Table 2c. Hazardous Material Shipment Characteristics by Hazard Class: Percent of Total for 2007 and 2002
Table 2c. Hazardous Material Shipment Characteristics by Hazard Class: Percent of Total for 2007 and 2002
Estimates are based on data from the 2007 and 2002 Commodity Flow Surveys. Because of rounding, estimates may not be additive.
| Hazard class and description | Value (percent) | Tons (percent) | Ton-miles (percent) 1 | Value Standard Error of % | Tons Standard Error of % | Ton-miles Standard Error of % | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2007 | 2002 | 2007 | 2002 | 2007 | 2002 | 2007 | 2002 | 2007 | 2002 | 2007 | 2002 | |
| Total | 100 | 100 | 100 | 100 | 100 | 100 | - | - | - | - | - | - |
| Class 1, Explosives | 0.8 | 1.2 | 0.1 | 0.2 | 0.3 | 0.5 | 0.2 | 0.3 | - | - | - | 0.1 |
| Class 2, Gases | 9.1 | 11.2 | 11.2 | 9.7 | 17.1 | 11.4 | 0.8 | 0.8 | 0.9 | 1.1 | 1.8 | 0.9 |
| Class 3, Flammable liquids | 80.8 | 74.3 | 78.6 | 81.6 | 56.1 | 66.9 | 1.2 | 1.4 | 1.1 | 1.4 | 2 | 1.6 |
| Class 4, Flammable solids | 0.3 | 1.0 | 0.9 | 0.5 | 1.7 | 1.3 | 0.1 | 0.2 | 0.2 | - | 0.3 | 0.2 |
| Class 5, Oxidizers and organic peroxides | 0.5 | 0.8 | 0.7 | 0.6 | 2.2 | 1.3 | - | 0.2 | 0.1 | 0.2 | 0.4 | 0.3 |
| Class 6, Toxic (poison) | 1.5 | 1.3 | 0.5 | 0.4 | 1.8 | 1.3 | 0.4 | 0.2 | 0.1 | - | 0.4 | 0.3 |
| Class 7, Radioactive materials | 1.4 | 0.9 | - | - | - | - | 0.3 | 0.3 | - | - | - | - |
| Class 8, Corrosive materials | 3.6 | 5.8 | 5.1 | 4.1 | 13.7 | 11.1 | 0.2 | 0.5 | 0.4 | 0.6 | 1.7 | 1.1 |
| Class 9, Miscellaneous dangerous goods | 2.1 | 3.6 | 2.8 | 2.8 | 7.1 | 6.2 | 0.2 | 0.5 | 0.2 | 0.6 | 0.8 | 0.7 |
KEY: - = Zero or Less than half the unit shown; thus, it has been rounded to zero.
1 Ton-miles estimates are based on estimated distances traveled along a modeled transportation network.
NOTES: Value-of-shipment estimates are reported in current prices. More information on sampling error, confidentiality protection, nonsampling error, sample design, and definitions may be found at http://www.bts.gov/publications/commodity_flow_survey/.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2007 Economic Census: Transportation Commodity Flow Survey, December 2009.