Table 6c. Hazardous Material Shipment Characteristics by Hazard Class and Mode of Transportation: Percent of Total for 2007 and 2002

Table 6c. Hazardous Material Shipment Characteristics by Hazard Class and Mode of Transportation: Percent of Total for 2007 and 2002

Estimates are based on data from the 2007 and 2002 Commodity Flow Surveys. Because of rounding, estimates may not be additive.

Class 1, Explosives

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Hazard Class and Mode of Transportation Value Tons Ton-miles 1 Value Tons Ton-miles
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of %
All modes 100 100 100 100 100 100 - - - - - -
Single modes 92.5 98.1 99.1 99.7 95.4 99.3 2.6 1.8 0.2 0.2 1.4 0.4
Truck 2 91.2 95.8 98.9 92.6 94.2 77.0 2.7 2.5 0.2 3.2 1.5 5.5
For-hire truck 63.6 78.1 26.5 31.0 68.8 53.3 6.2 4.4 4.2 12 4 9.6
Private truck 27.6 17.7 72.4 S 25.4 23.7 5.6 3.9 4.3 S 3.5 5.6
Rail S 1.2 S 7.0 S 22.1 S 1.8 S 3.1 S 5.6
Water S - S - S - S - S - S -
Deep draft S - S - S - S - S - S -
Air (includes truck and air) 1.1 S S - S 0.1 0.6 S S - S 0.6
Multiple modes 7.3 1.7 0.8 S 4.6 S 2.6 1.8 0.2 S 1.4 S
Parcel, U.S.P.S. or courier 6.1 1.7 0.5 S 1.6 S 1.2 1.8 0.1 S 0.3 S
Truck and water S - S - S - S - S - S -
Other and unknown modes 0.3 S - S - S 0.1 S - S - S

Class 2, Gases

Hazard Class and Mode of Transportation Value Tons Ton-miles 1 Value Tons Ton-miles
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of %
All modes 100 100 100 100 100 100 - - - - - -
Single modes 96.5 98.4 98.3 99.4 95.9 98.9 0.8 0.5 0.5 0.1 0.9 0.3
Truck 2 47.7 63.6 54.3 45.4 37.5 36.3 3.4 4.4 4.8 5.9 6 4.5
For-hire truck 12.1 29.6 9.9 13.8 20.0 18.2 1.5 3.6 1.6 2.9 4.7 3.7
Private truck 35.6 34.0 44.4 31.5 17.4 17.6 3.6 4 5.4 5.7 4.3 5.1
Rail 15.7 12.1 13.0 13.7 40.7 44.6 4.2 1.8 2.1 2.4 4.1 4.7
Water 1.0 2.3 1.0 3.3 1.5 4.7 0.4 0.6 0.3 1.6 0.6 1.5
Shallow draft 0.4 - 0.4 - 1.2 - 0.3 - 0.3 - 1 -
Deep draft 0.6 - 0.6 - S - 0.5 - 0.5 - S -
Air (includes truck and air) 0.2 0.3 S S - S 0.2 0.1 S S - S
Pipeline 3 31.9 20.0 30.0 37.0 S S 4.3 3.6 5.4 5.8 S S
Multiple modes 2.9 0.9 1.3 0.3 4.0 0.9 0.7 0.4 0.4 0.1 0.9 0.3
Parcel, U.S.P.S. or courier 1.2 0.7 - S - - 0.5 0.4 - S - -
Truck and rail 1.1 - 0.9 - 3.5 - 0.5 - 0.3 - 0.9 -
Truck and water S - S - S - S - S - S -
Rail and water 0.4 - 0.3 - 0.2 - 0.7 - 0.6 - 0.4 -
Other multiple modes S 0.2 S 0.3 S 0.9 S - S 0.1 S 0.3
Other and unknown modes 0.7 0.7 0.4 0.3 0.1 0.2 0.2 0.2 0.2 - - -

