Table 1-57: U.S. Hazardous Materials Shipments by Hazard Class, 1997

Table 1-57: U.S. Hazardous Materials Shipments by Hazard Class, 1997

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Hazard class and description Value ($ billion) Percent Tons (millions) Percent Ton-miles (billions) Percent Average miles per shipment
Class 1. Explosives 4.3 0.9% 1.5 0.1% S S 549
Class 2. Gases 40.9 8.8% 115.0 7.3% 21.8 8.3% 66
Class 3. Flammable liquids 335.6 72.0% 1,264.3 80.8% 160.0 60.7% 73
Class 4. Flammable solids 3.9 0.8% 11.8 0.8% 9.6 3.6% 838
Class 5. Oxidizers and organic peroxides 4.5 1.0% 9.2 0.6% 4.5 1.7% 193
Class 6. Toxics (poison) 10.1 2.2% 6.4 0.4% 2.8 1.1% 402
Class 7. Radioactive materials 2.7 0.6% 0.9 0.1% RZ RZ 445
Class 8. Corrosive materials 40.4 8.7% 91.6 5.9% 41.2 15.6% 201
Class 9. Miscellaneous dangerous goods 23.9 5.1% 65.3 4.2% 22.7 8.6% 323
Total 466.4 100.0% 1,565.2 100.0% 263.8 100.0% 113

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

NOTE

Numbers may not add to totals due to roundings.

SOURCE

U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, Census Bureau, 1997 Economic Census, Transportation, 1997 Commodity Flow Survey, Hazardous Materials (Washington, DC: December 1999), table 2.