Traffic Warning Method and System for Intersections without Traffic Lights

Abstract

The traffic warning method and system for intersections without traffic lights provided by the present invention can detect the behavior of pedestrians when crossing the main road or branch road intersections without traffic lights. At the same time, according to the distance and vehicle speed information of vehicles on the road from the intersection, it can conduct real-time monitoring, warning and predictive analysis on the behavior of pedestrians crossing the road near the intersection, so as to conduct targeted early warnings. Thus, it better solves the problem that only lagging immediate warnings can be achieved at intersections without traffic lights, and early warnings cannot be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of road traffic, and particularly relates to a traffic warning method and system for intersections without traffic lights. Background Art

[0002] Currently, at some hidden intersections, intersections of some road branches with the main road, there are often no signal lights for control. The speed of the main road is relatively fast and the driver's observation range is limited. If pedestrians or non-motor vehicles suddenly cross the road from the intersection, it is extremely easy for the driver not to have time to decelerate and cause traffic accidents.

[0003] Currently, for these road intersections without traffic lights, in recent years, various government departments have also increased the construction of safety protection facilities (zebra crossings, guardrails, etc.) at such intersections.

[0004] In addition, with the development of intelligence in the field of traffic control, in the prior art, speed monitoring of vehicles is also carried out, and by detecting whether there are pedestrians on the crosswalk to prompt, the driver is made to decelerate and other methods to ensure the safety of intersections without control.

[0005] For example, in CN202010258926.6 - A method and system for detecting, identifying and warning pedestrians at a hidden intersection, the method introduced obtains whether there are vehicles within a predetermined range in front of the road; obtains whether there are pedestrians at the intersection; wherein, when there are pedestrians at the intersection, a first warning signal is issued; when there are vehicles at the intersection, a second warning signal is issued.

[0006] Another example is the patent CN201811160210.1 - A method for an intelligent traffic camera to automatically detect that a motor vehicle does not give way to a pedestrian, which introduces a method for an intelligent traffic camera to automatically detect that a motor vehicle does not give way to a pedestrian. The method captures and detects whether there are pedestrians moving on the crosswalk. If the motor vehicle does not decelerate, a second capture is performed and the picture is saved. If the motor vehicle directly passes through the intersection without stopping to give way to the pedestrian, the motor vehicle is captured again and the capture record is sent to the control analysis center for motor vehicle violation records, solving the shortcoming that the existing camera cannot detect that a motor vehicle does not give way to a pedestrian.

[0007] Another example is the patent CN201811544187.6 - A multi-level safety warning device and control method for pedestrians to cross the street at an intersection without control, which introduces a multi-level safety warning device and control method for pedestrians to cross the street at an intersection without control. The method uses the detection equipment at the intersection to continuously detect whether there are pedestrians crossing the street. When it is detected that there are pedestrians crossing the street, the warning prompt device 100 meters in front of the intersection and the warning lights about 50 meters in front of the intersection simultaneously remind the driver to pay attention to avoiding pedestrians, realizing two warnings for the driver and effectively ensuring the safety of pedestrians crossing the street at intersections without control.

[0008] However, the existing technologies usually focus on video surveillance, illegal capture, etc., or identify the current dangerous situation and provide immediate warning. However, for the intersections of national and provincial roads and township roads without traffic lights, due to the complex flow of people and vehicles in nearby villages, the above technical solutions cannot solve the safety problem of intersections without traffic lights. Summary of the invention

[0009] The purpose of the present invention is to provide a traffic warning method and system for intersections without traffic lights to solve the above-mentioned technical problems.

[0010] The present invention provides a traffic warning method for an intersection without a traffic light, wherein the intersection without a traffic light is located at the intersection of a main road and a branch road, comprising the steps of:

[0011] S11, obtaining the starting time when the pedestrian crosses the main road intersection without traffic lights;

[0012] S12, obtaining a first vehicle speed and a first distance from the current intersection of the vehicle located on the main road at the starting time and heading towards the current intersection;

[0013] S13, when the first distance is less than a first preset distance and the first vehicle speed is greater than a preset safety threshold vehicle speed, determining that the vehicle is crossing at a first risk;

[0014] S14, obtaining the number and / or frequency of the first dangerous crossing occurring at the current intersection within a preset time period;

[0015] S15, when the number and / or frequency is greater than a first preset threshold, a first prompt message is displayed on two display screens of vehicles at the main road intersection facing the main road respectively, to prompt vehicle drivers that the current intersection is prone to pedestrian crossing.

