CN111768626A - Sound-light-electricity-integrated active highway risk early warning system - Google Patents
Sound-light-electricity-integrated active highway risk early warning system Download PDFInfo
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- CN111768626A CN111768626A CN202010644920.2A CN202010644920A CN111768626A CN 111768626 A CN111768626 A CN 111768626A CN 202010644920 A CN202010644920 A CN 202010644920A CN 111768626 A CN111768626 A CN 111768626A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
- G08G1/0116—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from roadside infrastructure, e.g. beacons
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/161—Decentralised systems, e.g. inter-vehicle communication
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Abstract
The invention relates to an active expressway risk early warning system integrating sound, light and electricity, which comprises an intelligent sensing system and an intelligent roadside terminal, wherein the intelligent roadside terminal is used for analyzing and processing vehicle state information issued by the intelligent sensing system; further comprising: the risk early warning system is connected with the intelligent roadside terminal; the risk early warning system comprises a sound early warning module, a light early warning module and an electric early warning module, wherein the sound early warning module, the light early warning module and the electric early warning module are used for giving early warning prompts to the vehicle drivers with risk behaviors and the vehicle drivers behind the vehicle drivers from three angles of sound, light and electricity according to analysis processing results sent by the intelligent roadside terminal. The invention effectively combines three methods of sound, light and electricity in the technical field of traffic safety, combines traffic behavior prediction analysis, can quickly and accurately issue early warning information, and effectively reduces the road traffic risk and the incidence rate of secondary accidents.
Description
Technical Field
The invention relates to the technical field of traffic safety, in particular to an active highway risk early warning system integrating sound, light and electricity.
Background
In recent years, along with the increasing demand of people for travel and transportation, the utilization rate of expressways is greatly improved. Compared with other roads, the highway has complex road conditions and faster speed, and even smaller traffic behavior risks can cause larger traffic accidents. Particularly, in typical road sections such as long downhill slopes, sharp turns, tunnels, bridges and the like, the traffic accident level is often higher under the influence of road linear characteristics and environmental characteristics. Taking the traffic risk occurrence process of the road on the long downhill section as an example, in the long downhill section, the vehicle needs to be continuously braked with large intensity for a long time, and the heavy braking heat load is easy to cause the heat recession of the brake, thereby causing traffic risk, causing great casualties and economic loss, and seriously affecting the traffic safety of the expressway. Therefore, how to improve the traffic safety of the highway, ensure the safety and smoothness of the road, and fully play the important role of the highway in the social development has become an important subject of wide attention of traffic management departments and social circles.
There are many studies on the risk of highway operation, however, there are many problems in the existing studies, such as: 1) the early warning effectiveness and pertinence to the high-speed moving target vehicle are not sufficient because the active following early warning is not carried out according to the vehicle motion information; 2) the early warning method is single, the pertinence and the effectiveness are not strong, and misjudgment of the driver on the early warning information is possibly caused; 3) the early warning measure only aims at overspeed dangerous vehicles, influence of the dangerous vehicles on vehicles around and behind is not considered, and the application of the early warning measure has certain limitation.
Disclosure of Invention
Aiming at the problems that the prior highway has single early warning mode of vehicle risk traffic behavior, weak pertinence and no consideration of vehicle state information in the early warning process, and finally influences the early warning effectiveness, the invention aims to provide an active highway risk early warning system integrating sound collection, light and electricity by matching the early warning modes of a high pitch horn array (sound), a laser emitter array (light), a variable information board array (electricity) and the like and combining an intelligent sensing system and intelligent roadside terminal equipment, thereby improving the effectiveness of traffic risk early warning.
