Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997

Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997

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

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All Commodities

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 8.5 5.3 13.4 5.1 7.4 10.2 6.6 13.8 14.1 8.0 10.8 12.7
Single modes 9.9 6.1 15.7 4.7 7.1 9.8 5.8 14.1 14.6 12.5 6.0 14.1
Truck 10.5 6.3 16.4 5.0 6.9 10.4 5.9 5.5 9.3 14.6 4.7 16.3
Rail 13.7 13.4 24.9 12.6 22.4 23.7 11.0 25.7 22.0 8.2 8.2 11.4
Water S 39.8 S 46.6 44.4 185.8 45.7 45.8 141.8 22.3 S S
Air (including truck and air) 16.3 15.2 41.4 12.0 19.6 32.6 16.7 18.1 24.6 7.2 10.0 10.3
Pipeline S 49.0 S S S S S S S S S S
Multiple modes 16.5 3.0 22.2 46.1 32.5 34.4 42.9 28.3 44.1 4.5 7.8 9.2
Parcel, USPS or courier 18.4 4.1 23.9 15.5 7.4 19.5 12.9 14.6 22.6 4.5 7.8 9.2
Truck and rail S S S S S S S S S 22.0 23.6 42.5
Other multiple modes S 35.9 S S 36.3 S S 33.9 S S S S
Other and unknown modes 15.0 9.2 23.1 S 32.8 S 34.3 S S S 27.8 S

SCTG 01-05, Agriculture products and fish

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 20.2 11.4 21.5 25.3 17.0 23.0 43.8 23.6 51.3 34.8 26.4 80.7
Single modes 18.0 11.9 19.8 29.0 16.3 25.9 48.3 20.4 81.2 44.7 26.3 90.6
Truck 18.4 11.9 20.5 25.4 15.6 24.9 44.5 19.5 90.8 44.5 26.3 90.4
Rail S 28.8 S S 37.4 S S 35.3 S 29.2 29.4 45.3
Water S S S S S S 28.4
Air (including truck and air) S S S S S S S S S 31.6 31.6 31.0
Pipeline S S S S S S
Multiple modes S S S 41.2 43.7 603.7 S S S 29.0 18.8 125.2
Parcel, USPS or courier S 44.3 S S 39.1 S S 40.2 S 27.4 22.6 137.2
Truck and rail S S S S 49.0 S S S S 40.2 32.8 25.7
Other multiple modes S S S S S S S S S S 31.6 S
Other and unknown modes S 46.9 S S S S S S S S 41.4 S

SCTG 06-09, Grains, alcohol, and tobacco products

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 33.9 23.9 54.1 13.8 9.2 18.1 16.4 13.3 26.5 24.8 12.6 66.4
Single modes 35.2 24.0 55.0 13.8 9.4 18.3 17.5 13.7 26.1 16.7 9.8 53.0
Truck 35.4 24.0 54.6 10.8 9.3 14.4 13.7 14.2 21.1 16.6 9.9 52.6
Rail 36.5 35.1 158.3 S 35.2 S S 38.0 S S 27.9 S
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S 25.3 19.0 24.2
Parcel, USPS or courier S 31.7 S S 27.4 S S 35.8 S 25.7 19.7 24.5
Truck and rail S S S S S S S S S 31.6 30.8 50.5
Other multiple modes S S S S S S 31.6
Other and unknown modes S 36.1 S S 42.4 S S S S S S S

SCTG 10-14, Stones, non-metallic minerals, and metallic ores

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 18.7 14.0 35.1 14.8 18.7 28.3 14.3 17.8 37.6 21.6 12.0 34.1
Single modes 19.1 13.7 35.8 14.7 18.8 28.6 14.3 18.2 38.1 15.0 12.3 23.9
Truck 20.5 13.9 35.4 15.9 18.6 29.1 12.7 18.5 30.4 12.6 11.4 19.9
Rail 48.1 29.1 148.5 37.9 38.3 54.1 39.4 28.9 126.7 27.8 S S
Water S S S S S S 27.9
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S 28.8 31.6 444.2
Parcel, USPS or courier S S S S S S S S S 28.6 31.6 385.2
Truck and rail
Other multiple modes S S S S S S 31.9
Other and unknown modes S 47.7 S 38.2 S S S S S S 32.5 S

SCTG 15-19, Coal and petroleum products

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 12.2 13.7 22.2 14.3 16.3 20.4 17.8 26.9 21.0 19.7 44.8 27.7
Single modes 9.6 14.2 20.4 14.0 16.5 21.1 15.6 27.4 21.0 19.1 44.1 26.4
Truck 10.3 14.8 22.8 22.2 18.1 31.5 16.7 45.0 29.6 19.2 45.5 26.7
Rail 17.5 22.6 26.2 15.7 25.5 26.1 15.8 28.0 21.6 5.9 2.5 5.3
Water S S S S S S 31.6
Air (including truck and air)
Pipeline S S S S S S S S S S
Multiple modes S 34.8 S S 36.4 S S 34.9 S 41.5 S S
Parcel, USPS or courier 42.3 32.9 109.5 47.4 34.6 593.6 42.5 35.9 217.5 41.4 S S
Truck and rail
Other multiple modes S 35.2 S S 36.4 S S 34.9 S 31.6 21.4 47.3
Other and unknown modes 43.5 S S S S S S S S S S S