[0016] Further, the steps include:

[0017] S21, obtaining a second moment when the pedestrian crosses the main road intersection and walks to the middle of the main road and the walking distance is greater than a preset walking distance;

[0018] S22, obtaining a second vehicle speed and a second distance from the current intersection of the vehicle located on the main road and heading towards the current intersection at the second moment;

[0019] S23, when the second distance is less than a second preset distance and the first vehicle speed is greater than a preset safety threshold vehicle speed, determining that it is a second dangerous crossing, wherein the second preset distance is less than the first preset distance;

[0020] S24. Obtain the number and / or frequency of the occurrence of the second dangerous crossing at the current intersection within a preset time period;

[0021] S25. When the number and / or frequency is greater than a second preset threshold, display a second prompt message on two display screens respectively facing the vehicles traveling on the main road at the main road intersection to prompt the vehicle drivers that the current intersection is a high-incidence area for pedestrians to cross dangerously.

[0022] Furthermore, it includes the steps:

[0023] S31. Count the number of pedestrians crossing the main road at the current intersection per unit time;

[0024] S32. Analyze the peak time period for pedestrians to cross the main road based on the number of pedestrians;

[0025] S33. During the peak time period for pedestrians to cross the main road, display a third prompt message on two display screens respectively facing the vehicles traveling on the main road at the main road intersection to prompt the vehicle drivers that the current intersection is in the peak time period for pedestrians to cross at the current time.

[0026] Furthermore, it includes the steps:

[0027] S41. Obtain whether there are pedestrians crossing the main road at the main road intersection of the current intersection;

[0028] S42. If so, display a fourth prompt message on two display screens respectively facing the vehicles traveling on the main road at the main road intersection to prompt the vehicle drivers that there are pedestrians crossing at the current intersection.

[0029] Furthermore, it also includes the steps:

[0030] S43. Obtain whether there are pedestrians crossing the branch road at the branch road intersection of the current intersection;

[0031] S44. If the result of step S41 or S43 is yes, obtain whether there are vehicles driving towards the intersection without traffic lights on the main road and the branch road;

[0032] S45. If so, control the warning device arranged at the inflection point where the main road merges into the branch road to emit a fifth prompt message.

[0033] Furthermore, it also includes the steps:

[0034] S46. When the result of step S41 or S43 is yes, obtain the staying time of the pedestrians on the main road or the branch road;

[0035] S47. When the residence time exceeds a preset value, display a sixth prompt message on two display screens respectively facing the moving vehicles on the main road at the main road intersection, so as to prompt the vehicle driver that there are pedestrians staying at the current intersection.

[0036] Further, it further includes the steps:

[0037] S48. If the result of step S43 is yes, control to display a seventh prompt message on two display screens respectively facing the moving vehicles on the main road at the main road intersection, so as to prompt the vehicle driver that someone is crossing the current branch road; or control a warning device arranged at the inflection point where the main road merges into the branch road to emit an eighth prompt message to prompt the crossing pedestrians.

[0038] Further, when the judgment result of step S15 and / or step S25 is yes, send the judgment result of step S15 and / or step S25 to the supervision department corresponding to this traffic-lightless intersection.

[0039] Further, when the judgment result of step S15 and / or step S25 is yes, set a speed reduction sign beyond a third distance from the traffic-lightless intersection on the main road.

[0040] The present invention also provides a traffic warning system for a traffic-lightless intersection, including a server, a warning device arranged at the inflection point where the main road merges into the branch road, two display screens respectively facing the moving vehicles on the main road at the main road intersection, a camera device, a pedestrian sensing device, a vehicle speed measurement module and a vehicle distance measurement module. A computer program is stored on the server. When the computer program is executed, the steps of the traffic warning method described in any one of the above are realized.

[0041] The traffic warning method and system for a traffic-lightless intersection provided by the present invention can, by detecting the behavior of pedestrians when crossing the main road or the branch road intersection of the traffic-lightless intersection, and at the same time according to the distance and vehicle speed information of the vehicles on the road from the intersection, conduct real-time monitoring, warning and predictive analysis on the behavior of pedestrians crossing the road near the intersection, so as to conduct targeted early warning. Thus, it better solves the problem that only lagging immediate warning can be achieved at the traffic-lightless intersection and early warning cannot be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a layout schematic diagram of the traffic warning system for a traffic-lightless intersection in an embodiment of the present invention.

