CN110379183A - It is a kind of for alleviating the system and method for crossing traffic congestion - Google Patents
It is a kind of for alleviating the system and method for crossing traffic congestion Download PDFInfo
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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
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0137—Measuring and analyzing of parameters relative to traffic conditions for specific applications
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- G08G1/00—Traffic control systems for road vehicles
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Abstract
The invention discloses a kind of for alleviating the system of crossing traffic congestion, is respectively provided with first-level buffer area, Secondary buffer, buffer area signal lamp, traffic lights, camera in each crossing road；Wherein, it regard the region in the road of crossing within d meters of stop line as first-level buffer area, and all lanes in first-level buffer area are not provided with fixed driving direction；The driving direction of its fixation is respectively set in each lane using the region in addition to first-level buffer area in the road of crossing as Secondary buffer, and in Secondary buffer；Buffer area signal lamp is used to indicate the vehicle driving in Secondary buffer and enters first-level buffer area；The vehicle driving that traffic lights are used to indicate in first-level buffer area passes through crossing；The instruction of buffer area signal lamp in the method for the present invention is to be determined by traffic lights, and the instruction of traffic lights is determined by the monitored vehicle flowrate of camera with virtual coil, is the relationship of linkage between three.
Description
Technical Field
The invention relates to the technical field of regulation and control of complex intersections, in particular to a system and a method for relieving intersection traffic jam.
Background
With the development of social economy, cities are larger and larger, intersections are more and more, the problem of traffic congestion is more and more serious, the traffic congestion problem often appears in intersections, the traffic congestion of a certain lane on a road in a certain direction is serious, for example, straight vehicles are obviously more than left-turning vehicles, the vehicles on lighthouse form congestion on the straight lane, the left-turning lane is idle, or the left-turning vehicles are obviously more than the straight vehicles. For the condition that the number of two poles of vehicles in a straight lane and a left-turn lane are seriously differentiated, the space utilization rate of the lanes with sparse vehicles is low, and the passing efficiency of the crossroad is low.
The time space contradiction of the existing intersection road traffic system causes the disordered intersection traffic order and low traffic efficiency.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a system for relieving intersection traffic jam, which efficiently utilizes lanes with sparse vehicles by arranging a primary buffer area and a secondary buffer area, and improves the traffic efficiency of the vehicles in a spatial angle; the traffic flow of each road is monitored by arranging the camera so as to regulate and control the traffic signal lamp to indicate the passing time of each road in real time, the indication of the signal lamp in the buffer area is determined by the traffic signal lamp, the passing time of straight running and left turning in a certain congestion direction is further regulated, and the three have a linkage effect, so that the passing efficiency of vehicles is improved in the time angle.
In order to achieve the purpose, the invention adopts the following technical scheme that:
a system for relieving intersection traffic jam, the intersection comprises a plurality of roads, each intersection road is provided with a plurality of lanes; the system is provided with a primary buffer area, a secondary buffer area, buffer area signal lamps and traffic signal lamps on each intersection road; wherein,
taking areas within d meters from stop lines on a plurality of lanes in the road of the intersection as primary buffer areas; all lanes in the primary buffer area are not provided with fixed driving directions;
taking the area except the primary buffer area in the road of the intersection as a secondary buffer area; the vehicle firstly passes through the secondary buffer zone, then passes through the primary buffer zone and finally passes through the intersection; the fixed driving direction of each lane in the secondary buffer area is respectively set, namely, a plurality of lanes in different directions are arranged in the secondary buffer area;
the buffer zone signal lamp is used for indicating the vehicles on a certain direction lane in the secondary buffer zone to run into the primary buffer zone and allowing the vehicles on the direction lane to run into any lane in the primary buffer zone;
the traffic signal lamp is used for indicating all vehicles in the primary buffer zone to run through the intersection according to the direction indicated by the traffic signal lamp.
N lanes in different directions are arranged in the secondary buffer area; with AiDenotes direction, i ═ 1,2, … N; and the passing sequence of the N different directions is A1,A2,…ANThat is, the traffic signal lights indicate the passing sequence of the N different directions to be A1,A2,…AN；
The buffer area signal lamp indication rule is as follows:
when the traffic signal lamp indicates the direction A1,A2,…ANWhen the traffic lights are all impassable, at the moment, the signal lights in the buffer area indicate the direction A1Passing, i.e. indicating direction A in the secondary buffer1The vehicle on the lane enters a primary buffer zone;
when the traffic signal lamp indicates the direction AiThe passing residual time of tiSecond, at this time, buffer signal lampIndicating the direction Ai+1Passing, i.e. indicating direction A in the secondary bufferi+1The vehicle on the lane enters a primary buffer zone;
wherein i is 1,2, … N; and if i is equal to N, indicating the direction A at the traffic signal lampNThe passing residual time of tNAt second, the signal lamp in the buffer area indicates the direction A1Passing, i.e. indicating direction A in the secondary buffer1The vehicle on the lane enters a primary buffer zone;
by analogy, the signal lamps in the buffer area carry out circular indication according to the mode;
and vehicles running into the first-level buffer zone all run through the intersection according to the current indication direction of the traffic signal lamps.
The system also comprises a camera arranged on the road and used for monitoring the traffic flow on the road;
the traffic signal lamp indicates the direction AiTotal time of passage TiAccording to the direction A in the secondary bufferiThe ratio of the total traffic flow of the lanes to the total traffic flow of the whole intersection, and the direction A according to the secondary buffer areaiThe proportion of the total traffic flow of the road at the intersection where the lane is located is adjusted.
