Table 1-57: U.S. Hazardous Materials Shipments by Hazard Class, 1997
Wednesday, November 21, 2012
Table 1-57: U.S. Hazardous Materials Shipments by Hazard Class, 1997
| 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.