US20080030978A1 - Stud for Roads - Google Patents
Stud for Roads Download PDFInfo
- Publication number
- US20080030978A1 US20080030978A1 US11/632,606 US63260605A US2008030978A1 US 20080030978 A1 US20080030978 A1 US 20080030978A1 US 63260605 A US63260605 A US 63260605A US 2008030978 A1 US2008030978 A1 US 2008030978A1
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- US
- United States
- Prior art keywords
- light emitting
- photodetector
- emitting device
- road
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000005286 illumination Methods 0.000 claims abstract description 10
- 239000003550 marker Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 6
- 230000011664 signaling Effects 0.000 claims description 2
- 238000001429 visible spectrum Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000013459 approach Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
- E01F9/553—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members
- E01F9/559—Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members illuminated
Definitions
- This invention relates to road signs such as road markers and more particularly to road studs.
- Retro-reflective road studs are well known in the art. These studs are normally mounted in spaced relation relative to one another along a centre and/or side line of a road. Light emitted by the head lights of a first vehicle traveling in a first direction is reflected in an opposite or reverse direction by the stud, to make the stud and hence the line on which it is mounted better visible to a driver of the first vehicle. A problem with this system is that when a second vehicle is approaching the first vehicle from an opposite direction, the head lights of the vehicles ought to be dipped.
- a road sign comprising:
- the light emitting device preferably emits light in a direction wherein visibility of the body is enhanced for a driver of a second vehicle being driven in a direction other than the first direction.
- the body may be the body of a vehicle carrying the sign.
- the sign may be in the form of a road side marker.
- the sign may be in the form of a road surface mountable stud and wherein the body is configured to be mounted on a road surface.
- the photodetector may be a photoswitch connecting the light emitting device to a power supply.
- the power supply may be externally of the body and in other embodiments at least part of the power supply may be mounted on the body of the sign.
- the power supply may comprise a photosensitive power source and a charge storage device.
- the photodetector is connected to the light emitting device to act as power supply and to power the light emitting device upon illumination of the photodetector.
- a photoswitch may be connected in the circuit with the photodetector and the light emitting device.
- the photodetector may be mounted on one sidewall of the body and the light emitting device may be mounted on another sidewall of the body, such as an opposite sidewall.
- a retro-reflector may be mounted on at least one of said one sidewall and said other sidewall of the body.
- Also included within the scope of the present invention is a method of signaling to traffic on a road, the method comprising the steps of:
- the method may comprise the further steps of causing a light reflector on the body to reflect the impinging light in an opposite direction towards the first vehicle and causing the light emitting device to emit light in a direction wherein visibility of the body is enhanced for a driver of another vehicle which is being driven in a direction other then the first direction.
- FIG. 1 is a diagrammatic representation of a road section, two mutually approaching vehicles on the road section and a plurality of known road studs mounted on a centre line of the road section;
- FIG. 2 is a diagrammatic perspective view of one embodiment of a road marker according to the invention, in the form of a road surface mountable road stud according to the invention;
- FIG. 3 is a very basic block diagram of part of an electric circuit forming part of said one embodiment of the road stud according to the invention.
- FIG. 4 is a similar diagram showing other detail of the stud in FIG. 2 according to the invention.
- FIG. 5 is a basic block diagram of a second embodiment of the stud according to the invention.
- FIG. 6 is a block diagram of an external power supply connected to a plurality of road studs according to the invention.
- FIG. 7 is a diagrammatic representation of another road stud.
- FIG. 8 is a diagrammatic representation of a further road sign according to the invention.
- FIG. 1 there is shown a conventional road 10 having a center line 12 .
- a first vehicle 16 travels in a first direction A and a second vehicle 18 travels in an opposite direction B.
- the known road stud comprises a body mountable on the road surface and carrying a retro-reflector.
- the reflector in use reflects back in direction B impinging light 17 emitted by the head lights of the vehicle 16 .
- This reflection makes the stud and hence the line more visible to a driver of vehicle 16 .
- the lights of the vehicles ought to be dipped. This causes the problem referred to in the introduction of this specification in that only one or two nearby studs are illuminated by the head lights of the vehicles to reflect light to the driver of the relevant vehicle, and which problem is aggravated by the temporary blinding effect of the light emitted by the headlights of the other vehicle.
- the stud 20 comprises a body 22 , which may have a conventional shape and configuration.
- the body comprises a base that is mountable on a road surface, to abut against the road surface.
