CN115637616A - Intersection left-turning traffic flow organization design method for complex road conditions - Google Patents

Abstract

The invention belongs to the technical field of crossroad design, and particularly relates to a driving scheme design for left-turning vehicles at crossroads with special road conditions for relieving traffic congestion. The left-turning vehicle is designed to enter the intersection and run along two vertical crosswalks, so that the number of vehicles staying at the intersection is reduced, the staying time of the vehicles is shortened, the phenomenon that the vehicles are prevented from driving in opposite directions is avoided, and the straight-running traffic of subsequent following vehicles is improved; by utilizing the special area of the crossroad, the positions to be parked with the inclination angle of 30 degrees are arranged in the special area, and are arranged in a fault-tolerant manner, so that the area in the crossroad can be effectively utilized to the maximum extent to give way for straight following after a left-turning vehicle; waiting for vehicles at the center position of the east-west direction of the crossroad, using the width of two opposite lanes to take the center area as a specific area, and carrying out fault-tolerant arrangement of the waiting vehicles and the east-west direction according to 30 degrees of inclination angles. The invention can effectively improve the hidden trouble of traffic jam caused by urban population and traffic vehicles, and can improve the current situation of traffic jam at a special crossroad to a certain extent.

Description

Intersection left-turning traffic flow organization design method for complex road conditions

Technical Field

The invention belongs to the technical field of crossroad design, and particularly relates to a driving scheme design for left-turning vehicles at crossroads with special road conditions for relieving traffic congestion.

Background

At present, with the continuous development of market economy, the material culture living standard of people is continuously improved, and the people have a trend of riding and going out. The traffic jam problem comes along with the urban traffic jam problem, which is an important problem to be solved urgently in urban development. The congestion is mainly reflected in the passing of vehicles at various crossroads. In order to solve the congestion problem, various advanced intelligent traffic technologies emerge endlessly, various crossroad road design schemes are optimized continuously, and various traffic light setting modes and time are more intelligent. In the years, the population of cities is continuously increased, the number of private cars on the road is increased year by year, and under the condition that the width of an urban road is enlarged and the cost is high, the traffic flow at a crossroad is improved and the congestion condition at the crossroad is improved by adjusting the driving scheme and the waiting mode of left-turn cars on the premise of the existing lane width, the existing traffic light setting scheme and the existing time length.

On the basis, a left-turning traffic flow organization design method for the crossroads with complex road conditions is designed.

Disclosure of Invention

The invention provides a left-turn vehicle passing route and a waiting vehicle position and mode design of a crossroad with complex road conditions, which can improve the vehicle traffic to the maximum extent, improve the traffic jam problem, solve the problem that vehicles at the crossroad are easy to jam due to unscientific design of the crossroad and the problem that the vehicles at the crossroad are easy to jam due to the historical reasons of urban development under the conditions of not changing the lane width, not replacing traffic management equipment and not modifying the traffic light setting and time length.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a method for organizing and designing left-turning traffic flow at a crossroad with complex road conditions comprises the following steps:

the left-turning vehicle is designed to enter the intersection and run along two vertical crosswalks, so that the number of vehicles meeting opposite coming vehicles is reduced, the number of vehicles staying at the intersection is reduced, the vehicle staying time is shortened, the phenomenon that the opposite coming vehicles are obstructed is avoided, and the subsequent straight-running traffic volume of the following vehicles is improved;

by utilizing the special area of the crossroad, the positions to be parked with the inclination angle of 30 degrees are arranged in the special area, and are arranged in a fault-tolerant manner, so that the area in the crossroad can be effectively utilized to the maximum extent to give way for straight following after a left-turn car, and 3 parking spaces capable of meeting the condition are arranged according to the size of the crossroad;

waiting for vehicles at the center position of the east-west direction of the crossroad, using the width of two opposite lanes to take the center area as a specific area, and fault-tolerant arranging the vehicles waiting for vehicles and the east-west direction according to 30 degrees of inclination angle to give out a passing distance of 1m for following vehicles of a travelling crane and give out a passing distance of 1m for opposite vehicles;

the special area is a 2m distance between a crosswalk and a non-motor vehicle lane in the same direction, and the distance is set as the special area;

the central area is: the boundary between the east-west lane and the west-east lane is a central line, and the area is 2m in total, namely 1m from the east-west lane and 1m from the west-east lane.

Further, the method for organizing and designing the left-turning traffic flow of the crossroad with the complex road conditions comprises the following steps:

s1, when the traffic flow direction is east-west direction, pedestrians on the left and right sides of the traffic flow pass through the crosswalk. If a left-turn vehicle runs into the intersection, an opposite coming vehicle also just runs into the road entrance, or the opposite coming vehicle is a right-turn vehicle, the collision with the opposite coming vehicle is staggered to cause congestion, the opposite coming vehicle can directly run away from the intersection according to the actual traffic condition of the intersection, or the opposite coming vehicle can wait for the vehicle in a specific area due to the blocking of pedestrians on a pedestrian crosswalk; the number of vehicles waiting for the vehicle is at most 3, the effective area in the intersection is fully utilized, 3 left-turning vehicles are driven away from the straight-going channel, and the straight-going vehicle passing condition in the road is effectively improved;

s2, when the traffic flow direction is east-west direction, if left-turning vehicles enter the intersection, the opposite vehicles reach half of the intersection, and at the moment, the left-turning vehicles are sequentially arranged at the center position according to the fault-tolerant position to wait for left turning, so that the situation that the tail of the left-turning vehicle obstructs the straight-going vehicles in the same direction or the head of the left-turning vehicle obstructs the straight-going vehicles in the opposite direction can be effectively avoided; according to the actual passing condition of the intersection, the left-turning vehicles waiting in the similar fault-tolerant arrangement are 3 vehicles at most.

