Highway traffic emergency blocking control method based on the dillard effect

Abstract

The present application relates to a kind of highway traffic emergency blocking control method based on the effect of Tyndall, belong to the field of highway operation safety and emergency management and control. Including: monitoring center obtains traffic event related information and judges whether to block traffic;If not blocking traffic, then open road section variable information board, sound and light alarm and traffic signal light warning oncoming vehicle;If traffic is to be blocked, then on the basis of opening road section variable information board, sound and light alarm and traffic signal light, simultaneously open light smoke screen blocking equipment, to reduce the vehicle entering the incident area and block oncoming vehicle in the blocking area before the incident area;In the case where traffic needs to be blocked, a control model is constructed with the purpose of blocking traffic as soon as possible and minimizing the number of vehicles entering the incident area, and the working state of the sound and light alarm and the light smoke screen blocking equipment is adjusted according to the vehicle density and speed feedback in the blocking area. The present application can be applied to different accident categories and environments, and has the effects of rapid warning, safe guidance or rapid parking.

Description

Technical Field

[0001] This invention belongs to the field of highway operation safety and emergency management, and relates to a highway traffic emergency blocking control method based on the Tyndall effect. Background Technology

[0002] In recent years, highway traffic infrastructure incidents and major traffic emergencies have occurred frequently. When these emergencies occur, traditional measures, when manned, mainly rely on manually deploying warning signs or cones to stop vehicles immediately. However, these measures have limitations: short visibility distances and low visibility conditions, such as at night, can easily lead to rear-end collisions and other secondary accidents. Especially when highway infrastructure emergencies or major traffic accidents occur in unmanned areas, if the accident site is equipped with monitoring equipment, it takes time for remote alarms to reach professional rescue teams. Without monitoring equipment, drivers and passengers are entirely responsible for identifying and avoiding accident risks. Therefore, when traffic infrastructure emergencies occur, such as slope or road collapses, bridge collapses, or tunnel fires, they often result in mass casualties.

[0003] To avoid such hazards, some research and construction units have installed automatic barrier gates and other facilities on key traffic infrastructure sections or sections with prominent safety hazards. However, for highways with high vehicle speeds, the long-distance visibility of barrier gates is poor, especially at night or in dense fog or other conditions with poor visibility, which can easily lead to secondary accidents such as collisions or rear-end collisions. Some scholars have also proposed using a water curtain + projection method to block vehicles. However, since this solution can only be displayed in dark environments and requires a water source, it cannot meet the needs of all-weather emergency control of infrastructure. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a highway traffic emergency blocking control method based on the Tyndall effect. It adopts light smoke screen blocking technology based on the Tyndall effect, which has the advantage of long-distance visibility both day and night. It is applicable to the safe blocking of vehicles in different road sections of traffic infrastructure and in the event of major traffic emergencies. It meets the requirements of rapid event identification and targeted blocking in the event of an emergency, so as to more effectively play the role of rapid and safe blocking and minimizing the level of accident damage.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for emergency road traffic control, comprising:

[0007] The monitoring center obtains information related to traffic incidents and determines whether traffic needs to be blocked based on this information.

[0008] If it is not necessary to block traffic, turn on the variable message signs, audible and visual alarms and traffic lights to warn oncoming vehicles.

[0009] If traffic needs to be blocked, in addition to activating variable message signs, audible and visual alarms and traffic lights, light smoke barrier equipment should be activated simultaneously to reduce the number of vehicles entering the incident area and block oncoming vehicles in the blocking area in front of the incident area; different working modes of light smoke barrier equipment should be selected according to wind direction and visibility.

[0010] In situations where traffic needs to be blocked, a control model is constructed. This model aims to block traffic as quickly as possible and minimize the number of vehicles entering the incident area. Based on feedback from vehicle density and speed within the blocked area, the operating status of the audible and visual alarms and the light smoke screen blocking equipment is adjusted.

[0011] Furthermore, obtaining information related to traffic incidents includes obtaining the location of the incident, the type of incident, whether there are hazardous chemical vehicles at the scene, whether the entire lane is affected, and the visibility range during the time of the incident; among which, the types of incidents include tunnel fires, bridge collapses, road collapses, slope collapses, and traffic accidents.