The invention also provides a system for relieving traffic jam at the intersection, wherein the intersection is a crossroad, and each intersection road is provided with a left-turn lane, a straight-going lane and a right-turn lane; the indication rule of the traffic signal lamp of each intersection road is that the traffic signal lamp firstly goes straight and then turns left;
each intersection road is provided with a primary buffer area, a secondary buffer area, a buffer area signal lamp and a traffic signal lamp which correspond to each intersection road; wherein,
taking the area within d meters from the stop line on the left-turn lane and the straight lane in the road of the intersection as a primary buffer area, wherein the left-turn lane and the straight lane in the primary buffer area are not provided with fixed driving directions;
taking the areas except the primary buffer area on the left-turn lane and the straight lane in the road of the intersection as secondary buffer areas; the vehicle firstly passes through the secondary buffer zone, then passes through the primary buffer zone and finally passes through the intersection;
the buffer zone signal lamp is used for indicating the vehicles on a certain direction lane in the secondary buffer zone to run into the primary buffer zone and allowing the vehicles on the direction lane to run into any lane in the primary buffer zone;
the traffic signal lamp is used for indicating all vehicles in the primary buffer zone to run through the intersection according to the direction indicated by the traffic signal lamp.
The indication rules of the buffer zone signal lamps of each intersection road are as follows:
when the traffic signal lamps of the road at the intersection display that both straight-going and left-turning are not available, the signal lamps of the buffer area indicate straight-going, namely, the vehicles on the straight-going lane in the secondary buffer area are indicated to enter the left-turning lane and the straight-going lane in the primary buffer area;
when the traffic signal lamps of the road at the intersection display that the remaining time of straight running is m seconds, the buffer zone signal lamps indicate left-turn running and straight running is forbidden, namely, the vehicles on the left-turn lane in the secondary buffer zone are indicated to run into the left-turn lane and the straight lane in the primary buffer zone, and meanwhile, the vehicles on the straight lane in the secondary buffer zone are forbidden to run into the left-turn lane and the straight lane in the primary buffer zone;
when the traffic signal lamps of the road at the intersection display that the left turn time is n seconds, the buffer area signal lamps indicate that the left turn is forbidden and the vehicle passes straight, namely, the vehicle on the straight lane in the secondary buffer area is indicated to enter the left turn lane and the straight lane in the primary buffer area, and meanwhile, the vehicle on the left turn lane in the secondary buffer area is forbidden to enter the left turn lane and the straight lane in the primary buffer area;
by analogy, the signal lamp of the buffer area of each intersection road carries out circular indication according to the mode;
and vehicles running into the first-level buffer zone all run through the intersection according to the current indication direction of the traffic signal lamps.
The crossroad comprises a north-south road and an east-west road; the east-west direction includes east-to-west and west-to-east directions; the north-south directions include south-to-north and north-to-south directions;
the method comprises the steps that a camera with a virtual coil is arranged on each road and used for monitoring traffic flow on each road, and the total number of vehicles in the east-west direction is monitored to be NumThings (Earthwest)And the total number of vehicles in the north-south direction is NumNorth and south；
The total number Num of vehicles in the east-west directionThings (Earthwest)The total number of vehicles on a straight lane and a left-turn lane in a secondary buffer zone on an intersection road in the east-west direction is determined;
the total number Num of vehicles in the north-south directionNorth and southThe total number of vehicles on a straight lane and a left-turn lane in a secondary buffer area on a road at the intersection in the south-north direction;
setting: the total time for completing one-time passage in the north-south direction and the east-west direction of the crossroad is T, wherein the total time for the passage in the north-south direction is TNorth and south(ii) a The total time of passing in the east-west direction is TThings (Earthwest)(ii) a I.e. T ═ TNorth and south+TThings (Earthwest)；
When in useThen the total time of passing in the north-south direction isThe total time of passing in the east-west direction is
When in useThen the total time of passing in the north-south direction isTotal time of the east-west trafficIs composed of
When in useOrThen the total time of passing in the north-south direction isThe total time of passing in the east-west direction is
Total time T of passing in north and south directionsNorth and southThe method comprises the following steps: total straight-ahead time in north-south direction isTotal time of left turn in north-south direction isAnd is
The total number Num of vehicles in the north-south directionNorth and southThe method comprises the following steps: the total number of left-turn vehicles in the north-south direction, namely the total number of vehicles on the left-turn lanes in the secondary buffer zone on the intersection road in the north-south direction isThe total number of straight-going vehicles in the north-south direction, i.e. the total number of vehicles on the straight-going lanes in the secondary buffer zone on the intersection road in the north-south direction isAnd is
When in useThen the total straight-going time in the north-south direction isTotal time of left turn in north-south direction
When in useThen the total straight-going time in the north-south direction isTotal time of left turn in north-south direction
When in useOrThe total time of straight traveling in the north-south direction isTotal time of left turn in north-south direction
Total time T of passing in the east-west directionThings (Earthwest)The method comprises the following steps: the total straight-ahead time in the east-west direction isThe total time of left turn in east-west direction isAnd is
The total number Num of vehicles in the east-west directionThings (Earthwest)The method comprises the following steps: the total number of left-turn vehicles in the east-west direction, i.e. the total number of vehicles on the left-turn lane in the secondary buffer zone on the crossing road in the east-west direction isThe total number of straight-going vehicles in the east-west direction, i.e. the total number of vehicles on the straight-going lane in the secondary buffer zone on the road at the crossing in the east-west direction isAnd is
When in useThen the total straight-going time in the east-west direction isTotal time of left turn in east-west direction
When in useThen the total straight-going time in the east-west direction isTotal time of left turn in east-west direction
When in useOrThe total straight-ahead time in the east-west direction isTotal time of left turn in east-west direction
m＝10～15；n＝6～10。
An area within d meters from the stop line on a single lane in the intersection road is required as an area to accommodate three vehicles.
