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1453results about "Road signs" patented technology

Modularized bridge pier anti-collision system and intelligent monitoring method thereof

The invention relates to a modularized bridge pier anti-collision system which comprises an anti-collision device and an intelligent monitoring device, and the anti-collision device is an annular protection body formed by splicing a plurality of prefabricated anti-collision plates and fixed to the circumferential face of a bridge pier in a surrounding mode. The prefabricated anti-collision plate comprises a composite inner core formed by stacking a plurality of layers of honeycomb energy dissipation core plates, and the density of the honeycomb energy dissipation core plates is gradually increased from the outer side to the inner side. The intelligent monitoring device comprises a sensor array, a storage battery, a charging and discharging controller, a data processing module, a wireless communication module and a remote monitoring center. The sensor array is a force sensor embedded in the center of a polyurethane buffer gasket on the inner side of the prefabricated anti-collision plate. The detection method comprises the steps that when the pier is collided, the sensor array is triggered, data information is collected in real time, a data packet is sent to the remote monitoring center through the wireless communication module, and the collision position and the damage condition of the pier are automatically monitored. The structure is efficient in disassembly and assembly, convenient to maintain and high in anti-collision adaptability, full-life monitoring of the bridge pier is achieved, and the protection performance is improved.
Owner:NINGBO CONSTR ENG GROUP

Intelligent modular guardrail and control method thereof

The invention relates to the technical field of intelligent guardrails, solves the problem that a modular guardrail in the prior art lacks comprehensive monitoring and unified power supply, and provides an intelligent modular guardrail. The guardrail comprises at least two guardrail stand columns and a connecting rod structure arranged between the stand columns, each guardrail stand column comprises a stand column base and a stand column body, and a mounting groove is formed in the side face of each stand column body; the connecting rod structure is detachably connected with the stand column body through a connecting structural part. The top of the stand column body is provided with a power module, the power module comprises a photovoltaic panel, a first energy storage unit and a wireless displacement vibration unit, the photovoltaic panel is electrically connected with the first energy storage unit, and the first energy storage unit is electrically connected with the wireless displacement vibration unit; the stand column body further comprises an imaging module, and the imaging module comprises a second energy storage unit and an imaging unit. The modularized guardrail has the advantages of being convenient to install and maintain, stable in energy supply and capable of achieving real-time monitoring.
Owner:DONGHUA UNIV

Autonomous moving traffic cone robot and control method

The invention discloses an autonomous moving traffic cone robot and a control method, and belongs to the technical field of traffic cone robots. A traffic cone robot capable of moving autonomously comprises a base, an inflatable traffic cone cover is installed on the base, an inflation cavity is formed between the traffic cone cover and the base, the outer wall of the traffic cone cover is coated with reflective paint, a guide shaft and an inflation assembly are arranged on the base, and the guide shaft is used for guiding the expansion direction of the traffic cone cover. The inflating assembly is used for inflating and deflating the inflating cavity; through the design of the inflatable traffic cone cover, the traffic cone cover can be contracted after being deflated, the equipment size is greatly reduced, the single-time transportation number is increased, and the transportation cost is reduced; by means of the synergistic effect of the guide shaft and the inflation assembly, the expansion direction of the traffic cone cover can be accurately controlled, and day-and-night efficient warning is achieved in cooperation with outer wall reflective paint and built-in LED lamp beads; the buffering air bag on the outer wall of the base is communicated with the inflation cavity and can rapidly expand to form protection when being impacted, and the equipment damage risk is reduced.
Owner:PIZHOU ZHITONG INTELLIGENT EQUIPMENT CO LTD

Intelligent traffic risk early warning device and method

The invention relates to the technical field of road early warning, and discloses an intelligent traffic risk early warning device and method.The intelligent traffic risk early warning device comprises a vehicle type recognition module, a vehicle meeting conflict judgment module and a conflict isolation protection module, the vehicle type recognition module recognizes and collects vehicle images through a YOLOv7 method based on fusion CBAM enhancement, outputs various kinds of information of vehicles passing through a curve, and sends the information to the collision isolation protection module; the collision isolation and protection module is used for receiving a collision signal and outputting the collision signal to the meeting collision judgment module, establishing a summarized data set of meeting actual conditions and executing a meeting safety control method, and the collision isolation and protection module is used for controlling the lifting of a plurality of flexible warning columns arranged at the entrances of the curves on the two sides based on the meeting collision judgment module. According to the device, the minimum vehicle turning radius is dynamically calculated in combination with the vehicle meeting conflict judgment module and compared with the same type of a vehicle meeting critical model, and signal early warning dynamic isolation dual protection is matched, so that the problems that a traditional convex mirror depends on subjective judgment of a driver, and an existing early warning device is manually operated and poor in environmental adaptability are solved; and the safety of vehicle meeting at the mountain road curve is improved.
Owner:KUNMING UNIV OF SCI & TECH