[0012] Furthermore, the decision to block traffic is based on the type of incident, whether there are hazardous chemical vehicles at the scene, whether the entire lane is affected, and the visibility range during the time of the incident, including:

[0013] Traffic disruption is necessary when the event type is a tunnel fire or a bridge collapse;

[0014] If the incident type is road collapse and there are hazardous chemical vehicles at the incident location, traffic must be blocked; if there are no hazardous chemical vehicles but the entire road surface of all lanes has collapsed, traffic must be blocked; if there are no hazardous chemical vehicles and at least one lane of the road surface has not collapsed, but visibility is low, traffic must be blocked; otherwise, traffic does not need to be blocked.

[0015] If the incident type is slope collapse and there are hazardous chemical vehicles at the incident location, traffic must be blocked; if there are no hazardous chemical vehicles but the collapse area covers the entire lane, traffic must be blocked; if there are no hazardous chemical vehicles, at least one lane is not covered by the collapsed obstacle, but visibility is low, then traffic should be blocked; otherwise, traffic does not need to be blocked.

[0016] Traffic must be blocked if the incident is a traffic accident and there are hazardous chemical vehicles at the location of the incident; traffic must be blocked if there are no hazardous chemical vehicles but the entire lane is blocked; otherwise, traffic does not need to be blocked.

[0017] Furthermore, the different working modes of the light smoke barrier equipment can be selected according to wind direction and visibility, including: when the wind direction is relatively perpendicular to the driving direction, the light smoke barrier equipment is in the smoke machine preset mode; when the wind direction is relatively consistent with the driving direction, the light smoke barrier equipment is in the smoke machine rotation mode.

[0018] On rainy days, at night, or in low visibility conditions, a smoke-free or thin smoke light curtain mode is used to expedite the formation of the obstruction warning message; on sunny days or in high visibility conditions, a dense smoke light curtain mode is used to make the obstruction warning message more conspicuous and easily visible.

[0019] In situations where fog causes low visibility, a smokeless light curtain mode is used, utilizing natural fog to form a light curtain.

[0020] Furthermore, the control model is expressed as:

[0021]

[0022] In the formula, The objective function of the control model is... To prevent vehicles from entering the incident area during the system response activation process, The number of vehicles that entered the incident area before they had time to stop or react after the system was activated; This indicates whether to enable or disable the response parameters for a specific device. If the device is not enabled, the corresponding device... It is 0 if it is not 1 otherwise; The response time for blocking the system from starting; The time required for the blocking system to fully activate until the vehicle comes to a complete stop; The activation sequence in the blocking system is as follows: i The response time of the devices is used. When multiple devices are turned on simultaneously in the same turn-on sequence, the longest response time is taken. express The change in vehicle density due to slowing down within a given time period; express The vehicle density during the time period as the vehicle further decelerates until it comes to a complete stop; The vehicle density within the blocking area when the blocking system begins to decelerate before the blocking information is fully formed during the activation process; For the blocking system to be fully activated, at the beginning of the blocking information formation, when some vehicles do not react in time, and the vehicles slow down significantly but do not come to a complete stop, the vehicle density in the blocking area is as follows: This indicates the vehicle density within the blocked area after the vehicles have come to a complete stop. To block the system's maximum response time; Traffic volume under normal traffic conditions; For time Average speed of vehicles passing through the blocked area For time Average speed of vehicles passing through the blocked area. This indicates the average speed of vehicles passing through the barrier area when the barrier system is not activated. A binary variable representing whether a certain device exists in the barrier system; if the device exists in the barrier system, then the corresponding value is... It is 1 if it is true, otherwise it is 0. This indicates the number of device groups that are not turned on simultaneously.

[0023] The blocking system includes variable message signs for road sections, audible and visual alarms, traffic lights, and light smoke screen blocking equipment. The light smoke screen blocking equipment includes a laser generator, a smoke generator, and a strobe light.

[0024] Furthermore, the control model adjusts the decibels and frequency of the audible and visual alarms and strobe lights based on the vehicle density and speed within the blocking area, while simultaneously adjusting the smoke concentration generated by the smoke generator.

[0025] Furthermore, the method also includes the following steps: when the monitoring center detects through video that the vehicle has been completely blocked and stopped, or when the vehicle speed in the blocked area is zero, the laser generator is turned off first. The smoke generator is turned off after the professional rescue team arrives at the scene to implement traffic control. When the accident scene is completely cleared and the road is reopened, the audible and visual alarms and flashing lights are turned off, and the variable message signs on the road section are restored to normal traffic mode.