In order to achieve the purpose, the invention adopts the following technical scheme: an active highway risk early warning system integrating sound, light and electricity comprises an intelligent sensing system and an intelligent road side terminal, wherein the intelligent road side terminal is used for analyzing and processing vehicle state information issued by the intelligent sensing system; it still includes: the risk early warning system is connected with the intelligent roadside terminal; the risk early warning system comprises a sound early warning module, an optical early warning module and an electric early warning module, wherein the sound early warning module, the optical early warning module and the electric early warning module are used for giving early warning prompts to vehicle drivers with risk behaviors and rear vehicle drivers from three angles of sound, light and electricity by utilizing early warning information of sound, light and characters according to analysis processing results sent by the intelligent roadside terminal.
Furthermore, the sound early warning module comprises a sound early warning control module and a directional tweeter array formed by a plurality of directional tweeters, and the sound early warning control module is used for generating a sound early warning control signal according to the position and the running speed information of a target vehicle with dangerous traffic behaviors and sending the sound early warning control signal to the directional tweeter array; the directional tweeter array performs regular whistling in long-short tone matching on two sides of a cab of the target vehicle according to the sound early warning control signal, so that active following early warning of dangerous vehicles is realized; meanwhile, traffic behavior risk categories and risk levels are distinguished in a whistle mode with different long and short tones matched with each other.
Further, each of the directional tweeters in the directional tweeter array is disposed equidistantly on both sides of the road.
Furthermore, the electric early warning module comprises an electric early warning control module and a variable information board array formed by a plurality of variable information boards, and the electric early warning control module is used for displaying abnormal behavior information in the variable information board in front of the target vehicle and giving corresponding prevention and control measures according to the position and the running speed of the target vehicle when the vehicle is found to have dangerous traffic behaviors so as to cooperate with the sound early warning module to carry out early warning prompt on the target vehicle; meanwhile, the safe vehicle speed and the safe vehicle distance information are calculated and issued in time in combination with the road traffic information, and information display is carried out in the variable information board behind the target vehicle for reminding a driver of the vehicle behind to adjust the driving behavior.
Further, each variable information board in the variable information board array is equidistantly arranged on one side of the road.
Furthermore, the light early warning module comprises a light early warning control module and a laser emitter array formed by a plurality of laser emitters, and the light early warning control module is used for matching with the sound early warning module and the electric early warning module when the vehicle is found to have dangerous traffic behaviors, combining the movement speed and the position information of the target vehicle, and carrying out early warning prompt on the current target vehicle by controlling the laser emitters on two sides of a cab of the target vehicle to flicker in real time; meanwhile, after an accident occurs, the laser emitter array behind the accident is controlled to be matched with the electric information early warning module so as to realize early warning prompt of vehicles behind the accident.
Further, after an accident occurs, control a rear of accident the laser emitter array with variable information tablet array cooperatees to when the early warning suggestion to the rear vehicle is realized, include: controlling the laser emitter within a first preset range behind the primary accident, and forming laser light curtains in different driving roads to form a stop character; and controlling all the laser transmitters within a second preset range behind the primary accident to light red lamps, and matching with the electric information early warning module to carry out early warning prompt on rear vehicles, so that the rear vehicles can master the traffic information of the front road in time.
Further, the first preset range is 10-20 m, and the second preset range is 300-500 m.
