The Bureau of Transportation Statistics of the U.S. Department of Transportation released June North American Free Trade Agreement freight numbers showing that trucks carried 60.7% of the $93.5 billion of freight moved in June 2013 between the United States and its NAFTA partners, Canada and Mexico.

Trucks were followed by rail at 15.8%, vessels at 8.2%, pipelines at 6.5% and air at 3.9%.
 
BTS, a part of the Department’s Research and Innovative Technology Administration, reported that the surface transportation modes of truck, rail and pipeline carried 83% of the total NAFTA freight flows, $77.6 billion of the total of $93.5 billion carried by all modes, including air and vessel. The value of freight carried by the surface modes in June 2013 declined 1% percent from June 2012, compared to the 0.8% decrease for all modes. Freight value on all modes rose 56.7% from June 2009.
 
For freight flows with Canada, trucks carried 56%t of the $52.7 billion of the freight, followed by rail at 16.8%, pipelines at 10.8%, vessel at 5.5% and air at 4.5%. The surface transportation modes of truck, rail and pipeline carried 83.7% of the total U.S.-Canada freight flows.
 
For freight flows with Mexico in June, trucks carried 66.8% of the $40.8 billion of the freight, followed by rail at 14.5%, vessel at 11.7%, air at 3.2% and pipeline at 0.9%. The surface transportation modes of truck, rail and pipeline carried 82.1% of the total U.S.-Mexico freight flows.