[0026] The beneficial effects of this invention are as follows:

[0027] (1) This invention provides a highway traffic emergency blocking control method based on Tyndall effect light smoke screen blocking technology. It can adopt the emergency control method of light smoke screen blocking technology according to different traffic incident types, visibility and the degree of lane blockage caused by the incident. It can quickly alert, guide or stop vehicles on site before professional personnel arrive, reduce incident risk, improve the efficiency of rapid rescue and disposal when professional rescue personnel arrive at the scene, and achieve the effect of minimizing traffic impact or quickly restoring traffic.

[0028] (2) This invention is applicable to barrier systems with different basic equipment. The remote control platform of the monitoring center realizes the automatic identification and control of the opening and closing of the barrier system, and performs real-time monitoring and adjustment of the control parameters in the control model, which improves the level of intelligence and efficiency of control and reduces the continued entry of vehicles.

[0029] (3) The present invention takes into account the condition that the light smoke screen blocking technology can utilize the Tyndall effect of atmospheric water mist to realize the medium, and formulates smoke opening strategies under different visibility conditions, which can further shorten the opening response time of the blocking system and quickly form light smoke screen blocking information, thereby minimizing the number of vehicles entering the incident area.

[0030] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0031] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0032] Figure 1 This is a structural block diagram of a highway traffic emergency blocking control method provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic flowchart of a highway traffic emergency blocking control method according to an embodiment of the present invention;

[0034] Figure 3 A diagram illustrating the rules for determining whether the blocking system is activated;

[0035] Figure 4 A schematic diagram of the system shutdown control method after the blocking effect is activated. Detailed Implementation

[0036] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0038] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0039] This invention primarily addresses the challenges of rapid event identification and system activation / control when using Tyndall effect-based light smoke screen technology in the event of sudden emergencies or major traffic incidents on highway transportation infrastructure. It aims to enable rapid and safe on-site vehicle control before the arrival of professional personnel.

[0040] Please see Figures 1 to 4 An embodiment of the present invention provides a highway traffic emergency blocking control method based on the Tyndall effect, the method being described below:

[0041] 1. When a traffic incident occurs, the monitoring center receives the uploaded incident information and analyzes the location of the incident, the type of incident, the types of vehicles on site, and the environmental visibility to determine whether it is necessary to block traffic.

[0042] like Figure 3 As shown, traffic is determined based on data such as the type of incident, whether there are hazardous chemical vehicles at the scene, whether the entire lane is affected, and the visibility range during the incident period. Specifically:

[0043] Traffic disruption is necessary when the event type is a tunnel fire or a bridge collapse;

[0044] If the incident type is road collapse and there are hazardous chemical vehicles at the incident location, traffic must be blocked; if there are no hazardous chemical vehicles but the entire road surface of all lanes has collapsed, traffic must be blocked; if there are no hazardous chemical vehicles and at least one lane of the road surface has not collapsed, but visibility is low, traffic must be blocked; otherwise, traffic does not need to be blocked.

[0045] If the incident type is slope collapse and there are hazardous chemical vehicles at the incident location, traffic must be blocked; if there are no hazardous chemical vehicles but the collapse area covers the entire lane, traffic must be blocked; if there are no hazardous chemical vehicles, at least one lane is not covered by the collapsed obstacle, but visibility is low, then traffic should be blocked; otherwise, traffic does not need to be blocked.

[0046] Traffic must be blocked if the incident is a traffic accident and there are hazardous chemical vehicles at the location of the incident; traffic must be blocked if there are no hazardous chemical vehicles but the entire lane is blocked; otherwise, traffic does not need to be blocked.

[0047] 2. Based on the judgment result, the control system activates relevant equipment to warn oncoming vehicles. The control system includes variable message signs, audible and visual alarms, traffic lights, and a smokescreen blocking device. The smokescreen blocking device includes a laser generator, a smoke generator, message signs, horns, flashing lights, and a control unit.

[0048] Specifically, such as Figure 1 As shown, if it is determined that traffic disruption is unnecessary, the blocking system will only activate equipment such as road information boards, audible and visual alarms, traffic lights, horns, and flashing lights to warn oncoming vehicles through sound and light fusion information, reduce the speed of oncoming vehicles, and prevent the accident from spreading.

