Traffic accident regulation method and regulation system

Abstract

The present invention provides a method and a system for regulating traffic accidents, including: obtaining accident information and an estimated duration of a traffic accident, as well as traffic flow information within a preset road range at the accident point of the traffic accident; determining an accident scenario category of the traffic accident according to the accident information; the accident scenario category includes general road traffic accidents, traffic accidents near ramps, tunnel traffic accidents, and hub traffic accidents; determining an influence range of the traffic accident according to the traffic flow information; determining a regulation level of the traffic accident according to the estimated duration and the influence range; regulating prompt information on a highway prompt device according to the accident scenario category and the regulation level, so as to divert traffic flow through the prompt information. In this way, the method of automatically adjusting the regulation level of a traffic accident through accident information reduces the traffic flow affected by the accident, and further reduces the probability of secondary accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of traffic accident handling, and in particular, to a regulation method and a regulation system for traffic accidents. Background Art

[0002] With the construction of traffic infrastructure in China, the number of vehicles has gradually increased, carbon emissions have increased day by day, and traffic safety problems on highways and their accompanying traffic congestion, energy consumption and waste, environmental protection and other issues have become increasingly severe. Due to the high speed of vehicles on highways, once a traffic accident occurs, the impact on road traffic, the resulting casualties and economic losses are huge.

[0003] Moreover, after a traffic accident occurs, a large area upstream of the accident point will be blocked. If there is a lack of effective control, the queue cannot be evacuated in time, resulting in more vehicles being trapped in congestion, which will cause a great burden on fuel consumption, carbon emissions, vehicle passing efficiency, etc. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a regulation method and a regulation system for traffic accidents, so as to reduce the traffic flow affected by the accident, reduce the traffic volume on the road upstream of the accident point, and thereby reduce the probability of secondary accidents.

[0005] In a first aspect, an embodiment of the present invention provides a regulation method for traffic accidents, which is applied to a server. The server is communicatively connected to a plurality of highway reminder devices; the method includes: obtaining accident information and an estimated duration of a traffic accident, as well as traffic flow information within a preset road range at the accident point of the traffic accident; the accident information includes the accident level, the number of affected lanes, the accident location stake number, and the stake number of the nearest upstream ramp entrance; determining the accident scenario category of the traffic accident according to the accident information; the accident scenario category includes ordinary road traffic accidents, traffic accidents near ramps, tunnel traffic accidents, and hub traffic accidents; determining the impact range of the traffic accident according to the traffic flow information; determining the regulation level of the traffic accident according to the estimated duration and the impact range; regulating the reminder information on the highway reminder devices according to the accident scenario category and the regulation level, so as to guide the traffic flow through the reminder information.

[0006] Further, the steps for determining the accident scenario category of a traffic accident based on accident information include: determining the accident point location of the traffic accident according to the accident location stake number; judging whether the accident point location is in a tunnel, and if so, determining that the accident scenario category of the traffic accident is a tunnel traffic accident; judging whether there is a hub within a unit length section upstream of the accident point, and if so, determining that the accident scenario category of the traffic accident is a hub traffic accident; judging whether there is a ramp within a unit length section upstream of the accident point, and if so, determining that the accident scenario category of the traffic accident is a traffic accident near a ramp; if not, determining that the accident scenario category of the traffic accident is an ordinary road traffic accident.

[0007] Further, the steps for determining the impact range of a traffic accident based on traffic flow information include: obtaining the upstream traffic flow sent by multiple microwave vehicle detectors within a first preset range upstream of the accident point of the traffic accident to obtain traffic flow information; obtaining the downstream traffic flow sent by multiple microwave vehicle detectors within a second preset range downstream of the accident point to obtain traffic flow information; calculating the upstream stable traffic flow at the accident point based on the upstream traffic flow; calculating the downstream stable traffic flow at the accident point based on the downstream traffic flow; calculating the maximum queue length of the traffic accident based on the upstream stable traffic flow, downstream stable traffic flow, and estimated duration; calculating the impact range of the traffic accident based on the maximum queue length.

[0008] Further, the steps for determining the regulation level of a traffic accident based on the estimated duration and impact range include: determining whether the traffic accident is a major traffic accident according to the estimated duration; if the traffic accident is a major traffic accident, determining that the regulation level of the traffic accident is a first-level regulation; if the traffic accident is not a major traffic accident, calculating the interval distance between the upstream ramp entrance and the accident point based on the accident location stake number and the stake number of the nearest upstream ramp entrance; when the impact range is greater than the interval distance, determining that the regulation level is a second-level regulation; when the impact range is less than the interval distance, determining that the regulation level is a third-level regulation.

[0009] Further, the steps for determining whether a traffic accident is a major traffic accident according to the estimated duration include: if the estimated duration is not less than the preset major accident handling time, determining that the traffic accident is a major traffic accident; otherwise, determining that the traffic accident is a non-major traffic accident.

[0010] Further, after the step of regulating the prompt information on the highway prompt device according to the accident scene category and regulation level to dredge the traffic flow through the prompt information, the method further includes: at every preset time interval, obtaining the real-time upstream stable traffic flow and the real-time downstream stable traffic flow sent by multiple microwave vehicle detectors within a preset range of the accident point, and calculating the real-time maximum queue length of the traffic accident according to the real-time upstream stable traffic flow and the real-time downstream stable traffic flow; determining the real-time regulation level of the traffic accident according to the real-time upstream stable traffic flow and the real-time maximum queue length; when the time interval between the measurement time of the real-time regulation level and the measurement time of the regulation level is less than the preset minimum change time, and the real-time regulation level is different from the regulation level, updating the prompt information on the highway prompt device according to the real-time regulation level.

