Table 1-56: U.S. Hazardous Materials Shipments by Transportation Mode, 1997

Table 1-56: U.S. Hazardous Materials Shipments by Transportation Mode, 1997

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Transportation mode Value Tons Ton-miles
($ billion) Percent (millions) Percent (billions) Percent
TOTAL all modes 466.4 100.0 1,565.2 100.0 263.8 100.0
Single modes, total 452.7 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 modes, total 5.7 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 modes, total 7.9 1.7 17.5 1.1 1.8 0.7

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

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 may not add to totals due to roundings.

SOURCE

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