[0043] Figure 2 It is a module schematic diagram of the traffic warning system for a traffic-lightless intersection in an embodiment of the present invention.

[0044] Figure 3 This is a flowchart of a traffic warning method for an intersection without traffic lights in an embodiment of the present invention.

[0045] Figure 4 This is a flowchart of a traffic warning method for an intersection without traffic lights in another embodiment of the present invention.

[0046] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0047] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] In the following description, suffixes such as "module", "component" or "unit" used to represent elements are only for the convenience of explaining the present invention, and they have no specific meaning by themselves. Therefore, "module", "component" or "unit" can be used interchangeably.

[0049] Now, the present invention will be further described in detail with reference to the accompanying drawings.

[0050] Please also combine Figure 1 and Figure 2 , which provides a schematic architecture diagram of a traffic warning system 100 for an intersection without traffic lights according to the present invention.

[0051] The traffic warning system 100 for an intersection without traffic lights includes a server 11, a warning device 12 arranged at the inflection point where the main road 90 merges into the branch road 91, two display screens 13 respectively facing the driving vehicles on the main road 90 at the main road intersection 901, a camera device 14, a pedestrian sensing device 15, a vehicle speed measurement module 16, and a vehicle distance measurement module 17.

[0052] Preferably, in other embodiments, two display screens 132 respectively facing the driving vehicles on the branch road 90 may also be provided at the branch road intersection 911 to provide information related to the vehicle drivers when driving into the intersection without traffic lights on the branch road 91.

[0053] It can be understood that those skilled in the art should know that when setting a display screen or a sign at an intersection, the display screen or the sign is set at the position passing through the intersection in the forward direction of the road, that is, Figure 1 the corresponding sign is set at the position shown in. The two display screens respectively facing the driving vehicles on the road refer to the display screens in two different opposite directions on the road.

[0054] The camera device 14, the pedestrian sensing device 15, the vehicle speed measurement module 16, and the vehicle distance measurement module 17 can be directly installed above the display screen 13, or can be installed separately through a mounting rod or a mounting bracket.

[0055] Figure 1 Taking the crossroads as an example for illustration, if it is a T-shaped intersection, the display screen 12 and the warning device 12 in the corresponding direction can be cancelled; if it is a non-vertical intersection, the display screen 12 can be set at a position where the driver of the vehicle entering the intersection can easily see it according to the direction of the vehicle form at the intersection.

[0056] The pedestrian sensing device 15 can be installed separately, for example, above or beside the road; or it can be integrated on the warning device 12. For example, many pedestrian detection technologies have been disclosed in existing technologies such as CN202010699187.4 - A pedestrian crossing active warning method and system based on video detection.

[0057] The warning device 12, the display screen 13, the camera device 14, the pedestrian sensing device 15, the vehicle speed measurement module 16, the vehicle distance measurement module 17, and the server 11 are all connected to the network for communication. The server 11 can receive the data detected by the camera device 14 and the pedestrian sensing device 15, and at the same time send control signals to the warning device 12 and the display screen 13 to control the warning device 12 and the display screen 13 to perform corresponding operations.

[0058] Those skilled in the art should know that the settings, detections of the camera device 14, the pedestrian sensing device 15, the vehicle speed measurement module 16, and the vehicle distance measurement module 17, and the image recognition and other processing of the detected data to obtain traffic behavior data of vehicles and pedestrians are technical contents that can already be achieved in the prior art. Those skilled in the art can select and match the corresponding hardware and software according to needs to implement the above functions, which will not be elaborated in this application.

[0059] Based on the above traffic warning system 100 for intersections without traffic lights, this application can detect the behavior of pedestrians crossing the road and the driving behavior of vehicles, and provides a traffic warning method for intersections without traffic lights, including the steps:

[0060] S11, obtaining the starting moment when a pedestrian crosses the main road intersection of an intersection without traffic lights;

[0061] S12, obtaining the first vehicle speed of the vehicle on the main road and driving towards the current intersection at the starting moment and the first distance from the current intersection;

[0062] S13. When the first distance is less than the first preset distance and the first vehicle speed is greater than the preset safe threshold vehicle speed, it is determined as the first dangerous crossing.