- the body further comprises known low profile sidewalls 28 and 31 rising in slanting fashion from the base.
- the body 22 On at least one of the sidewalls 28 , the body 22 carries a conventional retro-reflector 24 for reflecting impinging light propagating in direction A in an opposite direction B.
- the body further carries a photodetector 26 in the form of a photoswitch on the sidewall 28 thereof and facing in direction B.
- the photoswitch 26 is electrically connected in a circuit 32 (shown in FIG. 3 ) to a light emitting device 30 and charge storage device 34 .
- the light emitting device 30 may be a light emitting diode (LED), is mounted on opposite sidewall 31 of the stud and emits light in direction A, that is in a direction opposite to the direction B wherein the reflector 24 reflects the impinging light.
- the circuit 32 is closed, so that the LED is energized.
- the LED emits light in direction A, so that the body 22 of stud 20 is better visible to the driver of an approaching second vehicle 18 , being driven in another direction, such as opposite direction B.
- the charge storage device 34 may be in the form of a capacitor or rechargeable battery 34 and is connected via a suitable charger circuit 36 to be charged by power generated by an on-board supply 37 and/or from another external supply.
- the photoswitch 26 is configured to close the circuit 32 upon illumination thereof by light emitted by the headlights of approaching traffic.
- a second and similar photoswitch may be provided on sidewall 31 to cause energization of a second LED provided on sidewall 28 .
- a single photoswitch may be provided in a suitable position on the body 22 to cause energization of both the LED's simultaneously.
- a second retro-reflector may also be provided on sidewall 31 .
- FIG. 5 Another embodiment of the stud is shown at 40 in FIG. 5 .
- the stud body 42 carries a photodetector arrangement 26 which is connected via optional day/night switch 38 to the light emitting device 30 .
- the switch is normally open.
- the LED 30 is energized by current generated at the arrangement 26 , as a result of illumination of arrangement 26 by the head lights of an approaching vehicle.
- the arrangement 26 acts as power supply or voltage source or current source and not as a mere switch as in the previous embodiment.
- a charge storage device 34 may be provided over the arrangement 26 as shown in FIG. 5 .
- a conventional retro-reflector is shown at 24 .
- a plurality of studs 50 . 1 to 50 . n are provided on a road surface 52 on a line 54 .
- Each stud comprises a respective body 56 carrying a respective light emitting device 58 . 1 to 58 . n .
- the devices may emit light in predominantly a selected direction as hereinbefore described, or omni-directionally.
- Electrical power for energizing the devices is derived from an external power source 60 .
- the external power source may be mounted on the road side and may comprise a solar panel 62 or any other suitable means for generating electricity.
- the source may comprise a local storage device such as a rechargeable battery 64 .
- the source is connected by a circuit 68 to the devices 58 . 1 to 58 .
- Photoswitches similar to switch 26 in FIGS. 2 and 3 may be provided on the stud bodies in series with the respective LED's 58 . 1 to 58 . n , to ensure that the LED is energized only when the photoswitch is illuminated by the head lights of approaching traffic.
- the stud 70 comprises a body 72 and the body is configured to receive at face 74 thereof light impinging in direction A and to transmit and/or reflect the light through the body and beyond face 76 thereof in direction A.
- the body may be transparent or translucent.
- the body may comprise a mirror arrangement for receiving and reflecting the impinging light in direction A.
- the body may further comprise fluorescent and/or phosphorescent means.
- a sign 80 according to the invention may be provided on a carrier vehicle as shown at 80 in FIG. 8 .
- the sign is shown where it is mounted on a rear end of the carrier vehicle 82 .
- at least part of the sign for example the light emitting devices thereof, may be mounted on other parts of the carrier vehicle, such as on the sides 85 thereof.
- the sign 80 comprises at least one photodetector 84 connected by an electrical circuit (not shown) to at least one light emitting devices 86 .
- the detector 84 causes the light emitting devices to be energized, to emit visible signals towards a driver of the following vehicle and/or even a third vehicle.
- the light emitting devices are mounted on the sides of the carrier vehicle, they may, when energized, make the carrier vehicle better visible to the driver of another vehicle, including the driver of a third vehicle being driven in another direction.
- a similar arrangement may be used on road side markers or furniture to demarcate a hazardous area or section on a road.
- the light emitting devices in all of the aforementioned embodiments may emit light in the red or orange or green parts of the visible spectrum. In other embodiments broad spectrum white light may be emitted.
