06862524 is referenced by 273 patents and cites 25 patents.

System and methods for determining and disseminating current traffic information and/or route information are presented. For example, in accordance with one embodiment of the present invention, traffic condition information is collected from mobile units that provide their location or position information. The traffic condition may be determined, for example, based on the difference between the velocity of each mobile unit and the speed limit corresponding to their location. Furthermore, the fastest routes between two locations may be determined and provided based on historical and/or current conditions and provided to a mobile unit. In accordance with another embodiment of the present invention, route information may be utilized to determine whether a mobile unit (e.g., associated with a vehicle) is allowed or prohibited from traveling along a certain route.

Title
Using location data to determine traffic and route information
Application Number
10/436114
Publication Number
6862524 (B1)
Application Date
May 9, 2003
Publication Date
March 1, 2005
Inventor
James D Fay
Palo Alto
CA, US
Xinnong Yang
Shanghai
CN
Rodric C Fan
Fremont
CA, US
Julia Howlett
San Jose
CA, US
Wenbin Li
Newark
CA, US
Paresh Nagda
Fremont
CA, US
Agent
Greg J Michelson
MacPherson Kwok Chen & Heid
Assignee
At Road
CA, US
IPC
G08G 001/123
G06F 015/50
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