Further, all laser generators in the laser emitter array are arranged on two sides of the road at equal intervals.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the invention utilizes the complementary advantages of the tweeter array (sound), the laser emitter array (light) and the variable information board array (electricity), combines the traffic behavior prediction and analysis of an intelligent sensing system and an intelligent roadside terminal in the running process of the vehicle, references the speed and the position information of the risky vehicle, and carries out continuous, effective and active following early warning on the risky vehicle, the vehicle behind the risky vehicle and the like in a targeted manner from multiple angles, thereby better improving the effectiveness of the early warning of the risky traffic behavior, reducing the occurrence probability of traffic accidents and improving the traffic safety of highways; 2. the intelligent road side terminal can predict and analyze the future driving state of the target vehicle according to the motion track of the target vehicle, and timely issues early warning information in cooperation with a risk early warning system, so that the early warning efficiency is improved. 3. According to the directional tweeter queue, the directional tweeters can actively and sequentially whistle along with the running speed of the target vehicle according to the running state information of the target vehicle, so that early warning prompt sounds surround the two sides of a cab of the target vehicle all the time, misjudgment of a driver on information can be effectively reduced, and the early warning target is strong; 4. the laser emitter array can actively follow the running speed of the target vehicle according to the running state information of the vehicle, sequentially control laser flicker on two sides of a cab of the target vehicle, make up the target vehicle which ignores a whistle signal due to good sound insulation effect, and improve the effectiveness of early warning; 5. the laser emitter array can give early warning prompts to rear vehicles in a laser flashing or red light lighting mode according to current traffic information, so that the possibility of secondary accidents is reduced; 6. the variable information board array can control the similar variable information boards to update and release the early warning information in time according to the running position and the running speed of the target vehicle, make up the problem of unclear early warning objects caused by overlarge traffic flow, and further improve the effectiveness of the early warning mode. Therefore, the invention can be widely applied to the technical field of traffic safety.
Drawings
FIG. 1 is a schematic diagram of the general structure of an active highway risk early warning system integrating sound collection, light collection and electricity;
FIG. 2 is a perspective view of an embodiment I of the active highway risk early warning system integrating sound, light and electricity;
fig. 3 is a sound-light-electricity integrated active highway risk early warning system embodiment II of the present invention.
The components in the figure are labeled as follows: 1. an intelligent sensing system; 2. an intelligent roadside terminal; 3. a tweeter array; 4. a variable information tag array; 5. an array of laser emitters; 6. a control bus; i-1, accident vehicle; i-2, a laser light curtain; i-3, rear warning information; II-1, a vehicle at risk; II-2, early warning and warning information.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1, the active highway risk early warning system integrating sound collection, light collection, electricity collection and integration provided by the invention comprises an existing intelligent sensing system 1, an existing intelligent roadside terminal 2 and a risk early warning system. The intelligent sensing system 1 is used as a risk traffic behavior detection port and is mainly used for detecting road vehicle state information and sending the detected road vehicle state information to the intelligent road side terminal 2; the intelligent road side terminal 2 is used as a data processing and early warning equipment control center and is mainly used for analyzing and processing road vehicle state information issued by the intelligent sensing system 1 and issuing control information to the risk early warning system according to an analysis result; the risk early warning system is a bottom layer execution module and is mainly used for controlling early warning equipment according to control information sent by the intelligent roadside terminal 2, and early warning prompt of risk vehicles is achieved. Specifically, the risk early warning system comprises a sound early warning module, a light early warning module and an electric early warning module, wherein the sound early warning module, the light early warning module and the electric early warning module are used for giving early warning prompts to the vehicle driver with the risk behavior and the rear vehicle driver from three angles of sound, light and electricity by utilizing the early warning information of sound, light and characters according to the analysis processing result sent by the intelligent roadside terminal.
As a preferred embodiment, the sound early warning module comprises a sound early warning control module and a directional tweeter array formed by a plurality of directional tweeters, wherein the sound early warning control module is used for generating a sound early warning control signal according to the position and the running speed information of a target vehicle with dangerous traffic behaviors and sending the sound early warning control signal to the directional tweeter array; the directional tweeter array performs regular whistling of long and short tone matching on two sides of a cab of a target vehicle with dangerous traffic behaviors according to the sound early warning control signal, so that active follow-up early warning of dangerous vehicles is realized; meanwhile, traffic behavior risk categories and risk levels are distinguished in a whistle mode with different long and short tones matched with each other.
As a preferred embodiment, each directional tweeter in the directional tweeter array is disposed equidistantly on both sides of the road, and the directional tweeters are arranged continuously according to the requirement of continuous loudness and timbre.
