A method and system for publishing grid-based information on traffic incident warnings on national and provincial roads

Abstract

The present invention provides a method for issuing grid information of early warning of traffic incidents on national and provincial roads, including determining the time type, determining the publishing medium, dividing the grid area, formulating the plan publishing rules and generating the control plan. The present invention also provides a system for issuing grid information of early warning of traffic incidents on national and provincial roads for the above method, including a video traffic incident detection system, an information board, a speed limit sign, an induction light and a directional horn. The present invention is used to provide scientific and effective early warning measures for traffic incidents on national and provincial roads, enhance the operability and effective accessibility of the early warning plan, and win more early handling time for road maintenance. It mainly focuses on the prevention and short-term traffic control of typical traffic incidents such as road occupation, congestion, and bad weather. It establishes a unified, standardized and efficient control plan for typical emergencies that may occur on national and provincial roads, timely and effectively prevents the occurrence of secondary accidents, and avoids and reduces casualties and property losses to the greatest extent, ensuring the safety and smooth flow of roads.

Description

Technical Field

[0001] The present invention relates to the field of traffic incident warning, and in particular to a method and system for publishing grid information of traffic incident warning on national and provincial roads. Background Art

[0002] The incidence of accidents and secondary accidents on national and provincial roads is increasing significantly. As the traffic volume increases year by year, the number of accidents shows an upward trend. Among them, long downhill sections, tunnels and bridge sections are relatively accident-prone sections, mainly rear-end collisions, collisions with guardrails and rollovers. The main reasons for the frequent rear-end collisions are: cars changing lanes at will, cutting in, and obstructed vision due to bad weather.

[0003] 2 to 5 minutes after a sudden traffic incident is a high-incidence period for secondary accidents. According to the analysis of fatal accidents that occurred on the road section, fatal accidents caused by secondary or secondary accidents are generally no more than 5 minutes away from the first incident. Obviously, using this 5-minute period to provide safety warnings can effectively avoid major accidents. This requires us to solve two problems: one is timely discovery with a high accuracy rate; the other is to automatically control the on-site facilities after discovery to achieve safety warnings, and immediately carry out front-end warnings and control before major accidents occur, thereby effectively avoiding the occurrence of secondary accidents.

[0004] The national and provincial highway monitoring, early warning and control system is an effective means to ensure personal and property safety and smooth traffic. Under the existing traffic conditions, how to achieve monitoring, early warning and control through information and digital technology to maximize the personal and property safety of drivers and passengers and the smooth traffic has always been a matter of great concern to the national and provincial highway transportation management departments in all provinces across the country. In recent years, provincial highway owners in various countries have been trying to build or improve such systems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method and system for publishing grid-based information on traffic incident warnings on national and provincial roads, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for publishing grid-based information on traffic incident warnings on national and provincial roads, comprising:

[0007] S101, determining the event type, and classifying the event type according to different event types, so as to formulate corresponding control measures later;

[0008] S102. Determine the release medium and release it on the information board, with the assistance of speed limit signs, guidance lights and directional horns;

[0009] S103, dividing the grid area, dividing the national and provincial highways into a number of adjacent small areas according to, for example, mileage, and determining the boundaries between the small areas;

[0010] S104. Formulate rules for the release of emergency plans, define short-range and long-range intelligence boards according to the location of the incident, formulate control measures based on the incident, and form release rules;

[0011] S105. Generate a control plan, and combine the control measures in the release rules, the control measures include induced lane change measures and dynamic speed limit measures, to generate an emergency plan, which needs to take into account various possible situations, the control measures include induced lane change measures, speed limit (recommended speed) measures, fuzzy processing measures and event superposition release measures.

[0012] Preferably, the event types include traffic accidents occupying the road, construction occupying the road, obstacles occupying the road, pedestrians, livestock, wild animals intruding, congested and slow traffic, rain or heavy snow weather, heavy rain weather, strong wind weather, heavy fog weather and road icing events.

[0013] Preferably, the functions of the publishing medium include traffic safety tips, publishing road condition information and severe weather warnings, the traffic safety tips include speed limits, paying attention to driving safety and keeping a safe distance, the published road condition information includes road construction, accident congestion and haze weather, and the severe weather warnings include heavy rain, strong winds and thunderstorm weather warnings.