Dividing a first-level buffer area in the intersection road into an area A and an area B; the area A is close to the stop line, and the area B is close to the secondary buffer area; the size of a single lane in the area B is the size of accommodating one vehicle; when a vehicle on a certain lane in the secondary buffer zone enters the primary buffer zone, the area A is required to be stopped fully, and then the area B is required to be stopped.
The invention has the advantages that:
(1) the buffer area is added on the road of the intersection and is divided into a first-level buffer area and a second-level buffer area, the first-level buffer area plays a role in buffering a main space, the second-level buffer area is equivalent to a buffer pool before entering the first-level buffer area, for example, 6 vehicles can be parked in the first-level buffer area arranged aiming at the intersection, and compared with the existing intersection arrangement, the arrangement of the first-level buffer area ensures that the spaces of a straight lane and a left-turn lane can be simultaneously utilized when straight vehicles or left-turn vehicles pass through the intersection; when few left-turning vehicles are available, the idle left-turning lane is efficiently utilized; when the number of straight-going vehicles is small, the idle straight-going lane is efficiently utilized; thereby improving the traffic efficiency of the vehicle in a spatial angle.
(2) According to the invention, through arranging the buffer area and the buffer area signal lamps and adjusting the indication rule of the buffer area signal lamps according to the traffic signal lamps, straight-going vehicles and left-turning vehicles on the road at the intersection can orderly and respectively enter the first-level buffer area, so that the passing efficiency of the intersection is improved, the queuing and waiting time of the vehicles is reduced, the traffic jam is reduced, and the safety and the traveling efficiency of urban traffic are improved.
(3) The invention arranges the camera with the virtual coil on the road of the intersection to monitor the traffic flow of the vehicles coming and going, to regulate and control the passing time of the traffic signal lamp indicating the east-west direction and the south-north direction in real time, and further to regulate the passing time of the straight and left-turning in a certain congestion direction, thereby improving the passing efficiency of the vehicles in time.
(4) The buffer area signal lamp can enable a driver to clearly and definitely enter the primary buffer area, the indication of the buffer area signal lamp is determined by the traffic signal lamp, the indication rule of the traffic signal lamp is determined by the traffic flow monitored by the camera with the virtual coil, and the buffer area signal lamp, the traffic signal lamp and the traffic flow are in a linkage relation.
(5) The buffer area is arranged, so that the utilization rate of the space is more efficient, the real-time traffic time regulation and control and the efficient utilization of the space are combined together, and the traffic efficiency of vehicles is improved from the aspects of time and space, so that the real problem of one-way road congestion at intersections is solved.
(6) In the invention, a first-level buffer area in the road at the intersection is divided into an area A and an area B; the area A is close to the stop line, and the area B is close to the secondary buffer area; the size of a single lane in the area B is the size of accommodating one vehicle; when a vehicle on a certain lane in the secondary buffer zone enters the primary buffer zone, the area A is required to be stopped fully, and then the area B is required to be stopped, so that the situation that a straight lane or a left-turn lane in the secondary buffer zone cannot enter the primary buffer zone due to the fact that a certain single lane of the primary buffer zone is stopped fully is avoided.
Drawings
Fig. 1 is a road plan view of an intersection in the first embodiment.
Fig. 2 shows a time allocation manner of each road in the first embodiment.
Fig. 3 is a time allocation manner of left turn and straight going of each road, taking the north-south direction as an example of the congestion direction in the first embodiment.
In fig. 1, 1 denotes a primary buffer area, 2 denotes a secondary buffer area, 3 denotes a buffer area signal lamp, 4 denotes a traffic signal lamp, and 5 denotes a camera with a virtual coil.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Based on the existing traffic design, one intersection is provided with roads in multiple directions, and each intersection road is provided with lanes in multiple driving directions, so that the intersection can pass in multiple directions.
A system for relieving intersection traffic jam is provided, wherein each intersection road is provided with a primary buffer area, a secondary buffer area, a buffer area signal lamp and a traffic signal lamp. Wherein,
taking areas within d meters from stop lines on a plurality of lanes in the road of the intersection as primary buffer areas; all lanes in the primary buffer area are not provided with fixed driving directions;
taking the area except the primary buffer area in the road of the intersection as a secondary buffer area; the vehicle firstly passes through the secondary buffer zone, then passes through the primary buffer zone and finally passes through the intersection; the fixed driving direction of each lane in the secondary buffer area is respectively set, namely, a plurality of lanes in different directions are arranged in the secondary buffer area;
the buffer zone signal lamp is used for indicating the vehicles on a certain direction lane in the secondary buffer zone to run into the primary buffer zone and allowing the vehicles on the direction lane to run into any lane in the primary buffer zone;
the traffic signal lamp is used for indicating all vehicles in the primary buffer zone to run through the intersection according to the direction indicated by the traffic signal lamp.