[0049] If it is determined that traffic needs to be blocked, in addition to activating road information boards, audible and visual alarms, traffic lights, information boards, horns, and flashing lights, laser generators and smoke generators will be activated simultaneously to create a light smoke screen to further block oncoming vehicles.

[0050] According to the monitored wind direction, when the wind direction is relatively perpendicular to the driving direction, the light smoke curtain blocking device is in the preset smoke machine mode; when the wind direction is relatively consistent with the driving direction, the smoke machine of the light smoke curtain blocking device starts in the mode of rotating with the wind direction.

[0051] Furthermore, depending on the visibility range during the event period, in rainy weather, at night, or under low visibility conditions, a smokeless or thin smoke light curtain mode will be used to expedite the formation of the barrier warning information and minimize the number of vehicles entering the incident area. Specifically, in cases of low visibility due to fog, the smoke generator may not be activated, i.e., a smokeless light curtain mode will be used. Instead, the Tyndall effect of the naturally formed fog will be utilized to generate the barrier warning information, further reducing the response time of the barrier system and thus minimizing the number of vehicles entering the incident area. On sunny days or in high visibility conditions, a dense smoke light curtain mode will be used. The dense smoke light curtain will make the barrier warning information more conspicuous and easily visible, allowing drivers to notice it earlier and slow down.

[0052] 3. When it is necessary to block traffic, a control model is constructed to control the activation of the blocking system.

[0053] The specific methods for preventing the start-up control are as follows:

[0054] (1) Establish the objective function for determining the vehicle's potential entry into the incident area during the activation of the system response of the barrier system:

[0055] (1)

[0056] In the formula, To prevent vehicles from entering the incident area during the system response activation process, This represents the number of vehicles that entered the incident area before the system was activated, either before they had time to stop or before they had time to react.

[0057] The goal of the blocking start control is to make PI minimize.

[0058] (2) Construct a response time control model that combines event conditions and system settings:

[0059] (2)

[0060] In the formula, The activation sequence in the blocking system is as follows: i The response time of the device, when there are devices in the same startup sequence p When multiple devices are turned on simultaneously, the longest response time is used. ; , ... A binary variable representing the presence of a certain device in the barrier system, taking the value 1 or 0. Depending on the different infrastructure configurations of the barrier system, if the device exists in the barrier system, then the value corresponding to that device... Select 1 if the value is 1, otherwise select 0. This indicates the total number of groups with different startup sequences, i.e., the number of device groups that are not started simultaneously.

[0061] (3) Construct a vehicle traffic model for the system during the activation response time:

[0062] In response time During the process, the driver, upon receiving a warning message that the vehicle blocking system has been activated, transitions from a free-flowing driving state to a decelerated driving state. This deceleration information can be monitored by a vehicle detector within the response time of the device activation. During the process, if the average speed of vehicles passing through the blocked area is measured to be... Then in The number of vehicles passing through the blocked area within the specified time period was In the formula, express The change in vehicle density due to slowing down within a given time period, expressed in vehicles per kilometer. This indicates the average speed of vehicles passing through the barrier area when the barrier system is not activated.

[0063] (4) Construct a vehicle traffic model after the system is fully activated:

[0064] Once the blocking system is fully activated, the driver will receive a notification that the vehicle will no longer proceed and will be subject to a response time. The slow-moving traffic flow ahead will affect the vehicle speed, but due to the widespread hesitation and delays in stopping, the vehicle speed will further decrease until it comes to a stop. The average speed of vehicles passing through the blocked area during this process is set as... The time required for the blocking system to fully activate until the vehicle comes to a complete stop is set to... This time is related to the system settings and control methods. According to research findings, when two light smoke screen blocking devices are installed, Approximately 30 seconds to 1 minute, when only one light smoke screen blocking device is installed. It takes about 2 to 3 minutes. Within a given time period, the traffic volume passing through the blocked area was ,in, express The vehicle density during the time period during which vehicles further decelerate until they come to a complete stop is expressed in vehicles per kilometer.