[0014] Preferably, a device location map is released, and national and provincial road section information release devices are marked to form an information release device location map;

[0015] The sections that require special attention are marked on the point map. The sections that require special attention include key sections, ordinary sections, tunnels, bridges and long downhill slopes. The grid is divided into 100 meters / intervals. Each section that requires special attention is divided into zones and each zone has at least one multi-functional information board and one broadcast loudspeaker at the front end. A video traffic time detection system is set up in each section that requires special attention. The zone should include the section that requires special attention and a section of at least 500 meters before it as the front end.

[0016] Preferably, an information board is defined, and the content to be published on the nearby information board is set according to the location where the traffic incident occurs. Traffic incidents are distributed in two ways: point distribution and regional distribution. Within a range of 0 to 10 km, at least three information boards closest to the incident are selected for publication. If there are less than three, the information board closest to the incident location is searched for 10 km away for publication.

[0017] The point distribution type events include main line traffic accidents and obstacles occupying the road. The distance between the location of the incident and the nearest information board behind the vehicle

[0018] In 0< ≤3km, recorded as short-range information board

[0019] exist >3km, recorded as long-distance information board;

[0020] The regional distribution type events include six types: construction occupying the road, congestion and slow traffic, heavy snow / icy road weather, heavy rain weather, strong wind weather and heavy fog weather. The regional distribution type events need to delineate the event area and determine the time boundary. The distance between the boundary stake position of the incident area and the nearest information board behind the vehicle is the road section affected by the incident.

[0021] In the area where the incident occurred, it is recorded as the incident area information board

[0022] In 0< ≤3km, recorded as short-range information board

[0023] exist Those >3km are recorded as long-distance information boards.

[0024] Preferably, the inducing lane change measures are aimed at events including traffic accidents occupying the road, construction occupying the road and obstacles occupying the road, and the information board releases information including inducing instructions, event types and occupied distance;

[0025] The speed limit (recommended speed) measures mentioned above are aimed at events including congestion and severe weather, and the information board publishes information including speed limit requirements, time types and control slogans;

[0026] The fuzzy processing measures are used for intrusion incidents including pedestrians, livestock or wild animals, where the intrusion incident occurs in a fuzzy area, the change process is uncertain, the boundary is unclear or the distance is unclear;

[0027] The event superposition release measures are aimed at the superposition of two events and three or more events. When two events are superimposed, the information board releases the relevant content of the two events in a rotation of 2s / time, and the speed limit requirement is released according to the lowest speed limit requirement of the two events. When three or more events are superimposed and there is no information board between the three events, the information board adopts the principle of proximity and releases the two closest events in a rotation of 2s / time. The visual recognition distance of the information board is 50m-200m. The time for drivers and passengers on national and provincial roads to obtain information from the information board is 5s, so the information board releases information in a rotation of 2s / time, and each information board can only release 2 pieces of information.

[0028] A national and provincial road traffic incident warning grid information release system includes: a video traffic incident detection system, an information board, a speed limit sign, an induction light and a directional speaker. The video traffic incident detection system is used to timely detect traffic incidents on the road and transmit event information, the information board is used to release text or image prompts, the speed limit sign is used to release speed limit information, the induction light is used to release flashing information, and the directional speaker is used to release voice prompts.

[0029] Preferably, an information board prompt is used to issue instructions to the driver by publishing text or images at the location where lane change is required; an induction light prompt is used to issue instructions to the driver by flashing induction lights at the location where lane change is required; and a voice prompt is used to play a voice prompt at the location where lane change is required to remind the driver to pay attention to lane change.

[0030] The present invention provides a method and system for publishing grid-based information on traffic incident warnings on national and provincial roads. It has the following beneficial effects:

[0031] 1. This plan is used to provide scientific and effective early warning measures for traffic incidents on national and provincial roads, enhance the operability and effective reach of early warning plans, and mainly focus on the prevention of typical traffic incidents such as road occupation, congestion, and bad weather, as well as short-term traffic control. For typical emergencies that may occur on national and provincial roads, a unified, standardized, and efficient control plan is established to prevent secondary accidents in a timely and effective manner, minimize and reduce casualties and property losses, and ensure road safety and smooth traffic.

[0032] (1) Event handling: Through the linkage of equipment and facilities, we can greatly reduce the reliance on manual inspections to discover abnormal traffic incidents and achieve active discovery and early handling of abnormal traffic incidents.