[0011] Further, the step of determining the real-time regulation level of the traffic accident according to the real-time upstream stable traffic flow and the real-time maximum queue length includes: comparing the real-time upstream stable traffic flow with the upstream stable traffic flow, and comparing the real-time maximum queue length and the maximum queue length; if the real-time upstream stable traffic flow is greater than or equal to the upstream stable traffic flow, and the difference between the real-time maximum queue length and the maximum queue length is greater than or equal to the first preset queue length, determining that the real-time regulation level is the level above the current regulation level; if the real-time upstream stable traffic flow is less than the upstream stable traffic flow, and the difference between the real-time maximum queue length and the maximum queue length is less than the first preset queue length, and the difference between the real-time maximum queue length and the maximum queue length is greater than or equal to the second preset queue length, determining that the real-time regulation level is the current regulation level; if the real-time upstream stable traffic flow is less than the upstream stable traffic flow, and the difference between the real-time maximum queue length and the maximum queue length is less than the second preset queue length, determining that the real-time regulation level is the level below the current regulation level.

[0012] Further, after the step of regulating the prompt information on the highway prompt device according to the regulation level to dredge the traffic flow through the prompt information, the method further includes: if a road cleaning completed signal is received, determining that the real-time regulation level is the fourth-level regulation, and regulating the highway prompt device according to the preset regulation strategy corresponding to the fourth-level regulation; obtaining the downstream stable traffic flow after cleaning and the upstream stable traffic flow after cleaning at the accident point; if the downstream stable traffic flow after cleaning is greater than or equal to the upstream stable traffic flow after cleaning, restoring the highway prompt device to the normal state; if the downstream stable traffic flow after cleaning is less than the upstream stable traffic flow after cleaning, maintaining the real-time regulation level as the fourth-level regulation until the downstream stable traffic flow after cleaning is greater than or equal to the upstream stable traffic flow after cleaning.

[0013] In a second aspect, an embodiment of the present invention provides a traffic accident regulation system, which is applied to a server. The server is communicatively connected to a plurality of highway prompt devices. The system includes: an accident information acquisition module, configured to acquire accident information and an estimated duration of a traffic accident, as well as traffic flow information within a preset road range at the accident point of the traffic accident; the accident information includes an accident level, the number of affected lanes, the accident location stake number, and the stake number of the nearest upstream ramp entrance; an accident scenario determination module, configured to determine the accident scenario category of the traffic accident according to the accident information; the accident scenario category includes ordinary road traffic accidents, traffic accidents near ramps, tunnel traffic accidents, and hub traffic accidents; an influence range determination module, configured to determine the influence range of the traffic accident according to the traffic flow information; a regulation level determination module, configured to determine the regulation level of the traffic accident according to the estimated duration and the influence range; a regulation and traffic flow diversion module, configured to regulate the prompt information on the highway prompt devices according to the accident scenario category and the regulation level, so as to divert the traffic flow through the prompt information.

[0014] In a third aspect, an embodiment of the present invention provides an electronic device, including a memory and a processor. A computer program that can run on the processor is stored on the memory. When the processor executes the computer program, the above-mentioned method is implemented.

[0015] An embodiment of the present invention provides a traffic accident regulation method and a regulation system, including: acquiring accident information and an estimated duration of a traffic accident, as well as traffic flow information within a preset road range at the accident point of the traffic accident; determining the accident scenario category of the traffic accident according to the accident information; the accident scenario category includes ordinary road traffic accidents, traffic accidents near ramps, tunnel traffic accidents, and hub traffic accidents; determining the influence range of the traffic accident according to the traffic flow information; determining the regulation level of the traffic accident according to the estimated duration and the influence range; regulating the prompt information on the highway prompt devices according to the accident scenario category and the regulation level, so as to divert the traffic flow through the prompt information. In this way, the method of automatically adjusting the regulation level of a traffic accident through accident information is adopted, thereby reducing the traffic flow affected by the accident, and further reducing the probability of secondary accidents.

[0016] Other features and advantages of the present invention will be described in the following description, and part of them will be obvious from the description, or understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the description, claims, and drawings.

[0017] To make the above objectives, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given, and detailed descriptions are made in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Flowchart of the traffic accident regulation method provided in the first embodiment of the present invention;

[0020] Figure 2 Schematic diagram of the hub road traffic accident provided in the first embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the ordinary road traffic accident provided in the first embodiment of the present invention;

[0022] Figure 4 Flowchart of the steps for determining the influence range of the traffic accident according to the traffic flow information provided in the first embodiment of the present invention;

[0023] Figure 5 Flowchart of adjusting the regulation level according to the actual situation provided in the first embodiment of the present invention;

[0024] Figure 6 Flowchart of the regulation after the road cleaning is completed provided in the first embodiment of the present invention;

[0025] Figure 7 Schematic diagram of the traffic accident regulation system provided in the second embodiment of the present invention.

[0026] Icon: 1 - accident information acquisition module; 2 - accident scene determination module; 3 - influence range determination module; 4 - regulation level determination module; 5 - regulation and diversion of traffic flow module. Specific embodiments

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] In the domestic research on the impact scope of traffic accidents, most studies focus on the prevention of traffic accidents and reducing the probability of their occurrence. By comparing the weather data at the time of an accident with that when no accident occurred, the characteristics of the weather data at the time of the accident are found, and a probability model for the occurrence of the accident is established. If it is detected that the current weather data shows the characteristics analyzed before, a warning is issued to reduce the probability of traffic accidents. Or, using the traffic wave theory based on fluid mechanics, the impact scope of the accident is calculated. All these are theoretical studies and do not provide corresponding solutions and subsequent applications, nor specific and clear implementation means.

[0029] On the other hand, domestic research on traffic accident regulation focuses more on urban roads and on how to prevent traffic accidents. The research on the regulation of accidents that have occurred in the expressway field is still blank.

