Dynamic road markers to provide visual feedback as to vehicle speed

• US 8,704,676 B2
• Filed: 08/09/2011
• Issued: 04/22/2014
• Est. Priority Date: 08/09/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Hawkes, Philip, Brown, Craig M.
• Primary Examiner(s): Crosland, Donnie
• Application Number:
  US13/206,353
• Publication Number:
  US 20130038461A1
• Time in Patent Office: 987 Days
• Field of Search: 340/815.4, 340/936, 340/908.1
• US Class Current: 340/815.4
• CPC Class Codes: E01F 9/559 illuminated
• CPC Class Codes: G08G 1/07 Controlling traffic signals
• CPC Class Codes: G08G 1/087 Override of traffic control, e.g. by signal transmitted by an emergency vehicle

Abstract

Disclosed is an apparatus, system, and method to utilize road markers to control vehicle speeds. The road markers may be commanded to emit a light for a pre-determined period of time. Further, the road markers may be controlled such that they are commanded to emit the light based upon a timing sequence associated with a desired speed so that the road markers emit light in a strobe pattern. In this way, if a vehicle is traveling at the desired speed, then the strobe pattern appears static to a driver of the vehicle. Additionally, a message may be transmitted from a traffic authority to increase or decrease the timing sequence of the strobe pattern to increase or decrease the speed to the desired speed.

Claims

1. A method of utilizing a plurality of road markers to control vehicle speeds comprising:

commanding road markers of the plurality of road markers to emit a light for a pre-determined period of time; and

controlling the commanding of the road markers to emit the light based upon a timing sequence associated with a desired speed such that the road markers emit light in a strobe pattern, such that, if a vehicle is traveling at the desired speed, then the strobe pattern appears static to a driver of the vehicle, wherein, a message from a traffic authority increases or decreases the timing sequence of the strobe pattern to increase or decrease the speed to the desired speed,

wherein each of the road markers individually processes via a processor when to emit the light for the pre-determined period of time such that the road markers emit the light in the strobe pattern based upon the message from the traffic authority.

2. The method of claim 1, wherein, if the vehicle is traveling above the desired speed, the strobe pattern appears to be coming towards the driver of the vehicle.

3. The method of claim 1, wherein, if the vehicle is traveling below the desired speed, the strobe pattern appears to be moving away from the driver of the vehicle.

4. The method of claim 1, wherein, the timing sequence for commanding each road marker to emit a light is controlled such that if D represents the distance between two adjacent road markers, and the desired speed is S, then the light emission of a first road marker occurs at a first time T1 and the light emission of a second adjacent road marker occurs at a second time T2=(T1+D/S).

5. The method of claim 4, wherein the distance (D) is approximately equal to a measured distance along a middle of a lane between a pair of perpendicular lines drawn through adjacent road markers.

6. The method of claim 1, wherein, the traffic authority includes at least one of an emergency vehicle or a traffic management station.

7. The method of claim 6, wherein, the traffic authority is configured to communicate with the road markers to command the road markers to decrease the timing sequence of the strobe pattern to decrease the speed.

8. The method of claim 7, wherein, the traffic authority is configured to communicate to road markers through a road marker gateway.

9. The method of claim 1, wherein a light emission includes a light emission of a particular color to identify a message to a driver.

10. The method of claim 9, wherein, a green color indicates a maximum speed, a yellow color indicates a reduced speed, and a red color indicates a very low speed due to an emergency situation.

11. The method of claim 1, wherein, the road markers communicate with one another through wireless connections, wherein each road marker indicates to their adjacent road marker that it has performed a light emission.

12. The method of claim 1, wherein, the road markers communicate with one another through wired connections, wherein each road marker indicates to their adjacent road marker that it has performed a light emission.

13. The method of claim 1, wherein the light emission is generated by an LED or a reflector.

14. A road marker to control vehicle speeds comprising:

a light emitter to emit a light;

a transmitter;

a receiver to receive a message; and

a processor to;

command the light emitter to emit a light for a pre-determined period of time;

control emitting the light based upon a timing sequence associated with a desired speed such that a road marker emits the light in a strobe pattern with other road markers, such that, if a vehicle is traveling at the desired speed, then the strobe pattern appears static to a driver of the vehicle, wherein, a message from a traffic authority increases or decreases the timing sequence of the strobe pattern to increase or decrease the speed to the desired speed; and

process individually when to emit the light for the pre-determined period of time such that the road marker emits the light in the strobe pattern with other road markers based upon the message from the traffic authority.

15. The road marker of claim 14, wherein, if the vehicle is traveling above the desired speed, the strobe pattern appears to be coming towards the driver of the vehicle.

16. The road marker of claim 14, wherein, if the vehicle is traveling below the desired speed, the strobe pattern appears to be moving away from the driver of the vehicle.

17. The road marker of claim 14, wherein, the timing sequence for commanding each road marker to emit a light is controlled such that if D represents the distance between two adjacent road markers, and the desired speed is S, then the light emission of a first road marker occurs at a first time T1 and the light emission of a second adjacent road marker occurs at a second time T2=(T1+D/S).

