A driving guidance system and method for a left-turn waiting area

Abstract

The present invention provides a left-turn waiting area driving induction system and method, comprising: a video monitoring module, which is used to monitor the number of vehicles waiting to turn left and the available waiting positions in the left-turn waiting extension area; wherein the left-turn waiting extension area is composed of a plurality of lanes arranged in parallel at a crossroad, and each lane is connected to the corresponding left-turn lane; wherein each lane in the left-turn waiting extension area is arranged at a preset angle to the pedestrian crossing on the corresponding side; and a signal indication induction screen, which is used to control the vehicles in the left-turn lane to enter the left-turn waiting extension area based on the number of vehicles waiting to turn left and the available waiting positions in the left-turn waiting extension area.

Description

Technical Field

[0001] The invention belongs to the technical field of traffic control, and in particular relates to a driving guidance system and method for a left-turn waiting area. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Important traffic nodes in cities, such as large intersections, often become key areas of congestion due to heavy traffic loads and complex vehicle driving patterns. Contemporary intelligent transportation system innovation technologies are developing one after another and have even begun to be applied in some places. At the same time, in order to solve the problem of traffic congestion at the source, various intersection channelization and signal light design solutions are also being continuously optimized and updated. These solutions are committed to improving the efficiency of intersection traffic and alleviating and improving traffic congestion as much as possible.

[0004] The inventors found that the cost of channelizing and widening old large intersections is very high, and the improvement in intersection traffic efficiency by improving the design of traffic lights is becoming less and less obvious. How to increase traffic flow at intersections and improve congestion at intersections based on the existing lane width, existing traffic light settings and duration is an issue that needs to be addressed urgently at this stage. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a left-turn waiting area driving guidance system and method. The scheme maximizes the vehicle flow in the left-turn lane without changing the original lane width and the traffic light duration, improves the traffic congestion problem of the left-turn lane at old large intersections, solves the problem of vehicle congestion caused by the left-turn lane at the crossroads being a single channel, and solves the problem of vehicle congestion at the crossroads due to historical reasons of urban development.

[0006] According to a first aspect of an embodiment of the present invention, a left-turn waiting area driving guidance system is provided, comprising:

[0007] A video monitoring module, which is used to monitor the number of vehicles waiting to turn left and the available waiting positions in the left-turn waiting extension area; wherein the left-turn waiting extension area is composed of a plurality of parallel lanes located at a crossroad, and each lane is connected to a corresponding left-turn lane; wherein each lane in the left-turn waiting extension area is arranged at a preset angle to the pedestrian crossing on the corresponding side;

[0008] The signal indication induction screen is used to guide the vehicles in the left turn lane into the left turn waiting extension area based on the number of vehicles waiting to turn left in the left turn waiting extension area and the vacant waiting positions.

[0009] Furthermore, the video monitoring module specifically performs the following operations: obtaining an image of the current left-turn waiting extension area; and obtaining the number of vehicles waiting to turn left and the available waiting positions based on the image recognition result.

[0010] Furthermore, the signal indication induction screen specifically performs the following processing procedure: based on the obtained number of vehicles waiting to turn left and the number of vehicles waiting to turn left that can be accommodated in the left-turn waiting extension area, it is determined whether vehicles in the left-turn lane are allowed to enter; if so, based on the available waiting positions, the first color is displayed in the corresponding lane of the signal indication induction screen, and the second color is displayed in the remaining lanes to guide the vehicles in the left-turn lane to enter the left-turn waiting extension area; if not, all lanes are displayed in the second color.

[0011] Furthermore, the signal indication induction screen is arranged at the signal traffic light crossbar at the corresponding intersection directly in front of the left turn lane.

[0012] Furthermore, the video surveillance is arranged on the electronic police bar beside the crosswalk.

[0013] Furthermore, a left-turn waiting extension area is provided for each left-turn lane at the crossroad.

[0014] Furthermore, each lane in the left-turn waiting extended area accommodates one or more vehicles.

[0015] Furthermore, the preset angle is set to 30°.

[0016] Furthermore, the width of the left-turn waiting extended area is specifically the sum of the widths of two opposite central islands.