[0033] (2) Active control: By formulating control plans, enriching the control density and control methods, achieving full coverage of control measures on road sections, and enriching the control methods in key areas.

[0034] (3) Relieve congestion: By improving the application of active control, the duration of congestion caused by accidents can be shortened and the length of queues can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a flow chart of the method of the present invention;

[0036] Figure 2 It is a schematic diagram of the grid partitioning of the present invention;

[0037] Figure 3 It is a schematic diagram of the content structure of the information board of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical embodiments and advantages of the embodiments of the present invention clearer, the technical embodiments in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0040] The incidence of accidents and secondary accidents on national and provincial roads is increasing significantly. As the traffic volume increases year by year, the number of accidents shows an upward trend. Tunnels, bridges, and long downhill sections are relatively accident-prone sections, mainly rear-end collisions, guardrail collisions, and rollovers. The main reasons for the frequent rear-end collisions are: cars changing lanes at will, cutting in, and obstructed vision due to bad weather.

[0041] 2 to 5 minutes after a sudden traffic incident is a high-incidence period for secondary accidents. According to the analysis of fatal accidents that occurred on the road section, fatal accidents caused by secondary or secondary accidents are generally no more than 5 minutes away from the first incident. Obviously, using this 5-minute period to provide safety warnings can effectively avoid major accidents. This requires us to solve two problems: one is timely discovery with a high accuracy rate; the other is to automatically control the on-site facilities after discovery to achieve safety warnings, and immediately carry out front-end warnings and control before major accidents occur, thereby effectively avoiding the occurrence of secondary accidents.

[0042] The national and provincial highway monitoring, early warning and control system is an effective means to ensure personal and property safety and smooth traffic. Under the existing traffic conditions, how to achieve monitoring, early warning and control through information and digital technology to maximize the personal and property safety of drivers and passengers and the smooth traffic has always been a matter of great concern to the national and provincial highway transportation management departments in all provinces across the country. In recent years, provincial highway owners in various countries have been trying to build or improve such systems.

[0043] The embodiment of the present invention provides a method for publishing grid information of traffic incident warning on national and provincial roads, such as Figure 1-2 As shown, including:

[0044] S101, determining the event type, and classifying the event type according to different event types, so as to formulate corresponding control measures later;

[0045] S102. Determine the release medium and release it on the information board, with the assistance of speed limit signs, guidance lights and directional horns;

[0046] S103, dividing the grid area, dividing the national and provincial highways into a number of adjacent small areas according to, for example, mileage, and determining the boundaries between the small areas;

[0047] S104. Formulate rules for the release of emergency plans, define short-range and long-range intelligence boards according to the location of the incident, formulate control measures based on the incident, and form release rules;

[0048] S105. Generate a control plan, and combine the control measures in the release rules, the control measures include induced lane change measures and dynamic speed limit measures, to generate an emergency plan, which needs to take into account various possible situations, the control measures include induced lane change measures, speed limit (recommended speed) measures, fuzzy processing measures and event superposition release measures.

[0049] It is also necessary to continuously improve and enhance plans and systems based on actual operating conditions, timely summarize experiences and lessons learned from actual operations, optimize processes and technical means, and improve processing efficiency and quality.

[0050] As shown in the table below, typical traffic incidents on national and provincial highways are generally divided into several categories: traffic accidents, construction, obstacles, congestion, heavy snow / icy road weather, heavy rain, strong winds, and heavy fog.

[0051] Event Type Classification Location Traffic accident blocking the road Occupies 1, 2 or a combination of lanes Near and far distance Construction occupation of road Occupies 1, 2 or a combination of lanes Near and far distance Obstacles blocking the road Occupies 1, 2 or a combination of lanes Near and far distance Pedestrians, livestock, and wild animals intruding Occupy each lane Occurrence area Congestion and slow traffic Level 1, Level 2, Level 3 Occurrence area, near and far distance Rain / snow weather Level 1, Level 2, Level 3 Occurrence area, near and far distance Heavy rain Level 1, Level 2, Level 3 Occurrence area, near and far distance Windy weather Level 1, Level 2, Level 3 Occurrence area, near and far distance Foggy weather Level 2, Level 3, Level 4 Occurrence area, near and far distance Icy road incidents Level 1, Level 2, Level 3 Occurrence area, near and far distance

[0052] Event Release Medium Role

[0053] In this embodiment, emergency control is mainly carried out by relying on information boards, speed limit signs and other publishing media, and the main functions are as follows.

