BTS, a part of the Research and Innovative Technology Administration, reported on Tuesday, May 29, that the March value increased 9.8 percent from February; month-to-month changes can be affected by seasonal variations and other factors. The value increased by 88.2 percent compared to March 2002; imports in March were up 76.1 percent, while exports were up 104.5 percent.
U.S.-Canada trade reached $50.1 billion in March, a 2.9 percent increase, and U.S.-Mexico trade reached $35.7 billion, an 11.2 percent increase. Michigan led all states in surface trade with Canada at $6.3 billion, a 3.0 percent increase from March 2011. Texas led all states in surface trade with Mexico at $12.6 billion, an 11.5 percent increase from March 2011.

Surface transportation includes freight movements by truck, rail, pipeline, mail, Foreign Trade Zones and other modes of transport. In March, 86.2 percent of U.S. trade by value with Canada and Mexico moved via land, 9.8 percent moved by vessel, and 4.0 percent moved by air.