- the aforementioned electrical circuits may comprise means for pulsing energization of the light emitting devices intermittently, including periodically.
Abstract
A road marker 20 comprises a body 22. A photodetector 26 mounted on the body is responsive to illumination by headlights of a first vehicle approaching the body. The photodetector is connected in a circuit 32 on the body also comprising a light emitting device 30. The circuit being configured to energize the light emitting device upon illumination of the photodetector by the head lights of a vehicle approaching the body in a first direction A and the light emitting device is mounted on the body to enhance visibility of the body, particularly for a driver of a second vehicle being driven in a direction B other than the first direction.
Description
- This invention relates to road signs such as road markers and more particularly to road studs.
- Retro-reflective road studs are well known in the art. These studs are normally mounted in spaced relation relative to one another along a centre and/or side line of a road. Light emitted by the head lights of a first vehicle traveling in a first direction is reflected in an opposite or reverse direction by the stud, to make the stud and hence the line on which it is mounted better visible to a driver of the first vehicle. A problem with this system is that when a second vehicle is approaching the first vehicle from an opposite direction, the head lights of the vehicles ought to be dipped.
- The result is that only a few nearby studs reflect light back to the drivers of the vehicles and accordingly the visibility of the line is reduced. Furthermore, the head lights of the approaching vehicle tend to at least partially blind the driver of the other vehicle. Hence, for at least a critical period while these two vehicles are approaching one another from opposite directions, the known road studs and accordingly also the lines on which they are mounted are often not sufficiently visible to either of the drivers.
- Accordingly, it is an object of the present invention to provide an alternative road sign, more particularly a road marker and associated method with which the applicant believes the aforementioned disadvantages may at least be alleviated.
- According to the invention, there is provided a road sign comprising:
-
- a body;
- a photodetector on the body;
- the photodetector being configured on the body to be sensitive to illumination by headlights of a first vehicle approaching the body in a first direction;
- the photodetector being connected in a circuit on the body also comprising a light emitting device;
- the circuit being configured to energize the light emitting device in response to illumination of the photodetector by the head lights of the first vehicle; and
- the light emitting device being mounted on the body to enhance visibility of the body.
- The light emitting device preferably emits light in a direction wherein visibility of the body is enhanced for a driver of a second vehicle being driven in a direction other than the first direction.
- In one embodiment of the invention the body may be the body of a vehicle carrying the sign.
- In another embodiment, the sign may be in the form of a road side marker.
- In yet another embodiment, the sign may be in the form of a road surface mountable stud and wherein the body is configured to be mounted on a road surface.
- In some embodiments, the photodetector may be a photoswitch connecting the light emitting device to a power supply.
- The power supply may be externally of the body and in other embodiments at least part of the power supply may be mounted on the body of the sign.
- The power supply may comprise a photosensitive power source and a charge storage device.
- In other embodiments, the photodetector is connected to the light emitting device to act as power supply and to power the light emitting device upon illumination of the photodetector. A photoswitch may be connected in the circuit with the photodetector and the light emitting device.
- The photodetector may be mounted on one sidewall of the body and the light emitting device may be mounted on another sidewall of the body, such as an opposite sidewall.
- A retro-reflector may be mounted on at least one of said one sidewall and said other sidewall of the body.
- Also included within the scope of the present invention is a method of signaling to traffic on a road, the method comprising the steps of:
-
- providing a road sign comprising a body carrying a photodetector and an electrical circuit connecting the photodetector to a light emitting device on the body;
- utilizing impinging light emitted by headlights of a first vehicle traveling in a first direction to cause the photodetector to cause energization of the light emitting device; and
- causing the light emitting device to emit light to enhance visibility of the body.
- The method may comprise the further steps of causing a light reflector on the body to reflect the impinging light in an opposite direction towards the first vehicle and causing the light emitting device to emit light in a direction wherein visibility of the body is enhanced for a driver of another vehicle which is being driven in a direction other then the first direction.
