Table 7c. Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: Percent of Total for 2007 and 2002

Table 7c. Hazardous Material Shipment Characteristics by Hazard Class Division 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.

Division 1.1, Explosives with a mass explosion hazard

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Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes S 100 S S S S S - S S S S
Single modes S 97.5 S S S S S 1.0 S S S S
Truck 2 S 97.5 S S S S S 1.0 S S S S
For-hire truck S 71.7 S S S S S 13.4 S S S S
Private truck S S S S S S S S S S S S
Rail S - S - S - S - S - S -
Water S - S - S - S - S - S -
Deep draft S - S - S - S - S - S -
Air (includes truck and air) S - S - S - S - S - S -
Multiple modes S S S S S S S S S S S S
Parcel, U.S.P.S. or courier S S S S S S S S S S S S
Other and unknown modes S S 0.2 S - S S S 5.6 S 0.7 S

Division 1.2, Explosives with a projection hazard

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes S S S S S S S S S S S S
Single modes S S S S S S S S S S S S
Truck 2 S S S S S S S S S S S S
For-hire truck S S S S S S S S S S S S
Private truck S - S - S - S - S - S -

Division 1.3, Explosives with predominantly a fire hazard

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 S 100 100 100 100 - S - - - -
Single modes 100.0 S 100.0 100.0 100.0 100.0 - S - - - -
Truck 2 100.0 S 100.0 S 100.0 89.5 - S - S - 5.2
For-hire truck 45.5 S S S 83.6 S 17.9 S S S 15.2 S
Private truck S S S S S S S S S S S S
Multiple modes S - S - S - S - S - S -
Parcel, U.S.P.S. or courier S - S - S - S - S - S -

Division 1.4, Explosives with no significant blast hazard

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 100 100 100 100 100 - - - - - -
Single modes 90.1 97.4 96.9 98.4 96.1 97.5 6.0 3.5 2.7 1.8 1.6 1.9
Truck 2 89.5 96.0 96.7 98.3 95.5 97.1 6.0 3.3 3.1 1.9 2.6 2.3
For-hire truck 79.5 87.6 82.7 94.6 90.2 95.4 6.4 3.9 5.2 2.7 2.5 2.7
Private truck S S S 3.7 S S S S S 1.9 S S
Air (includes truck and air) S S S - S S S S S 0.3 S S
Multiple modes 9.6 2.6 3.0 S 3.8 S 5.8 3.5 2.5 S 1.5 S
Parcel, U.S.P.S. or courier 8.2 2.6 2.6 S 3.4 S 3.6 3.5 1.7 S 1.2 S
Truck and water S - S - S - S - S - S -
Other and unknown modes S S S S - S S S S S 0.1 S

Division 1.5, Very insensitive explosives, blasting agent

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 100 100 100 100 100 - - - - - -
Single modes 95.4 99.6 99.6 99.9 94.2 100.0 1.5 0.2 0.2 - 2.5 -
Truck 2 92.8 94.1 99.5 91.8 93.9 69.0 2.0 3.6 0.2 3.9 2.5 7
For-hire truck 35.0 15.2 13.6 22.2 49.0 36.8 5.6 5.5 5.4 9.2 5.7 9.3
Private truck 57.9 78.6 85.9 S 44.8 32.1 6.8 7.8 5.5 S 6.2 9.2
Air (includes truck and air) 2.6 S 0.1 S S S 1.3 S 0.1 S S S
Multiple modes 4.5 S S S S S 1.5 S S S S S
Parcel, U.S.P.S. or courier 3.5 S - S S S 1.6 S - S S S
Truck and water 1.0 - S - S - 2.0 - S - S -
Other and unknown modes 0.1 S - S - S - S - S - S

