The Commodity Flow Survey (CFS) comes out every five years and is the primary source of national and state-level data on domestic freight shipments by American establishments in mining, manufacturing, wholesale, auxiliaries, and selected retail industries.

You heard Bureau of Transportation Statistics Freight Analyst Ron Duych give an overview of the survey on the Dave Nemo Show. 

Visit this link to check out a survey overview and methodology of the 2007 Commodity Flow Survey.

And click here for a table of the shipment characteristics by mode of transportation for the United States.