Fact Sheet: Western Hemisphere Travel Initiative (WHTI) Passport Card Technology Choice: Vicinity RFID [October 17, 2006] [open pdf - 11KB]
This fact sheet outlines ways of facilitating and securing travel and trade in the United States. "The Department of Homeland Security proposes to expand the use of vicinity radio frequency identification (RFID) technology at land border ports of entry. The use of this technology will be a key component of the PASS System (People, Access Security Service)."
Dept. of Homeland Security: http://www.dhs.gov