S3, for vehicles turning left from south to north, according to the actual distance of the intersection, the right side of the intersection is provided with a pedestrian overpass, so that the traffic jam is small and the vehicles can naturally pass;

s4, for the north south left-turning vehicle, because the opposite direction has the central garden, the distance from the left-turning vehicle to the opposite lane is long, and the avoidance of the opposite vehicle is impossible, a special route does not need to be set, and the vehicle can be driven according to a normal route; if people flow in the left pedestrian passageway or fewer vehicles go straight ahead, the vehicles can directly pass through the left pedestrian passageway; if the vehicle is blocked by pedestrian flow of a pedestrian passageway on the left side or a straight-ahead vehicle, the waiting area is wider, and the fault tolerance can be realized.

Further, in step S1, when the traffic flow direction is from east to west, pedestrians on the crossroads pass through both sides of the road, if a left-turn vehicle travels into the intersection, it is found that there is a rare vehicle coming in the opposite direction, and the vehicle should travel according to the route 1, and if the vehicle travels in front of the lane 11 and the lane 12, the vehicle should travel away from the crossroads from the lane 11 and the lane 12 as soon as possible on the premise of ensuring that the pedestrians and the vehicles turning right preferentially travel.

Further, in the step S1, the oncoming vehicle has just run into the road junction, or the oncoming vehicle is a right-turn vehicle, the left-turn vehicle should follow the opportunity to run according to the route 2, and the left-turn vehicle has already run into the area between the sidewalk and the motorway of the oncoming vehicle before meeting the oncoming vehicle, so as to avoid that the left-turn vehicle cannot run out of the road junction and blocks the running of the oncoming straight-run vehicle, and blocks the occurrence of the phenomenon of the subsequent following straight-run vehicle of the vehicle; when the vehicle is traveling in front of the lanes 11 and 12, the vehicle should leave the intersection from the lanes 11 and 12 as soon as possible while ensuring that pedestrians and right-turning vehicles travel preferentially.

Further, in the step S1, the oncoming vehicle has just traveled to the intersection, or the oncoming vehicle is a right-turn vehicle, the left-turn vehicle should follow the route 2 with an opportunity, and the left-turn vehicle has traveled to an area between the sidewalk and the motorway of the oncoming vehicle before meeting the oncoming vehicle, so that the phenomenon that the left-turn vehicle cannot travel away from the intersection and blocks the oncoming straight vehicle can be avoided; if the flow of the pedestrians and the right-turning vehicles is dense and no driving opportunity exists, parking waiting is carried out according to the waiting vehicle scheme 1; according to the distance characteristics of the crossroad, vehicles need to wait in the area A, the included angle between the positions of the waiting vehicles and the east-west direction is 30 degrees, and the following vehicles can be sequentially arranged according to the positions, so that the waiting vehicles are prevented from being perpendicular to the straight-going vehicles, and the situation that the tail of the left-turning waiting vehicle blocks the straight-going vehicles is relieved as much as possible; the fault-tolerant sequencing method ensures that as many left-turning vehicles as possible have proper waiting positions in the intersection area, on one hand, the left-turning vehicles give way for the following straight-going vehicles, and on the other hand, the left-turning vehicles avoid blocking the passing of the opposite straight-going vehicles;

further, in the step S2, when the traffic flow direction is from east to west, if the left-turning vehicle belongs to a follow-up running vehicle, the vehicle enters the intersection and intends to turn left, the opposite vehicle is running along the intersection at the moment, the left-turning vehicle does not have a chance to turn left, and the vehicle should move forward along the vehicle and run along the running route 1, if the vehicle is the first left-turning vehicle, the vehicle enters the intersection at the position of the 16m central point, the waiting vehicle is inclined by taking the road central line as the vehicle bisector, the waiting position and the road central line have an inclination angle of 30 °, the vehicle should wait in the area B, the waiting scheme is 2, the following left-turning vehicles are sequentially subjected to fault-tolerant arrangement, and the maximum number of 3 left-turning vehicles are subjected to fault-tolerant arrangement according to the road width.

Further, in the step S2, when the traffic flow direction is from west to east, pedestrians on the crosswalk pass through both sides of north and south. If a left-turn vehicle is driven into the intersection, the oncoming vehicle is found to be rare, and the vehicle should be driven according to the route 3, if the vehicle is driven to the front of the lanes 17 and 18, the vehicle should be driven away from the intersection as soon as possible on the premise of ensuring that pedestrians and oncoming right-turn vehicles preferentially drive, and the subsequent vehicles also have enough distance to change lanes to the right.

