REAL TIME TRAFFIC AIDE

• US 20090309757A1
• Filed: 06/16/2008
• Published: 12/17/2009
• Est. Priority Date: 06/16/2008
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (General Motors Company)
• Inventors: Mudalige, Upali Priyantha, Lin, William C., Saraydar, Cem U., Debouk, Rami I.
• Granted Patent: US 7,804,423 B2
• Time in Patent Office: Days
• US Class Current: 340/905
• CPC Class Codes: G08G 1/161 Decentralised systems, e.g. inter-vehicle communication
• CPC Class Codes: G08G 1/164 Centralised systems, e.g. external to vehicles

Abstract

A system and method for providing real-time traffic information using a wireless vehicle-to-vehicle communications network. A vehicle includes a plurality of sensors that detect other vehicles around the vehicle. The wireless communications system on the vehicle uses the sensor signals to calculate a traffic condition index that identifies traffic information around the vehicle. The vehicle broadcasts the traffic condition index to other vehicles and/or road side infrastructure units that can present the information to the vehicle driver, such as in a navigation system, and/or rebroadcast the traffic information to other vehicles. The traffic condition index can be calculated using the speed of the surrounding vehicles, posted speed limits, the distance between the surrounding vehicles and the traffic density of the surrounding vehicles.

Claims

1. A traffic system for providing real-time traffic information from one vehicle to other vehicles, said system comprising:

a plurality of sensors provided on the one vehicle, said sensors detecting surrounding vehicles around the one vehicle; and

a wireless communications system responsive to sensor signals from the sensors, said wireless communications system including a controller that calculates a traffic condition index identifying the traffic around the one vehicle and broadcasting the traffic condition index to the other vehicles, wherein at least one of the other vehicles re-broadcasts the traffic condition index to other vehicles.

2. The traffic system according to claim 1 wherein the controller calculates the traffic condition index using a vehicle speed factor of the speed of the surrounding vehicles, a vehicle distance factor of the distance between the surrounding vehicles and a traffic density factor of the density of the surrounding vehicles.

3. The traffic system according to claim 2 wherein the controller calculates a traffic condition factor that is a sum or a weighted sum of the vehicle speed factor, the vehicle distance factor and the traffic density factor, said traffic condition factor being used to determined the traffic condition index.

4. The traffic system according to claim 3 wherein the traffic condition index is a number based on a comparison of the traffic condition factor to one or more thresholds.

5. The traffic system according to claim 1 where the plurality of sensors include cameras, radar sensors, lidar sensors, radio frequency (RF) range sensors, proximity sensors, wireless devices, GPS receivers and data fusion sensors.

6. The traffic system according to claim 1 wherein the controller presents the traffic condition index in a predetermined format to a driver of the vehicle.

7. The traffic system according to claim 6 wherein the controller presents the traffic condition index to the driver as alternate routes on a navigation system.

8. The traffic system according to claim 1 wherein the wireless communications system also provides information concerning things detected along the vehicle roadway other than traffic.

9. The traffic system according to claim 8 where the other things include hazardous road conditions.

10. The traffic system according to claim 8 wherein the other things include infrastructure along the roadway.

11. A traffic system for providing real-time traffic information from one vehicle to other vehicles, said system comprising:

a plurality of sensors provided on the one vehicle, said sensors detecting surrounding vehicles around the one vehicle; and

a wireless communications system responsive to sensor signals from the sensors, said wireless communications system including a controller that calculates a traffic condition index identifying the traffic around the one vehicle and broadcasting the traffic condition index to the other vehicles, said controller calculating the traffic condition index using a vehicle speed factor of the speed of the surrounding vehicles, a vehicle distance factor of the distance between the surrounding vehicles and a traffic density factor of the density of the surrounding vehicles, said controller presenting the traffic condition index in a predetermined format to a driver of the vehicle, wherein at least one of the other vehicles re-broadcasts the traffic condition index to other vehicles.

12. The traffic system according to claim 11 wherein the controller calculates a traffic condition factor that is a sum or a weighted sum of the vehicle speed factor, the vehicle distance factor and the traffic density factor, said traffic condition factor being used to determined the traffic condition index.

13. The traffic system according to claim 12 wherein the traffic condition index is a number based on a comparison of the traffic condition factor to one or more thresholds.

14. The traffic system according to claim 11 where the plurality of sensors include cameras, radar sensors, lidar sensors, radio frequency (RF) range sensors, proximity sensors, wireless devices, GPS receivers and data fusion sensors.

15. The traffic system according to claim 11 wherein the controller presents the traffic condition index to the driver as alternate routes on a navigation system.

16. The traffic system according to claim 11 wherein the wireless communications system also provides information concerning things detected along the vehicle roadway other than traffic.

17. The traffic system according to claim 16 where the other things include hazardous road conditions.

18. The traffic system according to claim 16 wherein the other things include infrastructure along the roadway.

19. A method for providing real-time traffic information from one vehicle to other vehicles, said method comprising:

detecting surrounding vehicles around the one vehicle using sensors; and

calculating a traffic condition index identifying the traffic density around the one vehicle, wherein calculating the traffic condition index includes using a speed factor of the speed of the surrounding vehicles, a vehicle distance factor of the distance between the surrounding vehicles and a traffic density factor of the density of the surrounding vehicles; and

broadcasting the traffic condition index to the other vehicles, wherein at least one of the other vehicles re-broadcasts the traffic condition index to other vehicles.

20. The method according to claim 19 wherein calculating a traffic condition index includes calculating a traffic condition factor that is a sum or a weighted sum of the vehicle speed factor, the vehicle distance factor and the traffic density factor, said traffic condition factor being used to determined the traffic condition index.