Class 3, Flammable Liquids

Hazard Class and Mode of Transportation Value Tons Ton-miles 1 Value Tons Ton-miles
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of %
All modes 100 100 100 100 100 100 - - - - - -
Single modes 94.6 97.9 94.2 98.4 80.4 94.6 0.7 0.2 0.8 0.2 3.1 1.3
Truck 2 57.4 60.5 53.9 53.0 30.8 31.0 1.7 1.4 1.9 1.1 2.3 2.8
For-hire truck 24.4 24.4 22.8 19.4 16.8 16.3 1.7 1.4 1.8 0.8 1.7 3
Private truck 33.0 35.5 31.1 33.2 14.0 14.4 1 1.6 1.1 1.3 1.3 1.1
Rail 2.1 2.6 1.8 2.0 12.6 11.3 0.3 0.2 0.3 0.1 2.1 1.8
Water 5.4 8.4 7.4 11.1 16.9 27.7 0.8 1.2 0.9 1.7 3.1 2.9
Shallow draft 4.4 - 6.2 - 9.3 - 0.8 - 0.9 - 3 -
Great Lakes S - S - S - S - S - S -
Deep draft 0.9 - 1.1 - 7.1 - 0.1 - 0.2 - 1.7 -
Air (includes truck and air) S - S S S S S - S S S S
Pipeline 3 29.8 26.4 31.1 32.2 S S 1.6 1.4 1.8 1.6 S S
Multiple modes 5.0 1.1 5.4 0.9 19.2 4.5 0.6 0.3 0.7 0.2 3.1 1.3
Parcel, U.S.P.S. or courier 0.2 0.4 - - - - 0.1 0.1 - - - -
Truck and rail 0.3 - 0.2 - 2.3 - 0.1 - 0.1 - 0.7 -
Truck and water 2.0 - 2.1 - 6.7 - 0.4 - 0.4 - 1.3 -
Rail and water 0.3 - 0.2 - 1.2 - 0.1 - 0.1 - 0.3 -
Other multiple modes 2.2 0.8 2.9 0.9 9.0 4.5 0.5 0.2 0.6 0.2 2.3 1.3
Other and unknown modes 0.4 0.9 0.3 0.7 0.4 S - 0.2 - 0.1 0.1 S

Class 4, Flammable Solids

Hazard Class and Mode of Transportation Value Tons Ton-miles 1 Value Tons Ton-miles
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of %
All modes 100 100 100 100 100 100 - - - - - -
Single modes 82.2 90.8 95.6 99.2 96.0 98.7 4.5 5.4 2.5 0.3 3 0.8
Truck 2 59.6 78.4 52.7 59.4 23.5 31.6 6.8 7.6 7.1 5.7 8.9 6.4
For-hire truck 44.3 37.3 34.7 40.9 15.1 27.2 6.6 7.8 8.8 6.3 8.4 6.9
Private truck 15.3 41.0 18.0 18.4 S 4.4 5.2 7.1 3 4 S 1.8
Rail S 9.5 19.6 27.9 61.9 56.2 S 4.3 5.3 3.7 11 6.2
Water S 0.3 S 11.2 S S S 0.4 S 5.1 S S
Shallow draft S - S - S - S - S - S -
Deep draft S - S - S - S - S - S -
Air (includes truck and air) 0.6 S - S S S 0.4 S - S S S
Pipeline 3 0.2 S S S S S 0.3 S S S S S
Multiple modes S S S S 3.6 S S S S S 2.3 S
Parcel, U.S.P.S. or courier S 2.3 S - S S S 1.3 S - S S
Truck and rail 3.7 - 0.3 - S - 6.1 - 1.2 - S -
Truck and water S - S - S - S - S - S -
Other multiple modes S S S S S S S S S S S S
Other and unknown modes 0.2 S S S S S 0.5 S S S S S

