System and method for determining traffic conditions

• US 7,439,853 B2
• Filed: 03/31/2005
• Issued: 10/21/2008
• Est. Priority Date: 03/31/2005
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Technical Center North America Incorporated (Nissan Motor Co., Ltd.)
• Inventors: Tengler, Steve, Heft, Ron
• Primary Examiner(s): Bugg; George A
• Assistant Examiner(s): Lu; Shirley
• Application Number:
  US11/094,345
• Publication Number:
  US 20060226968A1
• Time in Patent Office: 1,300 Days
• Field of Search: 340/466, 340/901, 340/905, 340/988, 701117-119
• US Class Current: 340/466
• CPC Class Codes: B60W 2554/00 Input parameters relating to objects
• CPC Class Codes: G08G 1/052 with provision for determining speed or overspeed speed measuring in general G01P
• CPC Class Codes: G08G 1/096716 where the received information does not generate an automatic action on the vehicle control
• CPC Class Codes: G08G 1/096741 where the source of the transmitted information selects which information to transmit to each vehicle
• CPC Class Codes: G08G 1/096775 where the origin of the information is a central station

Abstract

A system and method for determining a traffic condition of a vehicle includes receiving status information of a plurality of vehicles, the status information including at least a speed of the respective vehicle. An average speed is determined according to the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition. An indication of the determined average speed is provided to a driver of a first vehicle.

Claims

1. A method for determining a traffic condition of a vehicle, comprising:

receiving status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed;

determining an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

providing an indication of the determined average speed to a driver of a first vehicle;

wherein the status information is directly transmitted from at least a second vehicle to the first vehicle;

wherein the status information further includes a geographic vehicle location, the method further comprising;

applying a weighting to a respective speed of each of the first group of vehicles in accordance with a geographic vehicle location of each of the first group of vehicles,

wherein the average speed is determined in accordance with the respective weighted speed of each of the first group of vehicles.

2. A method according to claim 1, wherein the first condition is that each of the first group of vehicles is positioned in front of the first vehicle and on the same roadway.

3. A method according to claim 1, wherein the first condition is that each of the first group of vehicles is positioned in front of the first vehicle in the same lane of the same roadway.

4. A method according to claim 1, wherein the first condition is that each of the first group of vehicles is moving on the same roadway at a vector that is substantially similar to a vector of the first vehicle.

5. A method according to claim 4, wherein the vector of a respective one of the first group of vehicles is substantially similar to the vector of the first vehicle if a difference between the vectors is less than a predetermined difference.

9. A method according to claim 1, wherein the step of providing further includes displaying the determined average speed to the driver of the first vehicle.

10. A method according to claim 9, wherein the step of determining an average speed further includes determining an average speed of vehicles for each of a plurality of lanes of the roadway on which the first vehicle is traveling, and

wherein the step of displaying further includes showing the determined average speed for each of the plurality of lanes of the roadway.

24. A method according to claim 1, wherein the status information has been previously transmitted from at least a third vehicle.

26. A method according to claim 1,

wherein the step of determining the average speed is performed by the first vehicle.

27. A method according to claim 26, wherein the first vehicle determines the traffic condition as the status information is received by the first vehicle.

29. A method according to claim 1, wherein the status information includes vehicle status information that is generated by each of the plurality of vehicles,

wherein the vehicle status information is specific to each of the plurality of vehicles.

31. A method according to claim 1, wherein the status information is transmitted from the first vehicle to a road side unit, wherein the status information is transmitted from the road side unit to a traffic operation center,

wherein the status information is transmitted from the traffic operation center to the road side unit or another road side unit, wherein the status information is transmitted from the road side unit or the another road side unit to a receiving vehicle,

wherein the step of determining the average speed is performed by the receiving vehicle.

32. A method according to claim 1, wherein the status information is transmitted from the first vehicle to a road side unit, wherein the status information is transmitted from the road side unit to a traffic operation center,

wherein the step of determining the average speed is performed by the traffic operation center,

wherein the status information is transmitted from the traffic operation center to the road side unit or another road side unit, wherein the status information is transmitted from the road side unit or the another road side unit to a receiving vehicle.