Further, in the step S2, when the traffic flow direction is from west to east, pedestrians on the crosswalks pass through both sides of the south and north, the oncoming vehicle has just traveled to the entrance, or the oncoming vehicle is a right-turn vehicle, the left-turn vehicle should follow the route 4 with a chance to travel, and the left-turn vehicle has traveled into the area between the sidewalk and the motorway of the oncoming vehicle before meeting the oncoming vehicle, so that the phenomenon that the left-turn vehicle cannot travel away from the intersection and blocks the traveling of the oncoming vehicle, and blocks the traveling of the subsequent following straight-run vehicle of the left-turn vehicle occurs; when the vehicle is running in front of the lanes 17 and 18, the vehicle should leave the intersection from the lanes 17 and 18 as soon as possible and the following vehicle should have enough distance to change lanes to the right side on the premise of ensuring that the pedestrian and the right-turning vehicle preferentially run.

Further, in the step S2, when the traffic flow direction is from west to east, pedestrians on the crosswalk pass through the both north and south directions; if a left-turning vehicle drives into the intersection, an opposite-turning vehicle also drives into the intersection immediately, or the opposite-turning vehicle is a right-turning vehicle, the left-turning vehicle follows the idea that the opposite-turning vehicle has the opportunity to drive away from the intersection in the fastest way, the intersection is not detained as much as possible to block the vehicle following the straight line, the vehicle is driven according to a route 4, and if the flow of pedestrians and the right-turning vehicle is dense and the vehicle has no driving opportunity, the vehicle is stopped and waits according to a waiting scheme 3; according to the distance characteristics of the crossroad, vehicles need to wait in the area C, the included angle between the positions of the vehicles waiting for the vehicles and the east-west direction is 30 degrees, and the following vehicles can be arranged according to the positions in a fault-tolerant manner, so that the positions of the vehicles waiting for the vehicles to be perpendicular to the straight-going vehicles are avoided, and the situation that the tail parts of the left-turning waiting vehicles block the straight-going vehicles is relieved as much as possible; the fault-tolerant sequencing method has the advantages that as many left-turning vehicles as possible have proper waiting positions in the intersection area, on one hand, the left-turning vehicles give way for the following straight-going vehicles, and on the other hand, the right-turning vehicles are prevented from blocking the straight-going vehicles;

further, in the step S2, when the traffic flow direction is from west to east, if the left-turning vehicle belongs to a follow-up running vehicle, the vehicle is about to turn left when entering the intersection, the oncoming vehicle is following the running vehicle at this time, and the left-turning vehicle does not have a chance to turn left, and should move ahead with the vehicle at this time, and run along the running route 3, if the vehicle is the first left-turning vehicle, the vehicle enters the intersection at the position of the center point 16m, and the waiting vehicle is inclined with the road center line as the vehicle bisector, the waiting position and the road center line inclination angle are 30 degrees, the vehicle should wait in the area D, the waiting plan is 4, the following left-turning vehicles are sequentially subjected to fault-tolerant arrangement, and the 3 left-turning vehicles are subjected to fault-tolerant arrangement at most according to the road width.

Further, in the step S4, when the traffic flow direction is from north to south, pedestrians pass through the crosswalk on the east side of the road; when the left-turn vehicle runs into the intersection, due to the fact that the vehicle faces the central garden, the vehicle can run for 10m after the left-turn vehicle turns left, and the vehicle should run according to the conventional route 5, and when the vehicle runs in front of the lanes 15 and 16, the vehicle can run away from the intersection from the lanes 15 and 16 under the condition that pedestrians and the vehicles running from south to north preferentially pass.

Further, in the step S4, when the traffic flow direction is from north to south, a pedestrian on the crosswalk passes through the east side of the road; the left-turning vehicles run into the intersection, due to the fact that a central garden is arranged in the opposite direction, the left-turning vehicles run for a distance of 10m after turning left, and should run according to a conventional route 5, if the left-turning vehicles run to the front of a lane 15 and a lane 16, pedestrians or straight vehicles from south to north continuously pass through the left-turning vehicles, and the left-turning vehicles can stop in an area E to wait when the left-turning vehicles cannot pass and need to stop, wherein the waiting area is wide, the waiting scheme is 5, the included angle between the vehicles and the east-west direction is 30 degrees, and the vehicles can follow the vehicle or be in fault-tolerant arrangement;

further, in step S4, when the traffic flow direction is from south to north, the pedestrian bridge is located on the west side of the left-turn vehicle, and the left-turn vehicle travels into the intersection, because of the central garden on the south side, the left-turn vehicle travels 10m away after turning left, and should travel according to the conventional route 6, and if the left-turn vehicle travels in front of the lane 13 and the lane 14, the vehicle travels from the lane 13 and the lane 14 away from the intersection under the condition of ensuring that the straight-driving vehicle travels preferentially from north to south.

Further, in step S4, when the traffic flow direction is from south to north, the pedestrian bridge is located on the west side of the left-turning vehicle; when a left-turning vehicle runs into the intersection, due to the fact that a central garden is arranged on the south side, the left-turning vehicle runs at a distance of 10m after turning left, and the left-turning vehicle is required to run according to a conventional route 6, if the left-turning vehicle runs in front of a lane 13 and a lane 14, the left-turning vehicle runs through the straight-going vehicle from the north to the south, the left-turning vehicle cannot run and needs to stop for waiting, the left-turning vehicle can stop for waiting in an area F, the waiting area is wide, the waiting scheme is 6, the included angle between the vehicle and the east-west direction is 30 degrees, and the left-turning vehicle can follow the vehicle or be arranged in a fault-tolerant mode.