Class 5, Oxidizers and organic peroxides

Hazard Class and Mode of Transportation Value Tons Ton-miles 1 Value Tons Ton-miles
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of %
All modes 100 100 100 100 100 100 - - - - - -
Single modes 93.4 97.5 92.7 97.1 89.3 95.0 2.8 1.4 3.4 1.3 6 1.9
Truck 2 65.9 83.8 52.4 77.9 31.3 64.2 4.3 4.6 5.6 6.7 6.6 8.6
For-hire truck 39.1 43.5 30.2 53.5 24.7 57.1 3.1 6.4 2.8 7.7 5 9.5
Private truck 26.9 40.2 22.2 24.0 6.7 6.6 3.5 5.4 5.2 5.1 3.3 2.1
Rail 25.9 13.6 39.6 19.2 57.9 30.8 3.8 4.9 5.5 6.7 7.4 9.1
Water S - S - S - S - S - S -
Deep draft S - S - S - S - S - S -
Air (includes truck and air) 1.0 S - - S S 0.6 S - - S S
Pipeline 3 S - S - S S S - S - S S
Multiple modes 5.7 1.5 6.4 S 9.7 S 2.7 1.2 3.3 S 5.9 S
Parcel, U.S.P.S. or courier 0.9 S - S - S 0.5 S - S - S
Truck and rail 4.3 - 6.3 - 8.9 - 2.5 - 3.6 - 6.7 -
Truck and water S - S - S - S - S - S -
Other and unknown modes S S S S S S S S S S S S

Class 6, Toxic (poison)

Hazard Class and Mode of Transportation Value Tons Ton-miles 1 Value Tons Ton-miles
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of %
All modes 100 100 100 100 100 100 - - - - - -
Single modes 94.8 93.1 92.7 97.4 98.0 97.0 1.2 2.8 2.2 2.7 1 1.9
Truck 2 47.8 59.0 26.2 26.7 15.0 19.9 5.5 2.9 4.6 5.2 3.7 6.1
For-hire truck 41.0 44.7 21.4 20.8 13.7 18.2 5 3.7 4.1 3.6 3.2 5.2
Private truck 6.8 14.3 4.8 5.8 1.3 1.7 3.6 3.5 1.3 2.5 0.7 1
Rail 32.0 13.8 47.5 22.6 80.8 40.3 5.5 2.4 9.3 5.6 5.3 6
Water S 11.6 16.4 27.5 S S S 4 13.5 8.5 S S
Shallow draft S - S - S - S - S - S -
Deep draft S - S - 0.4 - S - S - 1.6 -
Air (includes truck and air) 0.2 S - S S S 0.1 S - S S S
Pipeline 3 S S 2.6 20.7 S S S S 1.7 6.5 S S
Multiple modes 5.0 S 7.2 S 2.0 S 1.2 S 2.2 S 1 S
Parcel, U.S.P.S. or courier S 1.2 S S - S S 1.2 S S - S
Truck and rail 0.2 - 0.3 - 0.3 - 0.5 - 0.4 - 0.3 -
Truck and water - - - - - - 0.2 - 0.1 - - -
Rail and water 0.1 - 0.1 - 0.1 - 0.4 - 0.4 - 0.2 -
Other multiple modes S S 6.8 S 1.5 S S S 2.9 S 1.7 S
Other and unknown modes 0.1 S S S - 0.9 0.1 S S S - 1

Class 7, Radioactive materials

Hazard Class and Mode of Transportation Value Tons Ton-miles 1 Value Tons Ton-miles
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of %
All modes 100 100 100 100 100 100 - - - - - -
Single modes 93.6 92.5 97.6 92.3 82.3 87.7 5.2 5.3 1.6 2.4 5.7 5
Truck 2 92.5 91.7 97.1 91.0 73.0 84.5 6.6 8.5 2.2 2.1 6.9 6.8
For-hire truck 14.3 55.9 3.0 39.1 41.5 55.1 6.1 11.1 1.4 12.6 9.2 9
Private truck 78.2 35.8 94.1 51.9 31.5 S 8.5 8.7 3 11.7 8 S
Air (includes truck and air) 1.1 0.7 0.5 1.2 9.3 3.2 1.8 7.6 1 1.7 3.5 7
Multiple modes 5.9 7.5 1.8 7.3 17.5 12.1 5.2 5.3 1.6 2.5 5.7 5
Parcel, U.S.P.S. or courier 5.9 7.5 1.8 7.3 17.5 12.1 5.2 5.3 1.6 2.5 5.7 5
Other and unknown modes 0.5 S 0.6 S 0.2 S 0.3 S 0.5 S 0.3 S