As a preferred embodiment, the electric warning module includes an electric warning control module and a variable information board array composed of a plurality of variable information boards. The electric early warning control module is used for sending an electric early warning control signal to the variable information board array when the vehicle is found to have dangerous traffic behaviors, and particularly, according to the position and the running speed of a target vehicle, abnormal behavior information of the target vehicle is displayed in the variable information board in front of the target vehicle and corresponding prevention and control measures are given out so as to cooperate with the directional tweeter array to give early warning prompt to the target vehicle; meanwhile, the safe vehicle speed and the safe vehicle distance information are calculated and issued in time in combination with the road traffic information, and information is displayed in a variable information board behind the target vehicle for reminding a driver of the rear vehicle to adjust the driving behavior.
As a preferred embodiment, the variable information board array is composed of a plurality of variable information boards equidistantly arranged on one side of the road.
As a preferred embodiment, the light early warning module comprises a light early warning control module and a laser emitter array formed by a plurality of laser emitters. The light early warning control module is used for sending a control instruction to the laser emitter array when the vehicles are found to have dangerous traffic behaviors, combining the directional tweeter array and the variable information board array, combining information such as the movement speed and the position of a target vehicle, and carrying out early warning prompt on the current abnormal vehicles by controlling the laser emitters on the two sides of the cab to flicker in real time; meanwhile, after a primary accident occurs, controlling a laser emitter 10-20 m behind the primary accident to form laser light curtains in different driving roads to form a stop word; in addition, all laser transmitters at positions 300-500 m behind the primary accident are controlled to light red lamps, and the variable information board is matched to give early warning prompts to vehicles behind, so that the vehicles behind can master the traffic information of the front road in time.
As a preferred embodiment, the laser generators in the laser emitter array are arranged equidistantly on both sides of the road.
As a preferred embodiment, the intelligent sensing system is orderly arranged above the road or on two sides of the road and mainly comprises a camera, a radar, an infrared sensing device and the like. The vehicle state information collected by the intelligent perception system comprises: vehicle type, driving speed, position, driving lane, interactive vehicle information, road section traffic characteristic information and the like.
As a preferred embodiment, a traffic behavior prediction analysis module, a sound early warning module, a light early warning module and an electric early warning module are arranged in the intelligent road side terminal, wherein the traffic behavior prediction analysis module is used for identifying and predicting risks of abnormal traffic behaviors according to vehicle state information sent by the intelligent sensing system and sending analysis prediction results to other early warning modules; the sound early warning module, the light early warning module and the electric early warning module are respectively used for sending a sound early warning control signal, a light early warning control signal and an electric early warning control signal to the risk early warning system according to the analysis prediction result sent by the traffic behavior prediction analysis module, and the risk early warning system gives an early warning prompt to a driver with risk traffic behavior. In the practical application process, the intelligent roadside terminal is sequentially arranged on two sides of a road according to the equipment processing capacity and the installation position of the intelligent sensing system.
Examples
Compared with other common road sections, the accident occurrence probability of the long downhill road section is obviously higher, and the accident grade is higher. The reason for the generation is analyzed in detail, and the most important is the vehicle self-factors, particularly the vehicle brake heat fading phenomenon caused by the overhigh temperature of the brake hub in the downhill process. Two embodiments of the present invention will be described below by taking a long downhill road as an example. The slope i of the long downhill road is 3%, and the length L is 20 km.
As shown in fig. 1, the active highway risk early warning system integrating sound collection, light collection, electricity collection and integration provided by the invention comprises an intelligent sensing system 1, an intelligent roadside terminal 2 and a risk early warning system. The risk early warning system comprises a directional tweeter array 3, a variable information board array 4 and a laser emitter array 5.
