
step 2: acquiring real-time traffic flow data in the entrance vehicle detector, and dynamically configuring a phase according to the real-time traffic flow data:
the traffic flow of the southbound straight-going inlet of the first road junction is A, the traffic flow of the southbound left-turning inlet of the first road junction is B, the traffic flow of the northbound straight-going inlet of the first road junction is C, the traffic flow of the northbound left-turning inlet of the first road junction is D,
(i) when a: B equals 1:1 and C: D equals 1:1,
then the first phase is performed: the first intersection moves straight in the south direction, and the first intersection turns left and simultaneously passes; the first road junction is straight in the north direction and is released when the first road junction turns left in the north direction;
(ii) when a: B is 1:2, C: D is 1:2, and B: D is 1:1, the second phase and the third phase are sequentially performed;
second phase: the first road port is enabled to go straight in the south direction and go straight in the north direction;
the third phase: the first road junction turns left in the south direction, and the first road junction turns left in the north direction and simultaneously passes.
Further, the traffic signal control method under the condition of asymmetric intersection flow further comprises the following steps:
and step 3: arranging an adjacent entrance vehicle detector near the second intersection entrance stop line;
and 4, step 4: an exit vehicle detector is arranged near an exit close to the second intersection on a main road between the first intersection and the second intersection, wherein the first intersection is adjacent to the second intersection; an exit vehicle detector is arranged near an exit close to the first intersection on a main road between the first intersection and the second intersection;
and 5: acquiring real-time traffic flow data in the adjacent entrance vehicle detector and the adjacent exit vehicle detector, and dynamically configuring a phase and a phase sequence according to the real-time traffic flow data;
the traffic flow of the south straight-going outlet of the second road junction is A ', the traffic flow of the north straight-going outlet of the first road junction is C', the traffic flow of the north straight-going inlet of the second road junction is E, the traffic flow of the south straight-going inlet of the second road junction is F,
(i) when C '> A' or E > F, the fourth phase and the fifth phase are executed in sequence,
and a fourth phase: the second intersection is straight in the north direction and is straight in the south direction;
a fifth phase: the south of the second intersection is straightly and independently released;
(ii) when C '< A', or E < F, a sixth phase or a seventh phase is performed,
sixth phase: the first road junction is forbidden to go straight in the north direction; the first intersection moves straight in the south direction, and the first intersection turns left and simultaneously passes;
a seventh phase: the first road port is prohibited to go straight in the north direction, and the first road port is prohibited to go left in the north direction; the first intersection moves straight in the south direction, and the first intersection turns left and simultaneously passes.
Compared with the prior art, the traffic signal control method under the condition of asymmetric intersection flow has the following advantages:
(1) the traffic control signals of each intersection are prevented from independently operating only according to the traffic condition of the intersection, and in the prior art, when congestion occurs at one intersection, repeated congestion easily occurs at the adjacent intersection, and vehicles run backwards to cause reverse overflow congestion; the invention can not only control the traffic signal of the crossing with congestion, but also control the adjacent crossing by sequentially executing the fourth phase and the fifth phase and prolonging the direct green light lighting time of the adjacent crossing, thereby realizing the coordination of the adjacent crossing to execute traffic dispersion and avoiding the repeated congestion and anti-overflow congestion of the adjacent crossing;
(2) in addition, when the road junction flow is asymmetric, the flow direction of vehicles with larger flow of straight going and left-turning vehicles is dredged by switching the first phase, the second phase and the third phase, and the waiting time of the vehicles on the road section with larger flow is reduced;
(3) in the peak period, traffic jam caused by sudden increase of flow or traffic accidents can be controlled by site traffic control personnel through the method disclosed by the invention, so that the vehicle jam at the adjacent intersection can be solved, and the site traffic control personnel can be reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a first intersection traffic;
FIG. 2 is a schematic diagram of a first intersection and a second intersection;
FIG. 3 is a schematic diagram of a first phase;
FIG. 4 is a schematic diagram of a second phase and a third phase;
FIG. 5 is a diagram illustrating a fourth phase and a fifth phase;
fig. 6 is a schematic diagram of a sixth phase and a seventh phase.
