CN108389405B - Road traffic capacity control method - Google Patents
Road traffic capacity control method Download PDFInfo
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- CN108389405B CN108389405B CN201810379283.3A CN201810379283A CN108389405B CN 108389405 B CN108389405 B CN 108389405B CN 201810379283 A CN201810379283 A CN 201810379283A CN 108389405 B CN108389405 B CN 108389405B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
Abstract
The invention provides a road traffic capacity control method, which comprises the following steps: s1, acquiring road traffic information between two adjacent intersections, and calculating the average speed V1 of the road; s2, collecting signals in two adjacent crossroadsObtaining the average speed V2 of the downstream intersection by the intersection length D of the downstream intersection and the traffic flow information q 2; s3, determining the real-time traffic capacity q1 between two adjacent intersections and the maximum traffic capacity q between two adjacent intersections according to the information collected in the step S1 and the step S2
l(ii) a S4, comparing the traffic capacity q1 with the maximum traffic capacity q
lComparing, and adjusting the traffic volume between the adjacent intersections according to the comparison result; the traffic capacity of the intersection and the adjacent intersections can be accurately evaluated, and reasonable traffic control measures can be made according to the evaluation results.
Description
Technical Field
The invention relates to a traffic control method, in particular to a road traffic capacity control method.
Background
With the development of society, the reserved quantity of automobiles is gradually increased, however, the increment of roads for automobile driving is far less than the increasing speed of the reserved quantity of automobiles, which causes the congestion phenomenon of modern urban roads to be increasingly serious, but another problem of urban road congestion is that the traffic capacity of the roads is not reasonably controlled, because the urban roads have numerous intersections, the driving speed of the road sections between adjacent intersections is different from the driving speed of the road sections between adjacent intersections, the driving speed of the intersection is often lower than that of the road sections between adjacent intersections, and if the traffic capacity is not controlled, vehicles at downstream intersections overflow to the upstream, so that serious congestion is formed.
Therefore, in order to solve the above technical problems, it is necessary to provide a new solution.
Disclosure of Invention
In view of the above, the present invention provides a road traffic capacity control method, which can accurately evaluate traffic capacities of intersections and adjacent intersections, and make a reasonable traffic control measure according to an evaluation result, so as to effectively prevent urban traffic congestion and improve traffic efficiency of urban roads.
The invention provides a road traffic capacity control method, which comprises the following steps:
s1, acquiring road traffic information between two adjacent intersections, and calculating the average speed V1 of the road;
s2, acquiring intersection length D and traffic flow information q2 of a downstream intersection of two adjacent intersections, and solving an average vehicle speed V2 of the downstream intersection;
s3, determining the real-time traffic capacity q1 between two adjacent intersections and the maximum traffic capacity q between two adjacent intersections according to the information collected in the step S1 and the step S2
l；
S4, comparing the traffic capacity q1 with the maximum traffic capacity q
lThe comparison is made and the amount of traffic between adjacent intersections is adjusted based on the comparison.
Further, the traffic capacity q1 of a link between two adjacent intersections is calculated according to the following method:
establishing a traffic fluctuation model:
calculating the vehicle queuing length l between two adjacent intersections:
establishing a traffic flow and vehicle speed relation model q ═ kv (3), wherein k is traffic flow density;
the traffic capacity q1 of a link between two adjacent intersections is obtained by the joint type (1), (2) and (3):
further, the maximum traffic capacity q of two adjacent intersections is calculated according to the following formula
l：
Further, the time t for the vehicle to pass through a downstream intersection of two adjacent intersections is determined according to the following formula:
the invention has the beneficial effects that: by the method and the device, the traffic capacity of the intersection and the adjacent intersections can be accurately evaluated, and reasonable traffic control measures can be made according to the evaluation results, so that urban traffic jam can be effectively prevented, and the traffic efficiency of urban roads is improved.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a traffic diagram of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings of the specification:
the invention provides a road traffic capacity control method, which comprises the following steps:
s1, acquiring road traffic information between two adjacent intersections, and calculating the average speed V1 of the road;
s2, acquiring intersection length D and traffic flow information q2 of a downstream intersection of two adjacent intersections, and solving an average vehicle speed V2 of the downstream intersection;
s3, determining the real-time traffic capacity q1 between two adjacent intersections and the maximum traffic capacity q between two adjacent intersections according to the information collected in the step S1 and the step S2
l；
S4, comparing the traffic capacity q1 with the maximum traffic capacity q
lComparing, and adjusting the traffic volume between the adjacent intersections according to the comparison result, wherein the traffic volume between the adjacent intersections is adjusted by the following measures: firstly, the method comprises the following steps: the method can accurately evaluate the traffic capacity of the crossroads and the adjacent crossroads and make reasonable traffic control measures according to the evaluation result, thereby effectively preventing urban traffic jam and improving the traffic efficiency of urban roads.
