57 results about "Raised pavement marker" patented technology

There is provided a highway safety system for use by a vehicle for detecting a lane boundary defined by a plurality of markers, wherein each of the plurality of markers has an associated identifier. The highway safety system comprises a detection module configured to detect the associated identifier in each of the plurality of markers defining the lane boundary, wherein the detection module is further configured to receive marker detection data from the associated identifier in each of the plurality of markers defining the lane boundary. The highway safety system further comprises an alarm module for determining an alarm condition based on marker detection data provided by the detection module, wherein the alarm module is configured to generate an alert according to the alarm condition. For example, each of the plurality of markers may be a raised pavement marker, and the associated identifier may be an RFID tag.

A pavement marking article that has an adhesive composition for adhering the article to a pavement substrate, where the adhesive composition includes a reaction product of an acrylic acid ester of a monohydric alcohol whose homopolymer has a Tg less than 0° C., a non-polar ethylenically unsaturated monomer, and 0-10 parts by weight of a polar ethylenically unsaturated monomer. Preferably the amount of the acrylic acid ester is about 60-90 parts by weight, and the amount of the non-polar ethylenically unsaturated monomer is about 10-40 parts by weight.

Also, a raised pavement marker that comprises:

• • (a) a pavement marker body having upper and lower surfaces and an apparent flexural modulus of at least about 50,000 psi and
  • (b) a pressure sensitive adhesive layer disposed upon the lower surface of the marker, wherein the adhesive has:
    • (i) a transition region that begins at a frequency of about 10,000 radians/s or more and extends to a frequency of about 100 radians/s or less at about 25° C.; and
    • (ii) a minimum shear modulus of about 1×105 Pa at an impact frequency of about 100 radians/s at 25° C.; and
    • (iii) a shear modulus value of about 2×104 to 2×105 Pa at a frequency of 1 rad/sec at 25° C.

Raised pavement markers that use a pressure sensitive adhesive meeting parameters (i)-(iii) can demonstrate good adhesion to roadways and are capable of withstanding repeated impacts from motor vehicle tires.

A ground level illumination system such as a road stud comprises a light source (12) positioned below ground level (8). An optics block (9) and a top block (2) transmit light from the source (12) to the exterior, the light rising at a shallow angle as a collimated beam in the top block (2) to emerge at a window (4) above the ground level (8). The window (4) is shaped to refract the light into a beam (16) that descends at a shallow angle relative to the ground level (8). The emerging beam (16) may be used to illuminate road markings (26) formed from luminous paint that can be re-charged by the illumination system. A feedback mechanism (82) can measure reflected light levels to maintain the optimal “charge” in the paint. A further element (84) of the system may also compare the intensity of reflected light at different wavelengths to detect the presence of fog.

The invention relates to the technical field of long and big tunnels of expressways, in particular to a method for setting a retro-reflecting system of a long and big tunnel of an expressway. The method for setting the retro-reflecting system of the long and big tunnel of the expressway comprises the following steps of dividing the long and big tunnel into an entrance section, a transitional section, a middle section, a middle warning section and an exit section in sequence; respectively using combinations of an intermediate frequency reflective ring, an intermediate frequency side wall inducement sign, a high frequency delineator and a high frequency road stud at the entrance section and the exit section; using the combination of the intermediate frequency reflective ring, an intermediate frequency reflective stripe, the intermediate frequency side wall inducement sign, the high frequency delineator and the high frequency road stud at the transitional section; using the combination of a low frequency reflective ring, a low frequency note mark line, the intermediate frequency reflective stripe, the intermediate frequency side wall inducement sign, the high frequency delineator and the high frequency road stud at the middle section; continuously arranging two colored reflective rings as the middle warning section in the middle section; and arranging rhythm type information, the colored reflective ring and a colored reflective stripe on the side wall as a fatigue awakening area every three warning sections. The method for setting the retro-reflecting system of the long and big tunnel of the expressway is applied to expressway tunnels with limited speeds of 60-80 km/h and lengths of larger than 1000 m.

The invention discloses an intelligent pedestrian crossing detection system. The system comprises a thermal imaging camera, a video analysis module, a microprocessor module, and a spike warning module. The thermal imaging camera inputs a shot video into the video analysis module for analysis, a pedestrian movement track and a vehicle movement track are acquired, and the microprocessor module judges whether a pedestrian crosses a road or not according to the pedestrian movement track, judges whether the distance between a vehicle and the pedestrian is within a preset range or not according to the vehicle movement track at the same time, and controls the spike warning module to generate lamplight with colors flickering alternately when the pedestrian crosses the road and the distance betweenthe vehicle and the pedestrian is within the preset range. According to the invention, passing-by pedestrians can be detected, the pedestrians are warned when the pedestrians are in a dangerous state, the hidden danger of traffic accidents is eliminated, the traffic accidents are avoided, and the safety guarantee is provided for the passing-by pedestrians.