Class 8, Corrosive materials

Hazard Class and Mode of Transportation Value Tons Ton-miles 1 Value Tons Ton-miles
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of %
All modes 100 100 100 100 100 100 - - - - - -
Single modes 92.6 96.5 91.9 98.0 90.8 96.0 1 0.8 1.7 0.5 2.2 1.1
Truck 2 71.1 83.0 49.9 56.7 33.3 43.6 2.6 1.4 4.3 1.8 4.3 3.9
For-hire truck 40.7 50.8 27.8 39.3 27.9 36.6 3.2 3.3 2.6 2.8 3.2 4.6
Private truck 30.5 31.8 22.1 17.3 5.4 6.9 2.4 3.1 2.8 1.3 1.2 1
Rail 15.5 10.3 30.4 26.4 49.7 43.0 1.6 1.1 5.8 2.5 6.2 4.4
Water 2.9 2.0 7.3 10.5 7.5 9.0 1.1 0.7 2.2 2 3.1 2.8
Shallow draft 2.2 - 5.1 - 7.2 - 1.2 - 2.1 - 3.5 -
Deep draft S - 2.2 - S - S - 10 - S -
Air (includes truck and air) 0.4 0.4 S S S S 0.2 0.1 S S S S
Pipeline 3 2.7 0.7 4.3 4.4 S S 1 0.2 1.5 1.4 S S
Multiple modes 6.2 2.3 6.8 1.2 7.8 3.3 0.9 0.4 1.7 0.3 2.4 1.1
Parcel, U.S.P.S. or courier 2.1 1.6 0.1 S 0.1 S 0.5 0.4 - S - S
Truck and rail 2.0 - 3.3 - 5.8 - 0.4 - 1 - 1.6 -
Truck and water 0.2 - S - S - 0.1 - S - S -
Rail and water 1.0 - 0.9 - S - 0.7 - 0.6 - S -
Other multiple modes 0.9 0.7 S 1.1 1.0 3.2 1 0.2 S 0.3 1.5 1.1
Other and unknown modes 1.2 S 1.2 0.8 S 0.7 0.4 S 0.5 0.3 S 0.2

Class 9, Miscellaneous dangerous goods

Hazard Class and Mode of Transportation Value Tons Ton-miles 1 Value Tons Ton-miles
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007
(percent)
2002
(percent)
2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of % 2007 Standard Error of % 2002 Standard Error of %
All modes 100 100 100 100 100 100 - - - - - -
Single modes 94.2 95.6 96.9 98.4 94.2 96.5 1.7 1.9 1.3 0.9 2.4 1.6
Truck 2 63.3 70.2 64.1 64.1 31.9 34.3 3.9 4.6 4.6 6.5 3.8 4.5
For-hire truck 44.4 46.4 37.8 37.6 23.6 21.3 3.2 5.3 4.3 4.8 3.5 2.5
Private truck 18.8 23.8 26.3 26.5 8.3 13.0 1.9 5.8 3.4 4.7 1.2 3.8
Rail 24.2 13.7 24.7 20.1 55.3 46.2 2.9 2.3 2.7 3.5 3.7 5.4
Water S 8.3 5.6 14.1 6.4 15.9 S 2.3 4.3 5.3 3.2 6.3
Shallow draft S - 5.6 - 6.4 - S - 6 - 4.2 -
Deep draft S - S - S - S - S - S -
Air (includes truck and air) 0.1 3.3 - S S S - 1.2 - S S S
Pipeline 3 S S S S S S S S S S S S
Multiple modes 5.7 3.7 S S 5.8 3.4 1.7 1.8 S S 2.4 1.6
Parcel, U.S.P.S. or courier 0.9 2.3 - - - - 0.4 1 - - - -
Truck and rail 2.9 - 1.1 - 2.9 - 0.9 - 0.3 - 1.1 -
Truck and water S - S - S - S - S - S -
Rail and water S - S - S - S - S - S -
Other multiple modes S 1.4 S S S 3.4 S 1.1 S S S 1.6
Other and unknown modes 0.1 0.7 S S S S - 0.3 S S S S

KEY: S = Estimate does not meet publication standards because of high sampling variability or poor response quality. - = Zero or Less than half the unit shown; thus, it has been rounded down to zero.

1 Ton-miles estimates are based on estimated distances traveled along a modeled transportation network.
2 "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.
3 Estimates for pipeline exclude shipments of crude petroleum.

NOTES: Rows are not shown if all cells for that particular row have no value. For example, certain Haz Class by mode rows are not shown in this table becuse there are no data for those rows. Value-of-shipment estimates are reported in current prices. 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