[0030] In the face of traffic accidents that have occurred on the expressway, there is no relevant research on regulation. The existing regulation of electromechanical equipment is all carried out manually by the monitor observing the video. Many times, the congestion has already occurred, and it is too late to carry out regulation. Therefore, there are deficiencies such as time-consuming and laborious, high error rate, lack of timeliness, and over-reliance on the personal experience of the monitor.

[0031] For the convenience of understanding this embodiment, the embodiments of the present invention will be introduced in detail below.

[0032] Embodiment 1:

[0033] Figure 1 It is a flowchart of the traffic accident regulation method provided in Embodiment 1 of the present invention.

[0034] Refer to Figure 1 , the traffic accident regulation method is applied to a server, and the server is communicatively connected to multiple expressway warning devices; the method includes:

[0035] Step S101, obtaining the accident information and estimated duration of a traffic accident, as well as the traffic flow information within a preset road range at the accident point of the traffic accident; the accident information includes the accident level, the number of affected lanes, the accident location stake number, and the stake number of the nearest upstream ramp.

[0036] Here, the estimated duration is t1, and the number of occupied lanes is N. The accident level is R, including a first-level accident R = 1, a second-level accident R = 2, a third-level accident R = 3, and a fourth-level accident R = 4. The cleaning time for a first-level accident is more than 3 hours: in the case of serious traffic accidents such as hazardous chemical leakage and large truck rollover, all lanes are impassable or there are safety hazards when vehicles pass. The cleaning time is extremely long, the difficulty is extremely high, there are casualties, and heavy lifting equipment needs to be dispatched.

[0037] The clean-up time for a Level 2 accident is 1 to 3 hours: in the case of multiple-vehicle collisions, with a lot of waste, debris, glass residues on the ground, oil and gas leakage, vehicle fires, the lane is fully or partially closed, and a certain amount of time is required for on-site cleaning, road washing, and fire extinguishing. The vehicle cannot leave on its own and a rescue vehicle needs to be dispatched for towing.

[0038] The clean-up time for a Level 3 accident is less than 1 hour: involving vehicle collisions, rear-end collisions, or scratches, with almost no debris on the floor and little need for cleaning, only temporarily occupying part of the lane, and there is no need for the monitoring center to dispatch a rescue vehicle to tow the vehicle. The vehicle can drive to the front service area or toll station by itself to wait for the traffic police to determine liability.

[0039] A Level 4 accident is an ordinary event: involving a flat tire or vehicle breakdown and requiring assistance from the monitoring center, etc. The control strategy is specified according to the lane occupancy situation.

[0040] Among them, the accident location stake number is the highway road location identification number (stake number) corresponding to the accident occurrence location. The stake number of the nearest upstream ramp is the highway road location identification number of the ramp closest to the accident location upstream of the accident location. The accident location stake number is X0, and the stake number of the nearest upstream ramp is X e , and the accident highway stake number is generally expressed as KA + B. Here, K is kilometers, A is the whole kilometer number, and B is the number of meters from the previous whole kilometer. For example, X0 = K100 + 500, indicating that the current accident location is 100.5 kilometers from the starting point of the highway, that is, 100 kilometers and then 500 meters further. The accident location stake number is X0 = KA0 + B0, and the stake number of the nearest upstream ramp is X z = KA z + B z , then the distance between the nearest upstream ramp and the current accident location is as shown in formula (1):

[0041] (1)

[0042] Among them, D z is the distance between the nearest upstream ramp and the current accident location.

[0043] Step S102, determine the accident scenario category of the traffic accident according to the accident information; the accident scenario category includes ordinary road traffic accidents, traffic accidents near ramps, tunnel traffic accidents, and hub traffic accidents.

[0044] In one embodiment, in step S102, it includes:

[0045] Determine the accident point location of the traffic accident according to the accident location stake number.

[0046] Judge whether the accident point location is in the tunnel. If so, determine that the accident scenario category of the traffic accident is a tunnel traffic accident.

[0047] Here, a tunnel traffic accident is a traffic accident that occurs inside a tunnel.

[0048] Determine whether there is a hub within a unit length section upstream of the accident point. If so, determine that the accident scenario category of the traffic accident is a hub traffic accident.

[0049] Here, referring to Figure 2 , a hub traffic accident is a traffic accident where there is a hub within one kilometer upstream. Among them, Figure 2 the "X" position in

[0050] Determine whether there is a ramp within a unit length section upstream of the accident point. If so, determine that the accident scenario category of the traffic accident is a traffic accident near a ramp; if not, determine that the accident scenario category of the traffic accident is a general road traffic accident.

[0051] Here, referring to Figure 3 , a general road traffic accident is a road traffic accident where there is no ramp within 1 kilometer upstream. A traffic accident near a ramp is a traffic accident where there is a ramp within 1 kilometer upstream. Among them, a traffic accident near a ramp includes a traffic accident with a ramp entrance and a traffic accident with a ramp exit. Figure 3 the "X" position in

[0052] Step S103, determine the impact range of the traffic accident according to the traffic flow information.

[0053] Here, the traffic flow information is obtained by microwave vehicle detectors installed on the highway, and the distance of the microwave vehicle detector from the accident point is determined by its corresponding highway mileage number.

[0054] Figure 4 is a flowchart of the step of determining the impact range of the traffic accident according to the traffic flow information provided in Embodiment 1 of the present invention.

[0055] In one embodiment, referring to Figure 4 , the step of determining the impact range of the traffic accident according to the traffic flow information includes:

[0056] Step S201, obtain the upstream traffic flow sent by multiple microwave vehicle detectors within a first preset range upstream of the accident point of the traffic accident to obtain traffic flow information.

