HAZMAT Table B–7a ,,,,,,,
"Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: 2002
",,,,,,,
"[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]
",,,,,,,
Hazard Class Division and Mode of Transportation,Value,,Tons,,Ton–miles,,"CV of Average miles 
per shipment"
,CV,Std. error of percent,CV,Std. error of percent,CV,Std. error of percent,
"Division 1.1, Explosives with a mass explosion hazard",,,,,,,
All modes,33.9,—,S,S,S,S,S
Single modes,33.5,1.0,S,S,S,S,S
Truck,33.5,1.0,S,S,S,S,S
For-hire truck ,44.3,13.4,S,S,S,S,27.1
Private truck,S,S,S,S,S,S,39.1
Rail,—,—,—,—,—,—,—
Water,—,—,—,—,—,—,—
Air (includes truck and air),—,—,—,—,—,—,—
Pipeline,—,—,—,—,S,S,S
Multiple modes,S,S,S,S,S,S,31.6
"Parcel, U.S.P.S. or courier",S,S,S,S,S,S,31.6
Other multiple modes,—,—,—,—,—,—,—
Other and unknown modes,S,S,S,S,S,S,31.6
"Division 1.2, Explosives with a projection hazard",,,,,,,
All modes,S,S,S,S,S,S,31.6
Single modes,S,S,S,S,S,S,31.6
Truck,S,S,S,S,S,S,31.6
For-hire truck ,S,S,S,S,S,S,31.6
Private truck,—,—,—,—,—,—,—
Rail,—,—,—,—,—,—,—
Water,—,—,—,—,—,—,—
Air (includes truck and air),—,—,—,—,—,—,—
Pipeline,—,—,—,—,S,S,S
Multiple modes,—,—,—,—,—,—,—
"Parcel, U.S.P.S. or courier",—,—,—,—,—,—,—
Other multiple modes,—,—,—,—,—,—,—
Other and unknown modes,—,—,—,—,—,—,—
"Division 1.3, Explosives with predominantly a fire hazard",,,,,,,
All modes,S,S,46.8,—,43.3,—,23.3
Single modes,S,S,46.8,—,43.3,—,23.3
Truck,S,S,S,S,47.9,5.2,23.5
For-hire truck ,S,S,S,S,S,S,26.3
Private truck,S,S,S,S,S,S,40.0
Rail,S,S,S,S,S,S,31.6
Water,—,—,—,—,—,—,—
Air (includes truck and air),S,S,S,S,S,S,31.6
Pipeline,—,—,—,—,S,S,S
Multiple modes,—,—,—,—,—,—,—
"Parcel, U.S.P.S. or courier",—,—,—,—,—,—,—
Other multiple modes,—,—,—,—,—,—,—
Other and unknown modes,—,—,—,—,—,—,—
"Division 1.4, Explosives with no significant blast hazard",,,,,,,
All modes,27.0,—,34.4,—,26.7,—,8.4
Single modes,28.1,3.5,35.0,1.8,27.4,1.9,12.1
Truck,27.8,3.3,35.1,1.9,27.5,2.3,11.8
For-hire truck ,25.2,3.9,36.6,2.7,27.9,2.7,8.4
Private truck,S,S,41.7,1.9,S,S,32.9
Rail,S,S,S,S,S,S,31.6
Water,—,—,—,—,—,—,—
Air (includes truck and air),S,S,49.7,0.3,S,S,16.3
Pipeline,—,—,—,—,S,S,S
Multiple modes,38.3,3.5,S,S,S,S,10.8
"Parcel, U.S.P.S. or courier",38.3,3.5,S,S,S,S,10.8
Other multiple modes,—,—,—,—,—,—,—
Other and unknown modes,S,S,S,S,S,S,S
"Division 1.5, Very insensitive explosives, blasting agent",,,,,,,
All modes,35.9,—,47.9,—,38.1,—,S
Single modes,35.9,0.2,47.9,—,38.1,—,S
Truck,36.5,3.6,49.3,3.9,38.1,7.0,32.6
For-hire truck ,48.5,5.5,45.7,9.2,46.2,9.3,15.4
