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Table 7c. Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: Percent of Total for 2002 and 1997

[Estimates are based on data from the 2002 and 1997 Commodity Flow Surveys. Because of rounding, estimates may not be additive]

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Division 1.1, Explosives with a mass explosion hazard

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton–miles (percent)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 S S S S
Single modes 97.5 99.6 S S S S
Truck 1 97.5 69.9 S 45.6 S S
For–hire truck 71.7 46.4 S 15.0 S 7.2
Private truck S 23.5 S S S S
Rail – S – S – S
Water – – – – – –
Air (includes truck and air) – S – S – S
Pipeline 2 – – – – S S
Multiple modes S S S S S S
Parcel, U.S.P.S. or courier S S S S S S
Other multiple modes – – – – – –
Other and unknown modes S S S S S S

Division 1.2, Explosives with a projection hazard

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton–miles (percent)
2002 1997 2002 1997 2002 1997
All modes S S S 100.0 S 100.0
Single modes S S S 99.9 S 99.8
Truck 1 S S S 99.5 S 99.4
For–hire truck S S S 98.1 S 99.4
Private truck – S – S – S
Rail – – – – – –
Water – – – – – –
Air (includes truck and air) – S – S – S
Pipeline 2 – – – – S S
Multiple modes – – – – – –
Parcel, U.S.P.S. or courier – – – – – –
Other multiple modes – – – – – –
Other and unknown modes – 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)
2002 1997 2002 1997 2002 1997
All modes S 100.0 100.0 100.0 100.0 100.0
Single modes S 91.5 100.0 76.1 100.0 83.0
Truck 1 S 91.1 S 76.1 89.5 82.9
For–hire truck S 87.4 S 66.7 S 81.0
Private truck S 3.7 S S S S
Rail S – S – S –
Water – – – – – –
Air (includes truck and air) S S S S S S
Pipeline 2 – – – – S S
Multiple modes – S – S – S
Parcel, U.S.P.S. or courier – S – S – S
Other multiple modes – – – – – –
Other and unknown modes – 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)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 97.4 81.7 98.4 93.4 97.5 92.3
Truck 1 96.0 65.4 98.3 84.8 97.1 76.7
For–hire truck 87.6 49.7 94.6 62.3 95.4 67.0
Private truck S 15.5 3.7 22.5 S 9.6
Rail S S S S S S
Water – – – – – –
Air (includes truck and air) S 6.9 – 0.3 S 0.4
Pipeline 2 – – – – S S
Multiple modes 2.6 16.3 S 5.3 S 6.7
Parcel, U.S.P.S. or courier 2.6 16.2 S 5.2 S 6.4
Other multiple modes – S – S – S
Other and unknown modes S 2.0 S 1.3 S S

Division 1.5, Very insensitive explosives, blasting agent

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton–miles (percent)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 99.6 99.7 99.9 99.4 100.0 99.4
Truck 1 94.1 99.7 91.8 99.4 69.0 99.4
For–hire truck 15.2 7.7 22.2 9.3 36.8 20.1
Private truck 78.6 92.0 S 90.1 32.1 S
Rail 5.1 – 8.1 – 31.0 –
Water – – – – – –
Air (includes truck and air) S – S – S –
Pipeline 2 – – – – S S
Multiple modes S S S S S S
Parcel, U.S.P.S. or courier S – S – S –
Other multiple modes – S – S – S
Other and unknown modes 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)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 99.2 95.6 99.4 97.9 98.8 98.1
Truck 1 42.5 40.3 36.0 33.2 24.0 23.5
For–hire truck 15.6 13.7 15.2 16.1 16.5 15.7
Private truck 26.9 26.2 20.8 16.7 7.4 7.7
Rail 19.0 10.3 18.6 10.6 59.2 48.6
Water 3.8 3.8 5.1 5.2 5.7 9.8
Air (includes truck and air) S S S S S S
Pipeline 2 33.7 41.2 39.8 48.9 S S
Multiple modes 0.3 0.8 0.4 0.6 1.2 0.9
Parcel, U.S.P.S. or courier S – S – S –
Other multiple modes 0.2 0.7 0.4 0.6 1.2 0.9
Other and unknown modes S 3.7 0.2 1.5 – S