[0063] S14. Obtain the number and / or frequency of the first dangerous crossings that occur at the current intersection within a preset time period.

[0064] S15. When the number and / or frequency is greater than the first preset threshold, display a first prompt message on two display screens respectively facing the vehicles traveling on the main road at the main road intersection to prompt the vehicle drivers that the current intersection has a high incidence of pedestrian crossings.

[0065] Pedestrians at un-signaled intersections on rural roads and national roads are generally from nearby villages and towns. The number of pedestrians passing through the intersection and their behaviors are regular. For example, the number of pedestrians passing through the intersection generally fluctuates little and are all nearby residents; when pedestrians cross the main road or branch road, they habitually abide by traffic rules and are relatively cautious, or the behavior of habitually not yielding to motor vehicles and directly crossing the road is also highly related to the quality of the people near the village or town. The direct manifestation is that the behavior styles of pedestrians crossing the road at this intersection are tendentious and regular; since the population near the village or town fluctuates little and their work and rest are regular, the time periods for crossing the road are also regular.

[0066] In steps S11 - S15, the behavior of pedestrians crossing the road can be detected by the camera device 14 or the pedestrian sensing device 15. At this time, by recording the starting moment when the pedestrian crosses the road (which can also be expressed as the time when the pedestrian just leaves the roadside where they need to cross the road), and then combining the first distance of the vehicle currently traveling on the main road 90 and approaching the current intersection from the main road intersection and the first vehicle speed of the vehicle; when the first distance is less than the first preset distance and the first vehicle speed is greater than the preset safe threshold vehicle speed, it means that when the pedestrian starts the action of crossing the main road intersection, the vehicle has already traveled relatively close to the intersection and the vehicle speed is relatively fast. At this time, it is determined as the first dangerous crossing. Among them, the first preset distance can be 30, 50, 100 meters, etc., and can be set specifically according to road conditions, etc.; the preset safe threshold vehicle speed can be set between 10 - 30 mph or others.

[0067] Detecting the first vehicle speed here can determine whether the vehicle has decelerated and yielded at this time. As long as the vehicle speed has dropped, the behavior of the pedestrian crossing the road should not be determined as a dangerous crossing. Only when the vehicle is already relatively close to the current intersection (less than the first preset distance) and the vehicle speed is still relatively fast, and the pedestrian crosses the main road without yielding to the vehicle and directly starts to cross the road, this is the first dangerous crossing.

[0068] When determining the occurrence of the first dangerous crossing, next, obtain the number and / or frequency of the occurrence of the first dangerous crossing at the intersection without traffic lights within a preset time period; when the number and / or frequency is greater than a first preset threshold, display a first prompt message on two display screens respectively facing the vehicles driving on the main road at the main road intersection, so as to prompt the vehicle driver that the current intersection is a high-incidence area for pedestrians to cross the road.

[0069] The preset time period mentioned here can be 1 hour, from 6 to 9 in the morning, from 4 to 6 in the afternoon, half a day, 1 day, 3 days, 1 week, half a month, 1 month, 3 months, half a year, 1 year, etc. Those skilled in the art can set it according to needs.

[0070] Combined with steps S11 - S15, the behavior analysis of pedestrians who often cross the road near the intersection without traffic lights can be obtained. If the number and / or frequency is greater than the first preset threshold, it indicates that nearby pedestrians often cross the road directly without giving way to vehicles. This section of the road is a key dangerous section and needs to be prompted.

[0071] When the display screen 13 is an electronic display screen, the server 11 can directly control the display screen 13 to display the first prompt message to prompt the vehicle driver that the current intersection is a high-incidence area for pedestrians to cross the road. If considering cost, ordinary warning signs can also be installed to prompt the above first prompt message when it is analyzed that this section of the road is a key dangerous section.

[0072] At this time, in this application, the traffic warning method for intersections without traffic lights further includes the steps:

[0073] S41, obtain whether there are pedestrians crossing the main road at the main road intersection of the current intersection;

[0074] S42, if so, display a fourth prompt message on two display screens respectively facing the vehicles driving on the main road at the main road intersection, so as to prompt the vehicle driver that there are pedestrians crossing the road at the current intersection.