Division 2.1, Flammable gases

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 100 100 100 100 100 - - - - - -
Single modes 96.9 99.2 98.3 99.4 95.6 98.8 0.8 0.4 0.5 0.2 1.2 0.5
Truck 2 39.2 42.5 35.6 36.0 13.8 24.0 3.7 5.3 3.5 6.3 2.9 4.5
For-hire truck 6.5 15.6 6.4 15.2 6.0 16.5 1.0 3.1 1.2 3.4 1.6 4.6
Private truck 32.7 26.9 29.2 20.8 7.8 7.4 3.9 5.1 3.5 6.1 1.7 2.1
Rail 17.4 19.0 18.9 18.6 62.4 59.2 4.5 2.8 4.5 3 4.5 4.3
Water 1.2 3.8 1.4 5.1 2.2 5.7 0.5 1.1 0.7 2.3 1.4 2.2
Shallow draft 0.4 - 0.4 - S - 0.4 - 0.5 - S -
Deep draft 0.8 - 1.1 - S - 0.7 - 1 - S -
Air (includes truck and air) 0.1 S - S S S 0.1 S - S S S
Pipeline 3 39.0 33.7 42.4 39.8 S S 5.6 4.5 5.9 5.1 S S
Multiple modes 2.7 0.3 1.4 0.4 S 1.2 0.8 0.2 0.5 0.2 S 0.5
Parcel, U.S.P.S. or courier 1.2 S - S - S 0.5 S - S - S
Truck and rail S - S - S - S - S - S -
Truck and water S - S - S - S - S - S -
Rail and water 0.5 - 0.5 - 0.4 - 0.9 - 1.1 - 0.9 -
Other multiple modes S 0.2 S 0.4 S 1.2 S - S 0.2 S 0.5
Other and unknown modes 0.4 S 0.3 0.2 S - 0.2 S 0.1 - S -

Division 2.2, Nonflammable, nontoxic compressed gases

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 100 100 100 100 100 - - - - - -
Single modes 94.9 97.2 98.1 99.7 95.7 99.0 1.2 1.2 0.7 0.3 2.1 2.2
Truck 2 83.1 92.9 80.2 60.7 68.2 72.6 4.5 2.0 5.5 9.9 6.7 7.9
For-hire truck 32.5 49.0 13.3 6.9 36.7 23.7 5.1 8.2 3.1 6.8 7.9 9.8
Private truck 50.6 43.8 66.9 53.5 31.5 46.8 4.8 7.8 7.9 9.4 7.5 9.7
Rail 5.3 0.8 2.5 0.6 9.2 S 1.1 0.3 0.5 0.6 2.3 S
Water S S S S S S S S S S S S
Shallow draft S - S - S - S - S - S -
Air (includes truck and air) S 0.7 S S S S S 0.2 S S S S
Pipeline 3 5.5 S 15.1 S S S 4.2 S 4.6 S S S
Multiple modes 3.7 2.0 1.3 0.1 4.2 S 1.0 1.2 0.6 0.1 2 S
Parcel, U.S.P.S. or courier 1.2 1.7 S S - - 0.4 1.2 S S - -
Truck and rail 2.0 - 1.1 - 3.6 - 1.1 - 0.6 - 2.5 -
Truck and water S - S - S - S - S - S -
Other multiple modes S 0.3 S S S S S 0.1 S S S S
Other and unknown modes 1.3 0.8 0.6 0.2 0.1 S 0.4 0.2 0.3 0.1 0.1 S

Division 2.3, Gases toxic by inhalation

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 100 100 100 100 100 - - - - - -
Single modes 95.5 98.5 99.3 98.7 99.7 99.5 1.5 0.4 0.6 0.7 0.3 0.2
Truck 2 60.8 70.6 S 51.2 S 27.5 6.6 7.4 S 6.2 S 6.1
For-hire truck 32.1 34.0 S 25.2 S 16.1 5.9 7.3 S 5.7 S 5.8
Private truck 28.7 36.6 20.8 25.9 7.8 S 4.0 7.0 2.9 4.5 1.9 S
Rail 26.2 16.8 40.8 24.8 61.9 52.2 6.2 4.9 7.7 5.9 7.8 7.9
Water S S S S S S S S S S S S
Shallow draft S - S - S - S - S - S -
Air (includes truck and air) S S S S S S S S S S S S
Pipeline 3 6.8 9.0 14.7 19.1 S S 2.3 5.5 5.1 6.1 S S
Multiple modes S S S S S S S S S S S S
Parcel, U.S.P.S. or courier S S S S S - S S S S S -
Truck and rail S - S - S - S - S - S -
Truck and water S - S - S - S - S - S -
Other and unknown modes S 1.2 0.2 S S 0.5 S 0.5 0.2 S S 0.2