As shown in fig. 2, in embodiment I, when a traffic accident occurs on a long downhill road, the intelligent sensing system 1 detects the position of an accident vehicle I-1 and transmits information to the intelligent roadside terminal 2, the intelligent roadside terminal 2 controls the laser emitter array 5 at a position 10-20 m behind the intelligent roadside terminal to interact according to the accident location to form a laser light curtain I-2, and displays a stop word, thereby realizing traffic control on vehicles behind the accident; meanwhile, controlling the laser emitter array 5 at the position 300-500 m behind the accident site to display red color, and warning that an accident exists in front of a vehicle behind and paying attention to slow walking; in addition, the variable information board array 4 is controlled to timely release the front accident information I-3 at different distances, and meanwhile, the rear vehicle is warned to keep the distance between vehicles and the like by paying attention to the running speed.
As shown in fig. 3, in the embodiment II, the vehicle II-1 which has abnormal running and running risk (such as excessive brake drum temperature, excessive speed, etc.) on the long downhill road takes the brake hub temperature as an example. The intelligent sensing system 1 detects temperature information, vehicle speed information and vehicle position information of brake hubs of vehicles on a long downhill road in real time and sends the information to the intelligent road side terminal 2 in time; the intelligent road side terminal 2 carries out predictive analysis on the brake hub temperature of the target vehicle II-1 according to the vehicle state information issued by the intelligent sensing system 1; when the intelligent roadside terminal analyzes that the target vehicle II-1 has the possibility of brake failure, the intelligent roadside terminal issues an early warning control instruction in time and controls an early warning control system (a directional tweeter array 3, a laser emitter array 5 and a variable information board array 4) through a control bus 6; the high pitch horn array 3 is controlled according to the running position and speed of the vehicle, environmental information and surrounding vehicle information, the volume and the tone are adjusted, regular long and short sound whistles are emitted, and sound surrounding effects are formed on two sides of a driving cab of the target vehicle II-1, so that a warning effect is achieved; meanwhile, the laser emitter arrays 5 on the two sides of the cab are controlled to flicker according to the information of the running position, the speed and the like of the target vehicle II-1, so that the defect that the warning information related to the tweeter queue 3 cannot be timely transmitted to the driver due to the fact that the target vehicle II-1 has good sound insulation is overcome; in addition, in order to improve the intuitiveness of the warning information, the variable information board 4 in front of the target vehicle II-1 is controlled to display the existing risk information II-2 according to the position of the target vehicle, such as 'Jing X. xxxx brake temperature is too high, please stop at the side to correct'. In order to reduce the possibility of secondary accidents, the information of the rear variable information board 4 is changed in real time according to the risk level of the target vehicle II-1, for example, the distance between the vehicles is kept at 200m when the vehicle is abnormal at the front 1km, so that the function of early warning and prompting is achieved.
The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.
Claims (9)
1. An active highway risk early warning system integrating sound, light and electricity comprises an intelligent sensing system and an intelligent road side terminal, wherein the intelligent road side terminal is used for analyzing and processing vehicle state information issued by the intelligent sensing system; it is characterized by also comprising:
the risk early warning system is connected with the intelligent roadside terminal;
the risk early warning system comprises a sound early warning module, an optical early warning module and an electric early warning module, wherein the sound early warning module, the optical early warning module and the electric early warning module are used for giving early warning prompts to vehicle drivers with risk behaviors and rear vehicle drivers from three angles of sound, light and electricity by utilizing early warning information of sound, light and characters according to analysis processing results sent by the intelligent roadside terminal.
2. The active highway risk early warning system integrating sound collection, light and electricity as claimed in claim 1, wherein the sound early warning module comprises a sound early warning control module and a directional tweeter array consisting of a plurality of directional tweeters, the sound early warning control module is used for generating a sound early warning control signal according to the position and the running speed information of a target vehicle with the risk traffic behavior and sending the sound early warning control signal to the directional tweeter array; the directional tweeter array performs regular whistling in long-short tone matching on two sides of a cab of the target vehicle according to the sound early warning control signal, so that active following early warning of dangerous vehicles is realized; meanwhile, traffic behavior risk categories and risk levels are distinguished in a whistle mode with different long and short tones matched with each other.