Expressway traffic diversion device

ActiveCN224047968UTraffic signalsRoad signsTraffic diversionStructural engineering
The utility model provides an expressway traffic diversion device which comprises a fixed base, supporting columns fixedly connected to the two sides of the top of the fixed base, and a warning board fixedly connected to the tops of the supporting columns, and is characterized in that an LED lamp screen is fixedly connected to the top of the warning board, a mounting plate is fixedly connected to the surface of the bottom of the fixed base, and the LED lamp screen is fixedly connected to the mounting plate. An anti-impact assembly is fixedly connected to the surface of the mounting plate, an anti-collision assembly is fixedly connected to one end of the anti-impact assembly, the anti-impact assembly can be in linkage with the anti-collision assembly, the anti-collision assembly prevents the whole device from being influenced by slight collision through the structure of the anti-collision assembly, and meanwhile when a vehicle running at a high speed collides, the anti-collision assembly is prevented from being collided. In addition, the anti-impact assembly can prevent fragments from being generated through collapse of the internal structure of the anti-impact assembly, the device is protected while most impact is absorbed, secondary damage caused by fragment splashing is prevented, and therefore the functionality and safety of the device are further improved.
Owner:XINJIANG ONEZAWA CONSTRUCTION CO LTD

system

This prevents the accuracy of vehicle control from decreasing due to unevenness on the road. [Solution] The system comprises an uneven portion that is at least one of a protrusion configured to be able to freely protrude from the track on which the vehicle travels and a recess configured to be able to freely recess from the track, the uneven portion configured so that the vehicle can ride over it, and an unevenness control unit that controls the difference in elevation between the uneven portion and the track by operating the uneven portion.
Owner:TOYOTA JIDOSHA KK

Road construction area dynamic safety guiding system for complex traffic environment

The invention relates to the technical field of highway construction, in particular to a highway construction area dynamic safety guidance system for a complex traffic environment, which comprises a traffic flow monitoring module, a space change identification module, a risk partition judgment module, a dynamic guidance strategy module and an information release coordination module. According to the method, a dynamic guide information generation mechanism is constructed by combining real-time traffic flow monitoring data and construction area space change information, so that the change of a traffic state can be reflected in real time, and the guide information in the construction area is ensured to be consistent with the actual traffic flow density and lane space change; different construction areas are guided differentially according to risk levels and traffic conditions, high-risk areas are clearly divided, the accuracy and timeliness of information release are improved, the release frequency and content of guide information are dynamically adjusted, the traffic order and traffic safety of the construction areas are guaranteed, and the static and lagged information release problem in a traditional scheme is solved.
Owner:AVIC CHUANGZHI TECH (XIAN) CO LTD

Isolation guardrail for road engineering

The isolation guardrail for the road engineering comprises a supporting main rod, and an isolation assembly and a containing assembly are fixedly arranged at the two ends of the supporting main rod respectively. Each isolation assembly comprises a connecting top frame, a telescopic hanging rod, a connecting bottom plate and a locking rod, one end of each connecting top frame is fixedly connected with the supporting main rod, the other end of each connecting top frame is provided with a connecting piece, and the connecting pieces of the two connecting top frames are connected through a connecting bolt after being spliced and inserted, so that the two connecting top frames can rotate relatively; the two ends of the telescopic hanging rods are fixedly connected to the connecting top frame and the connecting bottom plate correspondingly. A locking rod is arranged on the connecting bottom plate, a locking hole is formed in the bottom of the connecting top frame, the locking hole is connected with the locking rod in a clamped mode, and the locking rod and the locking hole are used for unlocking, so that the telescopic hanging rod can fall down and be unfolded to be matched with the connecting bottom plate to form a separation net.
Owner:TIANJIN MUNICIPAL ENGINEERING DESIGN & RESEARCH INSTITUTE CO LTD