[0065] (5) The control model for preventing the opening is:

[0066] According to the objective function To minimize the relationship between the above response time and vehicle passage, the following optimization model for the barrier system's opening control is constructed:

[0067] (3)

[0068] In the formula, This indicates the response parameters for determining whether to activate a device based on the type of incident or visibility range. If a device can be deactivated based on the type of incident or visibility range, then the corresponding response parameters for that device are... It is 0 if it is not 1 otherwise; The maximum response time when all facilities in the blocking system are activated is represented by equation (2); Traffic volume under normal traffic conditions; The vehicle density within the blocking area when the blocking system begins to decelerate before the blocking information is fully formed during the activation process; For the blocking system to be fully activated, at the beginning of the blocking information formation, when some vehicles do not react in time, and the vehicles slow down significantly but do not come to a complete stop, the vehicle density in the blocking area is as follows: The vehicle density is the density of vehicles within the blocked area after the vehicles have come to a complete stop. The blocking system is designed to prevent vehicles that would normally be stuck at an accident scene from being blocked in advance within a safe control area. , and This can be obtained by monitoring the number of vehicles within the controlled area. When The closer The more pronounced the vehicle deceleration and stopping is when the system is activated, the more effective the safety barrier is.

[0069] After the blocking system is fully activated, the system monitors vehicle density and speed within the blocking and event areas to assess its effectiveness and provides feedback control. For example, if the deceleration does not meet expectations, the system will automatically increase the decibels and frequency of the audible and visual alarms and strobe lights to enhance warning effectiveness, and activate or increase the smoke generator's spray concentration to further strengthen the blocking effect and reduce the delay time caused by vehicles not being able to stop in time. To reduce vehicle density within the blocking area while shortening the time required. This increases the vehicle's ability to quickly stop it.

[0070] By using the above-mentioned optimal control model, based on the identification of events and the system's activation control method, the system achieves the effect of the fastest safety blocking and the minimum number of vehicles entering the event area during the activation process, in accordance with the current event.

[0071] 4. When the monitoring center detects through video that the vehicle has been completely blocked and stopped, or that the vehicle speed within the blocked area is zero, the system can first shut down the laser generator. The smoke generator will be shut down after a professional rescue team arrives and implements traffic control. Once the accident scene is completely cleared and road traffic is restored, the audible and visual alarms on both sides will be turned off, and conventional traffic facilities such as variable message signs, lane indicators, and traffic lights will return to normal operation. The specific method for shutting down the blocking system is as follows: Figure 4 As shown.

[0072] The method described in this invention will be illustrated by a specific example below.

[0073] Taking the application of a barrier system in a long tunnel as an example, the traffic volume of this tunnel section is 2000 hev / h, the average vehicle speed in free flow is 100 km / h, and the road section ahead of the tunnel is straight. According to the design speed of the tunnel section and driving behavior theory, drivers will usually enter the tunnel at a higher speed. Therefore, when using Tyndall effect light smoke barrier technology, the design scheme is as follows: a gantry-type variable message sign is installed more than 500 m ahead of the tunnel; two sets of audible and visual alarms with different frequencies and decibels are installed outside the guardrails on both sides; the first light smoke barrier device is installed in front of the tunnel entrance; and the second light smoke barrier device is installed on the road section in front of the tunnel entrance.

[0074] Taking a fire accident in a tunnel as an example, the monitoring center detected the accident and immediately activated the emergency plan. The activation sequence and response time of the various devices related to the barrier are shown in Table 1 below.

[0075] Table 1

[0076]

[0077] According to the response time calculation formula, if the accident occurs during the day when visibility is good, the system needs to turn on the smoke generator. Then, from equation (2), we can obtain:

[0078]

[0079] This value represents the maximum response time when all facilities are enabled. If the accident occurs at night when visibility is poor, the system may not need to turn on the smoke generator. Then, from equation (2), we can obtain:

[0080]

[0081]

[0082] The above is the response time when the barrier system is fully activated. When an accident occurs, based on the safety and effectiveness of the barrier system, when the variable message signs and audible and visual alarms on the road section are activated in sequence 1 and 2, the vehicles have already received warning information and have a tendency or behavior to slow down. When the first and second barrier devices are activated, the vehicles receive obvious warning information and will generally slow down and stop.