[0017] According to a second aspect of an embodiment of the present invention, a method for inducing driving in a left-turn waiting area is provided, which is used in the above-mentioned left-turn waiting area driving induction system, comprising:

[0018] When the left-turning traffic reaches the stop line of the left-turn lane, the number of vehicles in the left-turn waiting area and the available waiting positions are monitored through video surveillance;

[0019] Based on the monitoring result, the idle lane in the left-turn waiting extended area is indicated on the signal indication induction screen to guide the vehicles in the left-turn lane to enter the left-turn waiting extended area.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention provides a left-turn waiting area driving guidance system and method. The scheme maximizes the vehicle flow in the left-turn lane without changing the original lane width or the traffic light duration, improves the traffic congestion problem of the left-turn lane at old large intersections, and solves the problem of vehicle congestion caused by the left-turn lane at the crossroads being a single channel, as well as the problem of vehicle congestion at the crossroads due to historical reasons for urban development.

[0022] (2) The scheme described in the present invention creatively expands the previous old-fashioned single-lane left-turn waiting area into a multi-lane by improving the left-turn waiting area, thereby increasing the number of left-turn vehicles entering the intersection and reducing the number of stranded vehicles turning left at the intersection, so that left-turn vehicles can quickly enter the next intersection after passing the main intersection, reducing vehicle delays and improving the traffic capacity of the main intersection; and the left-turn waiting area can be coordinated and controlled by the corresponding signal indication induction screen, so that the traffic entering the waiting area can follow the real-time waiting area usage instructions on the signal indication induction screen, and enter the lane with vacant space in a timely and effective manner, thereby increasing the utilization efficiency of the waiting area and gradually improving the left-turn traffic capacity of the intersection.

[0023] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 It is a schematic diagram of the overall structure of a left-turn waiting area driving guidance system described in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of a waiting extension area for a single left turn (i.e., the width of the central island is the width of a single left turn lane) described in an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the waiting extension area for double left turns (i.e. the width of the central island is the width of two left-turn lanes) described in an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of a single waiting vehicle route according to an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a waiting route for a vehicle according to an embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the signal indication induction screen described in an embodiment of the present invention;

[0031] Among them, 1. Left-turn waiting area; 2. Video surveillance; 3. Signal indication and guidance screen; 4. Special area; 5. Center island; 6 to 10, left-turn extended lane; 11. Vehicle driving trajectory line; 12. Green light strip; 13-17, red light strip. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0036] Embodiment 1:

[0037] The purpose of this embodiment is to provide a driving guidance system for a left-turn waiting area.

[0038] A left-turn waiting area driving guidance system, comprising:

[0039] A video monitoring module, which is used to monitor the number of vehicles waiting to turn left and the available waiting positions in the left-turn waiting extension area; wherein the left-turn waiting extension area is composed of a plurality of parallel lanes located at a crossroad, and each lane is connected to a corresponding left-turn lane; wherein each lane in the left-turn waiting extension area is arranged at a preset angle to the pedestrian crossing on the corresponding side;

[0040] The signal indication induction screen is used to control the vehicles in the left turn lane to enter the left turn waiting extension area based on the number of vehicles waiting to turn left in the left turn waiting extension area and the vacant waiting positions.

[0041] In a specific implementation, the video monitoring module specifically performs the following operations: obtaining an image of the current left-turn waiting extension area; and obtaining the number of vehicles waiting to turn left and the available waiting positions based on the image recognition result.

[0042] In a specific implementation, the signal indication induction screen specifically performs the following processing procedure: based on the number of vehicles waiting to turn left obtained, and the number of vehicles waiting to turn left that can be accommodated in the left-turn waiting extension area, it is determined whether vehicles in the left-turn lane are allowed to enter; if so, based on the available waiting positions, the first color is displayed in the corresponding lane of the signal indication induction screen, and the second color is displayed in the remaining lanes to guide the vehicles in the left-turn lane to enter the left-turn waiting extension area; if not, all lanes are displayed in the second color.

[0043] In a specific implementation, the signal indication induction screen is arranged at the signal traffic light crossbar at the corresponding intersection directly in front of the left turn lane.

[0044] In a specific implementation, the video surveillance is set on the electronic police crossbar next to the crosswalk.

[0045] In a specific implementation, a left-turn waiting extension area is provided for each left-turn lane at the crossroad.

[0046] In a specific implementation, each lane in the left-turn waiting extended area accommodates one or more vehicles.

[0047] In a specific implementation, the preset angle is set to 30°.

