Information obtained from UC Berkeley

Mobile Millennium is a partnership between Nokia, NAVTEQ, and UC Berkeley, based at the California Center for Innovative Transportation (CCIT), a deployment-focused research center at Berkeley's Institute of Transportation Studies. It is supported by the U.S. Department of Transportation's SafeTrip-21 Initiative and the California Department of Transportation.
Researchers from Nokia and Berkeley have constructed an unprecedented traffic monitoring system capable of fusing GPS data from cell phones with data from existing traffic sensors. The research and development phase of this project was dubbed Mobile Millennium for the potential thousands of early adopters who will participate in the pilot deployment, launching in early November, 2008.

More Info