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Table B-7b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: 2002 and 1997

Monday, July 2, 2012

Table B-7b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Hazard Class Division and Mode of Transportation: 2002 and 1997

[Estimates are shown as percents and are based on data from the 2002 and 1997 Commodity Flow Surveys]

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Division 1.1, Explosives with a mass explosion hazard

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 33.9 22.7 12.7 S S S S S S S 15.9 S
Single modes 33.5 22.8 12.3 S S S S S S S 16 S
Truck 33.5 22.7 17.5 S 38.3 S S S S S 16.4 S
For-hire truck 44.3 29.9 25.6 S 26.1 S S 23.8 S 27.1 34.5 61.6
Private truck S 16 S S S S S S S 39.1 21.4 16.6
Rail &#8211 S S &#8211 S S &#8211 S S &#8211 27.6 &#8211
Water &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Air (includes truck and air) &#8211 S S &#8211 S S &#8211 S S &#8211 31.6 &#8211
Pipeline &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 S S S S S S
Multiple modes S S S S S S S S S 31.6 S S
Parcel, U.S.P.S. or courier S S S S S S S S S 31.6 S S
Other multiple modes &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Other and unknown modes S S S S S S S S S 31.6 44 2.9

Division 1.2, Explosives with a projection hazard

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes S S S S 42.8 S S 48.7 S 31.6 21.5 46.9
Single modes S S S S 42.8 S S 48.7 S 31.6 21.6 47.8
Truck S S S S 43 S S 49 S 31.6 21.5 47.7
For-hire truck S S S S 44 S S 49 S 31.6 19.8 44.6
Private truck &#8211 S S &#8211 S S &#8211 S S &#8211 31.6 &#8211
Rail &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Water &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Air (includes truck and air) &#8211 S S &#8211 S S &#8211 S S &#8211 31.6 &#8211
Pipeline &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 S S S S S S
Multiple modes &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Parcel, U.S.P.S. or courier &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Other multiple modes &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Other and unknown modes &#8211 S S &#8211 S S &#8211 S S &#8211 31.6 &#8211

Division 1.3, Explosives with predominantly a fire hazard

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes S 40.1 S 46.8 30.3 50.5 43.3 26.1 42.5 23.3 39.9 81.1
Single modes S 44.2 S 46.8 30.5 66.4 43.3 28.2 52.4 23.3 19.5 32.8
Truck S 44.4 S S 30.5 S 47.9 28.2 50.4 23.5 20.4 34.4
For-hire truck S 46.7 S S 30.7 S S 29.5 S 26.3 12.1 26.3
Private truck S 41.7 S S S S S S S 40 27.4 34.8
Rail S &#8211 S S &#8211 S S &#8211 S 31.6 &#8211 &#8211
Water &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Air (includes truck and air) S S S S S S S S S 31.6 29.8 42.5
Pipeline &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 S S S S S S
Multiple modes &#8211 S S &#8211 S S &#8211 S S &#8211 S S
Parcel, U.S.P.S. or courier &#8211 S S &#8211 S S &#8211 S S &#8211 S S
Other multiple modes &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Other and unknown modes &#8211 S S &#8211 S S &#8211 S S &#8211 29.8 &#8211

Division 1.4, Explosives with no significant blast hazard

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 27.0 11.8 56.0 34.4 19.3 69.3 26.7 17.7 58.2 8.4 8.5 11.9
Single modes 28.1 12.5 69.7 35.0 19.8 74.5 27.4 18.1 63.0 12.1 17.0 29.0
Truck 27.8 7.2 79.9 35.1 18.3 80.6 27.5 17.7 75.2 11.8 22.1 42.1
For-hire truck 25.2 11.6 92.8 36.6 21.9 113.7 27.9 19.4 87.9 8.4 10.7 12.7
Private truck S 26.6 S 41.7 28.4 14.6 S 38.4 S 32.9 18.1 47.0
Rail S S S S S S S S S 31.6 25.9 13.1
Water &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Air (includes truck and air) S 35.5 S 49.7 32.1 27.6 S 29.9 S 16.3 10.0 22.2
Pipeline &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 S S S S S S
Multiple modes 38.3 17.2 12.6 S 13.3 S S 17.5 S 10.8 7.9 12.1
Parcel, U.S.P.S. or courier 38.3 17.4 12.7 S 13.2 S S 16.8 S 10.8 7.9 12.1
Other multiple modes &#8211 S S &#8211 S S &#8211 S S &#8211 31.6 &#8211
Other and unknown modes S 47.8 S S 49.8 S S S S S 33.6 S