[0057] Here, the first preset range A can be set according to the actual situation. Within the first preset range A upstream of the accident point X0 of the traffic accident, there are i microwave vehicle detectors, and the multiple microwave detectors within the first preset range upstream of the accident point are used to detect the upstream traffic flow Q i .

[0058] Step S202: Obtain the downstream traffic flow sent by multiple microwave vehicle detectors within the second preset range downstream of the accident point to obtain traffic flow information.

[0059] Here, the second preset range B is smaller than the distance between the accident point and the first ramp entrance downstream, and can be set according to the actual situation. Within the second preset range B downstream of the accident point X0 of the traffic accident, there are j microwave vehicle detectors, and multiple microwave detectors within the second preset range downstream of the accident point are used to detect the downstream traffic flow Q. j 。

[0060] Step S203: Calculate the upstream stable traffic flow at the accident point based on the upstream traffic flow.

[0061] Here, the mileage number of each microwave vehicle detector upstream of the accident point is X si =KA i +B i , within the first preset range A, the mileage number of the vehicle detector farthest from the accident point is X se =KA se +B se , according to the following formula (2), the distance between each microwave vehicle detector and the accident point is:

[0062] (2)

[0063] Among them, D si is the distance between the i-th upstream microwave vehicle detector and the accident point within the first preset range.

[0064] According to the following formula (3), the distance between the microwave vehicle detector farthest from the accident point and the accident point within the first preset range is:

[0065] (3)

[0066] Among them, D se is the distance between the microwave vehicle detector farthest from the accident point upstream of the accident point and the accident point within the first preset range.

[0067] According to the following formula (4), the calculation method of the weight of each microwave vehicle detector is:

[0068] (4)

[0069] Among them, w i is the weight of the i-th microwave vehicle detector, is the offset. The weight of the microwave vehicle detector farther from the accident point is smaller, and the weight of the microwave vehicle detector closer to the accident point is larger.

[0070] According to the following formula (5), the stable traffic flow upstream of the accident point is:

[0071] (5)

[0072] Where Q sa is the stable traffic flow upstream of the accident point.

[0073] Step S204, calculate the stable traffic flow Q f of the accident point based on the downstream traffic flow.

[0074] Here, the station number of each microwave vehicle detector downstream of the accident point is X xj =KA j +B j , within the second preset range B, the station number of the vehicle detector farthest from the accident point is X xe =KA xe +B xe , the calculation method of the distance and traffic flow of the downstream microwave vehicle detector is the same as that of the upstream microwave vehicle detector and traffic flow. Referring to formulas (2) to (5), the distance D xj from the j-th microwave vehicle detector downstream within the second preset range to the accident point, the distance D xe from the microwave vehicle detector farthest from the accident point downstream of the accident point within the second preset range to the accident point, the weight w j of the downstream microwave vehicle detector, and the stable traffic flow Q f downstream of the accident point can be obtained.

[0075] Step S205, calculate the maximum queue length of the traffic accident based on the upstream stable traffic flow, downstream stable traffic flow, and estimated duration.

[0076] Here, in the case where the lanes are cleared in sequence, there will be multiple changes in traffic flow density, that is, multiple starting traffic waves are generated. The maximum queue length is the position where the starting traffic wave meets the assembling traffic wave, and the traffic flow of the starting traffic wave is greater than that of the assembling traffic wave.

[0077] In one embodiment, the traffic flow of the assembling traffic wave is the upstream stable traffic flow. Determine that the traffic flow of the starting traffic wave is Q qx (x>1), where there is at least one starting traffic wave. The maximum queue starting traffic wave, which is the first traffic wave greater than the upstream stable traffic flow, is Q qj .

[0078] The starting traffic flow Q q is obtained through the microwave vehicle detector at each starting traffic wave.

[0079] Calculate the wave speed of the assembling traffic wave according to the following formula (6):

[0080] (6)

[0081] Among them, , U a is the wave speed of the assembled traffic flow wave, V x is the speed limit of the current section, Q x is the maximum traffic flow of the current road, K j is the jam density.

[0082] The jam density is the traffic flow density under the condition that the traffic flow is completely stationary, considering the safe following distance, and its expression formula (7):

[0083] (7)

[0084] Among them, road_num is the number of lanes, avg_len is the average vehicle length, and safe_gap is the safe following distance.

[0085] According to the linear relationship model of speed - density , among which, , it can be obtained that , then the maximum traffic flow .

[0086] Calculate the wave speed of the starting traffic flow wave according to the following formula (8):

[0087] (8)

[0088] Among them, , U qj is the wave speed of the starting traffic flow wave, Q qj is the traffic flow of the starting traffic flow wave that is greater than the first.

[0089] Let the time from the moment when the starting traffic flow wave meets the assembled traffic flow wave to the accident occurrence moment t0 be t b , then according to formula (9) t b can be expressed as:

[0090] (9)

[0091] Among them, t sj is the time elapsed from the accident occurrence moment t0 to the moment when the starting traffic flow wave is generated.

[0092] The maximum upstream queue position can be as described in formula (10):

[0093] (10)

[0094] Among them, D b is the maximum upstream queue position.

[0095] Determine the maximum queuing position based on the maximum queuing position upstream, and the maximum queuing position is 。

[0096] Step S206, calculate the influence range of the traffic accident based on the maximum queuing length.

[0097] Here, considering that when there is congestion, the overall traffic flow moves forward slowly. When the starting traffic wave meets the end of the queue, the overall congested traffic flow has moved forward a certain distance. Therefore, the accident influence range can be expressed by formula (11):

[0098] (11)

[0099] where t is the time when the starting traffic wave meets the end of the queue, , is the average vehicle speed at the congested position upstream of the accident point, which can be obtained through the microwave vehicle detector upstream of the accident point.

