March 2012 thus became the highest month for North American Free Trade Agreement (NAFTA) trade value since collection of data began with the trade accord's entry into effect on Jan. 1 1994, exceeding $85bn for the first time and topping the previous all-time monthly trade record of $80.8bn in March 2011, according to the U.S. DOT's Bureau of Transportation Statistics (BTS).

U.S.-Canada and U.S.-Mexico surface transportation trade in March 2012 both increased compared to March 2011, with U.S.-Canada trade reaching $50.1bn, a 2.9-percent increase, and U.S.-Mexico trade reaching $35.7bn, an 11.2-percent increase.

Source: North America's Corridor Coalition