Intelligent guiding signboard for smart city

The smart city intelligent guiding signboard comprises a stand column and a cover cap, a first sliding groove is formed in the stand column, and the bottom of the inner wall of the first sliding groove is rotationally connected with a threaded rod. The utility model has the beneficial effects that the height of the direction board is adjusted to adapt to different use scenes and requirements, for example, in peak traffic hours, the direction board can be lifted so as to be clearly seen by vehicles and pedestrians in the distance, and can be lowered when not needed, so that the direction board is prevented from being damaged, and the direction board is adjusted along with urban planning, new landmark emergence or activity holding; the direction board can be quickly replaced, and the latest guiding information can be accurately transmitted; in addition, according to busy degrees of different road sections and requirements of special time periods, direction boards can be flexibly added, information transmission efficiency is improved, pedestrians and vehicles can be assisted to pass smoothly in an all-around mode, a display screen visually provides auxiliary guiding information for people, the direction boards and the display screen supplement each other, and the urban guiding service level is greatly improved.
Owner:BEIJING SMART CLOUD TECHNOLOGY CO LTD

Road construction vehicle-mounted early warning system

The road construction vehicle-mounted early warning system comprises a radar sensing module, a first communication module, a controller module and a warning module, the output end of the radar sensing module is electrically connected with the input end of the first communication module, and the radar sensing module is used for detecting the running speed and vehicle distance data of a vehicle; the output end of the first communication module is electrically connected with the input end of the controller module, and the first communication module is used for transmitting the detected vehicle running speed and vehicle distance data to the controller module to screen abnormal data; the output end of the controller module is electrically connected with the input end of the warning module, and the controller module is used for carrying out early warning and reminding on a vehicle corresponding to the abnormal data; the driving speed and the vehicle distance data of the vehicle are monitored in real time through the radar sensing module, the detected data are transmitted to the controller module to be processed, the warning module carries out acousto-optic reminding on the vehicle with abnormal data, the potential collision risk can be found and reminded in time for a driver, the occurrence rate of traffic accidents is reduced, and the safety is improved.
Owner:HUBEI PROVINCE FREEWAY IND DEV +1

A disability parking space protection device

A disability parking space protection device 99 near a parking space designated for disabled persons comprises a housing (e.g. bollard 11), scanning means 3, a light source 2 and a processor which use
Owner:BRASSEY ANTONY

Road construction operation deploying and controlling trailer

The utility model discloses a road construction operation deploying and controlling trailer which comprises a bottom plate and a frame, movable solar cell panels capable of being unfolded and folded are installed on the two sides of the frame respectively, and a fixed solar cell panel is installed on the front side of the top of the frame. The rear side of the top of the frame is provided with a speed limit identification display module which can be unfolded and folded, and the rear end of the frame is provided with a guide arrow identification display module. A plurality of conical barrel stacking supports, a storage bin and a storage battery pack are installed on the bottom plate, and the storage battery pack is used for storing electric energy converted from solar energy and supplying power to the speed limiting mark display module and the guiding arrow mark display module. The storage battery is used for supplying power, space is saved, and environment friendliness is achieved; the tail is provided with a guide arrow to warn the rear, and safety is guaranteed; when arriving at the site, the system can be used immediately after being unfolded; a conical barrel bracket and a storage bin are arranged in the vehicle, so that the vehicle is portable; the whole vehicle is low and convenient to carry; voice alarm and Beidou positioning are realized at the tail of the vehicle, and local and remote dual control is supported.
Owner:BEIJING ZHONGKAI LUDA TRANSPORTATION TECH CO LTD

Rapid assembly type assembled handrail for buildings

The utility model relates to the technical field of assembly type buildings, and discloses a fast assembly type assembly handrail for buildings, which comprises a bottom plate, an installation mechanism is arranged at the top of the bottom plate, a protection mechanism is arranged on the surface of the installation mechanism, the installation mechanism comprises a fixing plate, the fixing plate is arranged at the top of the bottom plate, and the protection mechanism is arranged on the surface of the fixing plate. And limiting grooves are formed in the two sides of the fixing plate correspondingly, stand columns are inserted into the limiting grooves and fixedly connected to the top of the bottom plate, and transverse plates are fixedly connected to the bottoms of the stand columns. Compared with a traditional integrated handrail, the rapid assembly type assembled handrail for the buildings has the advantages of being small in occupied space and convenient to carry through the arranged installation mechanism, common lateral impact force in the building construction process can be effectively resisted through the arranged protection mechanism, and the assembly type assembled handrail for the buildings has the advantages of being convenient to carry and high in practicability. And a reliable safety protection barrier is provided for field operation personnel.
Owner:GUANGDONG WUXIANG CONSTRUCTION CO LTD

