Brits to get RFID-chipped license plates - Engadget - www.engadget.com

"The UK Department for Transport just gave the go-ahead for a trial of new, RFID-enabled license plates aimed to make vehicles trackable in Britain. Unlike passive RFID which only transmits over short distances, the e-Plate licenses use active RFID technology to transmit vehicle identification numbers and other data to readers over 300 feet away."