[0048] In a specific implementation, the width of the left-turn waiting extension area is specifically the sum of the widths of two opposite central islands.

[0049] Specifically, for ease of understanding, the solution described in this embodiment is described below with reference to the accompanying drawings:

[0050] In order to solve the problems existing in the prior art, this embodiment provides a left-turn waiting area driving guidance system, which specifically adopts the following technical concepts:

[0051] The left-turn waiting area for left-turning vehicles entering the intersection is designed to run at a 30-degree angle from east to west, which reduces the number of vehicles stranded at the intersection, shortens the vehicle stranding time, and increases the left-turn throughput of subsequent vehicles.

[0052] By utilizing the special area 4 of the intersection, a plurality of lanes (five lanes are provided in this embodiment, which can be provided according to the actual situation) with an inclination angle of 30 degrees are arranged in the special area, and the waiting positions are arranged in a single row or double rows, depending on the actual situation, so as to effectively utilize the area in the intersection to the greatest extent and provide more drivable waiting area for left-turning vehicles. At the same time, according to the size of the intersection, there are four waiting positions that can meet this condition;

[0053] Waiting vehicles are arranged in front of the east-west center island 5 at the crossroad, and the width of the two opposite center islands is used to make the center area a special area 4. The waiting vehicles are arranged parallel to the east-west parking lanes with an inclined angle of 30 degrees to increase the subsequent traffic volume.

[0054] The special area 4 partially overlaps with the crosswalk and is as wide as the sum of the widths of the center island and the left-turn lane. This distance is set as a special area:

[0055] For several lanes in the left-turn waiting area (i.e. Figures 2 to 6 Left-turn extension lanes marked in (6 to 10): A single lane is the same width as the left-turn lane, and several lanes are parallel.

[0056] Specifically, the system described in this embodiment includes a video monitoring system 2 and a signal indication induction screen 3 (this embodiment uses an LED signal indication induction screen), which guides vehicles in the left-turn lane in the left-turn waiting extension area, wherein: Figure 4 and Figure 5 The vehicle travel trajectory line 11 is shown.

[0057] In this design method (taking the east entrance as an example), the video surveillance 2 is installed at a distance a from the entrance to be tested to the stop line and on the electronic police bar next to the crosswalk (the value range of a is 5 to 10 meters). The video surveillance used in this method is a front detection facing the rear of the vehicle. The front detection is mainly used to shoot the rear of the vehicle, monitor the number of waiting vehicles in each lane in the left-turn waiting extension area in real time, and detect whether there are any empty waiting positions in the lane. At the same time, the vehicle flow in each lane of the road section is monitored to realize the intelligent adjustment of traffic signal timing. Assume that each installation position is as follows: Figure 1 As shown, the video surveillance is installed in the form of a vertical pole on the electronic police crossbar. The video surveillance can cover all lanes of the left-turn waiting extension area in the horizontal direction (the scheme described in this embodiment is provided with 5 lanes), and the longitudinal detection range can reach 200 meters. Since the longitudinal shooting of the video surveillance is limited by the installation angle, the rear car is easily blocked by the front car, so the installation height and viewing angle of the video surveillance need to be adjusted. The installation height is b (the value range of b is 1.5-3 meters). The purpose is to make the monitoring camera angle meet the longitudinal depression angle to have no blind spots and no obstruction by large vehicles.

[0058] A signal indication induction screen (this embodiment uses an LED electronic signal indication induction screen) is installed at the signal traffic light crossbar at the corresponding intersection. The LED display screen changes red and green to indicate and instruct left-turning vehicles to enter the left-turn waiting area lane, or does not indicate that they are allowed to enter the left-turn waiting area lane.

[0059] In this design method (taking the east entrance as an example), the left-turn waiting extension area is a special area 4 where the left-turn lane extends forward. The width of this area is the sum of the width of the left-turn lane and the width of the actual road center island 5 of the intersection section, and it is at a 30-degree angle with the north-south traffic flow to increase the capacity of the waiting traffic flow in the area. Usually, 4 areas and 5 lanes can be set, and the area can also be set according to the actual situation of the intersection.

[0060] Embodiment 2:

[0061] The purpose of this embodiment is to provide a method for inducing driving in a left-turn waiting area.