[0054] Traffic safety tips: including speed limit, driving safety, keeping distance, etc.

[0055] Release traffic information: including road construction, accident congestion, smog and other traffic conditions that affect driving;

[0056] Severe weather warning: including weather warnings such as heavy rain, strong winds, and lightning, reminding drivers to avoid risks and slow down.

[0057] Release media classification

[0058] The main publishing media are divided into the following categories:

[0059] Multifunctional T-shaped information board, which can publish pictures and text combined content;

[0060] Multifunctional F-type information board, which can publish pictures and text combined content;

[0061] Speed ​​limit signs, posting speed limit signs;

[0062] Directional loudspeaker, issuing guidance and prompt voice.

[0063] Meshing

[0064] Publish equipment point map

[0065] Information release equipment on national and provincial road sections are marked according to pile numbers to form a location map of information release equipment.

[0066] like Figure 2 As shown, set the interval division grid

[0067] The sections that require special attention are marked on the point map. The sections that require special attention include key sections, ordinary sections, tunnels, bridges and long downhill slopes. The grid is divided into 100 meters / intervals. Each section that requires special attention is divided into zones and each zone has at least one multi-functional information board and one broadcast loudspeaker at the front end. A video traffic time detection system is set up in each section that requires special attention. The zone should include the section that requires special attention and a section of at least 500 meters before it as the front end.

[0068] Rules for the release of emergency plans

[0069] Defining the information board

[0070] The content of the nearby information board is set according to the location where the traffic incident occurred. Traffic incidents can be distributed in two ways: point distribution and regional distribution.

[0071] Within the range of 0~10km, select at least 3 information boards (T board + F board) closest to the incident for release. If there are less than 3, search for the T board or F board closest to the location of the incident 10km away for release.

[0072] Point distribution events

[0073] There are two types of point-distributed traffic events: main line traffic accident occupying the road and obstacle occupying the road. The distance between the location where the incident occurred and the nearest information board behind the vehicle:

[0074] In 0< Those ≤3km are recorded as close-range information boards;

[0075] exist Those >3km are recorded as long-distance information boards.

[0076] Regional distribution events

[0077] There are six types of regional distribution traffic events: construction occupying the road, congestion and slow traffic, heavy snow / icy road weather, heavy rain weather, strong wind weather, and heavy fog weather. This type of event requires the demarcation of the event area and the determination of the event boundary. The D area is the distance between the position of the boundary pile number of the event area and the nearest information board behind the vehicle, which is the section of the road affected by the event.

[0078] Those in the area where the incident occurred are recorded as the incident area information board;

[0079] In 0< Those ≤3km are recorded as close-range information boards;

[0080] exist Those >3km are recorded as long-distance information boards.

[0081] Rules for issuing control measures

[0082] The control measures of the scheme in this embodiment include inducing lane change measures, speed limit (recommended speed) measures, fuzzy processing measures, and event superposition release measures.

[0083] Rule A: Induced lane change measures

[0084] The induced lane change measures on national and provincial highways are designed to guide vehicles to allocate lanes as reasonably as possible during driving to improve traffic flow and safety. They can help drivers and passengers better understand the current road conditions and adopt correct driving strategies in a timely manner.

[0085] This embodiment mainly adopts inducing lane change measures for road-occupying events, which are mainly divided into four types: traffic accident occupation, construction occupation, and obstacle occupation. Information board prompts, which issue instructions to drivers by posting text or images at the location where lane change is required; induction light prompts, which issue instructions to drivers by flashing induction lights at the location where lane change is required; voice prompts, which play voice prompts at the location where lane change is required to remind drivers to pay attention to lane change.

[0086] (1) Contents of lane change induction announcement

[0087] The content published on the information board must mainly cover the induction instructions + event type + road occupation distance. There are prescribed publishing formats for multi-functional T-type information boards and multi-functional F-type information boards.

[0088] (2) Control measures for typical road-occupying incidents

[0089] National and provincial road sections mainly use eight lanes in both directions, and the corresponding road occupation incidents are as follows.

[0090] 1) Traffic accidents on the main line

[0091] Control measures: Main line traffic accidents are point-distributed events, and lane change induction instructions are issued according to lanes on the close-range information board.