[0075] Through steps S41 - S42, when there are pedestrians crossing the main road at the main road intersection, directly prompt the vehicle drivers on the main road driving towards the intersection.

[0076] It can be understood that the same settings can also be made for the branch road. Generally speaking, the vehicle speed on the branch road is slower than that on the main road, and the branch road crossing reminder can be selected according to needs.

[0077] Specifically, the traffic warning method for intersections without traffic lights further includes the steps:

[0078] Obtain whether there are pedestrians crossing the branch road at the branch road intersection of the current intersection;

[0079] If so, control the two display screens respectively facing the vehicles driving on the main road at the main road intersection to display the seventh prompt message to prompt the vehicle driver that someone is crossing the current branch road; or control the warning device set at the inflection point where the main road merges into the branch road to emit the eighth prompt message to prompt the crossing pedestrians.

[0080] Through step S49, when there are pedestrians crossing the branch road at the branch road intersection, directly prompt the vehicle drivers on the main road driving towards the intersection; or remind the pedestrians.

[0081] Preferably, in the present application, the traffic warning method for the intersection without traffic lights further includes the steps:

[0082] S21, obtain the second moment when the pedestrian crosses the main road intersection and the walking distance to the middle of the main road is greater than the preset walking distance;

[0083] S22, obtain the second vehicle speed of the vehicle located on the main road and driving towards the current intersection at the second moment and the second distance from the current intersection;

[0084] S23, when the second distance is less than the second preset distance and the first vehicle speed is greater than the preset safe threshold vehicle speed, it is determined as the second dangerous crossing, where the second preset distance is less than the first preset distance;

[0085] S24, obtain the number of times and / or frequency of the second dangerous crossing occurring at the current intersection within the preset time period;

[0086] S25, when the number of times and / or frequency is greater than the second preset threshold, display the second prompt message on the two display screens respectively facing the vehicles driving on the main road at the main road intersection to prompt the vehicle driver that the current intersection is a high-incidence area for dangerous pedestrian crossings.

[0087] In steps S21 - S25, the preset walking distance is generally less than 1 / 2 of the road width, that is, the second moment when the pedestrian crosses the main road intersection and the walking distance to the middle of the main road is less than half of the path. At this time, the second distance of the vehicle on the main road driving towards the current intersection from the main road intersection and the second vehicle speed of the vehicle are detected again. If the second distance is less than the second preset distance and the first vehicle speed is greater than the preset safe threshold vehicle speed, it is determined as the second dangerous crossing that is more urgent than the first dangerous behavior, where the second preset distance is less than the first preset distance.

[0088] Those skilled in the art can understand that in this situation, the pedestrian has already crossed the road, and the vehicle has come closer compared to that in steps S11 - S15, and the vehicle has not decelerated. At this time, the probability of a traffic accident increases sharply. Therefore, it is very necessary to identify such traffic behaviors.

[0089] Generally speaking, this kind of situation usually occurs when the pedestrian does not pay attention to the vehicles driving on the main road when starting to cross the main road, and at the same time, after starting to cross the road, does not return to the roadside in time and actively to cancel this road-crossing behavior and yield to the oncoming vehicle; secondly, the vehicle driver may not notice the pedestrian, or even if the driver sees the pedestrian crossing the road, may not intend to decelerate.

[0090] Furthermore, obtain the number and / or frequency of the occurrence of the second dangerous crossing at the intersection without traffic lights within a preset time period; when the number and / or frequency is greater than a second preset threshold, display a second prompt message on two display screens respectively facing the vehicles driving on the main road at the main road intersection to prompt the vehicle driver that the current intersection is a high-incidence area for pedestrians to cross dangerously.

[0091] Combined with steps S21 - S25, the behavior analysis of pedestrians who often cross the road near the intersection without traffic lights can be obtained. If the number and / or frequency is greater than the second preset threshold, it means that nearby pedestrians often cross the road immediately even when they see vehicles driving on the main road, and this section of the road is a more key dangerous section that needs to be prompted. The prompting method of the display screen 13 will not be elaborated here.

