2002 Economic Census: Transportation. 2002 commodity flow survey. United States, 2002. Hazardous materials
U.S. Department of Transportation, Bureau of Transportation Statistics, 2005 - Hazardous substances
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1a Hazardous Material Shipment Characteristics by Mode
Hazardous Material Shipment Characteristics by Selected
TransportationCommodity Flow Survey United States iii
1997 Commodity Flow 2002 Commodity Flow 2002 Estimates 2002 thousands Air includes truck appendixes give information based on data Coefficient of variation Commodity Flow Survey confidentiality protection division and mode equal to zero error of percentage estimate equal Estimates are based Estimates are shown Flow Survey United found at www.census.gov/cfs Hazard class division Hazardous Material Shipment high sampling variability information on confidentiality Intrastate percent Introduction and appendixes Material Shipment Characteristics meet publication standards miles per shipment mode of transportation Multiple modes NAICS nonsampling error number Coefficient number Standard error ORGANIC PEROXIDES Packing Group Parcel percent change Coefficient percentage Standard error Pipeline2 poor response quality Represents an estimate sample design sampling error SCTG codes Service or courier shown as percents Total for 2002 Transportation—Commodity Flow Survey truck and air U.S. Postal Service unit of measure United States Transportation—Commodity unknown modes Value Tons Ton-miles variability or poor variation of number zero or less