Table 20,,,,,
"U.S. Domestic Freight Shipments by Mode: 
Preliminary 2002",,,,,
(Commodity Flow Survey data only),,,,,
Mode,"Value
($ billions)","Tons
(millions)","Ton-miles
(billions)",,
Total,"8,483","11,573","3,204",,
Truck (for-hire and private),"6,200","7,622","1,311",,
Rail,320,"1,817","1,199",,
Water,91,714,323,,
Air (includes truck and air) ,279,4,6,,
Pipelinea,162,722, S,,
Intermodal totalb,"1,111",198,215,,
"Parcel, postal, and courier services","1,022",26,21,,
Truck and rail, S , S , S ,,
Other intermodal combinations,26,131,147,,
Unknown,319,496,77,,
a Estimates of pipeline exclude shipments of crude petroleum.,,,,,
"b Includes a combination of parcel, postal, and courier services; truck and rail; and other intermodal combinations, including truck and water and rail and water.  Excludes truck and air combination, which is added to air transportation.",,,
Key: S = withheld due to high sampling variability or poor response quality.,,,
"Note: The data presented in this table exclude shipments from the following establishments classified in the North American Industry Classification System (NAICS) as: farms, forestry, logging, fisheries, construction, publishing, and crude petroleum production; households; governments; and most retail and service businesses. Also excluded are most imports and commodities shipped from a foreign location to another foreign destination that pass through the United States.",,,
"Source: U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, “2002 Economic Census: Transportation Commodity Flow Survey, Preliminary Report,” December 2003.",,,