In this embodiment, the traffic capacity q1 of a link between two adjacent intersections is calculated according to the following method:
establishing a traffic fluctuation model:
calculating the vehicle queuing length l between two adjacent intersections:
l＝(v
2-w
1) t (2), wherein t is the time when the vehicle passes through a downstream intersection of two adjacent intersections;
establishing a traffic flow and vehicle speed relation model q ═ kv (3), wherein k is traffic flow density;
the traffic capacity q1 of a link between two adjacent intersections is obtained by the joint type (1), (2) and (3):
Calculating the maximum traffic capacity q of two adjacent intersections according to the following formula
l：
Wherein, the time t when the vehicle passes through the downstream intersection of the two adjacent intersections is determined by the following formula:
The above-mentioned mid-upstream and downstream indicate that, in the traveling direction, the intersection ahead of the vehicle is the downstream intersection, and the rear is the upstream intersection, as shown in fig. 2, the upstream intersection, J2 is the downstream intersection, and in the traffic fluctuation map in fig. 2, a is an evanescent wave generation point, b is a concentrated wave generation point, c is a point at which the maximum queue length appears, d is an evanescent wave end point, W1 is the traffic concentrated wave velocity, and W2 is the traffic evanescent wave velocity.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (3)
1. A road traffic capacity control method is characterized in that: the method comprises the following steps:
s1, collecting road section traffic volume information between two adjacent road intersections and calculating the average speed V of the road section
1；
S2, collecting intersection length D and traffic flow information q of downstream intersection in two adjacent intersections
2And calculating the average speed V of the downstream intersection
2；
S3, determining the real-time traffic capacity q between two adjacent intersections according to the information collected in the step S1 and the step S2
1And the maximum traffic capacity q between two adjacent crossroads
l；
S4, traffic capacity q is measured
1And maximum traffic capacity q
lComparing, and adjusting the traffic volume between the adjacent intersections according to the comparison result;
calculating a traffic capacity q of a section between two adjacent intersections according to the following method
1：
Establishing a traffic fluctuation model:
wherein q is
2For the traffic flow of a downstream one of two adjacent crossroads, k
1Is the traffic flow density, k, of the section between two adjacent crossroads
2Is the traffic flow density of a downstream one of two adjacent intersections, W
1The wave speed of the traffic waves;
calculating the vehicle queuing length l between two adjacent intersections:
l＝(v
2-w
1) t (2), wherein t is the time when the vehicle passes through a downstream intersection of two adjacent intersections;
establishing a traffic flow and vehicle speed relation model q ═ kv (3), wherein k is traffic flow density;
the traffic capacity q1 of a link between two adjacent intersections is obtained by the joint type (1), (2) and (3):
2. the road traffic capacity control method according to claim 1, characterized in that: calculating the maximum traffic capacity q of two adjacent intersections according to the following formula
l：
3. The road traffic capacity control method according to claim 2, characterized in that: the time t for the vehicle to pass through a downstream intersection of two adjacent intersections is determined according to the following formula:
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| CN110047292A (en) * | 2019-05-29 | 2019-07-23 | 招商局重庆交通科研设计院有限公司 | Road section congestion warning method |
| CN111667700A (en) * | 2020-04-24 | 2020-09-15 | 安徽三联学院 | Intersection variable lane control method based on short-term traffic state prediction |
| CN114550471B (en) * | 2022-04-22 | 2022-08-23 | 四川九通智路科技有限公司 | Signal lamp control method and system for intelligent traffic |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001175982A (en) * | 1999-12-22 | 2001-06-29 | Toyota Central Res & Dev Lab Inc | Traffic volume estimating device |
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| CN102610094A (en) * | 2012-04-05 | 2012-07-25 | 郭海锋 | Traffic control method for dynamic coordination according to effective capacity of road section |
| CN102646330B (en) * | 2012-04-19 | 2014-07-02 | 浙江大学 | Intelligent calculating method for traffic relevancy of adjacent road junctions |
| US10121370B2 (en) * | 2014-09-20 | 2018-11-06 | Mohamed Roshdy Elsheemy | Comprehensive traffic control system |
| CN104851309B (en) * | 2015-06-01 | 2017-07-14 | 南京邮电大学 | A kind of implementation method of traffic guidance strategy |
| CN104966402B (en) * | 2015-06-05 | 2017-03-01 | 吉林大学 | Queue up and overflow preventing control method in a kind of supersaturation traffic flow crossing |
| CN106530763B (en) * | 2016-12-28 | 2019-02-01 | 东南大学 | The supersaturated traffic Adaptive Signal Control method that inlet flow rate is coupled with egress capacity |
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| JP2001175982A (en) * | 1999-12-22 | 2001-06-29 | Toyota Central Res & Dev Lab Inc | Traffic volume estimating device |
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