[0092] 2) Construction occupying the road

[0093] Control measures: Construction road occupation incidents are regional distribution incidents. Lane change induction instructions will be issued according to the lanes in the area where the construction road occupation incident occurs.

[0094] 3) Obstacles blocking the road

[0095] Control measures: Obstacles blocking the road are point-distributed events, and lane change induction instructions are issued according to lanes on the close-range information board.

[0096] Rule B: Speed ​​Limit (Recommended Speed) Measures

[0097] Speed ​​limit (recommended speed) measures on national and provincial highways refer to a management method that mainly uses information boards to implement maximum speed recommendations for vehicles on the road in order to ensure road traffic safety and reduce the incidence of traffic accidents. The recommended speed is set based on factors such as road conditions, weather conditions, and traffic flow to ensure that drivers drive at an appropriate speed and avoid speeding or driving too fast, which may cause danger. In addition, it also helps to balance the performance differences between different types of vehicles and promote smoother and more efficient traffic flow.

[0098] This plan mainly adopts speed limit (recommended speed) measures for three types of events: congestion and slow traffic, and severe weather (heavy snow / icy road surface, heavy rain, strong wind, and heavy fog).

[0099] (1) Speed ​​limit (recommended speed) content publishing rules

[0100] The information board should mainly include speed limit requirements + event types + control slogans. There are prescribed release formats for multifunctional T-type information boards and multifunctional new F-type boards.

[0101] (2) Control measures for typical speed limit incidents

[0102] 1) Congestion and slow-moving events

[0103] Referring to the standard "Road Traffic Congestion Evaluation Method" (GA / T115-2020), it is divided into three levels: light congestion, moderate congestion and severe congestion.

[0104] Speed ​​limits in congestion zones:

[0105] If the congestion speed can be detected, the speed limit in the congested slow-moving area shall be set according to the detected speed. If not, the speed limit in the congested slow-moving area shall be set according to the upper limit of the average travel speed with reference to the standard "Road Traffic Congestion Evaluation Method" (GA / T115-2020). The speed limit for mild congestion is 70km / h, for moderate congestion is 50km / h, and for severe congestion is 30km / h.

[0106] Dynamic step speed limit rules for congestion events:

[0107] Introducing parameters , defined as the vehicle speed on the congested slow-moving road section rounded up to an integer multiple of 10, or the vehicle speed value of the current congested road section combined with the real-time simulation system.

[0108] The speed limit at the nearby information board is ;

[0109] The speed limit on the long-distance information board is +30.

[0110] The dynamic speed limit implementation embodiment presents a step strategy, which can effectively improve the traffic efficiency of the congested slow-moving area, ensure that the traffic flow in the congested slow-moving area is fast and large-scale outflow, and effectively avoid vehicle queuing in the upstream section of the congested slow-moving area.

[0111] 2) Road sections with high traffic volume

[0112] Classification: Level 3 for heavy traffic sections, Level 2 for heavy traffic sections, and Level 1 for heavy traffic sections. Level 3 means congestion mileage ≥ 4km and congestion duration > 12 minutes; Level 2 means congestion mileage ≥ 6km and congestion duration > 16 minutes; Level 1 means congestion mileage > 8km and congestion duration > 20 minutes.

[0113] Speed ​​limits on roads with heavy traffic:

[0114] If the congestion speed can be detected, the speed limit in the congested slow-moving area shall be set according to the detected speed. If not, the speed limit in the congested slow-moving area shall be set according to the upper limit of the average travel speed with reference to the standard "Road Traffic Congestion Evaluation Method" (GA / T115-2020). The speed limit for mild congestion is 70km / h, for moderate congestion is 50km / h, and for severe congestion is 30km / h.

[0115] Dynamic step speed limit rules for high-traffic roads:

[0116] Introducing parameters , defined as the vehicle speed on the congested slow-moving road section multiplied upward by an integer of 10. Or the vehicle speed value of the current high-traffic road section can be obtained in combination with the real-time simulation system.

[0117] The speed limit at the nearby information board is ;

[0118] The speed limit on the long-distance information board is +30.

[0119] 3) Heavy snow weather events

[0120] Classification: Heavy snow weather level 3, heavy snow weather level 2, and heavy snow weather level 1. Level 3 is localized snow accumulation on ordinary roads, level 2 is snow accumulation on bridges, tunnels, and up and down ramps, and level 1 is large-scale snow accumulation on the road.