18. The road marker of claim 17, wherein the distance (D) is approximately equal to a measured distance along a middle of a lane between a pair of perpendicular lines drawn through adjacent road markers.

19. The road marker of claim 14, wherein, the traffic authority includes at least one of an emergency vehicle or a traffic management station.

20. The road marker of claim 19, wherein, the traffic authority is configured to communicate with the road markers to command the road markers to decrease the timing sequence of the strobe pattern to decrease the speed.

21. The road marker of claim 20, wherein, the traffic authority is configured to communicate to road markers through a road marker gateway.

22. The road marker of claim 14, wherein the light emitter emits a light of a particular color to identify a message to a driver.

23. The road marker of claim 22, wherein, a green color indicates a maximum speed, a yellow color indicates a reduced speed, and a red color indicates a very low speed due to an emergency situation.

24. The road marker of claim 14, wherein, the road markers communicate messages with one another through wireless connections through respective transmitters and receivers, wherein the message from a road marker to an adjacent road marker indicates to the adjacent road marker that it has performed a light emission.

25. The road marker of claim 14, wherein, the road markers communicate messages with one another through wired connections through respective transmitters and receivers, wherein the message from a road marker to an adjacent road marker indicates to the adjacent road marker that it has performed a light emission.

26. The road marker of claim 14, wherein the light emitter is an LED or a reflector.

27. A road marker to control vehicle speeds comprising:

means for receiving a message;

means for commanding emitting a light for a pre-determined period of time;

means for controlling emitting the light based upon a timing sequence associated with a desired speed such that a road marker emits the light in a strobe pattern with other road markers, such that, if a vehicle is traveling at the desired speed, then the strobe pattern appears static to a driver of the vehicle, wherein, a message from a traffic authority increases or decreases the timing sequence of the strobe pattern to increase or decrease the speed to the desired speed; and

means for processing individually when to emit the light for the pre-determined period of time such that the road marker emits the light in the strobe pattern with other road markers based upon the message from the traffic authority.

28. The road marker of claim 27, wherein, if the vehicle is traveling above the desired speed, the strobe pattern appears to be coming towards the driver of the vehicle.

29. The road marker of claim 27, wherein, if the vehicle is traveling below the desired speed, the strobe pattern appears to be moving away from the driver of the vehicle.

30. The road marker of claim 27, wherein, the timing sequence for commanding each road marker to emit a light is controlled such that if D represents the distance between two adjacent road markers, and the desired speed is S, then the light emission of a first road marker occurs at a first time T1 and the light emission of a second adjacent road marker occurs at a second time T2=(T1+D/S).

31. The road marker of claim 30, wherein the distance (D) is approximately equal to a measured distance along a middle of a lane between a pair of perpendicular lines drawn through adjacent road markers.

32. The road marker of claim 27, wherein, the traffic authority includes at least one of an emergency vehicle or a traffic management station.

33. The road marker of claim 32, wherein, the traffic authority is configured to communicate with the road markers to command the road markers to decrease the timing sequence of the strobe pattern to decrease the speed.

34. The road marker of claim 27, wherein the means for emitting a light emits a light of a particular color to identify a message to a driver.

35. The road marker of claim 27, wherein the means for emitting a light is an LED or a reflector.

36. A computer program product comprising:

a computer-readable medium comprising code for;

receiving a message;

controlling emitting a light for a pre-determined period of time;

controlling emitting the light based upon a timing sequence associated with a desired speed such that a road marker emits the light in a strobe pattern with other road markers, such that, if a vehicle is traveling at the desired speed, then the strobe pattern appears static to a driver of the vehicle, wherein, a message from a traffic authority increases or decreases the timing sequence of the strobe pattern to increase or decrease the speed to the desired speed; and

processing individually when to emit the light for the pre-determined period of time such that the road marker emits the light in the strobe pattern with other road markers based upon the message from the traffic authority.

37. The computer program product of claim 36, wherein, if the vehicle is traveling above the desired speed, the strobe pattern appears to be coming towards the driver of the vehicle.

38. The computer program product of claim 36, wherein, if the vehicle is traveling below the desired speed, the strobe pattern appears to be moving away from the driver of the vehicle.

39. The computer program product of claim 36, wherein, the timing sequence for commanding each road marker to emit a light is controlled such that if D represents the distance between two adjacent road markers, and the desired speed is S, then the light emission of a first road marker occurs at a first time T1 and the light emission of a second adjacent road marker at a second time T2=(T1+D/S).

40. The computer program product of claim 39, wherein the distance (D) is approximately equal to a measured distance along a middle of a lane between a pair of perpendicular lines drawn through adjacent road markers.

41. The computer program product of claim 36, wherein, the traffic authority includes at least one of an emergency vehicle or a traffic management station.

42. The computer program product of claim 41, wherein, the traffic authority is configured to communicate with the road markers to command the road markers to decrease the timing sequence of the strobe pattern to decrease the speed.

43. The computer program product of claim 36, wherein the light emission is generated by an LED or a reflector.