The invention relates to a ballast bed at level intersection of railway and highway and a preparation method thereof, including the base and concrete pavement, characterized in that the concrete pavement bed is formed by splicing more than one block track plate unit, wherein each block track plate unit is a rectangular track plate, comprising a reinforcing bar cage, a patterned mesh plate welded above the reinforcing bar cage, a rail bearing groove arranged in the reinforcing bar cage, a threaded spike, an insulating sleeve and a concrete layer. The preparation method comprises the following steps of: ramming and leveling the base with fine crushed stone and dry-mixed cement mortar; directly lifting the partitioned track plate unit on the base; and fixing the partitioned track plate unit on the base by concrete to form a complete highway or railway ballast bed. Compared with other types of ballast beds, the ballast beds have the advantages of strong bearing capacity, high strength, noteasy to be eroded and destroyed by water, zero maintenance and cost economy, and can adapt to the changes of line parameters, such as curve radius, super-high, sinking slope and widening, and so on.The ballast beds are stable, durable and have a service life of more than 15 years.

Apparatus for an Inductive power transfer system, particularly adapted for lighting systems such as road studs, includes a pick-up core (12) having a flange portion (30), and a receiver (20) which includes a recess (25) for locating a primary conductor (26).

The invention discloses a highway high-speed rail transit system, which comprises a lane and a vehicle-mounted driving controller. Multiple guiding track spikes are arranged at intervals on the central line of the lane; two sides of the lane are provided with navigation track spikes; distances between the navigation track spikes at two sides of the lane and the central line of the lane are the same; the vehicle-mounted driving controller is connected with a traversing mechanism and an electronic control unit of the vehicle via a CAN bus; the vehicle-mounted driving controller can transmit radio signals to the guiding track spikes and the navigation track spikes at two sides of the lane and receive radio signals fed back by the guiding track spikes and the navigation track spikes at the two sides. The problem of traffic accidents caused as the existing highway lane marking line and the iron fence are influenced by human factors and weather visibility factors due to an optical reflection principle can be solved fundamentally, the driving speed is greatly improved, safety performance is enhanced, and the investment cost of highway construction is reduced.

A railway spike for connecting an associated metal member with an associated wood member includes a head including an annular flange and a standoff extending axially from the flange. An intermediate section extends axially from the standoff. At least one holding ring is disposed on the intermediate section. The at least one holding ring extends radially away from the intermediate section and is adapted to engage the associated wood member. A shank extends axially from the standoff. The shank includes a thread which is adapted to engage the associated wood member.

The invention discloses a telescopic light-variable warning track spike. An inner shell is arranged in an outer shell in a sleeving way, wherein a seal ring is mounted between the outer shell and the inner shell; a compression spring is mounted between the bottom of the outer shell and the bottom of the inner shell; the inner shell can move up and down in the outer shell under the actions of the outer force and the compression spring; a transparent cover is fixedly mounted at the top end of the inner shell and is exposed out of the top end of the outer shell; a single-chip microcomputer controller is mounted in the transparent cover and is fixed on the inner wall; a storage battery is mounted below the single-chip microcomputer controller and is fixed in the inner shell; a solar cell panel is mounted above the single-chip microcomputer controller and below the transparent cover and is fixed on the inner shell; a color changing LED (Light Emitting Diode), a sensitimeter and an antenna are mounted above the solar cell panel and below the transparent cover; one end of each of the color changing LED, the sensitimeter and the antenna is connected to the single-chip microcomputer controller; the single-chip microcomputer controller comprises a wireless signal transmitting module, a wireless signal receiving module, a color changing LED control module and a storage battery charging control module; an action spring piece is fixedly connected to a micro switch.

A raised pavement marker detector on a paint truck to detect the interruption of line striping for raised pavement markers, including a housing attached by a bracket to a carriage of the truck. The housing includes a rear shaped body having a first plurality of openings extending therethrough. Each of the first plurality of openings contains a retro reflector sensor and each sensor has a housing containing a transmitter and a receiver. A rear cover closes the first plurality of openings through the rear shaped body to protect the sensors. A front body contains a second plurality of openings extending therethrough and mounted to the rear shaped body whereby the second plurality of openings extending through the front body overlaps the first plurality of openings through the rear rectangular shaped body so as to receive a lens portion of each retro reflector sensor within the first plurality of openings.

