PCOL writes "The Baltimore Sun reports that Delcan technology will soon begin fullscale deployment of a system in Maryland that will mine cellphone data to determine traffic conditions such as jams and slowdowns. As long as a user's phone is turned on, the cellphone network notes the time of handoffs from cell to cell to calculate the location and speed of vehicles. Researchers say the program will reduce congestion by quickly delivering alerts on road conditions to drivers. The company says they will not track the movement of individual drivers. However, a staff attorney for the EFF says that tracking might violate federal law and 'increases the chances that information will be used for more invasive purposes in the future.'"