Signs showing an integrated North America have begun showing up on U.S. Interstate highways for NORPASS, a new electronic system that allows participating truckers in Canada and the U.S. to by-pass roadside weigh stations through the use of a transponder mounted on the windshield. The NORPASS website describes the organization as "a partnership of state and provincial agencies and trucking industry representatives who are committed to promoting safe and efficient trucking throughout North America. Truckers that register to participate in NORPASS receive a small transponder that signals to a computer in participating weigh stations. As the participating truck approaches the...