Table B-8. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Selected UN Numbers and Mode of Transportation: 2002

Table B-8. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Selected UN Numbers and Mode of Transportation: 2002

[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]

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UN 1066, NITROGEN, COMPRESSED

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 33.9 42.1 S S 20.8
Single modes 34.0 0.3 42.1 S S 22.3
Truck 35.2 4.0 37.3 7.3 49.7 1.6 22.4
For– hire truck S S S S S S 38.6
Private truck 34.4 12.3 41.2 10.4 S S 26.3
Rail S S S S S S 31.6
Water S S S S S S 31.6
Air (includes truck and air) S S S S S S 29.8
Pipeline S S S S S S S
Multiple modes S S S S S S 29.8
Parcel, U.S.P.S. or courier S S S S S S 29.8
Other multiple modes
Other and unknown modes S S S S S S 29.1

UN 1072, OXYGEN, COMPRESSED

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 38.2 S S S S S
Single modes 38.6 0.5 S S S S S
Truck 42.6 6.2 S S S S S
For– hire truck S S S S 46.0 12.3 35.8
Private truck 17.9 14.8 33.1 18.0 S S 36.2
Rail
Water
Air (includes truck and air) S S S S S S 29.8
Pipeline S S S S S S S
Multiple modes 45.0 S S S S S
Parcel, U.S.P.S. or courier S S S S S S S
Other multiple modes S S S S S S 32.6
Other and unknown modes 44.3 0.6 S S S S 28.2

UN 1075, PETROLEUM GASES

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 12.9 14.0 26.0 43.5
Single modes 12.8 0.5 13.9 0.3 26.2 1.2 40.8
Truck 18.2 5.4 21.8 5.4 45.8 6.1 39.5
For– hire truck 37.9 4.4 35.7 5.3 S S 19.0
Private truck 17.3 5.0 26.6 5.2 46.3 2.4 29.8
Rail 32.4 4.3 29.3 4.9 28.4 7.8 6.0
Water 35.8 0.3 33.7 0.3 44.8 1.0 28.4
Air (includes truck and air)
Pipeline 21.5 5.4 20.7 5.8 S S S
Multiple modes 38.3 0.1 44.7 0.3 49.8 1.2 38.0
Parcel, U.S.P.S. or courier S S S S S S S
Other multiple modes 38.7 0.1 44.7 0.3 49.8 1.2 S
Other and unknown modes S S 49.6 44.5 S

UN 1202, GAS OIL, DIESEL FUEL, HEATING OIL, LIGHT

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 11.3 11.1 21.5 16.0
Single modes 12.1 1.0 11.8 1.0 26.2 9.3 19.1
Truck 13.5 6.7 12.5 6.2 37.9 7.6 20.7
For– hire truck 9.5 2.8 10.4 2.8 S S 49.2
Private truck 20.3 5.0 17.9 4.2 30.2 5.4 13.3
Rail S S S S S S 25.7
Water S S S S S S S
Air (includes truck and air)
Pipeline 22.8 6.8 20.2 6.4 S S S
Multiple modes 42.2 1.0 41.1 1.0 S S 25.6
Parcel, U.S.P.S. or courier S S S S S S 31.6
Other multiple modes 42.2 1.0 41.1 1.0 S S 25.9
Other and unknown modes S S 46.4 0.7 S S S

UN 1203, GASOLINE

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 3.6 3.8 11.1 10.7
Single modes 3.5 0.3 3.6 0.2 11.5 1.6 14.3
Truck 5.1 2.3 5.9 2.2 11.7 5.7 14.6
For– hire truck 7.5 1.3 9.7 1.6 21.9 4.5 21.6
Private truck 5.9 2.1 6.0 1.8 13.4 2.8 15.2
Rail 23.9 34.9 0.2 43.3 1.2 18.3
Water 24.3 1.3 24.6 1.8 19.0 3.5 S
Air (includes truck and air) S S S S S S 30.0
Pipeline 8.1 1.9 8.0 2.0 S S S
Multiple modes 41.3 0.2 38.5 0.1 39.1 1.0 37.3
Parcel, U.S.P.S. or courier 45.6 0.1 45.2 41.0 13.4
Other multiple modes 40.8 0.1 38.6 0.1 39.3 1.0 25.7
Other and unknown modes 37.2 0.3 35.7 0.2 S S S

UN 1824, SODIUM HYDROXIDE SOLUTION

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 20.2 15.3 15.9 19.7
Single modes 20.7 1.4 15.7 1.6 16.6 3.8 23.2
Truck 25.9 4.6 25.6 4.2 43.7 4.7 25.2
For– hire truck 41.9 5.3 17.9 2.9 30.8 2.8 15.8
Private truck 20.2 5.0 40.3 3.1 S S 24.2
Rail 24.9 4.8 14.4 5.3 15.9 7.5 5.4
Water 24.7 2.4 24.6 5.3 42.0 7.8 32.8
Air (includes truck and air)
Pipeline 38.1 0.6 33.6 1.7 S S S
Multiple modes 40.2 0.9 S S S S S
Parcel, U.S.P.S. or courier 44.4 0.5 48.7 S S 30.6
Other multiple modes S S S S S S S
Other and unknown modes S S S S S S 26.9

