Table 2b. Hazardous Material Shipment Characteristics by Hazard Class: 2007 and 2002
Table 2b. Hazardous Material Shipment Characteristics by Hazard Class: 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 | Tons | Ton-miles 1 | Average miles per shipment | Value | Tons | Ton-miles | Average miles per shipment | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2007 (million $) |
2002 (million $) |
Percent change |
2007 (thousands) | 2002 (thousands) |
Percent change |
2007 (millions) | 2002 (millions) |
Percent change |
2007 | 2002 | Percent change |
2007 CV 2 | 2002 CV | Standard Error of % change | 2007 CV | 2002 CV | Standard Error of % change | 2007 CV | 2002 CV | Standard Error of % change | 2007 CV | 2002 CV | Standard Error of % change | |
| Total | 1,448,218 | 660,181 | 119.4 | 2,231,133 | 2,191,519 | 1.8 | 323,457 | 326,727 | -1.0 | 96 | 136 | -29.7 | 2.6 | 3 | 8.7 | 3.3 | 4.2 | 5.5 | 4.6 | 4.4 | 6.3 | 8.1 | 7.1 | 7.6 |
| Class 1, Explosives | 11,754 | 7,901 | 48.8 | 3,047 | 5,000 | -39.1 | 911 | 1,568 | -41.9 | 738 | 651 | 13.4 | 17.6 | 23.8 | 43.9 | 14.1 | 43.2 | 27.7 | 13 | 29.5 | 18.7 | 8.7 | 10.9 | 15.8 |
| Class 2, Gases | 131,810 | 73,932 | 78.3 | 250,506 | 213,358 | 17.4 | 55,260 | 37,262 | 48.3 | 51 | 95 | -46.6 | 9.2 | 7.9 | 21.9 | 8.5 | 15.6 | 20.8 | 12.8 | 8.9 | 23.5 | 10.7 | 29 | 16.5 |
| Class 3, Flammable liquids | 1,170,455 | 490,238 | 138.8 | 1,752,814 | 1,788,986 | -2.0 | 181,615 | 218,574 | -16.9 | 91 | 106 | -14.3 | 3.3 | 3.7 | 11.8 | 3.3 | 4.3 | 5.3 | 2.7 | 5.2 | 4.9 | 18.6 | 12.2 | 19 |
| Class 4, Flammable solids | 4,067 | 6,566 | -38.1 | 20,408 | 11,300 | 80.6 | 5,547 | 4,391 | 26.3 | 309 | 158 | 95.4 | 22.2 | 22.1 | 19.7 | 20.9 | 8.8 | 41.8 | 21.1 | 14 | 32.6 | 18.1 | 46.3 | 97.1 |
| Class 5, Oxidizers and organic peroxides | 6,695 | 5,471 | 22.4 | 14,959 | 12,670 | 18.1 | 7,024 | 4,221 | 66.4 | 361 | 407 | -11.3 | 10.6 | 21.8 | 29.6 | 15 | 26.8 | 36 | 18.9 | 25.3 | 52.2 | 9.8 | 18.7 | 18.7 |
| Class 6, Toxic (poison) | 21,198 | 8,275 | 156.2 | 11,270 | 8,459 | 33.2 | 5,667 | 4,254 | 33.2 | 467 | 626 | -25.5 | 22 | 11.6 | 64.6 | 13.9 | 15.9 | 28.3 | 15.7 | 22.2 | 36 | 14.7 | 21.3 | 19.3 |
| Class 7, Radioactive materials | 20,633 | 5,850 | 252.7 | 515 | 57 | 804.4 | 37 | 44 | -16.0 | S | S | S | 25.7 | 39 | 164.7 | 35.8 | 31.2 | 428.8 | 24 | 31.7 | 33.3 | S | S | S |
| Class 8, Corrosive materials | 51,475 | 38,324 | 34.3 | 114,441 | 90,671 | 26.2 | 44,395 | 36,260 | 22.4 | 208 | 301 | -30.9 | 5.9 | 6.9 | 12.2 | 9.4 | 9.7 | 17.1 | 16.1 | 10.1 | 23.3 | 14.3 | 14.9 | 14.3 |
| Class 9, Miscellaneous dangerous goods | 30,131 | 23,625 | 27.5 | 63,173 | 61,018 | 3.5 | 23,002 | 20,153 | 14.1 | 484 | 368 | 31.6 | 10.5 | 13.4 | 21.9 | 9.7 | 20.6 | 23.6 | 12.5 | 11.8 | 19.8 | 16.3 | 9.3 | 24.7 |
KEY: S = Estimate does not meet publication standards because of high sampling variability or poor response quality.
1 Ton-miles estimates are based on
estimated distances traveled along a modeled transportation network.
2 Coefficient of Variation.
NOTES: Value-of-shipment estimates are reported in current prices. Estimated measures of sampling variability for each estimate known as coefficients of variation (CV) are also provided in these tables. 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.