3. An active highway risk early warning system integrating sound collection, light and electricity as claimed in claim 2 wherein each directional tweeter in the array of directional tweeters is positioned equidistantly on both sides of the road.
4. The active highway risk early warning system integrating sound collection, light collection and electricity integration as claimed in claim 1, wherein the electric early warning module comprises an electric early warning control module and a variable information board array consisting of a plurality of variable information boards, and the electric early warning control module is used for displaying abnormal behavior information in the variable information board in front of a target vehicle and giving corresponding prevention and control measures according to the position and the running speed of the target vehicle when the vehicle is found to have a dangerous traffic behavior so as to cooperate with the sound early warning module to give early warning prompt to the target vehicle; meanwhile, the safe vehicle speed and the safe vehicle distance information are calculated and issued in time in combination with the road traffic information, and information display is carried out in the variable information board behind the target vehicle for reminding a driver of the vehicle behind to adjust the driving behavior.
5. The active highway risk early warning system integrating sound collection, light collection and electricity integration as claimed in claim 4, wherein each variable information board in the variable information board array is equidistantly arranged on one side of a road.
6. The active highway risk early warning system integrating sound collection, light, electricity and integration as claimed in claim 1, wherein the light early warning module comprises a light early warning control module and a laser emitter array formed by a plurality of laser emitters, the light early warning control module is used for matching with the sound early warning module and the electricity early warning module when the vehicles are found to have the risk traffic behaviors, and combining the movement speed and the position information of the target vehicle, and carrying out early warning prompt on the current target vehicle by controlling the laser emitters on two sides of a cab of the target vehicle to flicker in real time; meanwhile, after an accident occurs, the laser emitter array behind the accident is controlled to be matched with the electric information early warning module so as to realize early warning prompt of vehicles behind the accident.
7. The active highway risk early warning system integrating sound collection, light collection and electricity integration as claimed in claim 6, wherein the laser emitter array and the variable information board array which are used for controlling the rear part of an accident to be matched with each other after the accident happens so as to realize early warning prompt for the rear vehicle comprise: controlling the laser emitter within a first preset range behind the primary accident, and forming laser light curtains in different driving roads to form a stop character; and controlling all the laser transmitters within a second preset range behind the primary accident to light red lamps, and matching with the electric information early warning module to carry out early warning prompt on rear vehicles, so that the rear vehicles can master the traffic information of the front road in time.
8. The active highway risk early warning system integrating sound collection, light collection and electricity integration according to claim 7, wherein the first preset range is 10-20 m, and the second preset range is 300-500 m.
9. The active highway risk early warning system integrating sound collection, light and electricity as claimed in claim 6, wherein the laser generators in the laser emitter array are arranged on two sides of the road at equal intervals.
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| CN113516849A (en) * | 2021-09-13 | 2021-10-19 | 浙江高速信息工程技术有限公司 | Directional tweeter control method and device for expressway and server |
| CN113516848A (en) * | 2021-09-09 | 2021-10-19 | 浙江高速信息工程技术有限公司 | Directional tweeter control method and system applied to expressway |
| CN113702963A (en) * | 2021-09-24 | 2021-11-26 | 河南交投通汇高速公路有限责任公司 | Road early warning method and device based on vision and microwave detection and electronic equipment |
| CN114973768A (en) * | 2022-05-17 | 2022-08-30 | 重庆文理学院 | Road traffic risk early warning method and system based on driving safety field |
| CN115206053A (en) * | 2022-06-02 | 2022-10-18 | 河南越秀尉许高速公路有限公司 | Low-false-alarm-rate early warning method for expressway construction area |
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| CN115359673A (en) * | 2022-08-07 | 2022-11-18 | 贵州黔三智科技有限公司 | Highway potential safety hazard early warning method based on laser lamp linkage |
| CN115387259A (en) * | 2022-08-26 | 2022-11-25 | 重庆交通大学 | Traffic flow control system and method for emergency and storage medium |
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