N lanes in different directions are arranged in the secondary buffer area; with AiDenotes direction, i ═ 1,2, … N; and the passing sequence of the N different directions is A1,A2,…ANThat is, the traffic signal lights indicate the passing sequence of the N different directions to be A1,A2,…AN；
The buffer area signal lamp indication rule is as follows:
when the traffic signal lamp indicates the direction A1,A2,…ANWhen the traffic lights are all impassable, at the moment, the signal lights in the buffer area indicate the direction A1Passing, i.e. indicating direction A in the secondary buffer1The vehicle on the lane enters a primary buffer zone;
when the traffic signal lamp indicates the direction AiThe passing residual time of tiSecond, at this point, the buffer signal light indicates direction Ai+1Passing, i.e. indicating direction A in the secondary bufferi+1The vehicle on the lane enters a primary buffer zone;
wherein i is 1,2, … N; and if i is equal to N, indicating the direction A at the traffic signal lampNThe passing residual time of tNAt second, the signal lamp in the buffer area indicates the direction A1Passing, i.e. indicating direction A in the secondary buffer1The vehicle on the lane enters a primary buffer zone;
by analogy, the signal lamps in the buffer area carry out circular indication according to the mode;
and vehicles running into the first-level buffer zone all run through the intersection according to the current indication direction of the traffic signal lamps.
The system also comprises a camera with a virtual coil, which is arranged on each road and is used for monitoring the traffic flow on each road;
the traffic communicationSignal lamp indicating direction AiTime of passage TiAccording to the direction A in the secondary bufferiThe ratio of the traffic flow of the lane to the total traffic flow of the whole intersection, and the direction A in the secondary buffer zoneiThe proportion of the traffic flow of the lane in the total traffic flow of the road where the lane is located is adjusted.
In the invention, a first-level buffer area in the road at the intersection is divided into an area A and an area B; the area A is close to the stop line, and the area B is close to the secondary buffer area; the size of a single lane in the area B is the size of accommodating one vehicle; when a vehicle on a certain lane in the secondary buffer zone enters the primary buffer zone, the area A is required to be stopped fully, and then the area B is required to be stopped, so that the situation that a straight lane or a left-turn lane in the secondary buffer zone cannot enter the primary buffer zone due to the fact that a certain single lane of the primary buffer zone is stopped fully is avoided.
The first embodiment is as follows:
as illustrated by fig. 1, a system for alleviating traffic congestion at an intersection is provided:
the crossroad comprises a north-south road and an east-west road; the east-west direction includes east-to-west and west-to-east directions; the north-south directions include south-to-north and north-to-south directions;
each intersection road is provided with a left-turn lane, a straight lane and a right-turn lane; the indication rule of the traffic signal lamp of each intersection road is that the traffic signal lamp firstly goes straight and then turns left;
setting a primary buffer area, a secondary buffer area, a buffer area signal lamp, a traffic signal lamp and a camera with a virtual coil on each intersection road; in fig. 1, 1 denotes a primary buffer area, 2 denotes a secondary buffer area, 3 denotes a buffer area signal lamp, 4 denotes a traffic signal lamp, and 5 denotes a camera with a virtual coil; wherein,
and taking the area within d meters from the stop line on the left-turn lane and the straight lane in the road of the intersection as a primary buffer area, wherein the left-turn lane and the straight lane in the primary buffer area are not provided with fixed driving directions.
In the first embodiment, the areas within d meters from the stop line on a single lane in the intersection road are all required to accommodate three vehicles.
The area except the first-level buffer area on the left-turn lane and the straight lane in the road of the intersection is used as a second-level buffer area, namely, the second-level buffer area is arranged behind the first-level buffer area along the direction towards the intersection, and the vehicle firstly passes through the second-level buffer area, then passes through the first-level buffer area and finally passes through the intersection.
The buffer zone signal lamp is used for indicating vehicles on a straight lane or a left-turn lane in a secondary buffer zone in the road of the intersection to run into the primary buffer zone and allowing the vehicles on the straight lane or the left-turn lane to run into any lane in the primary buffer zone.
The traffic signal lamp is used for indicating all vehicles in the first-level buffer zone in the road of the intersection to go straight or turn left to pass through the intersection according to the direction indicated by the traffic signal lamp.
In the first embodiment, the first-level buffer area in the intersection road is further divided into an area a and an area B; the size of the area A occupies 2/3 of the size of the primary buffer, namely two vehicles can be accommodated on a single lane in the area A, and the size of the area B occupies 1/3 of the size of the primary buffer, namely one vehicle can be accommodated on a single lane in the area B; the area A is an 2/3 area within d meters from the stop line on the left-turn lane and the straight lane in the primary buffer area; the region B is a region except the region I on a left-turn lane and a straight lane in the primary buffer zone; and the area a is close to the stop line and the area B is close to the secondary buffer. When a vehicle on a certain lane in the secondary buffer zone enters the primary buffer zone, the area A is required to be stopped fully, and then the area B is required to be stopped, so that the situation that a straight lane or a left-turn lane in the secondary buffer zone cannot enter the primary buffer zone due to the fact that a certain single lane of the primary buffer zone is stopped fully is avoided.
In the first embodiment, the traffic signal lamp and the buffer area signal lamp are arranged on one signal lamp, the signal lamp comprises four displays, and actually three displays are respectively used for indicating left turn, straight running and right turn on a road, namely indicating of the traffic signal lamp, and the other display is used for indicating left turn and straight running of the buffer area signal lamp, namely indicating of the buffer area signal lamp.
