"Table 1-56:  U.S. Hazardous Materials Shipments by Transportation Mode, 2002",,,,,,,
,Value,,Tons,,Ton-miles,,Average miles per shipment
Transportation mode ,($ billion),Percent,(millions),Percent,(billions),Percent,
TOTAL all modes,660.2,100.0,"2,191.5",100.0,326.7,100.0,136
"Single modes, total",644.5,97.6,"2,158.5",98.5,311.9,95.5,105
Trucka,419.6,63.6,"1,159.5",52.9,110.2,33.7,86
For-hire,189.8,28.8,449.5,20.5,65.1,19.9,285
Privateb,226.7,34.3,702.2,32.0,44.1,13.5,38
Rail,31.3,4.7,109.4,5.0,72.1,22.1,695
Water,46.9,7.1,228.2,10.4,70.6,21.6,S
Air,1.6,0.2,0.1,?,0.1,?,"2,080"
Pipelinec,145.0,22.0,661.4,30.2,S,S,S
"Multiple modes, total",9.6,1.5,18.7,0.9,12.5,3.8,849
"Parcel, U.S. Postal Service or Courier",4.3,0.6,0.2,–,0.1,–,837
Other,5.4,0.8,18.5,0.8,12.4,3.8,"1,371"
"Unknown and other modes, total",6.1,0.9,14.2,0.6,2.3,0.7,57
KEY:  – = less than 1 unit of measure or equal to zero; S = data are not published because of high sampling variability or other reasons. ,,,,,,,
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"a Truck as a single mode includes shipments that went by private truck only, for-hire truck only, or a combination of both.",,,,,,,
b Private truck refers to a truck operated by a temporary or permanent employee of an establishment or the buyer/receiver of the shipment.,,,,,,,
c Excludes most shipments of crude oil.  See previous table for the estimated amount of crude oil and petroleum products transported in the United States.,,,,,,,
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NOTE,,,,,,,
Numbers may not add to totals due to rounding.,,,,,,,
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SOURCE,,,,,,,
"U.S. Department of Transportation, Bureau of Transportation Statistics,  U.S. Department of Commerce, Census Bureau, 2002 Economic Census, Transportation, 2002 Commodity Flow Survey, Hazardous Materials (Washington, DC: December 2004), table 1a.",,,,,,,