- The invention will now further be described, by way of example only, with reference to the accompanying diagrams wherein
-
FIG. 1 is a diagrammatic representation of a road section, two mutually approaching vehicles on the road section and a plurality of known road studs mounted on a centre line of the road section; -
FIG. 2 is a diagrammatic perspective view of one embodiment of a road marker according to the invention, in the form of a road surface mountable road stud according to the invention; -
FIG. 3 is a very basic block diagram of part of an electric circuit forming part of said one embodiment of the road stud according to the invention; -
FIG. 4 is a similar diagram showing other detail of the stud inFIG. 2 according to the invention; -
FIG. 5 is a basic block diagram of a second embodiment of the stud according to the invention; -
FIG. 6 is a block diagram of an external power supply connected to a plurality of road studs according to the invention; -
FIG. 7 is a diagrammatic representation of another road stud; and -
FIG. 8 is a diagrammatic representation of a further road sign according to the invention. - In
FIG. 1 , there is shown aconventional road 10 having acenter line 12. - On the line there are mounted in known manner a plurality of road studs 14.1 to 14.n. A
first vehicle 16 travels in a first direction A and asecond vehicle 18 travels in an opposite direction B. - The known road stud comprises a body mountable on the road surface and carrying a retro-reflector. The reflector in use reflects back in direction
B impinging light 17 emitted by the head lights of thevehicle 16. This reflection makes the stud and hence the line more visible to a driver ofvehicle 16. However, when asecond vehicle 18 approaches the first vehicle, the lights of the vehicles ought to be dipped. This causes the problem referred to in the introduction of this specification in that only one or two nearby studs are illuminated by the head lights of the vehicles to reflect light to the driver of the relevant vehicle, and which problem is aggravated by the temporary blinding effect of the light emitted by the headlights of the other vehicle. - A road sign in the form of a road surface
mountable road stud 20 according to the invention is shown inFIGS. 2 and 3 . Thestud 20 comprises abody 22, which may have a conventional shape and configuration. The body comprises a base that is mountable on a road surface, to abut against the road surface. The body further comprises knownlow profile sidewalls sidewalls 28, thebody 22 carries a conventional retro-reflector 24 for reflecting impinging light propagating in direction A in an opposite direction B. The body further carries aphotodetector 26 in the form of a photoswitch on thesidewall 28 thereof and facing in direction B. - The
photoswitch 26 is electrically connected in a circuit 32 (shown inFIG. 3 ) to alight emitting device 30 andcharge storage device 34. Thelight emitting device 30 may be a light emitting diode (LED), is mounted onopposite sidewall 31 of the stud and emits light in direction A, that is in a direction opposite to the direction B wherein thereflector 24 reflects the impinging light. When light emitted by the head lights ofvehicle 16 traveling in one direction, such as direction A impinges on thephotoswitch 26, thecircuit 32 is closed, so that the LED is energized. The LED emits light in direction A, so that thebody 22 ofstud 20 is better visible to the driver of an approachingsecond vehicle 18, being driven in another direction, such as opposite direction B. - Further features of the circuit are shown in
FIG. 4 . Thecharge storage device 34 may be in the form of a capacitor orrechargeable battery 34 and is connected via asuitable charger circuit 36 to be charged by power generated by an on-board supply 37 and/or from another external supply. As stated hereinbefore, in this embodiment, thephotoswitch 26 is configured to close thecircuit 32 upon illumination thereof by light emitted by the headlights of approaching traffic. - In another form of this embodiment of the stud, a second and similar photoswitch may be provided on
sidewall 31 to cause energization of a second LED provided onsidewall 28. In yet another form, a single photoswitch may be provided in a suitable position on thebody 22 to cause energization of both the LED's simultaneously. A second retro-reflector may also be provided onsidewall 31. - Another embodiment of the stud is shown at 40 in
FIG. 5 . Thestud body 42 carries aphotodetector arrangement 26 which is connected via optional day/night switch 38 to thelight emitting device 30. During the day, the switch is normally open. In this embodiment, theLED 30 is energized by current generated at thearrangement 26, as a result of illumination ofarrangement 26 by the head lights of an approaching vehicle. Hence, in this embodiment thearrangement 26 acts as power supply or voltage source or current source and not as a mere switch as in the previous embodiment. Acharge storage device 34 may be provided over thearrangement 26 as shown inFIG. 5 . A conventional retro-reflector is shown at 24. - In