[0121] Speed ​​limit rules in heavy snow event areas:

[0122] After the heavy snow event occurred, the boundaries of the incident area were manually determined and the speed limit was set according to the classification standards: the first-level speed limit was 20, the second-level speed limit was 60, and the third-level speed limit was 80.

[0123] Dynamic ladder speed limit rules for heavy snow events:

[0124] Introducing parameters , defined as the vehicle speed on the heavy snow section rounded up to an integer multiple of 10. Or the vehicle speed value of the current heavy snow section can be obtained in combination with the real-time simulation system.

[0125] The speed limit at the nearby information board is ;

[0126] The speed limit on the long-distance information board is +30.

[0127] 4) Icy road incidents

[0128] Classification: There are three types of road icing: level 3, level 2, and level 1. Level 3 is local icing on ordinary roads, level 2 is icing on bridges, tunnels, and up and down ramps, and level 1 is large-scale icing on the road.

[0129] Speed ​​limit rules in areas where icy roads occur:

[0130] After an icy road incident occurs, the boundaries of the incident area are manually determined and the speed limit is set in the incident area according to the classification standards: the first-level speed limit is 20, the second-level speed limit is 60, and the third-level speed limit is 80.

[0131] Dynamic step speed limit rules for icy road events:

[0132] Introducing parameters , defined as the vehicle speed on the road section where the road surface is icy, rounded upward by an integer multiple of 10, or the vehicle speed value on the current icy road section in combination with the real-time simulation system.

[0133] The speed limit at the nearby information board is ;

[0134] The speed limit on the long-distance information board is +30.

[0135] 5) Heavy rain weather events

[0136] Classification: Heavy rain weather level 1, heavy rain weather level 2, heavy rain weather level 3. Level 3 means the 24-hour rainfall is between 50 and 100 mm, or the 12-hour rainfall is between 30 and 70 mm, or the hourly rainfall is between 16.0 and 32.0 mm. Level 2 means the 24-hour rainfall is between 100 and 250 mm, or the 12-hour rainfall is between 70 and 140 mm, or the hourly rainfall is between 32.0 and 64.0 mm. Level 1 means the 24-hour rainfall is greater than 250 mm, or the 12-hour rainfall is greater than 140 mm, or the hourly rainfall is greater than 64 mm.

[0137] Speed ​​limit rules in heavy rain event areas:

[0138] After a heavy rain event occurs, the boundaries of the event area are manually determined and demarcated, and the speed limit in the event area is set according to the classification standards: level 1 speed limit is 20, level 2 speed limit is 60, and level 3 speed limit is 80.

[0139] Dynamic ladder speed limit rules for heavy rain events:

[0140] Introducing parameters , defined as the vehicle speed on the heavy rain event section rounded up to an integer multiple of 10, or the current vehicle speed value on the heavy rain section combined with the real-time simulation system.

[0141] The speed limit at the nearby information board is ;

[0142] The speed limit on the long-distance information board is +30.

[0143] 6) High wind weather events

[0144] Classification: Strong wind weather level 1, strong wind weather level 2, strong wind weather level 3. Level 3 means the average wind force is level 7 (wind speed 13.9-17.1m / s), or gusts are level 8 (wind speed 17.2-20.7m / s). Level 2 means the average wind force is level 8 (wind speed 17.2-20.7m / s), or gusts are level 9 (wind speed 20.8-24.4m / s). Level 1 means the average wind force is level 9 (inclusive) (wind speed greater than 20.8m / s) or above, or gusts are level 10 or above (wind speed greater than 24.5m / s).

[0145] Speed ​​limit rules in high wind event areas:

[0146] After a strong wind event occurs, the boundaries of the event area are manually determined and demarcated, and the speed limit in the event area is set according to the classification standards: the first-level speed limit is 40, the second-level speed limit is 60, and the third-level speed limit is 80.

[0147] Dynamic ladder speed limit rules for high wind events:

[0148] Introducing parameters , defined as the vehicle speed on the high wind event section rounded up to an integer multiple of 10, or the current vehicle speed value on the high wind section combined with the real-time simulation system.

[0149] The speed limit at the nearby information board is ;

[0150] The speed limit on the long-distance information board is +30.

