Table 2c. Hazardous Material Shipment Characteristics by Hazard Class: Percent of Total for 2002 and 1997

Table 2c. Hazardous Material Shipment Characteristics by Hazard Class: Percent of Total for 2002 and 1997

[Estimates are based on data from the 2002 and 1997 Commodity Flow Surveys. Because of rounding, estimates may not be additive]

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Hazard class and description Value (percent) Tons (percent) Ton-miles (percent)
2002 1997 2002 1997 2002 1997
Total 100.0 100.0 100.0 100.0 100.0 100.0
Class 1, Explosives 1.2 1.1 0.2 0.1 0.5 S
Class 2, Gases 11.2 9.0 9.7 7.7 11.4 8.8
Class 3, Flammable liquids 74.3 73.5 81.6 81.3 66.9 62.7
Class 4, Flammable solids 1.0 0.8 0.5 0.8 1.3 3.3
Class 5, Oxidizers and organic peroxides 0.8 0.9 0.6 0.5 1.3 1.5
Class 6, Toxic (poison) 1.3 1.9 0.4 0.4 1.3 1.0
Class 7, Radioactive materials 0.9 0.5
Class 8, Corrosive materials 5.8 7.8 4.1 5.5 11.1 14.6
Class 9, Miscellaneous dangerous goods 3.6 4.5 2.8 3.7 6.2 7.7

KEY:
– Represents and estimate equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards b ecause of highly sampling variability or poor response quality.

SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.