The crossroad mainly comprises: the northeast corner of the crossroad is a residential area and a market; the southeast corner of the crossroad is a provincial hospital; the south-north bidirectional road and the central garden are arranged between the southeast corner and the southwest corner of the crossroad; the southwest corner of the crossroad is the primary school, and the south side of the primary school is the university; northwest corners of the crossroad are residential areas and markets; crosswalks are arranged on the east, south and north sides of the crossroad, and pedestrian overpasses are arranged on the west side. The basic situation of the traffic lane is as follows: the vehicle flow in the east-west direction of the crossroad is divided into two lanes in each direction; the road conditions of the south and north directions of the crossroad are complex, the traffic flow of the north side of the crossroad is divided into driving directions, four lanes are arranged in each direction, the incoming direction has two forms of coming vehicles of viaducts and coming vehicles of underground passages, the outgoing direction also has two forms of going vehicles of viaducts and going vehicles of underground passages, the two sides of a garden in the south center of the crossroad are respectively coming vehicles and going vehicles, two lanes are arranged in each direction, the distance between an east-west direction signal lamp and the crossroad is 2-32m, and the distance between the south-north direction signal lamp and the crossroad is 2-22m.

In conclusion, due to the adoption of the technical scheme, the beneficial technical effects of the invention are as follows:

on the premise of not changing the original arrangement of roads, the hidden danger of traffic jam caused by continuously increased urban population and traffic vehicles can be effectively improved, and the current situation of traffic jam at a special crossroad can be improved to a certain extent.

Drawings

FIG. 1 is a scheme showing the embodiment of route 1.

FIG. 2 is a scheme showing the embodiment of route 2.

Fig. 3 is a route diagram of the waiting plan 1.

Fig. 4 is a route diagram of the waiting plan 2.

FIG. 5 is a scheme showing a scheme of route 3.

FIG. 6 is a schematic diagram of route 4.

Fig. 7 is a route diagram of the waiting scenario 3.

Fig. 8 is a route diagram of the waiting scenario 4.

FIG. 9 is a scheme showing a specific embodiment of route 5.

Fig. 10 is a route diagram of the waiting scenario 5.

FIG. 11 is a scheme showing a scheme of route 6.

Fig. 12 is a route diagram of the waiting plan 6.

Fig. 13 is a road condition map of an intersection.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The specific contents of a left-turning vehicle driving route and a waiting position setting device for a crossroad with complex road conditions are as follows: when the traffic flow direction is from east to west, crosswalk pedestrians pass through the two sides of the south and the north. If a left-turn vehicle is driven into the intersection, the oncoming vehicle is rare, the vehicle should be driven according to the route 1 according to the thought that the vehicle should be driven away from the intersection in the fastest way, and if the vehicle is driven to the front of the lane 11 and the lane 12, the vehicle should be driven away from the intersection from the lane 11 and the lane 12 as soon as possible on the premise that the pedestrians and the vehicles turning right preferentially drive; the driving route is shown in fig. 2.

As shown in fig. 3, the oncoming vehicle has just run into the road junction, or the oncoming vehicle is a right-turn vehicle, the left-turn vehicle should follow the idea that there is an opportunity to drive away from the intersection in the fastest manner, and should run according to the route 2, and the left-turn vehicle has already driven into the area between the sidewalk and the motorway of the oncoming vehicle before meeting the oncoming vehicle, so as to avoid the phenomenon that the left-turn vehicle cannot drive away from the intersection and blocks the driving of the oncoming straight-run vehicle, and blocks the driving of the following oncoming straight-run vehicle; when the vehicle is traveling in front of the lanes 11 and 12, the vehicle should leave the intersection from the lanes 11 and 12 as soon as possible while ensuring that pedestrians and right-turning vehicles travel preferentially.

As shown in fig. 4, the oncoming vehicle has just run into the intersection, or the oncoming vehicle is a right-turn vehicle, the left-turn vehicle should follow the idea that there is an opportunity to drive away from the intersection in the fastest manner, and should run according to the route 2, and the left-turn vehicle has already driven into the area between the sidewalk and the motorway of the oncoming vehicle before meeting the oncoming vehicle, so that the phenomenon that the left-turn vehicle cannot drive away from the intersection and blocks the oncoming straight-run vehicle can be avoided; if the flow of the pedestrians and the right-turning vehicles is dense and no driving opportunity exists, parking waiting is carried out according to the waiting vehicle scheme 1; according to the distance characteristics of the crossroad, vehicles need to wait in the area A, the included angle between the positions of the vehicles waiting for the vehicles and the east-west direction is 30 degrees, and the vehicles can be arranged according to the positions in sequence, so that the positions of the vehicles waiting for the vehicles to be perpendicular to the straight vehicles are avoided, and the situation that the tail parts of the left-turning waiting vehicles block the straight vehicles to pass is relieved as much as possible; the fault-tolerant sequencing method ensures that as many left-turning vehicles as possible have proper waiting positions in the intersection area, on one hand, the left-turning vehicles give way for the following straight-going vehicles, and on the other hand, the left-turning vehicles avoid blocking the passing of the opposite straight-going vehicles.