The indication rules of the buffer zone signal lamps of each intersection road are as follows:
when the traffic signal lamps of the road at the intersection display that both straight-going and left-turning are not available, the signal lamps of the buffer area indicate straight-going, namely, the vehicles on the straight-going lane in the secondary buffer area are indicated to enter the left-turning lane and the straight-going lane in the primary buffer area;
when the traffic signal lamps of the road at the intersection display that the remaining time of straight running is 10 seconds, the buffer zone signal lamps indicate left-turn running and straight running is forbidden, namely, the vehicles on the left-turn lane in the secondary buffer zone are indicated to run into the left-turn lane and the straight lane in the primary buffer zone, and meanwhile, the vehicles on the straight lane in the secondary buffer zone are forbidden to run into the left-turn lane and the straight lane in the primary buffer zone;
when the traffic signal lamps of the road at the intersection display that the left turn time is 6 seconds, the buffer area signal lamps indicate that the left turn is forbidden and the vehicle passes straight, namely, the vehicle on the straight lane in the secondary buffer area is indicated to enter the left turn lane and the straight lane in the primary buffer area, and meanwhile, the vehicle on the left turn lane in the secondary buffer area is forbidden to enter the left turn lane and the straight lane in the primary buffer area;
by analogy, the signal lamp of the buffer area of each intersection road carries out circular indication according to the mode;
and vehicles running into the first-level buffer zone all run through the intersection according to the current indication direction of the traffic signal lamps.
In the first embodiment, taking the indication of the buffer signals of the north-south road as an example, the following description is made: considering that the straight vehicles on the east-west road immediately start to pass after the left-turn vehicles on the south-north road pass, so that the preparation time for the straight vehicles on the south-north road to enter the primary buffer area is relatively long, therefore, the straight vehicles on the south-north road only start to enter the primary buffer area in the last 6 seconds of the left-turn traffic, namely, the left-turn vehicles on the south-north road are only prohibited to enter the primary buffer area in the last 6 seconds of the left-turn traffic; and vehicles in the first-level buffer zone can pass through in 6 seconds in general.
The camera with the virtual coil is used for monitoring the total number of vehicles on a straight lane and the total number of vehicles on a left-turn lane in the road of the intersection, and the camera with the virtual coil is not only used for monitoring the total number of vehicles on each lane in the road of the intersection, but also used for being linked with traffic lights, so that the passing time of each lane in each road of the intersection is allocated in real time.
As shown in fig. 1, four cameras with virtual coils are arranged in the north-south direction and the east-west direction to monitor the traffic flow of vehicles coming and going, so as to regulate and control the traffic time of a traffic signal lamp indicating the east-west direction and the south-north direction in real time, and further regulate the straight traffic time and the left-turn traffic time in a certain congestion direction; the specific mode is as follows:
the total number of vehicles in the monitored east-west direction is NumThings (Earthwest)And the total number of vehicles in the north-south direction is NumNorth and south(ii) a The total number Num of vehicles in the east-west directionThings (Earthwest)The total number of vehicles on a straight lane and a left-turn lane in a secondary buffer zone on an intersection road in the east-west direction is determined; the total number Num of vehicles in the north-south directionNorth and southThe total number of vehicles on a straight lane and a left-turn lane in a secondary buffer area on a road at the intersection in the south-north direction;
as shown in fig. 2, in the first embodiment, the total time T of completing one passage in the north-south direction and the east-west direction at the intersection is taken as 180s as an example; wherein, the total time of passing in the north-south direction is TNorth and south(ii) a The total time of passing in the east-west direction is TThings (Earthwest)(ii) a I.e. T ═ TNorth and south+TThings (Earthwest)；
When in useWhen the traffic is in the traffic jam state, namely the north-south direction is the congestion direction, the total time of the traffic in the north-south direction isThe total time of passing in the east-west direction is
When in useWhen the traffic is in the traffic jam direction, namely the east-west direction is the traffic jam direction, the total time of the traffic in the north-south direction isThe total time of passing in the east-west direction is
When in useOrWhen the time is long, namely the east-west direction and the south-north direction are relatively uniform, the total time of passing in the south-north direction isThe total time of passing in the east-west direction is
As shown in fig. 3, in the first embodiment, the north-south direction is taken as the congestion direction, that is, the total time of passing in the north-south direction is taken asThe total time of passing in the east-west direction isFor example; wherein,
total straight-ahead time in north-south direction isTotal time of left turn in north-south direction isAnd is
The total number of left-turn vehicles in the north-south direction, namely the total number of vehicles on the left-turn lanes in the secondary buffer zone on the intersection road in the north-south direction isThe total number of straight-going vehicles in the north-south direction, i.e. the total number of vehicles on the straight-going lanes in the secondary buffer zone on the intersection road in the north-south direction is
When in useThen the total straight-going time in the north-south direction isTotal time of left turn in north-south direction
When in useThen the total straight-going time in the north-south direction isTotal time of left turn in north-south direction
When in useOrThe total time of straight traveling in the north-south direction isTotal time of left turn in north-south direction
The total straight-ahead time in the east-west direction isThe total time of left turn in east-west direction isAnd is
The total number Num of vehicles in the east-west directionThings (Earthwest)The method comprises the following steps: the total number of left-turn vehicles in the east-west direction, i.e. the total number of vehicles on the left-turn lane in the secondary buffer zone on the crossing road in the east-west direction isThe total number of straight-going vehicles in the east-west direction, i.e. the total number of vehicles on the straight-going lane in the secondary buffer zone on the road at the crossing in the east-west direction isAnd is
When in useThen the total straight-going time in the east-west direction isTotal time of left turn in east-west direction
When in useThen the total straight-going time in the east-west direction isTotal time of left turn in east-west direction
When in useOrThe total straight-ahead time in the east-west direction isTotal time of left turn in east-west direction
The efficiency of the regulation and control mode of the first embodiment is verified and explained as follows:
time layer: according to the rule of time regulation, when the number of vehicles in the east-west direction is less than half of the number of vehicles in the south-north direction, and the number of left-turn vehicles in the north-south direction is less than half of the number of vehicles in the straight-ahead direction, the regulation and control mode in the situation can increase the passing time of the straight-ahead lane in the congestion direction from the original 45s to 80s, and the time is increased by 35 s. Similarly, when the number of straight-ahead vehicles in the north-south direction is less than half of the number of left-turn vehicles, the passing time of the left-turn lane can be increased by 45 s.