[0092] Preferably, in the present application, the traffic warning method for intersections without traffic lights further includes the following steps:

[0093] S31, count the number of pedestrians crossing the main road at the current intersection per unit time;

[0094] S32, analyze the peak time period for pedestrians to cross the main road based on the number of pedestrians;

[0095] S33, within the peak time period for pedestrians to cross the road, display a third prompt message on two display screens respectively facing the vehicles driving on the main road at the main road intersection to prompt the vehicle driver that the current intersection is in the peak time period for pedestrians to cross the road at the current time.

[0096] Combined with steps S31 - S33, the behavior analysis of pedestrians who often cross the road near the intersection without traffic lights can be obtained, and the peak time period for pedestrians to cross the main road at the main road intersection can be obtained. This peak time period is a key dangerous time period that needs to be prompted. The prompting method of the display screen 13 will not be elaborated here.

[0097] Preferably, in the present application, the traffic warning method for an intersection without traffic lights further includes the steps of:

[0098] S43. Obtain whether there are pedestrians crossing the branch road at the branch intersection of the current intersection;

[0099] S44. If the result of step S41 or S43 is yes, obtain whether there are vehicles driving towards the intersection without traffic lights on the main road and the branch road;

[0100] S45. If so, control the warning device arranged at the inflection point where the main road merges into the branch road to send out the fifth prompt message.

[0101] Through steps S43 - S45, when there are pedestrians crossing at the branch intersection, by detecting whether there are vehicles driving towards the intersection on the main road, if so, control the warning device arranged at the inflection point where the main road merges into the branch road to send out the fifth prompt message. Remind vehicles turning into the branch road to pay attention to pedestrians. This reminder method is particularly important at night or when visibility is poor.

[0102] Preferably, in the present application, the traffic warning method for an intersection without traffic lights further includes the steps of:

[0103] S46. When the result of step S41 or S43 is yes, obtain the staying time of the pedestrians on the main road or the branch road;

[0104] S47. When the staying time exceeds the preset value, display the sixth prompt message on the two display screens respectively facing the vehicles driving on the main road at the main road intersection to prompt the vehicle drivers that there are pedestrians staying at the current intersection.

[0105] Generally speaking, when pedestrians cross the road slowly due to inconvenient movement, playing and staying, carrying heavy objects, etc., the longer they stay on the road, the greater the possibility of traffic accidents. Therefore, through steps S46 - S47, when the staying time exceeds the preset value, display the sixth prompt message on the two display screens respectively facing the vehicles driving on the main road at the main road intersection to prompt the vehicle drivers that there are pedestrians staying at the current intersection.

[0106] Preferably, in the present application, the traffic warning method for an intersection without traffic lights further includes the step of: when the judgment result of step S15 and / or step S25 is yes, send the judgment result of step S15 and / or step S25 to the supervision department corresponding to the intersection without traffic lights. This is conducive to the supervision department arranging targeted traffic safety education, etc.

[0107] Preferably, in the present application, the traffic warning method for an intersection without traffic lights further includes the step of: when the judgment result in step S15 and / or step S25 is yes, a deceleration sign is set outside the third distance from the intersection without traffic lights on the main road. For example, a deceleration sign is set 100 meters away to further remind the driver to slow down when passing through the high-level intersection.

[0108] The present invention also provides a traffic warning system for an intersection without traffic lights, including a server, a warning device arranged at the inflection point where the main road merges into the branch road, two display screens arranged at the main road intersection and facing the vehicles driving on the main road respectively, a camera device, a pedestrian sensing device, a vehicle speed measurement module and a vehicle distance measurement module. A computer program is stored on the server, and when the computer program is executed, the steps of the traffic warning method described in any one of the above are realized.

