(Commodity Flow Survey Data Only)
|Less than 100||356||435|
|100 to 250||808||898|
|250 to 999||1,065||1,231|
|1,000 or more||1,968||2,088|
NOTE: Shipments are grouped into distance categories based on Great Circle Distance (GCD), GCD is the shortest distance between 2 points on the surface of a sphere.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, based on data from the 1993, 1997, and 2002 Commodity Flow Survey, December 2004.