Space level: the first-level buffer area occupies the space of three vehicles respectively in a straight lane and a left-turn lane, which is equivalent to that the space of three vehicles in the left-turn lane with less vehicles is fully utilized on the existing lane design, and the length of the vehicle body is 5 meters in the general practical condition, the arrangement of the primary buffer area is adopted, which is equivalent to increasing the accessible lanes by 15 meters, and in general, 6 vehicles in the first-level buffer area need 6 seconds after passing, and considering that a driver is not likely to start the vehicles to pass at the same time when the green light is on, delay occurs, the vehicles in the first-level buffer zone are completely passed every 10 seconds on average, meanwhile, the vehicles in the second-level buffer zone sequentially and smoothly enter the first-level buffer zone within the 10 seconds, which is equivalent to that 3 vehicles can be passed by utilizing the buffer zone every 10 seconds on average, that is, when using a primary buffer, more than 3 vehicles will be traveling every 10 seconds relative to the non-primary buffer.
Analyzing the comprehensive efficiency of the traffic:
for the phenomenon of the congestion of the straight lane in the north-south direction, the following verification can be made from the three conditions
The first condition is that vehicles in the east-west direction and the south-north direction are not much different, vehicles in the south-north direction and vehicles in the left-turn direction are also not much different, the passing time is equally divided, which is equivalent to the time of not adding time to allocate the existing signal lamp, the passing efficiency of only adding a first-level buffer area is realized, the passing of the vehicles in the first-level buffer area is finished according to the average time of every 10 seconds, meanwhile, the vehicles in a second-level buffer area smoothly and sequentially enter the first-level buffer area within the 10 seconds, which is equivalent to the fact that 3 vehicles can be passed by utilizing the buffer area every 10 seconds, and the traffic flow increased by the straight: that is, only adding the buffer area, compared with the existing time allocation method, the method can more 13 vehicles in consideration of the real delay problem.
Case two: the passing time in the east-west direction and the south-north direction is equally divided, only the left turning time in the south-north direction is sacrificed, and at the moment, when the green light of the straight lane is turned on, the passing is finished, and more 18 vehicles can pass.
Case three: the total number of the vehicles in the east-west direction is less than half of the total number of the vehicles in the south-north direction, the straight-going vehicles in the south-north direction and the left-turning vehicles in the south-north direction have little difference, the east-west passing time is only sacrificed, and the traffic flow increased by the straight-going vehicles at the moment is as follows: namely, when the green light of the straight lane is lighted up and ended, more 18 vehicles can pass.
Case four: the total number of the vehicles in the east-west direction is less than half of the total number of the vehicles in the south-north direction, the left-turning vehicles in the south-north direction are less than half of the straight-going vehicles, and the traffic flow increased by straight-going is as follows: namely, when the green light of the straight lane is turned on and ends, 24 vehicles can pass through.
In conclusion, the invention is suitable for the traffic jam phenomenon in one direction of centralized traffic jam in the crossroads, and the buffer area signal lamps are arranged through the virtual coil technology, so that the time of the original traffic signal lamps and the original buffer area signal lamps is adjusted, the straight-going or left-turning indication is changed, the straight-going and left-turning vehicles enter the first-level buffer area, the passing efficiency of the crossroads is improved, the queuing waiting time of the vehicles is reduced, the traffic jam is reduced, and the safety and the traveling efficiency of urban traffic are improved.
The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A system for relieving intersection traffic jam, the intersection comprises a plurality of roads, each intersection road is provided with a plurality of lanes; the system is characterized in that a primary buffer area, a secondary buffer area, buffer area signal lamps and traffic signal lamps are arranged on each intersection road; wherein,
taking areas within d meters from stop lines on a plurality of lanes in the road of the intersection as primary buffer areas; all lanes in the primary buffer area are not provided with fixed driving directions;
taking the area except the primary buffer area in the road of the intersection as a secondary buffer area; the vehicle firstly passes through the secondary buffer zone, then passes through the primary buffer zone and finally passes through the intersection; the fixed driving direction of each lane in the secondary buffer area is respectively set, namely, a plurality of lanes in different directions are arranged in the secondary buffer area;
the buffer zone signal lamp is used for indicating the vehicles on a certain direction lane in the secondary buffer zone to run into the primary buffer zone and allowing the vehicles on the direction lane to run into any lane in the primary buffer zone;
the traffic signal lamp is used for indicating all vehicles in the primary buffer zone to run through the intersection according to the direction indicated by the traffic signal lamp.