Private truck,39.2,7.8,S,S,45.7,9.2,49.0
Rail,44.9,2.7,41.6,3.9,44.6,7.7,24.2
Water,—,—,—,—,—,—,—
Air (includes truck and air),S,S,S,S,S,S,28.0
Pipeline,—,—,—,—,S,S,S
Multiple modes,S,S,S,S,S,S,28.2
"Parcel, U.S.P.S. or courier",S,S,S,S,S,S,28.2
Other multiple modes,—,—,—,—,—,—,—
Other and unknown modes,S,S,S,S,S,S,34.9
"Division 2.1, Flammable gases",,,,,,,
All modes,10.6,—,10.5,—,14.1,—,33.4
Single modes,10.7,0.4,10.5,0.2,13.9,0.5,33.8
Truck,11.5,5.3,19.7,6.3,35.4,4.5,36.9
For-hire truck ,24.9,3.1,29.7,3.4,49.5,4.6,20.3
Private truck,14.5,5.1,28.1,6.1,39.1,2.1,22.4
Rail,20.5,2.8,19.1,3.0,15.9,4.3,7.5
Water,43.1,1.1,37.8,2.3,32.7,2.2,32.4
Air (includes truck and air),S,S,S,S,S,S,27.6
Pipeline,23.4,4.5,21.6,5.1,S,S,S
Multiple modes,33.8,0.2,44.4,0.2,49.3,0.5,17.5
"Parcel, U.S.P.S. or courier",S,S,S,S,S,S,25.1
Other multiple modes,38.7,—,44.7,0.2,49.8,0.5,S
Other and unknown modes,S,S,32.7,—,38.7,—,S
"Division 2.2, Nonflammable, nontoxic compressed gases",,,,,,,
All modes,11.8,—,36.7,—,29.6,—,38.9
Single modes,12.1,1.2,36.8,0.3,30.1,2.2,34.9
Truck,12.7,2.0,27.2,9.9,29.1,7.9,35.3
For-hire truck ,24.3,8.2,43.9,6.8,31.3,9.8,13.2
Private truck,23.0,7.8,31.7,9.4,42.7,9.7,37.7
Rail,41.8,0.3,45.3,0.6,S,S,19.2
Water,S,S,S,S,S,S,31.7
Air (includes truck and air),41.5,0.2,S,S,S,S,19.2
Pipeline,S,S,S,S,S,S,S
Multiple modes,29.4,1.2,40.2,0.1,S,S,32.1
"Parcel, U.S.P.S. or courier",35.7,1.2,S,S,28.3,—,35.1
Other multiple modes,43.7,0.1,S,S,S,S,27.5
Other and unknown modes,37.0,0.2,29.5,0.1,S,S,S
"Division 2.3, Gases toxic by inhalation",,,,,,,
All modes,11.8,—,13.9,—,11.3,—,27.3
Single modes,11.8,0.4,13.9,0.7,11.2,0.2,27.4
Truck,18.0,7.4,22.6,6.2,26.3,6.1,32.1
For-hire truck ,29.8,7.3,35.3,5.7,35.7,5.8,30.3
Private truck,23.2,7.0,26.4,4.5,S,S,31.0
Rail,17.9,4.9,11.5,5.9,12.7,7.9,9.7
Water,S,S,S,S,S,S,31.8
Air (includes truck and air),S,S,S,S,S,S,25.8
Pipeline,43.5,5.5,40.4,6.1,S,S,S
Multiple modes,S,S,S,S,S,S,41.9
"Parcel, U.S.P.S. or courier",S,S,S,S,41.1,—,41.7
Other multiple modes,S,S,S,S,S,S,31.6
Other and unknown modes,44.1,0.5,S,S,46.5,0.2,S
"Division 4.1, Flammable solids",,,,,,,
All modes,30.0,—,9.7,—,16.8,—,43.3
Single modes,32.6,6.2,9.7,0.2,16.9,0.5,S
Truck,38.9,9.4,7.1,6.4,24.7,5.9,S
For-hire truck ,21.6,6.3,12.3,6.7,32.9,4.2,28.1
Private truck,46.1,10.6,21.7,4.4,18.7,2.8,S
Rail,S,S,26.5,5.0,20.4,7.5,14.8
Water,44.1,0.7,49.9,5.4,S,S,30.1
Air (includes truck and air),S,S,S,S,S,S,25.4
Pipeline,S,S,S,S,S,S,S
Multiple modes,S,S,S,S,S,S,44.0
"Parcel, U.S.P.S. or courier",39.7,2.2,46.8,—,48.5,—,20.7