A warning and deceleration device suitable for virtual and real line violation lane changing and a construction method thereof

The present application relates to the technical field of road traffic marking, and particularly relates to a warning and deceleration device suitable for illegal lane changing of broken and solid lines and a construction method thereof, which comprises fixed deceleration blocks and telescopic deceleration blocks arranged between broken lines and solid lines on a roadbed assembly, a plurality of concrete precast grooves are formed on the roadbed assembly, and each concrete precast groove is provided with a fixed deceleration block and a telescopic deceleration block; the fixed deceleration block is fixedly connected with the concrete precast groove through a fixed pin, the telescopic deceleration block is arranged on one side of the fixed deceleration block, and the telescopic deceleration block is respectively provided with a trigger force transmission device and an action feedback device; the trigger force transmission device comprises a trigger device, a resilient force transmission lever assembly arranged below the trigger device, and a force transmission arm assembly connected with the resilient force transmission lever assembly. The present application can play a good role in guiding and indicating correct lane changing, prevent the behavior of illegal lane changing of vehicles, but does not affect the normal lane changing behavior of vehicles according to the marking lines, so as to ensure the order of traffic.
Owner:NANTONG UNIV

Traffic signal control system and traffic signal control method

To enable a vehicle approaching an alternating traffic section to smoothly and efficiently pass through the alternating traffic section.SOLUTION: When a vehicle C1 approaches an alternating traffic section while a traffic light 25A is green denoting an access permission state, an approaching vehicle detection sensor 29A detects this vehicle C1 and measures the speed v and distance x of the vehicle C1. A time t till the vehicle C1 enters the alternating traffic section is measured using the measured v and x, and the access permission state of the traffic light 25A is maintained until the time t elapses. Furthermore, when the vehicle C1 approaching the alternating traffic section goes out of the detection range of the approaching vehicle detection sensor 29A and the vehicle C1 can no longer be detected by the approaching vehicle detection sensor 29A, the access permission state of the traffic light 25A is maintained until the passage of the vehicle C1 is detected by a passing vehicle detection sensor 22A.SELECTED DRAWING: Figure 1
Owner:ALSOK INC

Safety barricade system for use with metal grate flooring

The safety barricade system for use with metal grate flooring may include a stanchion, one or more retainers, and a warning light. The bottom of the stanchion may detachably couple to a metal grate includes a floor and may be held in place by the one or more retainers. The stanchion may be vertically-oriented such that the top of the stanchion is elevated above the metal grate, placing the top of the stanchion within the cone of vision of a user. The stanchions may be used individually to designate a position. The stanchions may be used in groups and in conjunction with caution tape to designate a boundary. The warning light located at the top of the stanchion may be illuminated to increase the visual awareness of the stanchion.
Owner:CARNATHAN ANTHONY EUGENE

Bolt Retainer System

A multi-piece bolt retainer system for use with a triangular slip base system for breakaway road sign installation is disclosed. The assembly includes a plurality of independent bolt retainer members each configured to engage and retain a respective bolt positioned between a top and bottom slip base plate. The modular configuration facilitates precise installation, uniform torque distribution, and predictable slip performance during vehicle impact.
Owner:NELSON LOREN BRIAN

Visual grading identification design method for gradient effect concave deceleration strip

The invention relates to the technical field of road safety facilities, in particular to a gradient effect concave deceleration strip visual grading mark design method which comprises the steps that S1, basic design data of a target road scene are obtained, and the basic design data comprise a target limited vehicle speed numerical value and a total length numerical value of a deceleration area; s2, according to the basic design data, geometric configuration parameters of a plurality of concave speed reduction units sequentially arranged in the vehicle advancing direction are calculated, and the geometric configuration parameters comprise the concave depth numerical value of each concave speed reduction unit and the distance numerical value between every two adjacent concave speed reduction units; the concave depth value obtained through calculation presents a gradually increasing trend in the vehicle advancing direction. According to the method, the concave speed reduction units with the gradually-increased depth and the gradually-decreased interval are configured through an algorithm, the overspeed vehicle is forced to decelerate through non-linear amplified composite vibration, and the control efficiency of road section speed limiting is improved.
Owner:陈冕