[0083] Based on the tunnel's traffic volume of 2000 veh / h and average free-flow speed of 100 km / h, the traffic density monitored during the opening response process through the barrier installation area was as follows: The average speed is 36 veh / km. If the speed is 55 km / h, then according to equation (3):

[0084]

[0085] The number of vehicles entering the tunnel during the response activation process is:

[0086]

[0087] When the system detects low visibility and there is no need to activate the smoke generator, the system's response time is reduced from 55 seconds to 40 seconds. During this response period, the number of vehicles entering the tunnel can be controlled. The number of vehicles was reduced from 15 to 12.

[0088] When the barrier system is fully activated, some vehicles, unable to stop in time, continue into the tunnel until subsequent vehicles come to a complete stop. Assume the monitored traffic density passing through the barrier area during this process is . The average speed is 100 veh / km. If the speed is 20 km / h, then according to equation (3):

[0089]

[0090] The number of vehicles entering the tunnel due to their delayed reaction time is:

[0091]

[0092] According to equation (1), we get:

[0093]

[0094] The above assumes a lag time of 60 seconds. If, during the blocking process, the vehicle's deceleration and stopping behavior is monitored, and the decibels and frequency of the audible and visual alarms and strobe lights are adjusted based on the judgment results, and the smoke generator's spray concentration is increased, then by using feedback control to shorten the lag time to 30 seconds, the traffic density during that period can be further reduced. This assumes a traffic density that reaches a near-stopped state. The average speed is 120 veh / km. If the speed is 10 km / h, then:

[0095]

[0096] The number of vehicles entering the tunnel within the delay time is:

[0097]

[0098] As can be seen, based on the above feedback control, under low visibility conditions, by appropriately activating the barrier system to reduce the system response time, the number of vehicles entering the tunnel within the response time can be controlled to 12. Furthermore, by adjusting system equipment parameters (such as alarm decibels and flashing light frequency) to shorten the lag time, the vehicle density in the barrier area during the lag time can be reduced. Therefore, at a traffic volume of 2000 veh / h, the controlled number of vehicles entering the barrier area is:

[0099]

[0100] This further reduces the number of vehicles entering the tunnel. This control method effectively manages vehicles in accident tunnels, minimizing the number of vehicles entering the tunnel after an accident.

[0101] In summary, this invention proposes a highway traffic emergency blocking and control method for different accident types and environments, which can achieve the effects of rapid alert, safe guidance, or rapid stopping.

[0102] This invention can determine the control activation mode of the barrier system based on the accident type and the on-site environment. This includes determining whether to guide traffic or block vehicles based on the accident type, and whether to activate lasers and smoke screens based on the degree of accident hazard and visibility. Based on the high adaptability of Tyndall effect vehicle barrier technology and the ability to predict accident types and hazard levels, this invention provides a decision-making method for emergency vehicle barrier control for different types of emergencies and major traffic accidents, significantly improving the intelligence and emergency management capabilities of highway traffic infrastructure.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A highway traffic emergency blocking control method based on the Tyndall effect, characterized in that, The method includes: The monitoring center obtains information related to traffic incidents and determines whether traffic needs to be blocked based on this information. If it is not necessary to block traffic, turn on the variable message signs, audible and visual alarms and traffic lights to warn oncoming vehicles. If traffic needs to be blocked, in addition to activating variable message signs, audible and visual alarms and traffic lights, light smoke barrier equipment should be activated simultaneously to reduce the number of vehicles entering the incident area and block oncoming vehicles in the blocking area in front of the incident area; different working modes of light smoke barrier equipment should be selected according to wind direction and visibility. In situations where traffic needs to be blocked, a control model is constructed with the aim of blocking traffic as quickly as possible and minimizing the number of vehicles entering the incident area. The model adjusts the working status of the audible and visual alarms and the light smoke screen blocking equipment based on the vehicle density and speed feedback within the blocking area. The control model is represented as follows: In the formula, The objective function of the control model is... To prevent vehicles from entering the incident area during the system response activation process, The number of vehicles that entered the incident area before they had time to stop or react after the system was activated; The response time for blocking the system from starting; This indicates whether to enable or disable the response parameters for a specific device. If the device is not enabled, the corresponding device... It is 0 if it is not 1 otherwise; The time required for the blocking system to fully activate until the vehicle comes to a complete stop; The activation sequence in the blocking system is as follows: i The response time of the device, when there are devices in the same startup sequence p When multiple devices are turned on simultaneously, the longest response time will be used. express The change in vehicle density due to slowing down within a given time period; express The vehicle density during the time period as the vehicle further decelerates until it comes to a complete stop; The vehicle density within the blocking area when the blocking system begins to decelerate before the blocking information is fully formed during the activation process; For the blocking system to be fully activated, at the beginning of the blocking information formation, when some vehicles do not react in time, and the vehicles slow down significantly but do not come to a complete stop, the vehicle density in the blocking area is as follows: This indicates the vehicle density within the blocked area after the vehicles have come to a complete stop. To block the system's maximum response time; Traffic volume under normal traffic conditions; For time Average speed of vehicles passing through the blocked area For time Average speed of vehicles passing through the blocked area. This indicates the average speed of vehicles passing through the barrier area when the barrier system is not activated. A binary variable representing whether a certain device exists in the barrier system; if the device exists in the barrier system, then the corresponding value is... It is 1 if it is true, otherwise it is 0. Indicates the number of device groups that are not turned on simultaneously; The blocking system includes variable message signs for road sections, audible and visual alarms, traffic lights, and light smoke screen blocking equipment. The light smoke screen blocking equipment includes a laser generator, a smoke generator, and a strobe light.