[0151] 7) Heavy fog weather events

[0152] The classification is based on the "Traffic Safety Control Conditions for National and Provincial Highways in Fog" (GB / T31445-2015) and is divided into Level 2, Level 3 and Level 4.

[0153] Speed ​​limit rules in foggy areas:

[0154] After a heavy fog incident occurs, the boundaries of the incident area are manually determined and demarcated, and the speed limit in the incident area is set according to the classification standards: the second-level speed limit is 20, the third-level speed limit is 40, and the fourth-level speed limit is 60.

[0155] Dynamic ladder speed limit rules for heavy fog events:

[0156] Introducing parameters , defined as the vehicle speed on the foggy road section rounded up to an integer multiple of 10, or the current vehicle speed on the foggy road section combined with the real-time simulation system.

[0157] The speed limit at the nearby information board is ;

[0158] The speed limit on the long-distance information board is +30.

[0159] Rule C: Fuzzy processing rules

[0160] In case of severe weather or the intrusion of pedestrians, livestock, wild animals and other incidents where the area is fuzzy, the change process is uncertain, the boundaries are unclear, and the distance is unclear, fuzzy processing rules are adopted.

[0161] (1) The boundary range is fuzzy, the event risk level is determined, and a speed limit reminder is set.

[0162] (2) The boundary range is vague and there are multiple risk levels. The speed limit is determined according to the highest risk level of the event.

[0163] (3) The overall area where the incident occurred is vague and the trend of change is uncertain, so the information board mainly releases warning information.

[0164] Event superposition publishing rules

[0165] (1) Two incidents overlap

[0166] If event 1 and event 2 occur simultaneously in the grid area, information board 1 will publish the contents related to event 1 and 2 in a 2s / time round screen. Among them, the speed limit setting is published according to the minimum speed limit requirement of event 1 and event 2.

[0167] (2) Three or more incidents occur simultaneously

[0168] If event 1, event 2 and event 3 occur simultaneously in the grid area, and there is no information board between event 1, event 2 and event 3, then information board 1 will adopt the principle of proximity and release events 1 and 2 on the screen every 2 seconds.

[0169] The visual recognition distance of the information board is 50m-200m, so the time for drivers and passengers on national and provincial highways to obtain information from the information board is 5s. Therefore, the information board releases information in a rotation of 2s / time, and each information board can only release 2 pieces of information.

[0170] Information board style setting rules

[0171] The color of the graphics and text on the information board in this embodiment is generally set with reference to "Traffic Information Released by Road Traffic Information Services through Variable Information Boards" (GB / T29103-2012) and "Road Traffic Signs and Markings Part 2: Road Traffic Signs" (GB5768.2-2022), and the release style of various information boards is specified according to the information boards set up on the main line.

[0172] The embodiment of the present invention also provides a national and provincial road traffic incident warning grid information release system, including: a video traffic incident detection system, an information board, a speed limit sign, an induction light and a directional speaker. The video traffic incident detection system is used to timely detect traffic incidents on the road and transmit event information, as shown in Figure 3. The information board is used to release text or image prompts, the speed limit sign is used to release speed limit information, the induction light is used to release flashing information, and the directional speaker is used to release voice prompts.

[0173] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for issuing grid-based information on traffic incident warnings on national and provincial roads, characterized in that: include: S101, determining the event type, and classifying the event type according to different event types, so as to formulate corresponding control measures later; S102. Determine the release medium and release it on the information board, with the assistance of speed limit signs, guidance lights and directional horns; S103, dividing the grid area, dividing the national and provincial highways into a number of adjacent small areas according to the mileage, and determining the boundaries between the small areas; S104. Formulate rules for the release of emergency plans. Within the range of 0 to 10 km from the incident location, select at least three information boards closest to the incident for release. If there are less than three, search for the information board closest to the incident location 10 km away for release. Combined with the incident, formulate control measures and form release rules. S105, generating a control plan, combining the control measures in the published rules, wherein the control measures include inducing lane change measures, speed limit recommended speed measures, fuzzy processing measures, and generating an emergency plan; The inducing lane change measures are aimed at events including traffic accidents, construction and obstacles occupying the road, and the information board releases information including inducing instructions, event types and occupied distance; The speed limit recommended speed measures are aimed at events including congestion and severe weather, and the information board publishes information including speed limit requirements, time types and control slogans; The fuzzy processing measures are aimed at intrusion incidents including pedestrians, livestock and wild animals, where the intrusion incident occurs in a fuzzy area, has an uncertain change process, has unclear boundaries and an unclear distance, and adopts fuzzy processing rules.