Non-paved pavement construction warning equipment

The utility model belongs to the field of warning boards, and particularly relates to non-paved pavement construction warning equipment which comprises a warning board and a frame body, the warning board is fixedly connected to the middle of the frame body, and a support is installed at the bottom of the frame body. Connecting seats are fixedly connected to the top and the bottom of the frame body, belt wheels are rotationally connected to the middles of the two connecting seats, driving belts are installed on the two belt wheels, supports are fixedly connected to the driving belts, and brush rollers are installed on the supports. A driving belt is installed on the two belt wheels in a tensioning mode, the belt wheels rotate to drive the driving belt to move, a support is fixedly connected to the driving belt, the support drives a brush roller to move up and down, the brush roller is located on the side face of the warning board, the warning board is swept by means of up-down movement of the brush roller, and therefore the warning board can be cleaned. Therefore, the situation that the surface of the warning board is covered with dust due to the fact that dust on a non-paved road surface is much raised is reduced.
Owner:GUANGDONG LIHU CONSTR CO LTD

Movable anti-collision refusal horse

The utility model belongs to the field of security and protection instruments, and discloses a movable anti-collision refusal horse which comprises a main body device used for bearing movement, and a plurality of stabbing devices which are uniformly distributed on one surface of the main body device and are used for highlighting and increasing refusal capability, a plurality of warning devices for emitting light warning are uniformly mounted at the top of the main body device; the stabbing device comprises a transverse plate, and a plurality of stabbing columns and fixing bolts are uniformly distributed on the transverse plate; the warning device comprises a lamp holder, an explosion-proof lamp is installed on the lamp holder, a switch button is arranged on the side face of the lamp holder, and a fixing assembly used for binding connection is arranged on the bottom face of the lamp holder. According to the movable anti-collision refusal horse disclosed by the utility model, the detachable stabs are arranged, so that the stabs are convenient to disassemble, assemble, maintain and replace; by means of the warning device capable of being rapidly disassembled and assembled, the explosion-proof lamp is convenient to disassemble, assemble, maintain and replace; and through the arrangement of the one-way stabs, the convenience of control and use is improved.
Owner:HENAN YINGDUN POLICE EQUIP CO LTD

A traffic safety guiding device for highway maintenance construction

This utility model provides a traffic safety guidance device for highway maintenance construction, including an indicating mechanism and a support mechanism, which are detachably installed together. The indicating mechanism includes an indicator sign, and two support frames are symmetrically arranged on the bottom back of the indicator sign along its central axis. Each support frame has an n-shaped end, and a fastening key is installed on the n-shaped structure. A support rod mounting hole is provided at the center of the bottom of the indicator sign. In use, by providing a support rod mounting hole at the bottom of the indicator sign, the indicator sign can be connected to the support mechanism through the support hole, allowing it to be installed on the road surface. After disassembling the support mechanism, the indicator sign can be secured to a fence using the support frame and fastened with the fastening key. Alternatively, the indicator sign can be fixed to a flat surface by using screws in conjunction with the support hole. This adaptable method improves the ease of installation according to the construction environment.
Owner:XINGTAI ROAD & BRIDGE CONSTR GENERAL

New road structure for guiding vehicles traveling in the wrong direction and the fence used therein

To provide a road that allows a vehicle that should be entering the correct lane to enter the wrong lane to return to the correct lane smoothly and safely, reduces congestion, delays, and resulting traffic accidents for vehicles traveling on both the correct and wrong lanes, and maintains a high traffic flow rate. [Solution] The road structure for guiding vehicles traveling in the wrong direction according to the present invention has a first double-lane road (10), a second double-lane road (20), and a central median (30), A predetermined central bypass road (40) is provided in the aforementioned central median (30). It is characterized by having a fence (50) to guide vehicles traveling in the wrong direction and / or a fence (60) to guide vehicles traveling in the right direction.
Owner:熊部 尚文