The invention discloses a parking space detection and light-induced parking system and method, and belongs to the technical field of parking management. The system comprises a server platform, a LoRa wireless communication module, a gateway, geomagnetic sensing spikes, light guide spikes and a photosensitive sensor. The geomagnetic sensing spikes and the light guide spikes establish communication with the gateway through the LoRa wireless communication module, and the gateway establishes communication with the server platform through the 4G transmission module; the geomagnetic sensing spikes are arranged in each parking space in the parking lot; the light guide spikes are mounted at the entrance of each parking space and the entrance of a horizontal row of parking spaces; the photosensitive sensor is carried on the gateway to detect the light intensity; and according to the invention, when the light of the parking lot is poor at night, the light guide spikes in the parking lot can be used for guiding, and a driver can quickly find an idle parking space by checking the bright green light guide spikes, so that the running efficiency of the parking lot at night is improved.

The invention provides a research method for arranging an energy storage type long afterglow self-luminous spike on a rural highway. The research method comprises the following steps: (1) establishinga normal working state of the spike; (2) actually measuring a light distribution curve; (3) generating an IES file (simulation lamp model); (4) importing the IES file into DIALux illumination simulation software; (5) extracting a preliminary layout scheme, and utilizing UC-win/Road to carry out optimal driving simulation; and (6) performing field layout verification. The method has the advantagesthat the optical physical quantity of the spikes in the actual working state is actually measured, and a layout scheme is quantitatively researched; a spike is assumed to be a lamp, a corresponding simulation lamp model is generated, lamp illumination simulation software is used for layout research, and the modeling method is simplified; optimizing each group of preliminary layout schemes by using a driving simulation system in combination with the experience of a driver and the driving psychology; and a field layout test is carried out to visually inspect the feasibility of the scheme.

The invention provides a vehicle-road cooperative programmable telescopic spike and a warning method. The vehicle-road cooperative programmable telescopic spike includes a main body control part, a shock absorbing spring and a base. The main body control part includes a shell, a reflective strip, a sealing ring, a photosensitive sensor, a main control board and a programmable LED lamp. The warningmethod based on the vehicle-road cooperative programmable telescopic spike controls a light emitting mode of the programmable LED lamp through sensitive external environment, and realizes the function of intelligently guiding and warning vehicles under different environment and requirements with the cooperation of the reflective strip. Meanwhile, the damage to tires is reduced and the service life of the spike is prolonged through sinking buffer design.

The present invention incorporates to a new temporary, reusable, retroreflective, raised pavement marker design. The pavement marker utilizes a water soluble, adhesive embedded in a fibrous base material for application to the pavement. This temporary adhesion method allows the pavement marker to be reused after removal from the pavement. The semispherical shape of the marker provides increased lateral stability. The recesses on the top surface of the marker protect the retroreflective microspheres from loss of retrorefectivity from vehicular abrasion. The round shape also allows the marker to be used to form arrows and other pavement markings.

The invention relates to an on-road safety traffic island based on danger grade division. The traffic island is divided into a traffic island with the first-grade danger grade, a traffic island with the second-grade danger grade and a traffic island with the third-grade danger grade in sequence according to the vehicle speed.Each of the three traffic islands comprises a buffer anti-collision island head, a safety island body and a traffic island base, a traffic sign support rod is fixed on the safety island body, and a right road driving sign is fixed at the top end of the traffic sign supportrod; yellow-black vertical surface marked lines are drawn or pasted on the outer surfaces of the traffic island base, the buffer anti-collision island head and the edge of the safety island body; reflective glass spikes are arranged at the top end of the arc area of the traffic island base. Danger grading is carried out on the traffic island on the road according to different vehicle speeds and collision risks, then different protection and warning induction grades are carried out according to the danger grading, and the safety of pedestrians, drivers, vehicles and traffic island facilities can be effectively guaranteed.

The invention discloses a dynamic regulation and control method for a special lane for network-connected vehicle based on permeability. The method comprises the following steps of: 1, acquiring the total number of vehicles entering each lane and the number of network-connected vehicles in a current time period; 2, judging whether a special lane for the network-connected vehicle needs to be set in the current time period; 3, judging the lane number of the special lane for the network connection vehicle in the current time period through an algorithm; 4, sending the serial number of the special lane for the network-connected vehicle to the network-connected vehicle in the road section, and meanwhile controlling the intelligent light-emitting spikes on the corresponding lane marking lines to emit light; and 5, circulating the steps, and judging the lane number of the special lane for the network connection vehicle in the next time period. According to the invention, the position of the special lane for the network-connected vehicle can be dynamically selected in real time according to the network-connected vehicle permeability of each lane, the necessary lane changing times of the vehicles are reduced, the lane changing conflicts among the vehicles are reduced, and the traffic flow operation safety and the traffic flow operation efficiency are improved.