The waiting vehicle position at the intersection is shown as 5, when the traffic flow direction is from east to west, if the left-turning vehicle belongs to the follow-up driving vehicle, the vehicle is about to turn left when entering the intersection, the opposite vehicle is following the driving vehicle at the moment, the left-turning vehicle has no chance to turn left, the vehicle should move ahead with the vehicle at the moment, the vehicle is driven according to the driving route 1, if the vehicle is the first left-turning vehicle, the vehicle enters the intersection at the position of a central point 16m, the waiting vehicle is inclined by taking the central line of the road as the bisector of the vehicle, the waiting vehicle position and the central line of the road have an inclination angle of 30, the vehicle should wait in an area B, the waiting vehicle scheme is 2, the following left-turning vehicles are sequentially subjected to fault-tolerant arrangement, and the 3 left-turning vehicles are subjected to fault-tolerant arrangement at most according to the width of the road. The purpose of arranging the waiting vehicles in the mode is to prevent the head of a left-turning vehicle from blocking the passing of the opposite straight-going vehicle and prevent the parking space of the left-turning vehicle from blocking the passing of the straight-going vehicle in the subsequent following vehicle as much as possible.

The driving route is as shown in fig. 6, when the traffic flow direction is from west to east, crosswalk pedestrians pass through both sides of south and north. If a left-turn vehicle enters the intersection, the oncoming vehicle is found to be rare, the vehicle should travel according to the route 3 following the thought that the vehicle should travel away from the intersection in the fastest way, and if the vehicle travels in front of the lanes 17 and 18, the vehicle should travel away from the intersection from the lanes 17 and 18 as soon as possible under the premise of ensuring that pedestrians and oncoming right-turn vehicles preferentially travel, and the subsequent vehicle also has enough distance to change lanes to the right.

The driving route is as shown in fig. 7, when the traffic flow direction is from west to east, crosswalk pedestrians pass through both sides of north and south. The opposite-direction coming vehicle is also just driven to enter the road junction, or the opposite-direction coming vehicle is a right-turn vehicle, the left-turn vehicle follows the thought that the opposite-direction coming vehicle is driven to leave the crossroad in the fastest way, and is driven according to the route 4, the left-turn vehicle is driven to the area between the sidewalk and the opposite-direction coming vehicle motor lane before meeting the opposite-direction coming vehicle, so that the phenomenon that the left-turn vehicle cannot drive to leave the crossroad and blocks the opposite-direction straight-driving vehicle from driving and blocks the subsequent following-direction following vehicle from driving can be avoided; when the vehicle is running in front of the lanes 17 and 18, the vehicle should leave the intersection from the lanes 17 and 18 as soon as possible and the following vehicle should have enough distance to change lanes to the right side on the premise of ensuring that the pedestrian and the right-turning vehicle preferentially run.

The parking waiting positions at the crossroad are shown in fig. 8, and when the traffic flow direction is from west to east, pedestrians on the crossroad pass through the crossroad in both the north and the south directions. If a left-turn vehicle runs into the intersection, an opposite-direction coming vehicle also runs into the road junction immediately, or the opposite-direction coming vehicle is a right-turn vehicle, the left-turn vehicle should follow the thought that the left-turn vehicle should run away from the intersection in the fastest way, the intersection is not detained as much as possible to obstruct the vehicles following the vehicle, the left-turn vehicle should run according to the route 4, and if the flow of pedestrians and the right-turn vehicle is dense, no driving opportunity exists, the vehicle should be parked and waited according to the waiting vehicle scheme 3; according to the distance characteristics of the crossroad, vehicles need to wait in the area C, the included angle between the positions of the vehicles waiting for the vehicles and the east-west direction is 30 degrees, and the vehicles can be sequentially arranged according to the positions in a fault-tolerant manner, so that the situation that the positions of the vehicles waiting for the vehicles to be vertical to straight-going vehicles is avoided, and the situation that the tail parts of the left-turning waiting vehicles block the straight-going vehicles to pass is relieved as much as possible; the fault-tolerant sequencing method ensures that as many left-turning vehicles as possible have proper waiting positions in the intersection area, on one hand, the left-turning vehicles give way for the following straight-going vehicles, and on the other hand, the left-turning vehicles avoid blocking the passing of the opposite straight-going vehicles.

The waiting vehicle position at the intersection is shown in fig. 9, when the traffic flow direction is from west to east, if the left-turning vehicle belongs to the follow-up running vehicle, the vehicle intends to turn left when entering the intersection, the opposite vehicle is running along the intersection at the moment, the left-turning vehicle does not have the opportunity to turn left, the vehicle should move ahead along the vehicle at the moment, if the vehicle is the first left-turning vehicle, the vehicle enters the intersection at the position of a central point 16m, the waiting vehicle is inclined by taking the road central line as the vehicle bisector, the waiting vehicle position and the road central line inclination angle are 30 degrees, the vehicle should wait for the vehicle in an area D, the waiting vehicle scheme is 4, the following left-turning vehicles are sequentially subjected to fault-tolerant arrangement, and the 3 left-turning vehicles can be subjected to fault-tolerant arrangement at most according to the road width. The purpose of arranging the waiting vehicles in the mode is to prevent the head of a left-turning vehicle from blocking the passing of the opposite straight-going vehicle and the tail of the left-turning vehicle from blocking the passing of the straight-going vehicle in the subsequent following vehicle as much as possible.

The driving route is as shown in fig. 10, when the traffic flow direction is from north to south, the east side of the road has crosswalk to pass by pedestrians. When the left-turn vehicle runs into the intersection, due to the fact that the vehicle faces the central garden, the vehicle can run for 10m after the left-turn vehicle turns left, and the vehicle should run according to the conventional route 5, and when the vehicle runs in front of the lanes 15 and 16, the vehicle can run away from the intersection from the lanes 15 and 16 under the condition that pedestrians and the vehicles running from south to north preferentially pass.

