HAZMAT Table 4 ,,,,,,,,,,
"Hazardous Versus Nonhazardous Material Shipment Characteristics by Mode of Transportation: 2002
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"[Estimates are based on data from the 2002 Commodity Flow Survey. Because of rounding, estimates may not be additive]
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Mode of transportation,Tons ,,,,,Ton-miles,,,,
,Total (thousands),Hazardous,,Nonhazardous,,Total (millions),Hazardous,,Nonhazardous,
,,2002 (thousands),Percent,2002 (thousands),Percent,,2002 (millions),Percent,2002 (millions),Percent
All modes,"11,667,919","2,191,519",18.8,"9,476,400",81.2,"3,137,898","326,727",10.4,"2,811,171",89.6
Single modes,"11,086,660","2,158,533",19.5,"8,928,127",80.5,"2,867,938","311,897",10.9,"2,556,041",89.1
Truck (1),"7,842,836","1,159,514",14.8,"6,683,322",85.2,"1,255,908","110,163",8.8,"1,145,745",91.2
For-hire truck ,"3,657,333","449,503",12.3,"3,207,830",87.7,"959,610","65,112",6.8,"894,498",93.2
Private truck,"4,149,658","702,186",16.9,"3,447,472",83.1,"291,114","44,087",15.1,"247,027",84.9
Rail,"1,873,884","109,369",5.8,"1,764,516",94.2,"1,261,612","72,087",5.7,"1,189,525",94.3
Water,"681,227","228,197",33.5,"453,030",66.5,"282,659","70,649",25.0,"212,011",75.0
Air (includes truck and air),"3,760",64,1.7,"3,696",98.3,"5,835",85,1.5,"5,751",98.5
Pipeline (2),"684,953","661,390",96.6,"23,563",3.4,S,S,S,S,S
Multiple modes,"216,686","18,745",8.7,"197,941",91.3,"225,715","12,488",5.5,"213,228",94.5
"Parcel, U.S.P.S. or courier","25,513",245,1.0,"25,268",99.0,"19,004",119,0.6,"18,885",99.4
Other multiple modes,"191,173","18,500",9.7,"172,673",90.3,"206,712","12,369",6.0,"194,343",94.0
Other and unknown modes,"364,573","14,241",3.9,"350,332",96.1,"44,245","2,342",5.3,"41,903",94.7
"
KEY: 
— Represents and estimate equal to zero or less than 1 unit of measure.  
S Estimate does not meet publication standards because of highly sampling variability or poor response quality.                                                                                                                                         
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(1) ""Truck"" as a single mode includes shipments that were made by only private truck, only for-hire truck, or a combination of private and for-hire truck. 
(2) Estimates for pipeline exclude shipments of crude petroleum.      
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SOURCE: 
Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.        
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