Table 1-52. U.S. Hazardous Materials Shipments by Mode of Transportation, 1997

Table 1-52. U.S. Hazardous Materials Shipments by Mode of Transportation, 1997

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Mode of Transportation Value ($ million) Percent Tons (thousands) Percent Ton-miles (millions) Percent
Single modes452.7 97.1 1,541.7 98.5 258.9 98.1
Trucka 298.2 63.9 869.8 55.6 74.9 28.4
For-hire 134.3 28.8 336.4 21.5 45.2 17.1
Privateb 160.7 34.5 522.7 33.4 28.8 10.9
Rail 33.3 7.1 96.6 6.2 74.7 28.3
Water 27.0 5.8 143.2 9.1 68.2 25.9
Air 8.6 1.8 0.1 -- 0.1 --
Pipelinec 85.7 18.4 432.1 27.6 S S
Multiple modes5.7 1.2 6.0 0.4 3.1 1.2
Parcel, U.S. Postal Service or Courier 2.9 0.6 0.1 -- 0.1 --
Other 2.9 0.6 5.9 0.4 3.0 1.1
Unknown and other modes7.9 1.7 17.5 1.1 1.8 0.7
All modes466.4 100.0 1,565.2 100.0 263.8 100.0

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.

NOTE: Numbers and percents may not add to totals due to rounding.

KEY: S = Data are not published because of high sampling variability or other reasons; -- less than 1 unit of measure or equal to zero.

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, U.S. Department of Commerce, Census Bureau, 1997 Economic Census 1997 Commodity Flow Survey,Hazardous Materials (Washington, DC: December 1999), table 1.