36. A method according to claim 29, wherein the first vehicle generates vehicle status information that is specific to the first vehicle,

wherein the first vehicle transmits status information including the vehicle status information generated by the first vehicle and vehicle status information generated by the plurality of vehicles.

6. A method for determining a traffic condition of a vehicle, comprising:

receiving status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed;

determining an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition;

providing an indication of the determined average speed to a driver of a first vehicle;

wherein the status information further includes a vehicle location of the respective vehicle, the method further comprising;

applying a weighting to a respective speed of each of the first group of vehicles in accordance with a vehicle location of each of the first group of vehicles,

wherein the average speed is determined in accordance with the respective weighted speed of each of the first group of vehicles, and

determining a distance between the first vehicle and each of the first group of vehicles based on the location of the respective vehicle with respect to a location of the first vehicle,

wherein the weighting applied to a respective speed increases as the corresponding determined distance increases.

7. A method for determining a traffic condition of a vehicle, comprising:

receiving status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed;

determining an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

providing an indication of the determined average speed to a driver of a first vehicle;

wherein the status information is directly transmitted from at least a second vehicle to the first vehicle;

determining a distance between the first vehicle and each of the first group of vehicles based on the location of the respective vehicle with respect to a location of the first vehicle,

wherein the first condition is that each of the first group of vehicles is in the same lane of the same roadway and positioned in front of the first vehicle, and

wherein the average speed is determined in accordance with the equation;

LS_x=Σ

(d_i*s_i/d_ƒ

)

wherein LS_x is the average speed in lane x, x being a lane in which each of the first group of vehicles is traveling, d1 is the distance from the first vehicle to a respective one of the first group of vehicles, s, is the speed of a respective one of the first group of vehicles, and d_ƒ

is the sum of the distances from the first vehicle to each of the first group of vehicles.

8. A method for determining a traffic condition of a vehicle, comprising:

receiving status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed;

determining an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

providing an indication of the determined average speed to a driver of a first vehicle;

wherein the status information is directly transmitted from at least a second vehicle to the first vehicle;

determining a distance between the first vehicle and each of the first group of vehicles based on the location of the respective vehicle with respect to a location of the first vehicle,

determining a second group of vehicles from the first group o f vehicles satisfying a second condition,

wherein the first condition is that each of the first group of vehicles is in the same lane of the same roadway and positioned in front of the first vehicle,

wherein the second condition is that each of the second group of vehicles is a specific type of vehicle, and wherein the average speed is determined in accordance with the equation;

LS_x=[Σ

(d_i*s_i/d_if)+C_j*(Σ

(d_j*s_j/d_jf)]/(1+C_j)

wherein LS_x is the average speed in lane x, x being the lane in which each of the first group of vehicles is traveling, d_i is the distance from the first vehicle to a respective one of the first group of vehicles, s_i is the speed of a respective one of the first group of vehicles, d_if is the sum of the distances from the first vehicle to each of the first group of vehicles, C_j is a weighting factor for the second group of vehicles, d_i is the distance from the first vehicle to a respective one of the second group of vehicles, sj is the speed of a respective one of the second group of vehicles, and d_jf is the sum of the distances from the first vehicle to each of the second group of vehicles.

11. A vehicle configured to determine a traffic condition of a roadway, comprising:

a receiver that receives status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed, wherein the vehicle is a first vehicle, wherein the receiver is configured to receive status information that is directly transmitted from at least a second vehicle to the first vehicle;

a processor;

a memory, coupled to the processor, the memory comprising a plurality of instructions executed by the processor, the plurality of instructions including an instruction to determine an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

a display that provides an indication of the determined average speed to a driver of the first vehicle;

wherein the status information further includes a geographic vehicle location, the memory further comprising an instruction configured to apply a weighting to a respective speed of each of the first group of vehicles in accordance with a geographic vehicle location of each of the first group of vehicles,

wherein the average speed is determined in accordance with the respective weighted speed of each of the first group of vehicles.

12. A vehicle according to claim 11, wherein the first condition is that each of the first group of vehicles is positioned in front of the vehicle and on the same roadway.