2. The system for alleviating intersection traffic congestion of claim 1,
n lanes in different directions are arranged in the secondary buffer area; with AiDenotes direction, i ═ 1,2, … N; and the passing sequence of the N different directions is A1,A2,…ANThat is, the traffic signal lights indicate the passing sequence of the N different directions to be A1,A2,…AN；
The buffer area signal lamp indication rule is as follows:
when the traffic signal lamp indicates the direction A1,A2,…ANWhen the traffic lights are all impassable, at the moment, the signal lights in the buffer area indicate the direction A1Passing, i.e. indicating direction A in the secondary buffer1The vehicle on the lane enters a primary buffer zone;
when the traffic signal lamp indicates the direction AiThe passing residual time of tiSecond, at this point, the buffer signal light indicates direction Ai+1Passing, i.e. indicating direction A in the secondary bufferi+1The vehicle on the lane enters a primary buffer zone;
wherein i is 1,2, … N; and if i is equal to N, indicating the direction A at the traffic signal lampNThe passing residual time of tNAt second, the signal lamp in the buffer area indicates the direction A1Passing, i.e. indicating direction A in the secondary buffer1The vehicle on the lane enters a primary buffer zone;
by analogy, the signal lamps in the buffer area carry out circular indication according to the mode;
and vehicles running into the first-level buffer zone all run through the intersection according to the current indication direction of the traffic signal lamps.
3. The system for alleviating intersection traffic congestion of claim 2, further comprising a camera positioned on the road for monitoring traffic flow on the road;
the traffic signal lamp indicates the direction AiTotal time of passage TiAccording to the direction A in the secondary bufferiThe ratio of the total traffic flow of the lanes to the total traffic flow of the whole intersection, and the direction A according to the secondary buffer areaiThe proportion of the total traffic flow of the road at the intersection where the lane is located is adjusted.
4. A system for relieving intersection traffic jam is characterized in that the intersections are crossroads, and each intersection road is provided with a left-turn lane, a straight lane and a right-turn lane; the indication rule of the traffic signal lamp of each intersection road is that the traffic signal lamp firstly goes straight and then turns left;
each intersection road is provided with a primary buffer area, a secondary buffer area, a buffer area signal lamp and a traffic signal lamp which correspond to each intersection road; wherein,
taking the area within d meters from the stop line on the left-turn lane and the straight lane in the road of the intersection as a primary buffer area, wherein the left-turn lane and the straight lane in the primary buffer area are not provided with fixed driving directions;
taking the areas except the primary buffer area on the left-turn lane and the straight lane in the road of the intersection as secondary buffer areas; the vehicle firstly passes through the secondary buffer zone, then passes through the primary buffer zone and finally passes through the intersection;
the buffer zone signal lamp is used for indicating the vehicles on a certain direction lane in the secondary buffer zone to run into the primary buffer zone and allowing the vehicles on the direction lane to run into any lane in the primary buffer zone;
the traffic signal lamp is used for indicating all vehicles in the primary buffer zone to run through the intersection according to the direction indicated by the traffic signal lamp.
5. The system for relieving traffic congestion at intersections according to claim 4, wherein the indication rule of the signal light of the buffer area of each intersection road is as follows:
when the traffic signal lamps of the road at the intersection display that both straight-going and left-turning are not available, the signal lamps of the buffer area indicate straight-going, namely, the vehicles on the straight-going lane in the secondary buffer area are indicated to enter the left-turning lane and the straight-going lane in the primary buffer area;
when the traffic signal lamps of the road at the intersection display that the remaining time of straight running is m seconds, the buffer zone signal lamps indicate left-turn running and straight running is forbidden, namely, the vehicles on the left-turn lane in the secondary buffer zone are indicated to run into the left-turn lane and the straight lane in the primary buffer zone, and meanwhile, the vehicles on the straight lane in the secondary buffer zone are forbidden to run into the left-turn lane and the straight lane in the primary buffer zone;
when the traffic signal lamps of the road at the intersection display that the left turn time is n seconds, the buffer area signal lamps indicate that the left turn is forbidden and the vehicle passes straight, namely, the vehicle on the straight lane in the secondary buffer area is indicated to enter the left turn lane and the straight lane in the primary buffer area, and meanwhile, the vehicle on the left turn lane in the secondary buffer area is forbidden to enter the left turn lane and the straight lane in the primary buffer area;
by analogy, the signal lamp of the buffer area of each intersection road carries out circular indication according to the mode;
and vehicles running into the first-level buffer zone all run through the intersection according to the current indication direction of the traffic signal lamps.