As shown in fig. 11, when the traffic direction is from north to south, there are crosswalk pedestrians on the east side of the road. When a left-turning vehicle runs into the intersection, due to the fact that a central garden is arranged in an opposite direction, the left-turning vehicle runs at a distance of 10m after turning left, and the left-turning vehicle is required to run according to a conventional route 5, if the left-turning vehicle runs in front of a lane 15 and a lane 16, pedestrians or straight-going vehicles from south to north continuously run, the left-turning vehicle cannot run and needs to stop for waiting, the left-turning vehicle can stop in an area E for waiting, the waiting area is wide, the waiting scheme is 5, the included angle between the vehicle and the east-west direction is 30 degrees, and the left-turning vehicle can follow the vehicle or be subjected to fault-tolerant arrangement.

The driving route is as shown in fig. 12, when the traffic flow direction is from south to north, the west side of the left-turning vehicle is the pedestrian bridge, the left-turning vehicle drives into the intersection, because of the central garden on the south side, the left-turning vehicle drives for 10m after turning left, and should drive according to the conventional route 6, if the left-turning vehicle drives to the front of the lane 13 and the lane 14, under the condition of ensuring the direct driving from north to south to preferentially pass, the left-turning vehicle drives from the lane 13 and the lane 14 away from the intersection.

The waiting position at the intersection is as shown in fig. 13, and when the traffic flow direction is from south to north, the pedestrian overpass is arranged on the west side of the left-turning vehicle. When a left-turning vehicle runs into the intersection, due to the fact that a central garden is arranged on the south side, the left-turning vehicle runs at a distance of 10m after turning left, and the left-turning vehicle is required to run according to a conventional route 6, if the left-turning vehicle runs in front of a lane 13 and a lane 14, the left-turning vehicle runs through the straight-going vehicle from the north to the south, the left-turning vehicle cannot run and needs to stop for waiting, the left-turning vehicle can stop for waiting in an area F, the waiting area is wide, the waiting scheme is 6, the included angle between the vehicle and the east-west direction is 30 degrees, and the left-turning vehicle can follow the vehicle or be arranged in a fault-tolerant mode. The above-described preferred embodiments of the invention are not intended to be limiting, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the invention are intended to be included within the scope of the invention.

Claims (10)

1. A method for organizing and designing left-turning traffic flow at a crossroad with complex road conditions is characterized by comprising the following steps: the left-turning vehicles enter the intersection and run along two vertical crosswalks, so that the number of vehicles meeting opposite vehicles is reduced, the vehicle detention time is shortened, the opposite-direction driving is prevented from being hindered, and the subsequent straight-running traffic of the following vehicles is improved;

by utilizing the special area of the crossroad, the positions to be parked with the inclination angle of 30 degrees are arranged in the special area, and are arranged in a fault-tolerant manner, the area in the crossroad can be effectively utilized to the maximum extent to give way for the straight following after the left-turning vehicle, and meanwhile, according to the size of the crossroad, 3 parking spaces to be parked which can meet the condition are arranged;

waiting for vehicles at the center position of the east-west direction of the crossroad, using the width of two opposite lanes to take the center area as a specific area, and fault-tolerant arranging the vehicles waiting for vehicles and the east-west direction according to 30 degrees of inclination angle to give out a passing distance of 1m for following vehicles of a travelling crane and give out a passing distance of 1m for opposite vehicles;

the special area is a 2m distance between a crosswalk and a non-motor vehicle lane in the same direction, and the distance is set as the special area;

the central area is: the boundary between the east-west lane and the west-east lane is a central line, and the area is 2m in total, namely 1m from the east-west lane and 1m from the west-east lane.

2. The design method for the left-turning traffic flow organization of the crossroad with complex road conditions as claimed in claim 1, characterized by comprising the following steps:

s1, when the traffic flow direction is east-west direction, pedestrians on the left and right sides of the traffic flow pass through the crosswalk. If a left-turn vehicle runs into the intersection, an opposite-direction coming vehicle also just runs into the intersection, or the opposite-direction coming vehicle is a right-turn vehicle, the collision with the opposite-direction coming vehicle is staggered to cause congestion, the opposite-direction coming vehicle can directly run away from the intersection according to the actual traffic condition of the intersection, or the opposite-direction coming vehicle can wait for the vehicle in a specific area due to the blocking of pedestrians on crosswalks; when the number of vehicles is at most 3, the effective area in the intersection is fully utilized, and 3 left-turning vehicles are driven away from the straight passage;

s2, when the traffic flow direction is east-west direction, if left-turning vehicles enter the intersection, the opposite-turning vehicles reach half of the intersection, the vehicles are sequentially arranged at the center position according to fault-tolerant positions to wait for left turning, and the maximum 3 left-turning vehicles waiting in a similar fault-tolerant arrangement are arranged according to the actual traffic condition of the intersection;

s3, for vehicles turning left from south to north, a pedestrian overpass is arranged on the right side of the intersection according to the actual distance of the intersection, so that the traffic jam is small and the vehicles can naturally pass;

s4, for the north south left-turning vehicle, because a central garden exists in the opposite direction, the distance from the left-turning vehicle to the opposite lane is long, and the avoidance of the opposite vehicle is impossible, a special route does not need to be set, and the vehicle can be driven according to a normal route; if people flow in the pedestrian passageway on the left side or the number of vehicles running straight in the opposite direction is less, direct passing is possible and can be directly passed; if the vehicle is blocked by pedestrian flow in a pedestrian passageway on the left side or a vehicle running straight ahead in the opposite direction, the waiting area is wider at the moment, and the fault tolerance can be realized.