FIG. 6 a plurality of studs 50.1 to 50.n are provided on aroad surface 52 on aline 54. Each stud comprises arespective body 56 carrying a respective light emitting device 58.1 to 58.n. The devices may emit light in predominantly a selected direction as hereinbefore described, or omni-directionally. Electrical power for energizing the devices is derived from anexternal power source 60. The external power source may be mounted on the road side and may comprise asolar panel 62 or any other suitable means for generating electricity. The source may comprise a local storage device such as arechargeable battery 64. The source is connected by acircuit 68 to the devices 58.1 to 58.n, to power and drive same. Photoswitches similar to switch 26 inFIGS. 2 and 3 may be provided on the stud bodies in series with the respective LED's 58.1 to 58.n, to ensure that the LED is energized only when the photoswitch is illuminated by the head lights of approaching traffic. - In
FIG. 7 there is shown an alternative stud designated 70. Thestud 70 comprises abody 72 and the body is configured to receive atface 74 thereof light impinging in direction A and to transmit and/or reflect the light through the body and beyondface 76 thereof in direction A. The body may be transparent or translucent. Alternatively, the body may comprise a mirror arrangement for receiving and reflecting the impinging light in direction A. The body may further comprise fluorescent and/or phosphorescent means. - A
sign 80 according to the invention may be provided on a carrier vehicle as shown at 80 inFIG. 8 . In the diagram the sign is shown where it is mounted on a rear end of thecarrier vehicle 82. However, at least part of the sign, for example the light emitting devices thereof, may be mounted on other parts of the carrier vehicle, such as on thesides 85 thereof. Thesign 80 comprises at least onephotodetector 84 connected by an electrical circuit (not shown) to at least one light emittingdevices 86. When illuminated by the head lights of a following vehicle for example, thedetector 84 causes the light emitting devices to be energized, to emit visible signals towards a driver of the following vehicle and/or even a third vehicle. Especially when the light emitting devices are mounted on the sides of the carrier vehicle, they may, when energized, make the carrier vehicle better visible to the driver of another vehicle, including the driver of a third vehicle being driven in another direction. - In other applications, a similar arrangement may be used on road side markers or furniture to demarcate a hazardous area or section on a road.
- The light emitting devices in all of the aforementioned embodiments may emit light in the red or orange or green parts of the visible spectrum. In other embodiments broad spectrum white light may be emitted.
- The aforementioned electrical circuits may comprise means for pulsing energization of the light emitting devices intermittently, including periodically.
Claims (14)
1. A road sign (20, 40, 50, 80) comprising:
a body (22, 42, 56, 85);
a photodetector (26, 84) on the body,
the photodetector being configured on the body to be sensitive to illumination by headlights of a first vehicle (16) approaching the body in a first direction;
the photodetector being connected in a circuit (32, 68) on the body also comprising a light emitting device (30, 58.1, 86);
the circuit being configured to energize the light emitting device in response to illumination of the photodetector by the head lights of the first vehicle (16); and
the light emitting device (30, 58.1, 86) being mounted on the body to enhance visibility of the body (22, 42, 56, 85) for a driver of a second vehicle (18) being driven in a direction (B) other than the first direction (A).
2. A road sign as claimed in claim 1 , wherein the body comprises the body of a vehicle carrying the sign.
3. A road sign as claimed in claim 1 , wherein the sign is in the form of a road side marker.
4. A road sign as claimed in claim 1 , wherein the sign is a road surface mountable stud and wherein the body is configured to be mounted on a road surface.
5. A road sign as claimed in claim 1 , wherein the photodetector is a photoswitch connecting the light emitting device to a power supply.
6. A road sign as claimed in claim 5 , wherein the power supply is externally of the body.
7. A road sign as claimed in claim 5 , wherein at least part of the power supply is mounted on the body of the sign.
8. A road sign as claimed in claim 5 , wherein the power supply comprises a photosensitive power source and a charge storage device.
9. A road sign as claimed in claim 1 , wherein the photodetector is connected to the light emitting device to act as power supply and to power the light emitting device upon illumination of the photodetector.
10. A road sign as claimed in claim 9 , wherein a photoswitch is connected in the circuit with the photodetector and the light emitting device.
11. A road sign as claimed in claim 1 , wherein the photodetector is mounted on one sidewall of the body and the light emitting device is mounted on another sidewall of the body.
12. A road sign as claimed in claim 11 , wherein a retro-reflector is mounted on at least one of said one sidewall and said other sidewall of the body.
13. A road sign as claimed in claim 1 , wherein the light emitting device transmits light in one of the red, orange and green parts of the visible spectrum.
