| US 7,576,661 B2 | ||
| Traffic information calculation device, traffic information calculation method, traffic information display method, and traffic information display device | ||
| Makoto Mochizuki, Yokohama (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 10/587,783 PCT Filed Feb. 04, 2005, PCT No. PCT/JP2005/002087 § 371(c)(1), (2), (4) Date Jul. 28, 2006, PCT Pub. No. WO2005/078679, PCT Pub. Date Aug. 25, 2005. |
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| Claims priority of application No. 2004-036377 (JP), filed on Feb. 13, 2004; and application No. 2005-012317 (JP), filed on Jan. 20, 2005. | ||
| Prior Publication US 2007/0171095 A1, Jul. 26, 2007 | ||
| Int. Cl. G08G 1/09 (2006.01); G08G 1/123 (2006.01); B60Q 1/00 (2006.01) | ||
| U.S. Cl. 340—905 [340/995.13; 340/995.19; 701/117; 701/118] | 6 Claims |
| 1. A traffic information calculation device, comprising:
vehicle information acquisition unit configured to acquire vehicle information from a plurality of vehicles, the vehicle information
including positions of the plurality of vehicles, and times at which the positions of the plurality of vehicles are acquired;
branch determination unit configured to determine a direction of a vehicle of the plurality of vehicles exiting an intersection
based on (1) a position of the intersection stored in a map database and (2) the vehicle information of the vehicle, the vehicle
capable of exiting the intersection in more than two directions; and
intersection traffic information calculation unit configured to calculate, from the vehicle information of the plurality of
vehicles, a waiting time or a jam length at the intersection for each of the more than two directions.
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