Division 1.5, Very insensitive explosives, blasting agent

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 35.9 13.4 138.8 47.9 18.8 359.3 38.1 41.6 641.9 S 11.7 S
Single modes 35.9 13.4 138.7 47.9 18.8 361.2 38.1 41.9 648.6 S 11.8 S
Truck 36.5 13.4 133.1 49.3 18.8 340.5 38.1 41.9 447.4 32.6 11.8 47.4
For-hire truck 48.5 34.8 426.5 45.7 40.9 S 46.2 37.8 S 15.4 30.2 41.2
Private truck 39.2 13.5 128.3 S 20.1 S 45.7 S S 49 14.5 50.6
Rail 44.9 &#8211 &#8211 41.6 &#8211 &#8211 44.6 &#8211 &#8211 24.2 &#8211 &#8211
Water &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Air (includes truck and air) S &#8211 S S &#8211 S S &#8211 S 28 &#8211 &#8211
Pipeline &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 S S S S S S
Multiple modes S S S S S S S S S 28.2 31.6 50.3
Parcel, U.S.P.S. or courier S &#8211 S S &#8211 S S &#8211 S 28.2 &#8211 &#8211
Other multiple modes &#8211 S S &#8211 S S &#8211 S S &#8211 31.6 &#8211
Other and unknown modes S S S S S S S S S 34.9 31.6 3.5

Division 2.1, Flammable gases

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 10.6 10.2 20.5 10.5 5.5 18.0 14.1 11.0 35.5 33.4 20.6 69.6
Single modes 10.7 9.0 20.2 10.5 5.5 18.2 13.9 11.6 36.2 33.8 22.0 75.1
Truck 11.5 18.1 31.4 19.7 11.2 37.2 35.4 10.9 75.0 36.9 17.8 75.5
For-hire truck 24.9 11.8 43.6 29.7 18.1 49.7 49.5 17.0 109.7 20.3 15.1 32.0
Private truck 14.5 28.1 45.2 28.1 12.1 57.6 39.1 14.9 80.4 22.4 10.2 30.3
Rail 20.5 9.6 57.8 19.1 10.6 57.8 15.9 21.3 64.3 7.5 16.1 19.4
Water 43.1 19.6 66.7 37.8 28.1 69.5 32.7 43.3 62.4 32.4 30.1 31.5
Air (includes truck and air) S S S S S S S S S 27.6 30.3 22.6
Pipeline 23.4 9.7 28.8 21.6 6.0 27.6 S S S S S S
Multiple modes 33.8 34.8 27.1 44.4 32.6 61.0 49.3 39.6 165.5 17.5 S S
Parcel, U.S.P.S. or courier S 30.2 S S 31.6 S S 48.9 S 25.1 31.1 47.4
Other multiple modes 38.7 39.4 21.5 44.7 32.7 61.2 49.8 40.0 167.9 S 30.9 S
Other and unknown modes S 49.7 S 32.7 47 8.9 38.7 S S S S S

Division 2.2, Nonflammable, nontoxic compressed gases

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 11.8 4.9 27.4 36.7 15.4 77.3 29.6 24.8 63.9 38.9 14.3 62.6
Single modes 12.1 5.2 29.0 36.8 14.5 79.5 30.1 25.5 66.4 34.9 18.7 65.1
Truck 12.7 6.4 33.7 27.2 13.1 43.1 29.1 13.9 62.8 35.3 18.3 68.5
For-hire truck 24.3 11.8 80.2 43.9 20.3 76.1 31.3 12.1 84.5 13.2 11.5 24.2
Private truck 23.0 8.5 47.5 31.7 13.7 48.5 42.7 16.4 78.4 37.7 11.9 55.9
Rail 41.8 29.9 44.3 45.3 26.0 44.4 S 29.3 S 19.2 17.4 32.4
Water S S S S S S S S S 31.7 29.3 3.1
Air (includes truck and air) 41.5 25.3 19.1 S 36.1 S S 31.4 S 19.2 11.7 23.9
Pipeline S 35.0 S S 42.8 S S S S S S S
Multiple modes 29.4 20.2 72.3 40.2 S S S 45.2 S 32.1 23.9 62.1
Parcel, U.S.P.S. or courier 35.7 21.9 79.5 S S S 28.3 S S 35.1 23.8 65.2
Other multiple modes 43.7 42.5 199.5 S S S S S S 27.5 S S
Other and unknown modes 37.0 26.4 26.8 29.5 S S S S S S S S