Division 4.1, Flammable solids

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 100 100 100 100 100 - - - - - -
Single modes 75.4 86.3 95.6 99.7 96.9 99.5 7.6 6.2 2.5 0.2 1.9 0.5
Truck 2 44.5 73.4 50.7 54.8 19.6 16.4 11.0 9.4 7.3 6.4 8 5.9
For-hire truck 31.8 9.9 33.9 37.4 12.4 12.7 9.1 6.3 9 6.7 8 4.2
Private truck 12.7 63.4 16.8 17.5 S 3.7 5.5 10.6 3.3 4.4 S 2.8
Rail S S 20.2 30.3 65.6 67.8 S S 5.4 5 11.2 7.5
Water S 0.5 S 13.7 S S S 0.7 S 5.4 S S
Shallow draft S - S - S - S - S - S -
Deep draft S - S - S - S - S - S -
Air (includes truck and air) 0.3 S S S - S 0.7 S S S - S
Pipeline 3 0.4 S S S S S 0.4 S S S S S
Multiple modes S S S S S S S S S S S S
Parcel, U.S.P.S. or courier 0.4 1.3 S - S - 0.3 2.2 S - S -
Truck and rail S - S - S - S - S - 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 S S S S S S S S S S S S

Division 4.2, Spontaneously combustible materials

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 100 100 100 S 100 - - - - S -
Single modes 80.7 94.7 86.6 98.9 S 97.3 7.1 1.5 5.9 1.1 S 2.8
Truck 2 79.6 84.0 85.7 66.5 S S 7.1 3.9 6 9.7 S S
For-hire truck 73.2 S 35.3 59.4 S S 10.8 S 12.3 10.8 S S
Private truck 6.4 25.6 S 7.0 S S 14.5 9.9 S 9 S S
Rail S 10.5 S S S 47.5 S 2.9 S S S 13.1
Water - - - - - - - - - - - -
Air (includes truck and air) S S S S S S S S S S S S
Pipeline 3 - - - - - S - - - - - S
Multiple modes S 5.2 S 0.7 S S S 1.5 S 1.1 S S
Parcel, U.S.P.S. or courier S 5.2 S 0.6 S S S 1.5 S 1.1 S S
Truck and rail S - S - S - S - S - S -
Other multiple modes - S - S - S - S - S - S
Other and unknown modes S S S S S S S S S S S S

Division 4.3, Dangerous when wet materials

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 S 100 100 100 S - S - - - S
Single modes 95.5 S 97.4 95.4 87.1 S 2.4 S 2.5 5.8 5.1 S
Truck 2 74.3 S 90.0 90.0 61.0 S 7.0 S 7.8 7 14 S
For-hire truck 48.6 S 50.8 S S S 10.1 S 11.5 S S S
Private truck 25.8 11.3 39.1 35.3 S S 10.6 9.1 12.5 10.8 S S
Rail 20.3 S S S S S 14.0 S S S S S
Water - - - - - - - - - - - -
Air (includes truck and air) S S S S - S S S S S - S
Pipeline 3 - - - - - S - - - - - S
Multiple modes S 3.8 S S S S S 3.3 S S S S
Parcel, U.S.P.S. or courier S S S S S S S S S S S S
Truck and rail S - S - S - S - S - S -
Other multiple modes - S - S - S - S - S - S
Other and unknown modes 0.1 S 0.1 S - S 0.7 S 0.9 S 1.1 S

