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Table 2b. Hazardous Material Shipment Characteristics by Hazard Class: 2007 and 2002

Tuesday, July 3, 2012

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.

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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.