14. A method of signaling to traffic on a road, the method comprising the steps of;
providing a road sign (20) comprising a body (22) carrying a photodetector (26) and an electrical circuit (32) connecting the photodetector to a light emitting device (30) on the body;
utilizing impinging light emitted by headlights of a first vehicle (16) traveling in a first direction (A) to cause the photodetector to cause energization of the light emitting device; and
causing the light emitting device to emit light in a direction wherein visibility of the body (22) is enhanced for a driver of another vehicle (18) which is being driven in a direction (B) other than the first direction (A).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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ZA2004/5887 | 2004-07-23 | ||
ZA200405887 | 2004-07-23 | ||
PCT/IB2005/050250 WO2006011064A1 (en) | 2004-07-23 | 2005-01-21 | Stud for roads |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080030978A1 true US20080030978A1 (en) | 2008-02-07 |
Family
ID=34959992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/632,606 Abandoned US20080030978A1 (en) | 2004-07-23 | 2005-01-21 | Stud for Roads |
Country Status (3)
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---|---|
US (1) | US20080030978A1 (en) |
EP (1) | EP1778921A1 (en) |
WO (1) | WO2006011064A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10156636B1 (en) * | 2017-12-18 | 2018-12-18 | Easton Scientific, Inc | Autonomous vehicle dual traffic reflector detector with information transmittal |
US10155475B1 (en) * | 2017-12-04 | 2018-12-18 | Easton Scientific, Inc. | Autonomous vehicle dual traffic reflector detector |
US20190084478A1 (en) * | 2015-08-05 | 2019-03-21 | Wirtgen Gmbh | Automotive Construction Machine And Method For Displaying The Surroundings Of An Automotive Construction Machine |
US10539964B2 (en) * | 2017-12-04 | 2020-01-21 | Easton Scientific, Inc. | Autonomous vehicle dual traffic reflector detector with wireless transmissions |
EP4124691A1 (en) | 2021-07-30 | 2023-02-01 | Pavnext - Technological Pavements, LDA | Device for road signalling and operation method thereof |
KR20230057032A (en) | 2021-10-21 | 2023-04-28 | 이승호 | Road stud |
KR20230060760A (en) | 2021-10-28 | 2023-05-08 | 주식회사 루멘에어텍 | Road stud |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2491302B (en) * | 2010-03-09 | 2013-04-10 | Clearview Traffic Group Ltd | Improved road studs |
GB2478560B (en) * | 2010-03-09 | 2012-10-31 | Clearview Traffic Group Ltd | Improved road studs |
KR101899492B1 (en) * | 2016-07-20 | 2018-09-19 | 주식회사 에이치비인더스트리 | Apparatus for controlling operation of Road Stud |
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2005
- 2005-01-21 US US11/632,606 patent/US20080030978A1/en not_active Abandoned
- 2005-01-21 WO PCT/IB2005/050250 patent/WO2006011064A1/en active Application Filing
- 2005-01-21 EP EP05702744A patent/EP1778921A1/en not_active Withdrawn
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US5984570A (en) * | 1998-03-13 | 1999-11-16 | Parashar; Amish | Self energized automatic surface marker |
US6422714B1 (en) * | 1999-02-11 | 2002-07-23 | David Hubbell | Illuminated, solar powered, vehicle activated, traffic sign |
US20040175232A1 (en) * | 2003-03-07 | 2004-09-09 | Hunter Charles Eric | Emissive highway markers |
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US20190084478A1 (en) * | 2015-08-05 | 2019-03-21 | Wirtgen Gmbh | Automotive Construction Machine And Method For Displaying The Surroundings Of An Automotive Construction Machine |
US10155475B1 (en) * | 2017-12-04 | 2018-12-18 | Easton Scientific, Inc. | Autonomous vehicle dual traffic reflector detector |
US10539964B2 (en) * | 2017-12-04 | 2020-01-21 | Easton Scientific, Inc. | Autonomous vehicle dual traffic reflector detector with wireless transmissions |
US10156636B1 (en) * | 2017-12-18 | 2018-12-18 | Easton Scientific, Inc | Autonomous vehicle dual traffic reflector detector with information transmittal |
EP4124691A1 (en) | 2021-07-30 | 2023-02-01 | Pavnext - Technological Pavements, LDA | Device for road signalling and operation method thereof |
KR20230057032A (en) | 2021-10-21 | 2023-04-28 | 이승호 | Road stud |
KR20230060760A (en) | 2021-10-28 | 2023-05-08 | 주식회사 루멘에어텍 | Road stud |
Also Published As
Publication number | Publication date |
---|---|
WO2006011064A1 (en) | 2006-02-02 |
EP1778921A1 (en) | 2007-05-02 |
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