[0100] It can be seen from formula (11) that ,that is, the accident influence range is less than the maximum queuing length upstream.

[0101] Step S104, determine the regulation level of the traffic accident according to the estimated duration and influence range.

[0102] In an embodiment, the step of determining the regulation level of the traffic accident according to the estimated duration and influence range includes:

[0103] Determine whether the traffic accident is a major traffic accident according to the estimated duration.

[0104] Here, if the estimated duration is not less than the preset major accident handling time, determine that the traffic accident is a major traffic accident; otherwise, determine that the traffic accident is a non-major traffic accident.

[0105] Among them, the preset major accident handling time is 3 hours.

[0106] If the traffic accident is a major traffic accident, determine that the regulation level of the traffic accident is level one regulation.

[0107] If the traffic accident is not a major traffic accident, calculate the interval distance from the upstream ramp intersection to the accident point based on the accident location stake number and the stake number of the nearest upstream gate intersection.

[0108] Here, calculate the interval distance from the upstream ramp intersection to the accident point according to formula (1).

[0109] When the influence range is greater than the interval distance, determine that the regulation level is level two regulation.

[0110] When the influence range is less than the interval distance, the control level is determined to be level three control.

[0111] Here, the interval distance is , X si is the mileage of the i-th ramp upstream of the accident point, and i can be set according to the actual situation. For traffic accidents where the duration and severity do not reach those of major traffic accidents, there is no need to directly take mandatory road closure measures, and level two control and level three control support upgrading and downgrading.

[0112] Specifically, when the control level is level two control, all the message boards and broadcasts within the range from the accident point to the first ramp upstream of the upstream accident point are controlled, and information such as "There is a traffic accident ahead, please slow down" is displayed, so as to guide the driver to slow down in advance and prevent secondary accidents from occurring. The speed limit signs within 1 km upstream of the accident point are set to .

[0113] All the message boards and broadcasts from the first ramp upstream of the upstream accident point to the accident influence range are controlled, and information such as "There is a traffic accident ahead, please get off the highway in advance" is displayed, so as to guide the driver to change the travel route and get off the highway in advance to avoid congestion.

[0114] When the control level is level three control, the message boards and broadcasts within the range from the accident point to the first ramp upstream of the upstream accident point are controlled. The message board shows: "There is a traffic accident ahead, please slow down, and the current queue length is ", where is the position of the current agglomerated traffic wave. The speed limit signs within 1 km upstream of the accident point are set to .

[0115] Step S105, according to the accident scenario category and the control level, control the prompt information on the highway prompt equipment to dredge the traffic flow through the prompt information.

[0116] Here, the highway prompt equipment includes message boards, broadcasts, lane indicators, etc. The highway prompt equipment all uses highway mileage to represent.

[0117] The stable traffic flow upstream of the current accident point is Q sa , and the stable traffic flow downstream is Q f (Generally speaking, a major traffic accident means that all lanes are blocked, and the stable traffic flow downstream is generally 0). According to formulas (6) to (11), the influence range of the current accident point can be obtained , and the value of the control range is . Through the mileage of the highway prompt device and formula (1), all highway prompt devices within the regulation range from the current accident point are obtained, and the highway prompt devices are regulated uniformly according to the actual situation, so as to guide the traffic flow through the prompt information.

[0118] Specifically, when the regulation level is the first-level regulation, the toll stations within the upstream regulation range are closed, the ramp lane indicators in the direction of entering this highway within the upstream regulation range are set to the state of "no entry", and the highway information boards in other directions display the information: "A major traffic accident has occurred in the XX direction of the XX Highway. Please detour.", and at the same time, this voice is broadcast. All speed limit signs within the upstream regulation range of the accident point are set with a speed limit of . The first-level regulation cannot change the regulation level. After the accident is over and the road is cleared, the regulation is terminated.

[0119] Figure 5 It is a flow chart after the steps of regulating the prompt information on the highway prompt device according to the accident scenario category and regulation level provided in the first embodiment of the present invention to guide the traffic flow through the prompt information.

[0120] In one embodiment, referring to Figure 5 , after step S105, the method further includes:

[0121] Step S301, at every preset time interval, obtain the real-time upstream stable traffic flow and real-time downstream stable traffic flow sent by multiple microwave vehicle detectors within a preset range of the accident point, and calculate the real-time maximum queue length of the traffic accident according to the real-time upstream stable traffic flow and real-time downstream stable traffic flow.

[0122] Here, the preset time interval can be set according to the actual situation and can be set to 5 minutes.

[0123] Step S302, determine the real-time regulation level of the traffic accident according to the real-time upstream stable traffic flow and the real-time maximum queue length.

[0124] In one embodiment, in step S302, it includes:

[0125] Compare the real-time upstream stable traffic flow with the upstream stable traffic flow, and compare the real-time maximum queue length with the maximum queue length.

[0126] If the real-time upstream stable traffic flow is greater than or equal to the upstream stable traffic flow, and the difference between the real-time maximum queue length and the maximum queue length is greater than or equal to the first preset queue length, determine that the real-time regulation level is the next higher level of the current regulation level.

[0127] Here, the first preset queue length can be set according to the actual situation. If the calculated vehicle queue length does not decrease or even continues to increase within a certain period of time, calculate the accident impact range The number of ramps covered inside. If the accident impact range The number of ramps covered inside keeps increasing, indicating that the driver did not get off the highway in advance as advised by the message board but continuously entered the accident section. Then the regulation level is raised by one level.

[0128] If the real-time upstream stable traffic flow is less than the upstream stable traffic flow, and the difference between the real-time maximum queue length and the maximum queue length is less than the first preset queue length, and the difference between the real-time maximum queue length and the maximum queue length is greater than or equal to the second preset queue length, determine that the real-time regulation level is the current regulation level.