Speed limiting warning board convenient to fold

The utility model relates to the technical field of warning boards, and discloses a speed limit warning board convenient to fold, which comprises a speed limit board I, a speed limit board II, supporting legs and a warning lamp, the structure of the speed limit board I is the same as that of the speed limit board II, and the speed limit board I is positioned above the speed limit board II; multi-dimensional hinges are installed at the two ends between the rear portion of the first speed limiting board and the rear portion of the second speed limiting board, and supporting legs are installed at the lower ends of the inner sides of the multi-dimensional hinges. The warning lamp is installed and distributed at the upper end of the front portion of the first speed limiting board. According to the speed-limiting warning board convenient to fold, the first speed-limiting board and the second speed-limiting board which are connected through the multi-dimensional hinge are adopted, storage and folding of the up-down overturning supporting legs and the inner-outer overturning supporting legs are achieved, transportation and storage are convenient, the warning board can play a role more timely, the warning lamp is installed at the upper end of the front portion of the first speed-limiting board, the position is striking, and the warning effect is good. And the working state of safety warning is always ensured.
Owner:CHUZHOU ANYANG INTELLIGENT TECH CO LTD

An energy recycling road lifting robot and a method of using the same

PendingCN122128983ATraffic signalsMechanical energy handlingRoad traffic managementControl theory
This invention relates to the field of road traffic management technology, specifically disclosing an energy-recovery road lifting robot and its usage method. The robot includes a top plate, a bottom plate, a first inclined plate, and a second inclined plate. The top plate is positioned directly above the bottom plate, and the first and second inclined plates are located on either side of the top plate. A lifting mechanism is installed on the top of the bottom plate. A buffer support mechanism and a sliding mechanism are provided between the first and second inclined plates and the bottom plate. Power generation components are installed at the bottom of both the first and second inclined plates. Multiple ranging components are installed on the top of the bottom plate. Side holes are formed inside both the first and second inclined plates, and cleaning mechanisms are installed inside these side holes. In this invention, the ranging components, in conjunction with the lifting mechanism, can push the top plate upwards to a specified height, adapting to the height of different vehicle chassis. Simultaneously, as a vehicle runs over the robot, the power generation components generate electricity, achieving efficient recovery of the pressure potential energy from passing vehicles and reducing reliance on external power supply.
Owner:ANHUI NORMAL UNIV WANJIANG COLLEGE

A method and system for identifying energy absorption working conditions of a speed bump

The application provides a speed bump energy absorption working condition recognition method and system, and relates to the technical field of intelligent transportation systems.The method collects vehicle weight, speed and vertical acceleration data in real time through a laser radar and a load cell, constructs a full-quantity feature data set, first calculates kinetic energy change and vertical impact energy, and after the cumulative energy reaches a threshold, stores the speed and acceleration data before and after the speed bump according to vehicle weight, performs Fourier transform on the acceleration data, extracts the low-frequency energy proportion, and constructs a quadratic regression model combined with the speed before and after the speed bump to predict the speed after passing through.The energy proportion abnormal threshold is set by statistical stratification of the mean and standard deviation of the energy proportion database, and when the low-frequency energy proportion of a new vehicle is lower than the energy proportion abnormal threshold and the speed prediction error is greater than or equal to 15%, it is determined that the energy absorption structure fails, and the dynamic monitoring and accurate diagnosis of the health state of the speed bump are realized.
Owner:CHONGQING JIAOTONG UNIV

Composite active light-emitting digital visual traffic sign

The invention discloses a composite active light-emitting digital visual real-time display traffic sign, and belongs to the field of road traffic signs, the composite active light-emitting digital visual real-time display traffic sign comprises a display screen, a reflecting layer, a light absorption layer and a microstructure layer which are sequentially arranged from bottom to top, and the reflecting layer and the light absorption layer form an image-text layer for displaying fixed traffic information. The brightness of the display screen can be adaptively adjusted according to the illumination intensity, and various modes such as fixed information display, image-text and digital composite display, high-definition and high-brightness display and emergency information display are realized; the reflecting layer and the light absorbing layer are designed in a partitioned manner, so that light reflection and transmission requirements are met; the microstructure layer guarantees the basic luminosity performance of the product. The active light-emitting traffic sign solves the potential safety hazard problem of a traditional active light-emitting traffic sign (the basic traffic indication function is lost under the condition of failure / power failure), has the advantages of being high in production efficiency, high in all-environment adaptability, good in application effect and the like, and is beneficial to large-scale application and popularization.
Owner:GUOJING HECHUANG (QINGDAO) TECH CO LTD +1