Division 2.2, Nonflammable, nontoxic compressed gases

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton–miles (percent)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 97.2 94.9 99.7 96.3 99.0 97.3
Truck 1 92.9 84.2 60.7 82.7 72.6 61.6
For–hire truck 49.0 35.5 6.9 8.6 23.7 15.6
Private truck 43.8 48.5 53.5 73.9 46.8 45.2
Rail 0.8 2.0 0.6 1.3 S 5.2
Water S S S S S S
Air (includes truck and air) 0.7 3.8 S – S –
Pipeline 2 S 3.5 S 11.9 S S
Multiple modes 2.0 2.1 0.1 S S 0.4
Parcel, U.S.P.S. or courier 1.7 2.0 S S – S
Other multiple modes 0.3 0.2 S S S S
Other and unknown modes 0.8 2.9 0.2 S S S

Division 2.3, Gases toxic by inhalation

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton–miles (percent)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 98.5 96.3 98.7 93.0 99.5 99.2
Truck 1 70.6 40.3 51.2 33.7 27.5 14.1
For–hire truck 34.0 21.0 25.2 19.3 16.1 S
Private truck 36.6 19.0 25.9 14.0 S 2.9
Rail 16.8 46.7 24.8 40.0 52.2 71.5
Water S 3.8 S 9.7 S 9.2
Air (includes truck and air) S S S S S S
Pipeline 2 9.0 5.4 19.1 9.6 S S
Multiple modes S S S S S S
Parcel, U.S.P.S. or courier S S S – – S
Other multiple modes S S S S S S
Other and unknown modes 1.2 3.6 S S 0.5 S

Division 4.1, Flammable solids

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton–miles (percent)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 86.3 93.2 99.7 99.0 99.5 98.7
Truck 1 73.4 78.7 54.8 36.7 16.4 5.8
For–hire truck 9.9 48.5 37.4 28.8 12.7 4.9
Private truck 63.4 29.7 17.5 5.9 3.7 0.8
Rail S 11.6 30.3 58.2 67.8 92.5
Water 0.5 S 13.7 S S S
Air (includes truck and air) S S S S S S
Pipeline 2 S S S 3.8 S S
Multiple modes S S S S S S
Parcel, U.S.P.S. or courier 1.3 S – – – –
Other multiple modes S S S S S S
Other and unknown modes 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)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 94.7 98.9 98.9 99.3 97.3 99.4
Truck 1 84.0 54.3 66.5 58.6 S 21.3
For–hire truck S 36.5 59.4 40.3 S 16.9
Private truck 25.6 17.8 7.0 18.3 S 4.4
Rail 10.5 44.5 S 40.8 47.5 78.1
Water – – – – – –
Air (includes truck and air) S S S – S –
Pipeline 2 – – – – S S
Multiple modes 5.2 S 0.7 S S S
Parcel, U.S.P.S. or courier 5.2 S 0.6 S S S
Other multiple modes S S S S S S
Other and unknown modes 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)
2002 1997 2002 1997 2002 1997
All modes S 100.0 100.0 S S 100.0
Single modes S 93.7 95.4 S S 97.6
Truck 1 S 81.6 90.0 S S 55.8
For–hire truck S 58.5 S 14.0 S 38.7
Private truck 11.3 22.9 35.3 S S S
Rail S 11.8 S 4.9 S 41.8
Water – S – S – S
Air (includes truck and air) S S S S S S
Pipeline 2 – – – – S S
Multiple modes 3.8 S S S S S
Parcel, U.S.P.S. or courier 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

Division 5.1, Oxidizers

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton–miles (percent)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 97.1 97.3 96.9 97.7 94.5 98.2
Truck 1 81.1 70.4 76.2 62.9 60.5 34.3
For–hire truck 36.1 42.7 50.1 31.7 S 25.5
Private truck 44.8 27.4 25.7 31.1 7.3 8.7
Rail 16.0 26.9 20.6 34.8 34.0 63.9
Water – S – S – S
Air (includes truck and air) S S – – S S
Pipeline 2 – – – – S S
Multiple modes 1.8 0.8 S S S S
Parcel, U.S.P.S. or courier S S S S S –
Other multiple modes 1.6 S S S S S
Other and unknown modes S 1.9 S S S S

Division 5.2, Organic peroxides

Hazard Class Division and Mode of Transportation Value (percent) Tons (percent) Ton–miles (percent)
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 S 100.0 S 100.0
Single modes 99.5 97.5 S 97.3 S 95.5
Truck 1 S 97.5 S 97.3 S 95.5
For–hire truck S 58.8 S 61.9 S 61.9
Private truck S 35.0 1.5 28.8 0.4 S
Rail S – S – S –
Water – – – – – –
Air (includes truck and air) S S S S S S
Pipeline 2 – – – – S S
Multiple modes S S S S S S
Parcel, U.S.P.S. or courier S S S S S S
Other multiple modes – S – S – S
Other and unknown modes S S S S S S

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.

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.

SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.
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