Figure 8
Freight Shipments by Distance Shipped: 1993, 1997, and 2002*

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(Commodity Flow Survey Data Only)

KEY: * 2002 data are preliminary.

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.
Ton-miles estimates are based on estimated distances traveled along a modeled transportation network.

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, based on the 1993, 1997, and preliminary 2002 Commodity Flow Survey data.