The North American Free Trade Agreement (NAFTA) freight numbers released by the Bureau of Transportation Statistics (BTS) of the U.S. Department of Transportation showed that trucks carried 60.6 percent of the $99.0 billion of freight moved in April 2013 between the U.S. and its NAFTA partners, Canada and Mexico. Rail came in second at 15.1 percent followed by vessels at 9.2 percent, pipelines at 6.8 percent and air at 3.8 percent. The surface transportation modes of truck, rail and pipeline carried 82.5 percent of the total NAFTA freight flows.
For freight flows with Canada, according to the BTS, trucks carries 55.2 percent of the $54.7 billion of freight, followed by rail at 17.2 percent, pipelines at 11.7 percent, vessels at 6.0 percent and air at 4.6 percent. Truck, rail and pipeline modes carried 84.0 percent of total U.S. -Canada freight flows.