2. The method according to claim 1, characterized in that, Obtaining information related to traffic incidents includes the location of the incident, the type of incident, whether there are hazardous chemical vehicles at the scene, whether the entire lane is affected, and the visibility range during the time of the incident. Among them, the types of incidents include tunnel fires, bridge collapses, road collapses, slope collapses, and traffic accidents.

3. The method according to claim 2, characterized in that, Whether to block traffic depends on the type of incident, whether there are hazardous chemical vehicles at the scene, whether it affects the entire lane, and the visibility range during the time of the incident, including: Traffic disruption is necessary when the event type is a tunnel fire or a bridge collapse; If the incident type is road collapse and there are hazardous chemical vehicles at the incident location, traffic must be blocked; if there are no hazardous chemical vehicles but the entire road surface of all lanes has collapsed, traffic must be blocked; if there are no hazardous chemical vehicles and at least one lane of the road surface has not collapsed, but visibility is low, traffic must be blocked; otherwise, traffic does not need to be blocked. If the incident type is slope collapse and there are hazardous chemical vehicles at the incident location, traffic must be blocked; if there are no hazardous chemical vehicles but the collapse area covers the entire lane, traffic must be blocked; if there are no hazardous chemical vehicles, at least one lane is not covered by the collapsed obstacle, but visibility is low, then traffic should be blocked; otherwise, traffic does not need to be blocked. Traffic must be blocked if the incident is a traffic accident and there are hazardous chemical vehicles at the location of the incident; traffic must be blocked if there are no hazardous chemical vehicles but the entire lane is blocked; otherwise, traffic does not need to be blocked.

4. The method according to claim 1, characterized in that, The different operating modes of the light smoke barrier equipment are selected according to wind direction and visibility. When the wind direction is relatively perpendicular to the driving direction, the light smoke barrier equipment is in the smoke machine preset mode. When the wind direction is relatively consistent with the driving direction, the light smoke barrier equipment is in the smoke machine rotation mode. On rainy days, at night, or in low visibility conditions, a smoke-free or thin smoke light curtain mode is used to expedite the formation of the obstruction warning message; on sunny days or in high visibility conditions, a dense smoke light curtain mode is used to make the obstruction warning message more conspicuous and easily visible.

5. The method according to claim 4, characterized in that, In situations where fog causes low visibility, a smokeless light curtain mode is used, utilizing natural fog to form a light curtain.

6. The method according to claim 1, characterized in that, The control model adjusts the decibels and frequency of the audible and visual alarms and strobe lights based on the vehicle density and speed within the blocking area, while simultaneously adjusting the smoke concentration generated by the smoke generator.

7. The method according to claim 1, characterized in that, The method also includes the following steps: when the monitoring center detects through video that the vehicle has been completely blocked and stopped, or when the vehicle speed in the blocked area is zero, the laser generator is turned off first. The smoke generator is turned off after the professional rescue team arrives at the scene to carry out traffic control. When the accident scene is completely cleared and the road is reopened, the audible and visual alarms and flashing lights are turned off, and the variable message signs on the road section are restored to normal traffic mode.

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