Description of reference numerals:
101-an entrance vehicle detector; 102-an exit vehicle detector; 103-adjacent entry vehicle detector.
Detailed Description
As shown in fig. 1, a traffic signal control method under the condition of asymmetric intersection traffic includes the following steps:
step 1: an entrance vehicle detector 101 is arranged near the first intersection entrance stop line;
step 2: acquiring real-time traffic flow data in the entrance vehicle detector 101, and dynamically configuring a phase according to the real-time traffic flow data:
the traffic flow of the southbound straight-going inlet of the first road junction is A, the traffic flow of the southbound left-turning inlet of the first road junction is B, the traffic flow of the northbound straight-going inlet of the first road junction is C, the traffic flow of the northbound left-turning inlet of the first road junction is D,
(i) when a: B equals 1:1 and C: D equals 1:1,
then the first phase is performed: the first intersection moves straight in the south direction, and the first intersection turns left and simultaneously passes; the first road junction is straight in the north direction and is released when the first road junction turns left in the north direction;
(ii) when a: B is 1:2, C: D is 1:2, and B: D is 1:1, the second phase and the third phase are sequentially performed;
second phase: the first road port is enabled to go straight in the south direction and go straight in the north direction;
the third phase: the first road junction turns left in the south direction, and the first road junction turns left in the north direction and simultaneously passes;
as shown in fig. 2, the present invention further comprises the steps of:
and step 3: arranging an adjacent entrance vehicle detector 103 near the second intersection entrance stop line;
and 4, step 4: the first intersection is adjacent to the second intersection, and an exit vehicle detector 102 is arranged near an exit close to the second intersection on the main road between the first intersection and the second intersection; arranging an exit vehicle detector 102 near an exit close to the first intersection on a main road between the first intersection and the second intersection;
and 5: acquiring real-time traffic flow data of the adjacent entrance vehicle detector 103 and the adjacent exit vehicle detector 102, and dynamically configuring phases and phase sequences according to the real-time traffic flow data:
the traffic flow of the south straight-going outlet of the second road junction is A ', the traffic flow of the north straight-going outlet of the first road junction is C', the traffic flow of the north straight-going inlet of the second road junction is E, the traffic flow of the south straight-going inlet of the second road junction is F,
(i) when C '> A' or E > F, the fourth phase and the fifth phase are executed in sequence,
and a fourth phase: the second intersection is straight in the north direction and is straight in the south direction;
a fifth phase: the south of the second intersection is straightly and independently released;
(ii) when C '< A', or E < F, a sixth phase or a seventh phase is performed,
sixth phase: the first road junction is forbidden to go straight in the north direction; the first intersection moves straight in the south direction, and the first intersection turns left and simultaneously passes;
a seventh phase: the first road port is prohibited to go straight in the north direction, and the first road port is prohibited to go left in the north direction; the first intersection moves straight in the south direction, and the first intersection turns left and simultaneously passes.
It should be noted that: based on the above phase and phase sequence schemes, those skilled in the art can use the prior art, such as the webster timing calculation formula, to perform phase timing, and derive a preferred crossing phase sequence scheme or period scheme.