[0129] Here, if the queue length of the traffic flow calculated within a certain period of time decreases significantly, it indicates that the reminders of electromechanical devices such as message boards are effective. Therefore, maintain the current regulation level. Calculate the accident impact range The number of ramps covered. If the number of covered ramps keeps decreasing, the regulation range of the electromechanical device also continuously adjusts with the change of the accident impact range : The electromechanical devices outside the accident impact range exit the secondary regulation, are reset, and return to the state before the accident.

[0130] If the real-time upstream stable traffic flow is less than the upstream stable traffic flow, and the difference between the real-time maximum queue length and the maximum queue length is less than the second preset queue length, determine that the real-time regulation level is the next level of the current regulation level.

[0131] Here, the second preset queue length is the distance of the ramp closest to the accident point. Obtain the number of ramps covered by the accident impact range If the closest ramp is not within the accident impact range it indicates that during the accident duration, the queue length of the traffic flow does not affect the closest ramp, indicating that the accident degree is relatively light and the traffic capacity is still acceptable. Adjust the regulation level to the next level.

[0132] Step S303, when the time interval between the measurement time of the real-time regulation level and the measurement time of the regulation level is less than the preset minimum change time, and the real-time regulation level is different from the regulation level, update the prompt information on the highway prompt device according to the real-time regulation level.

[0133] Here, the preset minimum change time can be set according to the actual situation and can be set to 10 minutes.

[0134] In an embodiment, referring to Figure 6 , after step S105, it further includes:

[0135] Step S401, if the road cleaning completion signal is received, determine that the real-time regulation level is level four regulation, and regulate the highway prompt device according to the preset regulation strategy corresponding to level four regulation.

[0136] Specifically, when the real-time regulation level is level four regulation, operate the information boards and broadcasts within the first ramp upstream of the accident point. The information board displays: "A traffic accident has occurred ahead, please slow down and drive carefully", and the broadcast announces the content displayed on the information board. The speed limit sign remains , and no calculation and display of the queue length are performed anymore.

[0137] Step S402, obtain the stable traffic flow after cleaning downstream of the accident point and the stable traffic flow after cleaning upstream of the accident point.

[0138] Step S403, if the stable traffic flow after cleaning downstream is greater than or equal to the stable traffic flow after cleaning upstream, restore the highway prompt device to the normal state.

[0139] Here, if the stable traffic flow after cleaning downstream is greater than or equal to the stable traffic flow after cleaning upstream, cancel all regulation means, reset the content displayed on the information board, and at the same time turn off the broadcast and reset the speed limit sign to the state before the accident occurred.

[0140] Step S404, if the stable traffic flow after cleaning downstream is less than the stable traffic flow after cleaning upstream, maintain the real-time regulation level at level four regulation until the stable traffic flow after cleaning downstream is greater than or equal to the stable traffic flow after cleaning upstream.

[0141] Specifically, a traffic accident of two vehicles colliding occurred at the location of K100+500 on a three-lane highway. There is a ramp exit at the location of K101 upstream of the accident point. A large amount of debris was generated at the scene, there were injured people, and an ambulance was needed for rescue. Only one lane remained passable on the three lanes.

[0142] The event camera detected the accident and generated the following accident information: Two vehicles collided, could not leave on their own, and needed to be towed by a rescue vehicle. A large amount of debris was generated on the ground, affecting the traffic on other lanes. The number of affected lanes was 2, and the remaining passable lane was 1. The distance from the nearest emergency rescue station to the accident scene was 10 km, and it was estimated that it would take 50 minutes to clean up the scene. Based on the above accident information, the estimated duration of the traffic accident was 90 minutes.

[0143] Determine that the traffic accident is classified as a level two accident according to the accident information.

[0144] The accident level R = 2, the number of affected lanes N = 2, the accident location X0 and the upstream ramp exit X se , and the estimated accident duration t1.

[0145] The distance from the upstream ramp exit to the accident point is: Dse = 500 m.

[0146] Since there is a ramp within 1 km upstream of the accident point, the accident scenario is a traffic accident near the ramp.

[0147] Since this accident is not a major traffic accident, there is no need to directly close the road, and the third-level regulation is adopted by default.

[0148] There are four microwave vehicle detectors at 300 m, 800 m, 1200 m, and 2000 m upstream of the accident point, and the traffic flows read are: Q1 = 3000, Q2 = 3200, Q3 = 2900, Q4 = 3400.

[0149] Set the offset according to the formula in the previous text to 0.1, which corresponds to four weights respectively: , , , .

[0150] So we can get as:

[0151]

[0152] There are two microwave vehicle detectors at 200 m and 500 m downstream of the accident point. The stable traffic flows read downstream are: Q1 = 1900, Q2 = 1800. Therefore, we can get:

[0153]

[0154]

[0155]

[0156] The maximum queue position D can be calculated b :

[0157]

[0158]

[0159] The average speed of the congested position upstream is read as 10 km / h.

[0160] Then the influence range: .

[0161] If this state is maintained until the accident ends, the influence range reaches 4.99 km.

[0162] Because , the accident impact range already includes the first ramp upstream. To prevent the situation from deteriorating and affecting the traffic flow relief function of the first ramp, it is necessary to upgrade the control level to level two. The following controls are implemented:

[0163] (1) Control all information boards and broadcasts within 0.5 kilometers upstream of the accident point to display the text: "Traffic accident ahead, please slow down". This is to guide drivers to slow down in advance and prevent secondary accidents. Set the speed limit sign within 1 kilometer upstream of the accident point to 60 km / h.