Other multiple modes,S,S,S,S,S,S,31.1
Other and unknown modes,S,S,S,S,S,S,S
"Division 4.2, Spontaneously combustible materials",,,,,,,
All modes,36.3,—,35.4,—,39.4,—,19.4
Single modes,37.7,1.5,35.6,1.1,39.8,2.8,23.9
Truck,39.6,3.9,43.3,9.7,S,S,24.4
For-hire truck ,S,S,45.6,10.8,S,S,19.0
Private truck,20.9,9.9,27.2,9.0,S,S,21.1
Rail,36.9,2.9,S,S,43.1,13.1,25.8
Water,—,—,—,—,—,—,—
Air (includes truck and air),S,S,S,S,S,S,28.7
Pipeline,—,—,—,—,S,S,S
Multiple modes,46.0,1.5,33.3,1.1,S,S,23.8
"Parcel, U.S.P.S. or courier",46.2,1.5,33.8,1.1,S,S,23.8
Other multiple modes,S,S,S,S,S,S,30.1
Other and unknown modes,S,S,S,S,S,S,S
"Division 4.3, Dangerous when wet materials",,,,,,,
All modes,S,S,42.8,—,S,S,17.6
Single modes,S,S,45.2,5.8,S,S,21.5
Truck,S,S,48.0,7.0,S,S,22.6
For-hire truck ,S,S,S,S,S,S,21.5
Private truck,41.1,9.1,36.4,10.8,S,S,37.0
Rail,S,S,S,S,S,S,29.8
Water,—,—,—,—,—,—,—
Air (includes truck and air),S,S,S,S,S,S,28.0
Pipeline,—,—,—,—,S,S,S
Multiple modes,46.0,3.3,S,S,S,S,29.9
"Parcel, U.S.P.S. or courier",S,S,S,S,S,S,25.6
Other multiple modes,S,S,S,S,S,S,27.3
Other and unknown modes,S,S,S,S,S,S,S
"Division 5.1, Oxidizers",,,,,,,
All modes,21.2,—,29.1,—,29.4,—,21.0
Single modes,21.8,2.0,29.1,1.7,30.0,2.4,17.3
Truck,25.3,5.2,37.0,6.6,47.2,8.5,19.3
For-hire truck ,24.6,7.5,44.2,8.4,S,S,15.6
Private truck,40.5,7.7,32.2,6.2,21.5,2.7,19.4
Rail,41.0,5.2,24.2,6.5,22.1,8.8,16.8
Water,—,—,—,—,—,—,—
Air (includes truck and air),S,S,49.7,—,S,S,31.3
Pipeline,—,—,—,—,S,S,S
Multiple modes,41.5,1.8,S,S,S,S,18.0
"Parcel, U.S.P.S. or courier",S,S,S,S,S,S,25.1
Other multiple modes,49.3,1.9,S,S,S,S,S
Other and unknown modes,S,S,S,S,S,S,S
"Division 5.2, Organic peroxides",,,,,,,
All modes,49.4,—,S,S,S,S,16.4
Single modes,49.7,1.2,S,S,S,S,17.6
Truck,S,S,S,S,S,S,17.7,,,,,
For-hire truck ,S,S,S,S,S,S,16.0,,,,,
Private truck,S,S,44.1,14.5,49.5,11.8,31.7,,,,,
Rail,S,S,S,S,S,S,30.1,,,,,
Water,—,—,—,—,—,—,—,,,,,
Air (includes truck and air),S,S,S,S,S,S,31.6,,,,,
Pipeline,—,—,—,—,S,S,S,,,,,
Multiple modes,S,S,S,S,S,S,29.5,,,,,
"Parcel, U.S.P.S. or courier",S,S,S,S,S,S,29.5,,,,,
Other multiple modes,—,—,—,—,—,—,—,,,,,
Other and unknown modes,S,S,S,S,S,S,31.6,,,,,
"
KEY: 
– Represents an 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. 
CV Coefficient of variation of number",,,,,,,,,,,,
"
NOTE: The introduction and appendixes give information on confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs.",,,,,,,,,,,,
"SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.",,,,,,,,,,,,