The states of Arizona, Michigan, Vermont and Washington have announced that they -- in conjunction with the U.S. Department of Homeland Security -- will introduce radio frequency identification (RFID) chips in drivers' licenses. The chips will be able to broadcast the holder's identity to special chip-reading devices.

"Multiple cards can be read at a distance and simultaneously with vicinity RFID technology, allowing an entire car full of people to be processed at once," a DHS fact sheet on the Passport Card technology explained.

The new licenses will also allow holders to cross the border without a passport when new regulation are enacted in January 2008. According to theNewspaper.com, the licenses can store the motorist's name, date of birth, height, weight and identity number, as well as access to additional personal information stored in the department of motor vehicles' database.

The new licenses will be initially launched as a voluntary program, but will likely soon be mandatory.