[0164] (2) Control all information boards and broadcasts from 0.5 kilometers to 4.99 kilometers upstream of the accident point to display the text: "Traffic accident ahead, please get off the highway in advance". This is to guide drivers to change their travel routes and get off the highway in advance to avoid congestion.

[0165] After implementing the above controls, read the data of 4 microwave vehicle detectors within the upstream range of the accident point every 5 minutes and continuously calculate the impact range .

[0166] After adopting the control measures, assume that the readings of the upstream microwave vehicle detectors are: Q1 = 2000, Q2 = 2100, Q3 = 1800, Q4 = 2400. Similarly, Q can be calculated sa : .

[0167] Since the upstream control does not affect the downstream of the accident point and the accident has not ended, the downstream traffic flow still takes the original value: .

[0168] Calculate D b : .

[0169] It can be seen that compared with the original 4.99 kilometers, the maximum accident queue has been significantly reduced, and the effect of the control is very obvious.

[0170] An embodiment of the present invention provides a method for regulating traffic accidents, including: obtaining accident information and an estimated duration of a traffic accident, as well as traffic flow information within a preset road range at the accident point of the traffic accident; determining the accident scenario category of the traffic accident according to the accident information; the accident scenario category includes ordinary road traffic accidents, traffic accidents near ramps, tunnel traffic accidents, and hub traffic accidents; determining the impact range of the traffic accident according to the traffic flow information; determining the regulation level of the traffic accident according to the estimated duration and the impact range; regulating the prompt information on the highway prompt device according to the accident scenario category and the regulation level, so as to divert the traffic flow through the prompt information. In this way, the method of automatically adjusting the regulation level of traffic accidents through accident information reduces the traffic flow affected by the accident, and further reduces the probability of secondary accidents.

[0171] Embodiment 2:

[0172] Figure 7 It is a schematic diagram of a traffic accident regulation system provided by Embodiment 2 of the present invention.

[0173] Refer to Figure 7 , a traffic accident regulation system, which is applied to a server, and the server is communicatively connected to multiple highway prompt devices; the system includes:

[0174] An accident information acquisition module 1, configured to obtain accident information and an estimated duration of a traffic accident, as well as traffic flow information within a preset road range at the accident point of the traffic accident; the accident information includes accident level, number of affected lanes, accident location stake number, and the stake number of the nearest upstream ramp intersection.

[0175] An accident scenario determination module 2, configured to determine the accident scenario category of the traffic accident according to the accident information; the accident scenario category includes ordinary road traffic accidents, traffic accidents near ramps, tunnel traffic accidents, and hub traffic accidents.

[0176] An impact range determination module 3, configured to determine the impact range of the traffic accident according to the traffic flow information.

[0177] A regulation level determination module 4, configured to determine the regulation level of the traffic accident according to the estimated duration and the impact range.

[0178] A regulation and traffic diversion module 5, configured to regulate the prompt information on the highway prompt device according to the accident scenario category and the regulation level, so as to divert the traffic flow through the prompt information.

[0179] An embodiment of the present invention provides a traffic accident regulation system, including: obtaining accident information and estimated duration of a traffic accident, as well as traffic flow information within a preset road range at the accident point of the traffic accident; determining the accident scenario category of the traffic accident according to the accident information; the accident scenario category includes general road traffic accidents, traffic accidents near ramps, tunnel traffic accidents, and hub traffic accidents; determining the impact range of the traffic accident according to the traffic flow information; determining the regulation level of the traffic accident according to the estimated duration and the impact range; regulating the prompt information on the highway prompt device according to the accident scenario category and the regulation level, so as to divert the traffic flow through the prompt information. In this way, the method of automatically adjusting the regulation level of a traffic accident through accident information reduces the traffic flow affected by the accident, and further reduces the probability of secondary accidents.

[0180] An embodiment of the present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps of the traffic accident regulation method provided in the above embodiment are implemented.

[0181] An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is run by a processor, the steps of the traffic accident regulation method in the above embodiment are executed.

[0182] The computer program product provided by the embodiment of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the foregoing method embodiments. For specific implementation, reference can be made to the method embodiments, and details are not described herein again.

[0183] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described system and device can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

[0184] In addition, in the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0185] When the above-mentioned functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs.

[0186] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0187] Finally, it should be noted that the above-mentioned embodiments are only specific implementation manners of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions described in the foregoing embodiments, or can easily think of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A method for regulating traffic accidents, characterized in that, Applied to a server, the server is communicatively connected to a plurality of highway prompting devices; the method includes: Obtain the accident information and estimated duration of a traffic accident, as well as the traffic flow information within a preset road range at the accident point of the traffic accident; the accident information includes the accident level, the number of affected lanes, the accident location stake number, and the stake number of the nearest upstream ramp entrance; Determine the accident scenario category of the traffic accident according to the accident information; the accident scenario categories include ordinary road traffic accidents, traffic accidents near ramps, tunnel traffic accidents, and hub traffic accidents; Determine the impact range of the traffic accident according to the traffic flow information; Determine the regulation level of the traffic accident according to the estimated duration and the impact range; Regulate the prompt information on the highway prompting device according to the accident scenario category and the regulation level, so as to guide the traffic flow through the prompt information; After the step of regulating the prompt information on the highway prompting device according to the accident scenario category and the regulation level to guide the traffic flow through the prompt information, the method further includes: Every preset time interval, obtain the real-time upstream stable traffic flow and real-time downstream stable traffic flow sent by a plurality of microwave vehicle detectors within a preset range of the accident point, and calculate the real-time maximum queue length of the traffic accident according to the real-time upstream stable traffic flow and the real-time downstream stable traffic flow; Determine the real-time regulation level of the traffic accident according to the real-time upstream stable traffic flow and the real-time maximum queue length; When the time interval between the measurement time of the real-time regulation level and the measurement time of the regulation level is less than a preset minimum change time, and the real-time regulation level is different from the regulation level, update the prompt information on the highway prompting device according to the real-time regulation level.