The working principle of the method is as follows: an entrance vehicle detector 101 and an exit vehicle detector 102 arranged according to a first intersection; the invention can not only control the traffic signal of one crossing with congestion, but also control the adjacent crossing by sequentially executing the fourth phase and the fifth phase and prolonging the direct green light lighting time of the adjacent crossing by sequentially executing the fourth phase and the fifth phase, thereby realizing the coordination of the adjacent crossing to execute traffic dispersion and avoiding the repeated congestion and anti-overflow congestion of the adjacent crossing; in addition, when the road junction flow is asymmetric, the flow direction of vehicles with larger straight-going and left-turning flows is dredged by switching the first phase, the second phase and the third phase, and the waiting time of the vehicles on the road section with larger flow is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (1)
1. A traffic signal control method under the condition of asymmetric intersection flow is characterized by comprising the following steps:
step 1: laying an entrance vehicle detector near the first intersection entrance stop line;
step 2: acquiring real-time traffic flow data in the entrance vehicle detector, and dynamically configuring a phase according to the real-time traffic flow data:
the traffic flow of the southbound straight-going inlet of the first road junction is A, the traffic flow of the southbound left-turning inlet of the first road junction is B, the traffic flow of the northbound straight-going inlet of the first road junction is C, the traffic flow of the northbound left-turning inlet of the first road junction is D,
(i) when a: B equals 1:1 and C: D equals 1:1,
then the first phase is performed: the first intersection moves straight in the south direction, and the first intersection turns left and simultaneously passes; the first road junction is straight in the north direction and is released when the first road junction turns left in the north direction;
(ii) when a: B is 1:2, C: D is 1:2, and B: D is 1:1, the second phase and the third phase are sequentially performed;
second phase: the first road port is enabled to go straight in the south direction and go straight in the north direction;
the third phase: the first road junction turns left in the south direction, and the first road junction turns left in the north direction and simultaneously passes;
and step 3: arranging an adjacent entrance vehicle detector near the second intersection entrance stop line;
and 4, step 4: an exit vehicle detector is arranged near an exit close to the second intersection on a main road between the first intersection and the second intersection, wherein the first intersection is adjacent to the second intersection; an exit vehicle detector is arranged near an exit close to the first intersection on a main road between the first intersection and the second intersection;
and 5: acquiring real-time traffic flow data in the adjacent entrance vehicle detector and the adjacent exit vehicle detector, and dynamically configuring a phase and a phase sequence according to the real-time traffic flow data;
the traffic flow of the south straight-going outlet of the second road junction is A ', the traffic flow of the north straight-going outlet of the first road junction is C', the traffic flow of the north straight-going inlet of the second road junction is E, the traffic flow of the south straight-going inlet of the second road junction is F,
(i) when C '> A' or E > F, the fourth phase and the fifth phase are executed in sequence,
and a fourth phase: the second intersection is straight in the north direction and is straight in the south direction;
a fifth phase: the second intersection is independently released in a north-direction straight line way;
(ii) when C '< A', or E < F, a sixth phase or a seventh phase is performed,
sixth phase: the first road junction is forbidden to go straight in the north direction; the first intersection moves straight in the south direction, and the first intersection turns left and simultaneously passes;
a seventh phase: the first road port is prohibited to go straight in the north direction, and the first road port is prohibited to go left in the north direction; the first intersection moves straight in the south direction, and the first intersection turns left and simultaneously passes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108765991A (en) * | 2018-06-19 | 2018-11-06 | 北京建筑大学 | Signalized intersections anti-locking control system and method |
| CN108648460B (en) * | 2018-08-10 | 2021-03-16 | 江苏智通交通科技有限公司 | Intersection feature-based one-drag-two intersection traffic signal scheme configuration system |
| CN109360428B (en) * | 2018-12-12 | 2021-11-19 | 连云港杰瑞电子有限公司 | Method for monitoring bottleneck control state |
| JP7132165B2 (en) * | 2019-03-29 | 2022-09-06 | 本田技研工業株式会社 | Vehicle driving support device |
| CN112542051A (en) * | 2019-09-20 | 2021-03-23 | 华为技术有限公司 | Method, device and equipment for determining starting phase of intersection |
| CN113470390B (en) * | 2021-07-09 | 2022-08-05 | 公安部交通管理科学研究所 | Multiphase dynamic coordination control method for short-link intersection edge node fusion |
| CN115206114B (en) * | 2022-07-13 | 2023-12-05 | 广东振业优控科技股份有限公司 | Intersection traffic signal control method, system, equipment and medium for multiphase repeated amplification |
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| CN103093633A (en) * | 2011-10-28 | 2013-05-08 | 国际商业机器公司 | Adjustment system and method of traffic signal lamps |
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