[0062] A left-turn waiting area driving induction method, which is used in the above-mentioned left-turn waiting area driving induction system, comprises:

[0063] When the left-turning traffic reaches the stop line of the left-turn lane, the number of vehicles in the left-turn waiting area and the available waiting positions are monitored through video surveillance;

[0064] Based on the monitoring result, the idle lane in the left-turn waiting extended area is indicated on the signal indication induction screen to guide the vehicles in the left-turn lane to enter the left-turn waiting extended area.

[0065] For ease of understanding, the solution described in this embodiment is described in detail below with reference to the accompanying drawings:

[0066] A method for inducing driving in a left-turn waiting area specifically comprises the following steps:

[0067] Taking the east entrance as an example, when the left-turning traffic reaches the stop line of the left-turn lane, the video surveillance will monitor the lane conditions in the left-turn waiting area to determine whether there are any empty waiting positions in the lane. At the same time, the traffic flow in other lanes in the section is monitored to achieve joint control of traffic signals in the intersection.

[0068] Among them, Figure 6 The left-turn extension lanes 6 to 10 shown are provided with lane corresponding light strips 12 to 17 in sequence.

[0069] like Figure 2-Figure 4 As shown, before starting, the red light strip of the information sign on the LED electronic signal indication induction screen lights up and prohibits left-turning vehicles from entering the left-turn extended waiting area.

[0070] At the beginning (i.e., the clear lane sign on the LED electronic signal indication induction screen, such as the green light strip 10 corresponding to the left turn extension lane 6 to 10, lights up), the video monitoring is turned on to monitor the lane conditions in the left turn waiting extension area. If the lanes in the area are clear, Figure 6 As shown, the green light strips corresponding to the empty lane signs marked on the LED electronic signal indication induction screen, such as 6 to 10 left-turn extended lanes, will light up in sequence.

[0071] The green light strip of the 6-lane green guidance sign is on, and vehicles turning left follow Figure 3 The driving plan is to enter lane 6 along the ground markings. Video monitoring is continued. When it is detected that the capacity of lane 6 is the maximum, the green light strip 12 of the lane guidance mark is extinguished, and the red light strip 13 is lit, and left-turning vehicles are prohibited from entering lane 6.

[0072] The green light strip of the 7-lane green guidance sign is on, and vehicles turning left follow Figure 3 The driving plan is to enter lane 7 along the ground markings. Video monitoring is continued. When it is detected that the capacity of lane 7 is the maximum, the green light strip 12 of the lane guidance mark 7 goes out and the red light strip 14 lights up, and left-turning vehicles are prohibited from entering lane 7.

[0073] The green light strip of the 8-lane green guidance sign is on, and vehicles turning left follow Figure 3 The driving plan is to enter lane 8 along the ground markings. Video monitoring continues. When it is detected that the capacity of lane 8 is the maximum, the green light strip 12 of the lane guidance mark 8 turns off and the red light strip 15 turns on, and left-turning vehicles are prohibited from entering lane 8.

[0074] The green light strip of the 9th lane green guidance sign is on, and vehicles turning left follow Figure 3 The driving plan is to enter lane 9 along the ground markings. Video monitoring continues, and when it is detected that the capacity of lane 9 is the maximum, the green light strip 12 of the lane guidance sign 9 goes out, and the red light strip 16 lights up, and left-turning vehicles are prohibited from entering lane 9.

[0075] The green light strip of the 10-lane green guidance sign is on, and vehicles turning left follow Figure 3 The driving plan is to enter the 10th lane along the ground markings. Video monitoring continues. When it is detected that the capacity of the 10th lane is the maximum, the green light strip 12 of the 10th lane guidance mark goes out and the red light strip 17 lights up, and left-turning vehicles are prohibited from entering the 10th lane.

[0076] When the green light strips of all lane guidance signs are off and the red light strips are on, the following vehicle will wait for the green light strip of the green guidance sign to light up.

[0077] Subsequent left-turning vehicles follow the vehicle and drive straight until they reach the boundary of the left-turn extension waiting area, and then stop. When the left-turn light of the signal light is on, the following vehicle waits for the green light strip of the green guidance sign to go out, indicating that it is possible to turn left. Then all vehicles in the left-turn extension waiting area turn left and enter the next intersection.

[0078] Then, the next round of phase change begins.