2. The traffic accident regulation method according to claim 1, characterized in that, The step of determining the accident scenario category of the traffic accident according to the accident information includes: Determine the accident point location of the traffic accident according to the accident location stake number; Judge whether the accident point location is in a tunnel. If so, determine the accident scenario category of the traffic accident as the tunnel traffic accident; Judge whether there is a hub within a unit length section upstream of the accident point. If so, determine the accident scenario category of the traffic accident as the hub traffic accident; Judge whether there is a ramp within a unit length section upstream of the accident point. If so, determine the accident scenario category of the traffic accident as the traffic accident near the ramp; if not, determine the accident scenario category of the traffic accident as the ordinary road traffic accident.

3. The traffic accident control method according to claim 2, wherein The step of determining the impact range of the traffic accident according to the traffic flow information includes: Obtain the upstream traffic flow sent by a plurality of the microwave vehicle detectors within a first preset range upstream of the accident point of the traffic accident to obtain traffic flow information; Obtain the downstream traffic flow sent by a plurality of the microwave vehicle detectors within a second preset range downstream of the accident point to obtain traffic flow information; Calculate the upstream stable traffic flow of the accident point based on the upstream traffic flow; Calculate the downstream stable traffic flow at the accident point based on the downstream traffic volume; Calculate the maximum queue length of the traffic accident based on the upstream stable traffic flow, the downstream stable traffic flow, and the estimated duration; Calculate the influence range of the traffic accident based on the maximum queue length; 4. The traffic accident control method according to claim 3, characterized in that The step of determining the regulation level of the traffic accident according to the estimated duration and the influence range includes: Determine whether the traffic accident is a major traffic accident according to the estimated duration; If the traffic accident is a major traffic accident, determine that the regulation level of the traffic accident is level-one regulation; If the traffic accident is not a major traffic accident, calculate the interval distance from the upstream ramp to the accident point based on the accident location stake number and the nearest upstream ramp stake number; When the influence range is greater than the interval distance, determine that the regulation level is level-two regulation; When the influence range is less than the interval distance, determine that the regulation level is level-three regulation; 5. The traffic accident control method according to claim 4, characterized in that, The step of determining whether the traffic accident is a major traffic accident according to the estimated duration includes: If the estimated duration is not less than the preset major accident handling time, determine that the traffic accident is the major traffic accident; otherwise, determine that the traffic accident is a non-major traffic accident; 6. The traffic accident control method according to claim 4, characterized in that, The step of determining the real-time regulation level of the traffic accident according to the real-time upstream stable traffic flow and the real-time maximum queue length includes: Compare the real-time upstream stable traffic flow with the upstream stable traffic flow, and compare the real-time maximum queue length with the maximum queue length; If the real-time upstream stable traffic flow is greater than or equal to the upstream stable traffic flow, and the difference between the real-time maximum queue length and the maximum queue length is greater than or equal to the first preset queue length, determine that the real-time regulation level is the level above the current regulation level; If the real-time upstream stable traffic flow is less than the upstream stable traffic flow, and the difference between the real-time maximum queue length and the maximum queue length is less than the first preset queue length, and the difference between the real-time maximum queue length and the maximum queue length is greater than or equal to the second preset queue length, determine that the real-time regulation level is the current regulation level; If the real-time upstream stable traffic flow is less than the upstream stable traffic flow, and the difference between the real-time maximum queue length and the maximum queue length is less than the second preset queue length, determine that the real-time regulation level is the level below the current regulation level; 7. The traffic accident control method according to claim 4, characterized in that After the step of regulating the prompt information on the highway prompt device according to the regulation level to guide the traffic flow through the prompt information, the method further includes: If a road cleaning completed signal is received, determine that the real-time regulation level is level-four regulation, and regulate the highway prompt device according to the preset regulation strategy corresponding to the level-four regulation; Obtain the downstream stable traffic flow after cleaning and the upstream stable traffic flow after cleaning at the accident point; If the downstream stable traffic flow after cleaning is greater than or equal to the upstream stable traffic flow after cleaning, restore the highway prompt device to the normal state; If the stable traffic flow after downstream cleaning is less than the stable traffic flow after upstream cleaning, maintain the real-time regulation level at the fourth-level regulation until the stable traffic flow after downstream cleaning is greater than or equal to the stable traffic flow after upstream cleaning.

8. A traffic accident regulation system for implementing the method according to any one of the above claims 1-7, characterized in that, Applied to a server, the server is communicatively connected to a plurality of highway prompting devices; the system includes: An accident information acquisition module, configured to acquire accident information and an estimated duration of a traffic accident, as well as traffic flow information within a preset road range at the accident point of the traffic accident; the accident information includes an accident level, the number of affected lanes, an accident location stake number, and a stake number of the nearest upstream ramp entrance. An accident scenario determination module, configured to determine an accident scenario category of the traffic accident according to the accident information; the accident scenario category includes an ordinary road traffic accident, a traffic accident near a ramp, a tunnel traffic accident, and a hub traffic accident. An influence range determination module, configured to determine an influence range of the traffic accident according to the traffic flow information. A regulation level determination module, configured to determine a regulation level of the traffic accident according to the estimated duration and the influence range. A regulation and diversion of traffic flow module, configured to regulate prompt information on the highway prompting devices according to the accident scenario category and the regulation level, so as to divert traffic flow through the prompt information.

9. An electronic device, comprising a memory and a processor, wherein a computer program capable of running on the processor is stored on the memory, characterized in that, When the processor executes the computer program, the method described in any one of the above claims 1-7 is implemented.

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