UN 1863, FUEL, AVIATION, TURBINE ENGINE

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 11.7 12.3 19.3 14.6
Single modes 12.0 0.6 12.5 0.6 19.3 0.3 16.2
Truck 9.2 2.4 11.4 2.9 23.5 7.1 19.8
For– hire truck 15.4 1.6 16.0 1.6 35.4 6.6 17.7
Private truck 21.5 2.2 28.0 2.8 25.9 1.3 32.3
Rail 39.4 2.6 39.1 2.7 40.4 8.1 23.5
Water 31.0 3.6 34.0 4.0 34.4 10.6 22.8
Air (includes truck and air) S S S S S S 31.6
Pipeline 17.6 4.7 18.9 5.5 S S S
Multiple modes S S S S S S S
Parcel, U.S.P.S. or courier S S S S S S S
Other multiple modes S S S S S S 30.6
Other and unknown modes S S S S S S 34.8

UN 1964,HYDROCARBON GAS MIXTURE, COMPRESSED, N.O.S.

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 33.9 36.3 32.1 15.1
Single modes 34.2 0.3 36.4 0.5 32.2 0.2 14.5
Truck 40.7 8.9 S S 38.8 7.0 20.4
For– hire truck 19.7 3.6 29.1 8.0 S S S
Private truck S S S S S S 19.6
Rail 19.4 7.2 31.4 7.2 30.9 6.3 8.6
Water S S S S S S 46.7
Air (includes truck and air) S S S S S S 31.6
Pipeline 45.7 9.4 44.2 9.5 S S S
Multiple modes S S S S S S 29.2
Parcel, U.S.P.S. or courier S S S S S S 29.2
Other multiple modes
Other and unknown modes 32.7 0.3 S S S S S

UN 1993, FLAMMABLE LIQUIDS, N.O.S.

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 8.7 8.4 9.6 19.2
Single modes 8.3 0.8 8.1 0.9 10.4 3.3 11.8
Truck 7.4 2.0 6.4 1.5 12.4 3.4 13.9
For– hire truck 7.9 1.4 7.2 1.3 31.8 3.2 28.2
Private truck 9.1 1.4 8.3 1.3 12.0 3.4 12.7
Rail 21.8 0.4 21.1 0.4 25.8 2.0 10.0
Water 16.6 1.2 14.3 1.3 16.5 2.9 S
Air (includes truck and air) 44.8 S S S S 20.5
Pipeline 16.1 2.5 17.1 2.7 S S S
Multiple modes S S S S S S 20.5
Parcel, U.S.P.S. or courier 31.2 26.5 S S 22.3
Other multiple modes S S S S S S S
Other and unknown modes 32.5 0.2 42.7 0.3 28.2 34.7

UN 3257, ELEVATED TEMPERATURE LIQUID, N.O.S.

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 25.4 25.6 17.8 22.9
Single modes 25.6 0.6 26.0 1.1 18.0 1.0 23.0
Truck 32.6 8.6 31.5 8.0 24.9 6.7 16.6
For– hire truck 31.6 8.2 31.4 7.5 28.3 4.4 14.1
Private truck 40.5 5.8 36.8 5.5 24.2 3.8 23.6
Rail 19.9 3.5 25.9 4.1 21.2 6.1 6.3
Water S S 46.7 7.5 S S 28.1
Air (includes truck and air)
Pipeline S S S
Multiple modes S S S S S S 35.2
Parcel, U.S.P.S. or courier
Other multiple modes S S S S S S 35.2
Other and unknown modes

ALL OTHER

UN number 1, description, and mode of transportation Value Tons Ton-miles Average miles
per shipment
2002
(million $)
Percent 2002
(thousands)
Percent 2002
(millions)
Percent
All modes 6.5 13.0 7.5 11.7
Single modes 6.8 0.5 12.8 0.3 7.2 1.1 8.8
Truck 8.0 2.4 10.0 2.2 8.4 2.3 12.6
For– hire truck 9.9 2.8 8.1 2.1 10.4 3.0 7.2
Private truck 11.7 2.2 16.1 1.7 23.4 1.3 8.3
Rail 11.7 1.3 11.6 1.3 9.7 2.6 4.4
Water 15.4 0.7 19.1 1.7 16.7 1.9 20.7
Air (includes truck and air) 20.8 0.2 40.4 41.8 7.8
Pipeline 24.3 1.4 27.0 2.2 S S S
Multiple modes 12.4 0.4 34.8 0.3 32.3 1.2 12.8
Parcel, U.S.P.S. or courier 14.0 0.3 19.3 16.8 13.3
Other multiple modes 19.7 0.3 36.3 0.3 33.1 1.2 25.5
Other and unknown modes 29.7 0.3 27.0 0.1 26.6 0.1 39.2

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.