[0079] In further embodiments, there is also provided:

[0080] An electronic device includes a memory and a processor, and computer instructions stored in the memory and executed on the processor, wherein when the computer instructions are executed by the processor, the method described in Embodiment 1 is performed. For the sake of brevity, no further description is given here.

[0081] It should be understood that in this embodiment, the processor may be a central processing unit CPU, and the processor may also be other general-purpose processors, digital signal processors DSP, application-specific integrated circuits ASIC, off-the-shelf programmable gate arrays FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0082] The memory may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory. For example, the memory may also store information about the device type.

[0083] A computer-readable storage medium is used to store computer instructions. When the computer instructions are executed by a processor, the method described in embodiment 1 is completed.

[0084] The method in the first embodiment can be directly embodied as a hardware processor, or a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

[0085] Those skilled in the art will appreciate that the units, i.e., algorithm steps, of the various examples described in the present embodiment can be implemented in electronic hardware or in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A left-turn waiting area driving guidance system, characterized in that: include: A video monitoring module, which is used to monitor the number of vehicles waiting to turn left and the available waiting positions in the left-turn waiting extension area; wherein the left-turn waiting extension area is composed of a plurality of parallel lanes located at a crossroad, and each lane is connected to a corresponding left-turn lane; wherein each lane in the left-turn waiting extension area is arranged at a preset angle to the pedestrian crossing on the corresponding side; A signal indication induction screen is used to control vehicles in the left-turn lane to enter the left-turn waiting extension area based on the number of vehicles waiting to turn left in the left-turn waiting extension area and the available waiting positions; The preset angle is set to 30°; The width of the left-turn waiting extension area is specifically the sum of the widths of the two opposite central islands; A left-turn waiting extended area is set up for left-turning vehicles entering the intersection, and it runs along the east-west at an angle of 30°. The special area of ​​the crossroad is utilized, and several lane waiting positions with an inclination angle of 30° are set up in the special area. Vehicles wait in front of the east-west center island position of the crossroad, and the width of the two opposite center islands is utilized, and the center area is used as a special area. The waiting vehicles are arranged parallel to the east-west parking lanes with an inclination angle of 30°. The special area partially overlaps with the crosswalk and is the same width as the sum of the width of the center island and the left-turn lane. Several lanes in the left-turn waiting extended area are a single lane with the same width as the left-turn lane, and several lanes are parallel.

2. A left-turn waiting area driving guidance system as claimed in claim 1, characterized in that: The video monitoring module specifically performs the following operations: obtaining an image of the current left-turn waiting extension area; and obtaining the number of vehicles waiting to turn left and the available waiting positions based on the image recognition result.

3. A left-turn waiting area driving guidance system as claimed in claim 1, characterized in that: The signal indication induction screen specifically performs the following processing procedure: based on the number of vehicles waiting to turn left obtained and the number of vehicles waiting to turn left that can be accommodated in the left-turn waiting extension area, it is determined whether vehicles in the left-turn lane are allowed to enter; if so, based on the available waiting positions, the first color is displayed in the corresponding lane of the signal indication induction screen, and the second color is displayed in the remaining lanes to guide the vehicles in the left-turn lane to enter the left-turn waiting extension area; if not, all lanes are displayed in the second color.

4. A left-turn waiting area driving guidance system as claimed in claim 1, characterized in that: The signal indication induction screen is arranged at the signal traffic light crossbar at the corresponding intersection just in front of the left turn lane.

5. The left-turn waiting area driving guidance system according to claim 1, characterized in that: The video surveillance is arranged on the electronic police crossbar beside the pedestrian crossing.

6. A left-turn waiting area driving guidance system as claimed in claim 1, characterized in that: A left-turn waiting extension area is provided for each left-turn lane at a crossroad.

7. A left-turn waiting area driving guidance system as claimed in claim 1, characterized in that: Each lane in the left-turn waiting extended area accommodates one or more vehicles.

8. A method for inducing driving in a left-turn waiting area, characterized in that: The method is used for a left-turn waiting area driving guidance system as claimed in any one of claims 1 to 7, and the method comprises: When the left-turning traffic reaches the stop line of the left-turn lane, the number of vehicles in the left-turn waiting area and the available waiting positions are monitored through video surveillance; Based on the monitoring result, the idle lane in the left-turn waiting extended area is indicated on the signal indication induction screen to guide the vehicles in the left-turn lane to enter the left-turn waiting extended area.

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