Division 2.3, Gases toxic by inhalation

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 11.8 21.0 28.3 13.9 14.5 22.3 11.3 27.1 19.3 27.3 32.2 54.4
Single modes 11.8 21.8 29.8 13.9 15.8 24.7 11.2 27.4 19.5 27.4 24.3 34.3
Truck 18.0 19.3 54.3 22.6 23.9 55.3 26.3 44.0 65.9 32.1 15.4 51.7
For-hire truck 29.8 38.3 92.2 35.3 43.4 80.8 35.7 S S 30.3 21.9 43.0
Private truck 23.2 14.2 61.6 26.4 18.5 65.9 S 16.5 S 31.0 15.7 45.1
Rail 17.9 33.3 16.0 11.5 18.4 14.9 12.7 30.6 15.9 9.7 8.7 9.4
Water S 41.4 S S 41.9 S S 41.0 S 31.8 26.6 18.7
Air (includes truck and air) S S S S S S S S S 25.8 32.6 23.0
Pipeline 43.5 34.2 107.1 40.4 41.1 127.4 S S S S S S
Multiple modes S S S S S S S S S 41.9 29.8 20.6
Parcel, U.S.P.S. or courier S S S S 37.9 S 41.1 S S 41.7 29.8 20.6
Other multiple modes S S S S S S S S S 31.6 31.6 0.1
Other and unknown modes 44.1 47.1 26.1 S S S 46.5 S S S S S

Division 4.1, Flammable solids

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 30.0 10.8 51.5 9.7 24.3 23.8 16.8 40.8 16.3 43.3 14.4 13.3
Single modes 32.6 12.2 52.1 9.7 24.6 24.2 16.9 41.5 16.7 S 15.3 S
Truck 38.9 15.0 62.6 7.1 4.9 11.7 24.7 18.9 32.8 S 19.5 S
For-hire truck 21.6 20.6 9.9 12.3 8.6 17.7 32.9 23.3 38.6 28.1 10.7 20.5
Private truck 46.1 22.5 177.2 21.7 25.4 89.8 18.7 30.8 62.1 S 28.2 S
Rail S 41.3 S 26.5 40.6 23.0 20.4 43.8 13.1 14.8 18.8 14.8
Water 44.1 S S 49.9 S S S S S 30.1 31.6 108.4
Air (includes truck and air) S S S S S S S S S 25.4 26.8 51.8
Pipeline S S S S 46.4 S S S S S S S
Multiple modes S S S S S S S S S 44.0 13.9 46.8
Parcel, U.S.P.S. or courier 39.7 S S 46.8 42.8 8.4 48.5 47.5 9.9 20.7 13.7 21.7
Other multiple modes S S S S S S S S S 31.1 32.7 132.3
Other and unknown modes S S S S S S S S S S 37.4 S

Division 4.2, Spontaneously combustible materials

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 36.3 13.3 65.1 35.4 13.5 36.7 39.4 10.0 27.3 19.4 22.6 19.5
Single modes 37.7 13.5 64.5 35.6 13.7 36.8 39.8 9.9 26.9 23.9 37.5 21.7
Truck 39.6 20.6 116.2 43.3 25.2 55.2 S 18.3 S 24.4 39.1 27.8
For-hire truck S 20.0 S 45.6 29.4 77.5 S 19.2 S 19.0 26.0 18.4
Private truck 20.9 37.5 103.9 27.2 21.3 12.8 S 24.6 S 21.1 44.4 32.5
Rail 36.9 16.6 16.1 S 13.5 S 43.1 13.9 18.5 25.8 4.8 13.8
Water &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Air (includes truck and air) S S S S 45.3 S S 48.5 S 28.7 27.4 68.1
Pipeline &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 S S S S S S
Multiple modes 46.0 S S 33.3 S S S S S 23.8 36.4 36.4
Parcel, U.S.P.S. or courier 46.2 S S 33.8 S S S S S 23.8 35.6 41.2
Other multiple modes S S S S S S S S S 30.1 29.0 44.2
Other and unknown modes S S S S S S S S S S 31.1 S