6. The system for alleviating intersection traffic congestion of claim 4, wherein the intersection comprises north-south roads and east-west roads; the east-west direction includes east-to-west and west-to-east directions; the north-south directions include south-to-north and north-to-south directions;
the method comprises the steps that a camera with a virtual coil is arranged on each road and used for monitoring traffic flow on each road, and the total number of vehicles in the east-west direction is monitored to be NumThings (Earthwest)And the total number of vehicles in the north-south direction is NumNorth and south；
The total number Num of vehicles in the east-west directionThings (Earthwest)The total number of vehicles on a straight lane and a left-turn lane in a secondary buffer zone on an intersection road in the east-west direction is determined;
the total number Num of vehicles in the north-south directionNorth and southThe total number of vehicles on a straight lane and a left-turn lane in a secondary buffer area on a road at the intersection in the south-north direction;
setting: the total time for completing one-time passage in the north-south direction and the east-west direction of the crossroad is T, wherein the total time for the passage in the north-south direction is TNorth and south(ii) a The total time of passing in the east-west direction is TThings (Earthwest)(ii) a I.e. T ═ TNorth and south+TThings (Earthwest)；
When in useThen the total time of passing in the north-south direction isThe total time of passing in the east-west direction is
When in useThen the total time of passing in the north-south direction isThe total time of passing in the east-west direction is
When in useOrThen the total time of passing in the north-south direction isThe total time of passing in the east-west direction is
7. The system for alleviating intersection traffic congestion of claim 5,
total time T of passing in north and south directionsNorth and southThe method comprises the following steps: total straight-ahead time in north-south direction isTotal time of left turn in north-south direction isAnd is
The total number Num of vehicles in the north-south directionNorth and southThe method comprises the following steps: the total number of left-turn vehicles in the north-south direction, namely the total number of vehicles on the left-turn lanes in the secondary buffer zone on the intersection road in the north-south direction isTotal number of straight-going vehicles in north-south direction, i.e. crossing road in north-south directionThe total number of vehicles on the straight lane in the secondary buffer area isAnd is
When in useThen the total straight-going time in the north-south direction isTotal time of left turn in north-south direction
When in useThen the total straight-going time in the north-south direction isTotal time of left turn in north-south direction
When in useOrThe total time of straight traveling in the north-south direction isTotal time of left turn in north-south direction
Total time T of passing in the east-west directionThings (Earthwest)The method comprises the following steps: the total straight-ahead time in the east-west direction isThe total time of left turn in east-west direction isAnd is
The total number Num of vehicles in the east-west directionThings (Earthwest)The method comprises the following steps: the total number of left-turn vehicles in the east-west direction, i.e. the total number of vehicles on the left-turn lane in the secondary buffer zone on the crossing road in the east-west direction isThe total number of straight-going vehicles in the east-west direction, i.e. the total number of vehicles on the straight-going lane in the secondary buffer zone on the road at the crossing in the east-west direction isAnd is
When in useThen the total straight-going time in the east-west direction isTotal time of left turn in east-west direction
When in useThen the total straight-going time in the east-west direction isTotal time of left turn in east-west direction
When in useOrThe total straight-ahead time in the east-west direction isTotal time of left turn in east-west direction
8. The system for relieving intersection traffic congestion of claim 5, wherein m is 10-15; n is 6 to 10.
9. The system for alleviating intersection traffic congestion as recited in claim 1 or 4, wherein an area within d meters from the stop line on a single lane in an intersection road is required to be an area that accommodates three vehicles.
10. The system for alleviating traffic congestion at intersections according to claim 1 or 4, wherein the primary buffer area in the intersection road is divided into area A and area B; the area A is close to the stop line, and the area B is close to the secondary buffer area; the size of a single lane in the area B is the size of accommodating one vehicle; when a vehicle on a certain lane in the secondary buffer zone enters the primary buffer zone, the area A is required to be stopped fully, and then the area B is required to be stopped.
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| CN111341122A (en) * | 2020-02-17 | 2020-06-26 | 昆明理工大学 | Self-adaptive algorithm for controlling time length of intersection signal lamp |
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| CN111341122A (en) * | 2020-02-17 | 2020-06-26 | 昆明理工大学 | Self-adaptive algorithm for controlling time length of intersection signal lamp |
| CN111341122B (en) * | 2020-02-17 | 2021-12-21 | 昆明理工大学 | Self-adaptive algorithm for controlling time length of intersection signal lamp |
| CN111815969A (en) * | 2020-06-18 | 2020-10-23 | 广东振业优控科技股份有限公司 | Method for setting free turning area based on symmetric phase unbalanced traffic flow intersection |
| CN111815969B (en) * | 2020-06-18 | 2022-03-15 | 广东振业优控科技股份有限公司 | Method for setting free turning area based on symmetric phase unbalanced traffic flow intersection |
| CN113112797A (en) * | 2021-04-09 | 2021-07-13 | 交通运输部公路科学研究所 | Signal lamp intersection scheduling method and system based on vehicle-road cooperation technology |
| CN113112797B (en) * | 2021-04-09 | 2022-01-07 | 交通运输部公路科学研究所 | Signal lamp intersection scheduling method and system based on vehicle-road cooperation technology |
| CN113611140A (en) * | 2021-08-11 | 2021-11-05 | 大连交通大学 | Intersection partition synchronous passing control system and method |
| CN114399914A (en) * | 2022-01-20 | 2022-04-26 | 交通运输部公路科学研究所 | Lane, signal lamp and vehicle combined dispatching method and system with vehicle-road cooperation |
| CN115035730A (en) * | 2022-04-13 | 2022-09-09 | 詹华 | Signal lamp control method for cross road section of upper bridge |
| CN117116063A (en) * | 2023-10-23 | 2023-11-24 | 深圳英飞拓科技股份有限公司 | Method for detecting and adjusting traffic jam |
| CN117116063B (en) * | 2023-10-23 | 2024-02-13 | 深圳英飞拓科技股份有限公司 | Method for detecting and adjusting traffic jam |
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