Division 5.1, Oxidizers

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 100 100 100 100 100 - - - - - -
Single modes 92.9 97.1 92.7 96.9 89.2 94.5 2.9 2.0 3.4 1.7 5.9 2.4
Truck 2 62.2 81.1 51.9 76.2 30.7 60.5 4.7 5.2 5.6 6.6 6.7 8.5
For-hire truck 33.9 36.1 29.6 50.1 24.0 S 3.2 7.5 2.7 8.4 5 S
Private truck 28.3 44.8 22.4 25.7 6.7 7.3 3.9 7.7 5.2 6.2 3.3 2.7
Rail 29.0 16.0 40.1 20.6 58.5 34.0 4.3 5.2 5.6 6.5 7.6 8.8
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 0.6 S - - S S
Pipeline 3 S - S - S S S - S - S S
Multiple modes 6.1 1.8 6.5 S 9.7 S 2.8 1.8 3.3 S 5.9 S
Parcel, U.S.P.S. or courier 0.8 S - S - S 0.6 S - S - S
Truck and rail 4.7 - 6.4 - 8.9 - 2.6 - 3.6 - 6.7 -
Truck and water S - S - S - S - S - S -
Other multiple modes - 1.6 - S - S - 1.9 - S - S
Other and unknown modes S S S S S S S S S S S S

Division 5.2, Organic peroxides

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 100 100 S 100 S - - - S - S
Single modes 97.5 99.5 97.7 S 94.4 S 3.5 1.2 4.1 S 7.6 S
Truck 2 97.5 S 97.7 S 94.4 S 3.5 S 4.1 S 7.6 S
For-hire truck 82.8 S 88.9 S 90.9 S 7.3 S 5.2 S 8 S
Private truck 14.7 S S 1.5 S 0.4 6.0 S S 14.5 S 11.8
Rail - S - S - S - S - S - S
Water - - - - - - - - - - - -
Air (includes truck and air) S S S S S S S S S S S S
Pipeline 3 - - - - - S - - - - - S
Multiple modes S S S S S S S S S S S S
Parcel, U.S.P.S. or courier S S S S S S S S S S S S
Truck and rail S - S - S - S - S - S -
Other multiple modes - - - - - - - - - - - -
Other and unknown modes S S S S S S S S S S S S

Division 6.1, Toxic (poisonous) materials

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes 100 - 100 - 100 - - - - - - -
Single modes 94.8 - 92.7 - 98.0 - 1.2 - 2.2 - 1 -
Truck 2 47.8 - 26.2 - 15.0 - 5.5 - 4.6 - 3.7 -
For-hire truck 41.0 - 21.4 - 13.7 - 5.0 - 4.1 - 3.2 -
Private Truck 6.8 - 4.8 - 1.3 - 3.6 - 1.3 - 0.7 -
Rail 32.0 - 47.5 - 80.8 - 5.5 - 9.3 - 5.3 -
Water S - 16.4 - S - S - 13.5 - 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 - 0.1 - - - S -
Pipeline 3 S - 2.6 - S - S - 1.7 - S -
Multiple modes 5.0 - 7.2 - 2.0 - 1.2 - 2.2 - 1 -
Parcel, U.S.P.S. or courier S - 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 - 6.8 - 1.5 - S - 2.9 - 1.7 -
Other and unknown modes 0.1 - S - - - 0.1 - S - - -

Division 6.2, Infectious substances

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton-miles (percent) 1 Value Standard Error of % Tons Standard Error of % Ton-miles Standard Error of %
2007 2002 2007 2002 2007 2002 2007 2002 2007 2002 2007 2002
All modes S - S - S - S - S - S -
Single modes S - S - S - S - S - S -
Truck 2 S - S - S - S - S - S -
Private Truck S - S - 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 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 values. For example, specific Haz Class Division by mode rows are not shown in this table because 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.