2. A method for issuing grid-based information on traffic incident warnings on national and provincial roads according to claim 1, characterized in that: The S101 specifically includes: S1011. The types of events include traffic accidents, construction, obstacles, intrusion of pedestrians, livestock, wild animals, congestion and slow traffic, rain or snow, heavy snow, heavy rain, strong winds, heavy fog and icy road surface.

3. The method for issuing grid-based information on traffic incident warnings on national and provincial roads according to claim 1 is characterized in that: The S102 specifically includes: S1021. The functions of the publishing medium include traffic safety tips, road condition information and severe weather warnings. The traffic safety tips include speed limit, driving safety and keeping a safe distance. The road condition information includes road construction, accident congestion and haze weather. The severe weather warnings include heavy rain, strong wind and thunderstorm weather warnings.

4. A method for issuing grid-based information on traffic incident warnings on national and provincial roads according to claim 1, characterized in that: The S103 specifically includes: S1031. Release equipment point map, mark the national and provincial road section information release equipment, and form an information release equipment point map; S1032. Mark the sections that need special attention on the point map. The sections that need special attention include key sections, ordinary sections, tunnels, bridges and long downhill slopes. Divide the grid into 100 meters / section, divide each section that needs special attention into zones and ensure that the front end of each zone is equipped with at least one multi-functional information board and one broadcast loudspeaker. Set up a video traffic time detection system in each section that needs special attention. The zone should include the section that needs special attention and the section before it as the front end.

5. The method for issuing grid-based information on traffic incident warnings on national and provincial roads according to claim 1 is characterized in that: The S104 specifically includes: S1041. Define information boards, and set the content to be published on nearby information boards according to the location where the traffic incident occurs. Traffic incidents can be distributed in two ways: point distribution and regional distribution. S1042: The point-like distribution type events include main line traffic accidents and obstacles occupying the road, record The distance between the location of the incident and the nearest information board behind the vehicle In 0< ≤3km, recorded as close distance information board >3km, recorded as long-distance information board; S1043: The regional distribution type events include construction occupying the road, congestion and slow traffic, heavy snow / icy road weather, heavy rain weather, strong wind weather and heavy fog weather. The regional distribution type events need to delineate the event occurrence area and determine the time boundary. The distance between the boundary stake position of the incident area and the nearest information board behind the vehicle is the road section affected by the incident. In the area where the incident occurred, it is recorded as the incident area information board In 0< ≤3km, recorded as close distance information board Those >3km are recorded as long-distance information boards.

6. A method for issuing grid-based information on traffic incident warnings on national and provincial roads according to claim 1, characterized in that: The S105 specifically includes: The control measures also include event superposition release measures. The time superposition release measures are for the superposition of two events and three or more events. When two events are superimposed, the information board releases the relevant content of the two events in a rotation of 2s / time, and the speed limit requirement is released according to the lowest speed limit requirement of the two events. When three or more events are superimposed and there is no information board between the three events, the information board adopts the principle of proximity and releases the two closest events in a rotation of 2s / time. The visual recognition distance of the information board is 50m-200m. The time for drivers and passengers on national and provincial roads to obtain information from the information board is 5s, so the information board releases information in a rotation of 2s / time, and each information board can only release 2 pieces of information.

7. A national and provincial highway traffic incident warning grid information release system, using the national and provincial highway traffic incident warning grid information release method according to any one of claims 1 to 6, characterized in that: It includes a video traffic incident detection system, an information board, a speed limit sign, an induction light and a directional speaker. The video traffic incident detection system is used to timely detect traffic incidents on the road and transmit event information, the information board is used to publish text and image prompts, the speed limit sign is used to publish speed limit information, the induction light is used to publish flashing information, and the directional speaker is used to publish voice prompts.

8. The national and provincial highway traffic incident warning grid information release system according to claim 7, characterized in that: The information board prompts, which gives instructions to the driver by publishing text and images at the location where lane change is required; the induction light prompts, which gives instructions to the driver by flashing induction lights at the location where lane change is required; the voice prompts, which play voice prompts at the location where lane change is required, reminding the driver to pay attention to lane change.

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