13. A vehicle according to claim 11, wherein the first condition is that each of the first group of vehicles is positioned in front of the vehicle in the same lane of the same roadway.

14. A vehicle according to claim 11, wherein the first condition is that each of the first group of vehicles is moving on the same roadway along a vector that is substantially similar to a vector of the vehicle.

15. A vehicle according to claim 14, wherein the vector of a respective one of the first group of vehicles is substantially similar to the vector of the vehicle if a difference between the vectors is less than a predetermined difference.

19. A vehicle according to claim 11, the memory further comprising an instruction configured to display the determined average speed to the driver of the vehicle.

20. A vehicle according to claim 11, wherein the memory further comprises instructions configured to:

determine an average speed of vehicles for each of a plurality of lanes of the roadway on which the vehicle is traveling; and

display the determined average speed for each of the plurality of lanes of the roadway to the driver of the vehicle.

25. A vehicle according to claim 11, wherein the receiver is configured to receive status information that has been previously transmitted from at least a third vehicle.

28. A vehicle according to claim 11, wherein the vehicle is configured to determine the traffic condition as the status information is received by the first vehicle.

30. A vehicle according to claim 11, wherein the receiver is configured to receive status information that includes vehicle status information that is generated by each of the plurality of vehicles,

wherein the vehicle status information is specific to each of the plurality of vehicles.

33. A vehicle according to claim 11, wherein the receiver is configured to receive status information that has been transmitted from the first vehicle to a road side unit, from the road side unit to a traffic operation center, from the traffic operation center to the road side unit or another road side unit, and from the road side unit or the another road side unit to a receiving vehicle.

34. A vehicle according to claim 33, wherein status information includes the average vehicle speed, which has been determined by the traffic operation center.

35. A vehicle according to claim 11,

wherein the processor and the memory of the first vehicle are configured to determine the average vehicle speed.

37. A vehicle according to claim 30, wherein the memory further comprises an instruction to generate vehicle status information for the first vehicle,

wherein the memory comprises an instruction to transmit status information including the vehicle status information generated by the first vehicle and vehicle status information generated by the plurality of vehicles.

16. A vehicle configured to determine a traffic condition of a roadway, comprising:

a receiver that receives status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed;

a processor;

a memory, coupled to the processor, the memory comprising a plurality of instructions executed by the processor, the plurality of instructions including an instruction to determine an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

a display that provides an indication of the determined average speed to a driver of the vehicle,

wherein the status information further includes a vehicle location, the memory further comprising an instruction configured to apply a weighting to a respective speed of each of the first group of vehicles in accordance with a vehicle location of each of the first group of vehicles,

wherein the average speed is determined in accordance with the respective weighted speed of each of the first group of vehicles,

the memory further comprising an instruction configured to determine a distance between the vehicle and each of the first group of vehicles based on the location of the respective vehicle with respect to a location of the vehicle,

wherein the weighting applied to a respective speed increases as the corresponding determined distance increases.

17. A vehicle configured to determine a traffic condition of a roadway, comprising,

a receiver that receives status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed, wherein the vehicle is a first vehicle, wherein the receiver is configured to receive status information that is directly transmitted from at least a second vehicle to the first vehicle;

a processor;

a memory, coupled to the processor, the memory comprising a plurality of instructions executed by the processor, the plurality of instructions including an instruction to determine an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

a display that provides an indication of the determined average speed to a driver of the first vehicle;

the memory further comprising an instruction configured to determine a distance between the vehicle and each of the first group of vehicles based on a vehicle location of each of the first group of vehicles with respect to a location of the vehicle,

wherein the first condition is that each of the first group of vehicles is in the same lane of the same roadway and positioned in front of the vehicle, and

wherein the average speed is determined in accordance with the equation;

LS_x=Σ

(d_i*s_i/d_ƒ

)

wherein LS_x is the average speed in lane x, x being a lane in which each of the first group of vehicles is traveling, d, is the distance from the vehicle to a respective one of the first group of vehicles, s, is the speed of a respective one of the first group of vehicles, and d_ƒ

is the sum of the distances from the vehicle to each of the first group of vehicles.