Division 4.3, Dangerous when wet materials

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes S 24.7 S 42.8 S S S 23.8 S 17.6 15.5 18.1
Single modes S 23.1 S 45.2 S S S 23.4 S 21.5 10.7 25.7
Truck S 25.3 S 48 S S S 26.4 S 22.6 11.4 27.6
For-hire truck S 21 S S 22.4 S S 26.4 S 21.5 7.7 27.6
Private truck 41.1 47.3 40.2 36.4 S S S S S 37.0 24.7 14.7
Rail S 21.4 S S 40.9 S S 32.2 S 29.8 28.8 66.5
Water &#8211 S S &#8211 S S &#8211 S S &#8211 30.8 &#8211
Air (includes truck and air) S S S S S S S S S 28.0 29.7 75.4
Pipeline &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 S S S S S S
Multiple modes 46.0 S S S S S S S S 29.9 24.0 12.7
Parcel, U.S.P.S. or courier S S S S S S S S S 25.6 24.5 11.5
Other multiple modes S S S S S S S S S 27.3 27.6 29.3
Other and unknown modes S S S S S S S S S S 44.8 S

Division 5.1, Oxidizers

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 21.2 13.7 28.0 29.1 12.2 40.6 29.4 18.9 30.2 21.0 15.0 55.4
Single modes 21.8 14.0 28.7 29.1 12.1 40.2 30.0 19.0 29.5 17.3 16.0 49.3
Truck 25.3 14.5 37.3 37.0 14.2 61.9 47.2 19.3 77.8 19.3 16.3 56.2
For-hire truck 24.6 17.1 28.1 44.2 20.8 99.5 S 23.0 S 15.6 8.1 19.5
Private truck 40.5 13.8 77.7 32.2 12.8 36.9 21.5 16.1 19.4 19.4 20.4 34.4
Rail 41.0 40.2 37.9 24.2 21.2 24.5 22.1 26.1 15.7 16.8 11.4 14.6
Water &#8211 S S &#8211 S S &#8211 S S &#8211 S S
Air (includes truck and air) S S S 49.7 45.4 S S S S 31.3 30.9 57.9
Pipeline &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 S S S S S S
Multiple modes 41.5 39.7 137.1 S S S S S S 18.0 11.0 56.4
Parcel, U.S.P.S. or courier S S S S S S S 40.2 S 25.1 11.7 78.8
Other multiple modes 49.3 S S S S S S S S S 25.3 S
Other and unknown modes S 35.8 S S S S S S S S 44.2 S

Division 5.2, Organic peroxides

Hazard class and mode of transporation Value - CV Value - Std. error of percent change Tons - CV Tons - Std. error of percent change Ton-miles - CV Ton-miles - Std. error of percent change Average miles per shipment - CV Average miles per shipment - Std. error of percent change
2002 1997 2002 1997 2002 1997 2002 1997
All modes 49.4 23.8 142.1 S 19.9 S S 23.7 S 16.4 18.9 39.5
Single modes 49.7 24.5 146.6 S 20.0 S S 24.7 S 17.6 16.4 35.4
Truck S 24.5 S S 20.0 S S 24.7 S 17.7 21.3 46.3
For-hire truck S 24.9 S S 22.0 S S 22.7 S 16.0 12.6 22.1
Private truck S 43.4 S 44.1 41.2 31.3 49.5 S S 31.7 13.7 16.7
Rail S &#8211 S S &#8211 S S &#8211 S 30.1 &#8211 &#8211
Water &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 &#8211
Air (includes truck and air) S S S S S S S S S 31.6 31.6 15.2
Pipeline &#8211 &#8211 &#8211 &#8211 &#8211 &#8211 S S S S S S
Multiple modes S S S S S S S S S 29.5 46.9 99.4
Parcel, U.S.P.S. or courier S S S S S S S S S 29.5 41.3 93.4
Other multiple modes &#8211 S S &#8211 S S &#8211 S S &#8211 31.6 &#8211
Other and unknown modes S S S S S S S S S 31.6 26.8 S

KEY:
&#8211 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.