3. The design method for the left-turning traffic flow organization of the crossroad with complex road conditions as claimed in claim 2, characterized in that: in step S1, when the traffic flow direction is from east to west, pedestrians on the crossroads pass through both sides of the north and south, if a left-turn vehicle travels into the intersection, it is found that there is a rare vehicle coming from the opposite direction, and the vehicle should travel according to the route 1, and if the vehicle travels in front of the lane 11 and the lane 12, the vehicle should travel away from the crossroads as soon as possible on the premise of ensuring that the pedestrians and the vehicles turning right preferentially travel.

4. The design method for the left-turning traffic flow organization of the crossroad with complex road conditions as claimed in claim 2, wherein: in the step S1, the oncoming vehicle has just traveled to the entrance, or the oncoming vehicle is a right-turn vehicle, and the left-turn vehicle should follow the route 2 with a chance, and the left-turn vehicle has traveled to the area between the sidewalk and the oncoming vehicle motorway before meeting the oncoming vehicle; if the vehicle runs in front of the lanes 11 and 12, the vehicle should leave the crossroad from the lanes 11 and 12 as soon as possible on the premise of ensuring that pedestrians and vehicles turning right preferentially run;

in the step S1, the oncoming vehicle has just run at the entrance, or the oncoming vehicle is a right-turn vehicle, a left-turn vehicle should follow the route 2 with a chance, and the left-turn vehicle has already run into an area between the sidewalk and the oncoming vehicle motorway before meeting the oncoming vehicle; if the flow of the pedestrians and the right-turning vehicles is dense and no driving opportunity exists, parking waiting is carried out according to the waiting vehicle scheme 1; according to the distance characteristics of the crossroad, vehicles need to wait in the area A, the included angle between the positions of the vehicles waiting to be parked and the east-west direction is 30 degrees, the vehicles can be sequentially arranged according to the positions, and the vehicles which are turned left as much as possible have the proper positions of the vehicles waiting to be parked in the crossroad area by the fault-tolerant sequencing method.

5. The design method for the left-turning traffic flow organization of the intersection with the complicated road conditions as claimed in claim 2, wherein: in the step S2, when the traffic flow direction is from east to west, if the left-turning vehicle belongs to a follow-up driving vehicle, the vehicle enters the intersection and intends to turn left, the opposite vehicle is driving in the same way, the left-turning vehicle has no chance to turn left, and the vehicle should move ahead along the following vehicle, and the vehicle should drive along the driving route 1, if the vehicle is the first left-turning vehicle, the vehicle enters the intersection at the position of a central point 16m, the vehicle waiting is inclined by taking the road central line as the vehicle bisector, the inclination angle between the vehicle waiting position and the road central line is 30 degrees, and the vehicle should wait in the area B; the waiting driving route is 2, and subsequent left-turning vehicles are sequentially subjected to fault-tolerant arrangement waiting; arranging 3 left-turning vehicles to wait for the vehicle at most in a fault-tolerant mode according to the width of the road;

in the step S2, when the traffic flow direction is from west to east, pedestrians on the crossroads pass through both sides of the south and north, if a left-turning vehicle travels into the intersection, it is found that there is a rare vehicle coming in an opposite direction, and the vehicle should travel according to the route 3 in compliance with the opportunity, and if the vehicle travels in front of the lane 17 and the lane 18, the vehicle should travel away from the crossroads from the lane 17 and the lane 18 as soon as possible on the premise of ensuring that the pedestrians and the right-turning vehicle preferentially travel, and the subsequent vehicle also has a sufficient distance to change lanes to the right side;

in the step S2, when the traffic flow direction is from west to east, pedestrians on crosswalks pass through both sides of the south and north, and an oncoming vehicle has just traveled to the entrance, or the oncoming vehicle is a right-turn vehicle, a left-turn vehicle should travel according to the route 4 with an opportunity, and the left-turn vehicle has traveled into an area between the sidewalk and the motorway of the oncoming vehicle before meeting the oncoming vehicle; when the vehicle is running in front of the lanes 17 and 18, the vehicle should leave the intersection from the lanes 17 and 18 as soon as possible and the following vehicle should have enough distance to change lanes to the right side on the premise of ensuring that the pedestrian and the right-turning vehicle preferentially run.

6. The design method for the left-turning traffic flow organization of the intersection with the complicated road conditions as claimed in claim 2, wherein: in the step S2, when the traffic flow direction is from west to east, pedestrians on the crosswalk pass in both the north and south directions, if a left-turning vehicle runs into the intersection, the opposite-turning vehicle also just runs into the intersection, or the opposite-turning vehicle is a right-turning vehicle, the left-turning vehicle follows the idea that the left-turning vehicle has the opportunity to drive away from the intersection in the fastest way, the intersection is not retained as much as possible to block the vehicles following the straight line, the vehicle runs according to a route 4, and if the traffic of the pedestrians and the right-turning vehicle is dense and the vehicles do not have the opportunity to drive, the vehicle should be stopped and wait according to a waiting scheme 3; according to the distance characteristics of the crossroad, vehicles need to wait in the area C, the included angle between the positions of the vehicles waiting and the east-west direction is 30 degrees, and the following vehicles can be sequentially arranged according to the positions in a fault-tolerant manner; the fault-tolerant sequencing method ensures that as many left-turning vehicles as possible have proper waiting positions in the intersection area, on one hand, the left-turning vehicles give way for the following straight-going vehicles, and on the other hand, the left-turning vehicles avoid blocking the passing of the opposite straight-going vehicles.