[0109] Exemplarily, the computer program of the computer-readable storage medium includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0110] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "another embodiment", "other embodiments", or "the first embodiment to the Xth embodiment" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, method steps or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0111] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0112] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A traffic warning method for an intersection without traffic lights, wherein the intersection without traffic lights is located at the intersection of a main road and a branch road, characterized in that: The method comprises the following steps: S11, obtaining the starting time when a pedestrian crosses a main road intersection without a traffic light; S12, obtaining a first vehicle speed and a first distance from the current intersection of a vehicle located on the main road and heading towards the current intersection at the starting time; S13, determining that the first dangerous crossing occurs when the first distance is less than a first preset distance and the first vehicle speed is greater than a preset safety threshold speed; S14, obtaining the number and / or frequency of the first dangerous crossing occurring at the current intersection within a preset time period; S15, when the number and / or frequency is greater than a first preset threshold, displaying a first prompt message on two display screens of vehicles at the main road intersection facing the main road respectively, so as to prompt the vehicle driver that the current intersection is prone to pedestrian crossing; It also includes the following steps: S21, obtaining the second moment when the pedestrian crosses the main road intersection and the walking distance to the middle of the main road is greater than the preset walking distance; S22, obtaining the second speed of the vehicle located on the main road and heading towards the current intersection and the second distance from the current intersection at the second moment; S23, when the second distance is less than the second preset distance and the first speed is greater than the preset safety threshold speed, judging it as a second dangerous crossing, wherein the second preset distance is less than the first preset distance; S24, obtaining the number and / or frequency of the second dangerous crossing occurring at the current intersection within a preset time period; S25, when the number and / or frequency is greater than the second preset threshold, displaying a second prompt message on two display screens of the vehicles facing the main road at the main road intersection respectively, so as to prompt the vehicle driver that the current intersection is prone to dangerous pedestrian crossings.

2. The traffic warning method for an intersection without traffic lights according to claim 1, characterized in that: The method comprises the following steps: S31, counting the number of pedestrians crossing the main road at the current intersection within a unit time; S32, analyzing the peak time period of pedestrians crossing the main road according to the number of pedestrians; S33, during the peak time period of pedestrians crossing, displaying a third prompt message on two display screens of vehicles facing the main road at the main road intersection respectively, so as to prompt the vehicle driver that the current intersection is a peak time period of pedestrians crossing at the current time.

3. The traffic warning method for an intersection without traffic lights according to claim 1, characterized in that: The method comprises the following steps: S41, obtaining information on whether there are pedestrians crossing the main road at the main road intersection of the current intersection; and S42, if so, displaying fourth prompt information on two display screens of vehicles at the main road intersection facing the main road respectively, so as to prompt the vehicle driver that there are pedestrians crossing the current intersection.

4. The traffic warning method for an intersection without traffic lights according to claim 3, characterized in that: It also includes the steps of: S43, obtaining whether there are pedestrians crossing the branch road at the intersection of the current intersection; S44, if the result of step S41 or S43 is yes, obtaining whether there are vehicles on the main road and the branch road heading towards the intersection without traffic lights; S45, if so, controlling the warning device set at the turning point where the main road merges into the branch road to issue a fifth prompt message.

5. The traffic warning method for intersections without traffic lights according to claim 4, characterized in that: The method further comprises the step of: S46, when the result of step S41 or S43 is yes, obtaining the stay time of the pedestrian on the main road or branch road; S47, when the stay time exceeds a preset value, a sixth prompt message is displayed on two display screens of vehicles at the main road intersection respectively facing the main road to prompt vehicle drivers that there are pedestrians staying at the current intersection.

6. The traffic warning method for an intersection without traffic lights according to claim 4, characterized in that: It also includes the step: S48, if the result of step S43 is yes, then the second display screens arranged at the intersection of the main road and facing the vehicles traveling on the main road respectively are controlled to display the seventh prompt information to remind the vehicle drivers that someone is crossing the current branch road; or the warning device arranged at the turning point where the main road merges into the branch road is controlled to issue the eighth prompt information to remind the pedestrians crossing the road.

7. The traffic warning method for an intersection without traffic lights according to claim 1, characterized in that: When the judgment result of step S15 and / or step S25 is yes, the judgment result of step S15 and / or step S25 is sent to the supervisory department corresponding to the intersection without traffic lights.

8. The traffic warning method for an intersection without traffic lights according to claim 7, characterized in that: When the judgment result of step S15 and / or step S25 is yes, a deceleration sign is set at a third distance between the main road and the intersection without traffic lights.

9. A traffic warning system for intersections without traffic lights, characterized in that: The method comprises a service end, a warning device arranged at the turning point where the main road merges into the branch road, two display screens arranged at the intersection of the main road and facing the vehicles traveling on the main road respectively, a camera device, a pedestrian sensing device, a vehicle speed measurement module and a vehicle distance measurement module. A computer program is stored on the service end. When the computer program is executed, the steps of the traffic warning method as described in any one of claims 1 to 8 are implemented.

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