Table 6c. Hazardous Material Shipment Characteristics by Hazard Class and Mode of Transportation: Percent of Total for 2002 and 1997

Table 6c. Hazardous Material Shipment Characteristics by Hazard Class 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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Class 1, Explosives

Hazard Class and Mode of Transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 S
Single modes 98.1 89.7 99.7 97.9 99.3 S
Truck 1 95.8 73.6 92.6 73.8 77.0 39.1
For-hire truck 78.1 54.7 31.0 23.9 53.3 21.8
Private truck 17.7 18.8 S 49.9 23.7 S
Rail 1.2 12.6 7.0 S 22.1 S
Water
Air (includes truck and air) S 3.6 0.1
Pipeline 2 S S
Multiple modes 1.7 8.2 S 1.1 S 1.3
Parcel, U.S.P.S. or courier 1.7 8.1 S 1.1 S 1.2
Other multiple modes S S S
Other and unknown modes S S S S S S

Class 2, Gases

Hazard Class and Mode of Transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 98.4 95.5 99.4 96.7 98.9 98.3
Truck 1 63.6 52.0 45.4 45.6 36.3 28.1
For-hire truck 29.6 20.4 13.8 14.7 18.2 14.0
Private truck 34.0 31.2 31.5 30.5 17.6 13.8
Rail 12.1 12.6 13.7 13.1 44.6 47.8
Water 2.3 3.2 3.3 4.7 4.7 7.8
Air (includes truck and air) 0.3 1.0 S S
Pipeline 2 20.0 26.7 37.0 33.3 S S
Multiple modes 0.9 1.1 0.3 0.4 0.9 0.5
Parcel, U.S.P.S. or courier 0.7 0.6 S S S
Other multiple modes 0.2 0.5 0.3 0.4 0.9 0.4
Other and unknown modes 0.7 3.5 0.3 S 0.2 1.2

Class 3, Flammable Liquids

Hazard Class and Mode of Transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 97.9 97.7 98.4 98.4 94.6 90.0
Truck 1 60.5 61.4 53.0 54.3 31.0 27.5
For-hire truck 24.4 23.7 19.4 19.4 16.3 14.1
Private truck 35.5 37.1 33.2 34.2 14.4 12.9
Rail 2.6 3.0 2.0 2.0 11.3 11.6
Water 8.4 6.9 11.1 9.5 27.7 26.0
Air (includes truck and air) S S S
Pipeline 2 26.4 24.6 32.2 32.7 S S
Multiple modes 1.1 0.9 0.9 0.7 4.5 S
Parcel, U.S.P.S. or courier 0.4 0.1
Other multiple modes 0.8 0.8 0.9 0.7 4.5 S
Other and unknown modes 0.9 1.3 0.7 0.8 S 0.5

Class 4, Flammable Solids

Hazard Class and Mode of Transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 90.8 94.8 99.2 99.0 98.7 98.7
Truck 1 78.4 73.2 59.4 52.5 31.6 9.6
For-hire truck 37.3 48.1 40.9 25.8 27.2 7.6
Private truck 41.0 24.8 18.4 S 4.4 1.9
Rail 9.5 20.2 27.9 43.7 56.2 88.7
Water 0.3 S 11.2 S S S
Air (includes truck and air) S 0.3 S S S S
Pipeline 2 S S S 2.6 S S
Multiple modes S 3.5 S S S S
Parcel, U.S.P.S. or courier 2.3 S S
Other multiple modes S S S S S S
Other and unknown modes S 1.7 S S S

Class 5, Oxidizers and organic peroxides

Hazard Class and Mode of Transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 97.5 97.3 97.1 97.7 95.0 98.2
Truck 1 83.8 72.4 77.9 63.2 64.2 35.1
For-hire truck 43.5 43.9 53.5 32.0 57.1 26.0
Private truck 40.2 28.0 24.0 31.1 6.6 8.8
Rail 13.6 24.9 19.2 34.4 30.8 63.1
Water S S S
Air (includes truck and air) S S S S
Pipeline 2 S S
Multiple modes 1.5 0.8 S S S S
Parcel, U.S.P.S. or courier S S S S
Other multiple modes 1.3 0.4 S S S S
Other and unknown modes S 1.9 S S S S

Class 6, Toxic (poison)

Hazard Class and Mode of Transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 93.1 93.2 97.4 97.8 97.0 96.0
Truck 1 59.0 72.1 26.7 44.6 19.9 34.2
For-hire truck 44.7 43.9 20.8 29.4 18.2 29.3
Private truck 14.3 27.2 5.8 14.0 1.7 4.4
Rail 13.8 14.6 22.6 30.6 40.3 51.2
Water 11.6 S 27.5 S S S
Air (includes truck and air) S 0.9 S S S S
Pipeline 2 S 1.8 20.7 5.9 S S
Multiple modes S 4.4 S 1.4 S S
Parcel, U.S.P.S. or courier 1.2 3.4 S S
Other multiple modes S 1.1 S 1.3 S S
Other and unknown modes S 2.4 S 0.8 0.9 0.6

Class 7, Radioactive materials

Hazard Class and Mode of Transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 92.5 79.7 92.3 76.5 87.7 68.0
Truck 1 91.7 53.5 91.0 64.4 84.5 36.2
For-hire truck 55.9 21.4 39.1 37.0 55.1 29.3
Private truck 35.8 32.1 51.9 27.4 S S
Rail S S S
Water
Air (includes truck and air) 0.7 17.0 1.2 8.4 3.2 21.9
Pipeline 2 S S S S
Multiple modes 7.5 12.9 7.3 13.0 12.1 31.3
Parcel, U.S.P.S. or courier 7.5 12.9 7.3 13.0 12.1 31.3
Other multiple modes
Other and unknown modes S S S S S S

Class 8, Corrosive materials

Hazard Class and Mode of Transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 96.5 95.0 98.0 96.8 96.0 97.4
Truck 1 83.0 68.0 56.7 50.4 43.6 28.9
For-hire truck 50.8 47.3 39.3 32.6 36.6 24.4
Private truck 31.8 19.9 17.3 17.6 6.9 4.5
Rail 10.3 18.1 26.4 26.1 43.0 41.8
Water 2.0 7.5 10.5 18.5 9.0 26.6
Air (includes truck and air) 0.4 0.4 S S
Pipeline 2 0.7 S 4.4 1.8 S S
Multiple modes 2.3 2.1 1.2 0.7 3.3 1.6
Parcel, U.S.P.S. or courier 1.6 1.5 S S
Other multiple modes 0.7 0.7 1.1 0.6 3.2 1.6
Other and unknown modes S 2.9 0.8 2.5 0.7 S

Class 9, Miscellaneous dangerous goods

Hazard Class and Mode of Transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes 100.0 100.0 100.0 100.0 100.0 100.0
Single modes 95.6 95.0 98.4 99.0 96.5 97.5
Truck 1 70.2 64.8 64.1 63.7 34.3 34.2
For-hire truck 46.4 48.5 37.6 40.9 21.3 27.0
Private truck 23.8 15.3 26.5 21.0 13.0 6.9
Rail 13.7 23.2 20.1 28.1 46.2 57.5
Water 8.3 S 14.1 S 15.9 S
Air (includes truck and air) 3.3 1.6 S S
Pipeline 2 S S S S S S
Multiple modes 3.7 3.5 S 0.6 3.4 1.8
Parcel, U.S.P.S. or courier 2.3 1.9
Other multiple modes 1.4 1.6 S 0.6 3.4 1.8
Other and unknown modes 0.7 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.