7. The design method for the left-turning traffic flow organization of the crossroad with complex road conditions as claimed in claim 2, wherein: in the step S2, when the traffic flow direction is from west to east, if the left-turning vehicle belongs to a follow-up driving vehicle, the vehicle is about to turn left when entering the intersection, the oncoming vehicle is driving with the left-turning vehicle, and the left-turning vehicle does not have a chance to turn left, and the vehicle should move ahead with the vehicle at this time, and drive according to the driving route 3, if the vehicle is the first left-turning vehicle, enter the intersection at the position of 16m, and incline to wait for the vehicle by taking the road center line as the vehicle bisector, the vehicle position to wait is 30 degrees from the road center line, the vehicle should wait for the vehicle in the area D, the waiting scheme is 4, and the following left-turning vehicles are sequentially subjected to fault-tolerant arrangement to wait for the vehicle, and the 3 left-turning vehicles are subjected to fault-tolerant arrangement at most according to the road width.

8. The design method for the left-turning traffic flow organization of the intersection with the complicated road conditions as claimed in claim 2, wherein: in the step S4, when the traffic flow direction is from north to south, the crosswalk and the pedestrians pass through the east side of the road. When the left-turning vehicle enters the intersection, due to the fact that the vehicle faces the central garden, the vehicle can drive for 10m after turning left, and the vehicle can drive according to the conventional route 5, and if the vehicle drives to the front of the lanes 15 and 16, the vehicle can drive away from the intersection from the lanes 15 and 16 under the condition that pedestrians and vehicles going straight from south to north preferentially pass.

9. The design method for the left-turning traffic flow organization of the intersection with the complicated road conditions as claimed in claim 2, wherein: in the step S4, when the traffic flow direction is from north to south, pedestrians on crosswalk roads pass through the east side of the road, left-turning vehicles run into the intersection, and for the reason that a central garden is faced, after the left-turning vehicles turn left, the vehicles should run for a distance of 10m and should run according to a conventional route 5, if the vehicles run to the front of the lane 15 and the lane 16, the pedestrians or the straight vehicles from south to north continuously pass through, and when the left-turning vehicles cannot pass through and need to stop, the vehicles can be stopped and wait in the area E, the waiting area is wide, the waiting scheme is 5, and the vehicle and the east-west direction form an included angle of 30 degrees, and can follow the vehicles or be in fault-tolerant arrangement;

in the step S4, when the traffic flow direction is from south to north, the pedestrian bridge is arranged on the west side of the left-turn vehicle, the left-turn vehicle runs into the intersection, and due to the fact that there is a central garden on the south side, the left-turn vehicle runs for a distance of 10m after turning left, and should run according to the conventional route 6, and if the left-turn vehicle runs to the front of the lane 13 and the lane 14, the left-turn vehicle runs away from the intersection from the lane 13 and the lane 14 under the condition that the straight-driving vehicle from north to south is guaranteed to run preferentially;

in the step S4, when the traffic flow direction is from south to north, the pedestrian bridge is arranged on the west side of the left-turning vehicle. The left-turning vehicle runs into the intersection, due to the fact that a central garden is arranged on the south side, the left-turning vehicle runs for a distance of 10m after turning left, and should run according to a conventional route 6, if the left-turning vehicle runs in front of a lane 13 and a lane 14, the left-turning vehicle runs continuously from the north to the south, the left-turning vehicle cannot run and needs to stop, the left-turning vehicle can stop in an area F for waiting, the waiting area is wide, the waiting scheme is 6, the included angle between the left-turning vehicle and the east and west is 30 degrees, and the left-turning vehicle can follow the vehicle or be arranged in a fault-tolerant mode.

10. The design method for the left-turning traffic flow organization of the crossroad with complex road conditions as claimed in claim 1, wherein: the crossroad mainly comprises: the northeast corner of the crossroad is a residential area and a market; the southeast corner of the crossroad is a provincial hospital; the south-north bidirectional road and the central garden are arranged between the southeast corner and the southwest corner of the crossroad; the southwest corner of the crossroad is a primary school, and the south side of the primary school is a university; northwest corners of the crossroad are residential areas and markets; pedestrian crosswalks are arranged on the east, south and north sides of the crossroad, and pedestrian overpasses are arranged on the west side; the basic situation of the traffic lane is as follows: the vehicle flow in the east-west direction of the crossroad is divided into two lanes in each direction; the road conditions of the south and north directions of the crossroad are complex, the traffic flow of the north side of the crossroad is divided into driving directions, four lanes are arranged in each direction, the incoming direction has two forms of coming vehicles of viaducts and coming vehicles of underground passages, the outgoing direction also has two forms of going vehicles of viaducts and going vehicles of underground passages, the two sides of a garden in the south center of the crossroad are respectively coming vehicles and going vehicles, two lanes are arranged in each direction, the distance between an east-west direction signal lamp and the crossroad is 2-32m, and the distance between the south-north direction signal lamp and the crossroad is 2-22m.

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