18. A vehicle configured to determine a traffic condition of a roadway, comprising:

a receiver that receives status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed, wherein the vehicle is a first vehicle, wherein the receiver is configured to receive status information that is directly transmitted from at least a second vehicle to the first vehicle;

a processor;

a memory, coupled to the processor, the memory comprising a plurality of instructions executed by the processor, the plurality of instructions including an instruction to determine an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

a display that provides an indication of the determined average speed to a driver of the first vehicle;

the memory further comprising instructions configured to;

determine a distance between the vehicle and each of the first group of vehicles based on the location of the respective vehicle with respect to a location of the vehicle; and

determine a second group of vehicles from the first group of vehicles satisfying a second condition,

wherein the first condition is that each of the first group of vehicles is in the same lane of the same roadway and positioned in front of the vehicle,

wherein the second condition is that each of the second group of vehicles is a specific type of vehicle, and

wherein the average speed is determined in accordance with the equation;

LS_x=[Σ

(d_i*s_i/d_iƒ

)+C_j*(Σ

(d_j*s_j/d_jƒ

)]/(1+C_j)

wherein LS_x is the average speed in lane x, x being the lane in which each of the first group of vehicles is traveling, d_i is the distance from the vehicle to a respective one of the first group of vehicles, s_i is the speed of a respective one of the first group of vehicles, d_if is the sum of the distances from the vehicle to each of the first group of vehicles, C_j is a weighting factor for the second group of vehicles, d_j is the distance from the vehicle to a respective one of the second group of vehicles, s_j is the speed of a respective one of the second group of vehicles, and d_jf is the sum of the distances from the vehicle to each of the second group of vehicles.

21. A method for determining a traffic condition of a vehicle, comprising:

receiving status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed;

determining an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

providing an indication of the determined average speed to a driver of a first vehicle;

wherein the status information is directly transmitted from at least a second vehicle the first vehicle;

wherein the status information further includes a geographic vehicle location, the method further comprising;

applying a weighting to a respective speed of each of the first group of vehicles in accordance with a geographic vehicle location of each of the first group of vehicles,

wherein the average speed is determined in accordance with the respective weighted speed of each of the first group of vehicles;

determining a distance between the first vehicle and each of the first group of vehicles based on the vehicle location of each of the first group of vehicles with respect to a location of the first vehicle,

wherein the weighting applied to a respective speed increases as the corresponding determined distance increases.

22. A vehicle configured to determine a traffic condition of a roadway, comprising:

a receiver that receives status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed, wherein the vehicle is a first vehicle, wherein the receiver is configured to receive status information that is directly transmitted from at least a second vehicle to the first vehicle;

a processor;

a memory, coupled to the processor, the memory comprising a plurality of instructions executed by the processor, the plurality of instructions including an instruction to determine an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

a display that provides an indication of the determined average speed to a driver of the first vehicle;

wherein the status information further includes a vehicle location, the memory further comprising an instruction configured to apply a weighting to a respective speed of each of the first group of vehicles in accordance with a vehicle location of each of the first group of vehicles,

wherein the average speed is determined in accordance with the respective weighted speed of each of the first group of vehicles,

the memory further comprising an instruction configured to determine a distance between the vehicle and each of the first group of vehicles based on the vehicle location of each of the first group of vehicles with respect to a location of the vehicle,

wherein the weighting applied to a respective speed increases as the corresponding determined distance increases.

23. A method for determining a traffic condition of a vehicle, comprising:

receiving status information of a plurality of vehicles, the status information transmitted from the plurality of vehicles including at least a speed;

determining an average speed based on the speed included in the status information of a first group of vehicles among the plurality of vehicles satisfying a first condition; and

providing an indication of the determined average speed to a driver of a first vehicle;

wherein the status information further includes a geographic vehicle location, the method further comprising;

applying a weighting to a respective speed of each of the first group of vehicles in accordance with a geographic vehicle location of each of the first group of vehicles,

wherein the average speed is determined in accordance with the respective weighted speed of each of the first group of vehicles.