SCTG 20-24, Pharmaceutical and chemical products

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 14.4 12.1 23.1 20.7 17.3 30.0 18.8 15.7 43.3 17.3 19.1 31.5
Single modes 15.3 12.4 26.1 21.1 17.3 31.0 19.1 13.9 45.5 28.3 26.2 63.2
Truck 15.5 12.5 26.4 20.7 18.4 27.8 12.1 14.5 26.6 28.8 26.9 65.7
Rail 31.8 38.8 156.5 39.5 48.1 525.8 47.2 44.6 687.1 22.8 19.8 42.9
Water S S S S S S S S S 31.6 32.0 36.9
Air (including truck and air) 48.3 27.2 44.2 S 37.1 S S S S 17.4 11.5 19.2
Pipeline S S S S S S S S S S
Multiple modes 30.2 27.0 19.6 25.4 S S 27.9 S S 9.5 10.9 20.0
Parcel, USPS or courier 32.3 27.9 21.1 34.8 19.2 23.9 46.6 33.0 46.8 9.5 10.9 20.0
Truck and rail 40.7 S S 36.5 S S 36.3 S S 23.6 46.8 167.0
Other multiple modes S S S S S S 33.4
Other and unknown modes 43.8 18.5 26.2 S 17.7 S 49.5 38.3 30.2 S S S

SCTG 25-30, Logs, wood products, and textile and leather

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 11.1 3.0 12.0 31.3 7.6 51.9 11.5 4.0 12.7 12.4 8.4 15.9
Single modes 6.5 3.1 6.7 31.6 7.8 52.7 11.7 4.0 12.9 20.5 13.1 15.6
Truck 6.4 3.3 6.7 32.6 8.4 55.6 13.2 4.7 14.3 21.1 12.1 20.0
Rail 23.6 19.3 43.7 19.6 18.1 27.7 25.2 18.1 38.3 11.9 11.6 20.0
Water S S S S S S S S S 31.6 31.6 0.1
Air (including truck and air) 27.8 20.2 23.1 28.5 35.3 89.1 36.3 47.5 77.6 13.2 15.1 12.0
Pipeline S S S S S S S S S S
Multiple modes 40.3 14.6 76.5 17.8 19.6 27.3 15.3 44.2 39.1 9.3 7.9 13.8
Parcel, USPS or courier 40.5 15.3 78.1 19.2 12.2 27.8 20.6 15.3 34.3 9.3 7.9 13.9
Truck and rail 39.6 S S 39.5 S S 45.8 S S 27.1 29.4 39.0
Other multiple modes S S S S S S S S S 31.6 31.6 S
Other and unknown modes 32.6 27.9 143.8 22.4 19.0 25.2 30.9 23.7 21.6 S 13.2 S

SCTG 31-34, Base metal and machinery

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 7.0 5.8 12.1 27.9 13.2 42.5 24.3 5.8 36.8 22.4 12.4 29.2
Single modes 7.9 6.9 14.3 28.0 13.4 42.9 23.1 5.9 34.7 34.9 14.8 50.9
Truck 8.6 7.4 15.2 29.6 14.1 42.7 23.0 7.8 30.4 25.6 14.2 38.1
Rail S 30.9 S 30.4 22.6 157.4 46.5 28.0 189.3 S 24.2 S
Water S 44.1 S S 43.4 S S S S 30.7 27.7 25.9
Air (including truck and air) 45.1 29.6 77.5 38.5 16.2 65.1 36.2 24.9 43.2 10.4 11.3 16.7
Pipeline S S S S S S S S S S S S
Multiple modes 18.6 17.0 27.5 49.3 14.3 122.4 S 28.7 S 17.2 10.5 22.8
Parcel, USPS or courier 19.5 17.2 28.0 23.4 14.1 29.4 19.1 13.5 26.1 17.4 10.6 23.0
Truck and rail S S S S S S S S S 43.7 31.6 108.5
Other multiple modes S 47.2 S S S S S 48.9 S 31.7 23.8 0.4
Other and unknown modes 34.5 17.7 37.6 29.1 25.6 19.0 S 25.7 S S 14.7 S

SCTG 35-38, Electronic, motorized vehicles, and precision instruments

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 13.9 6.9 23.7 26.9 11.8 49.5 29.8 12.2 44.9 16.0 7.2 23.6
Single modes 18.8 11.7 36.2 29.5 12.0 55.1 31.2 12.8 48.5 27.6 17.6 51.8
Truck 22.0 11.4 39.3 29.6 12.0 55.4 31.5 12.9 49.1 S 16.5 S
Rail S S S S S S S S S 29.8 S S
Water S S S S S S 31.6
Air (including truck and air) 21.2 21.0 64.8 28.1 45.1 37.8 28.7 33.6 35.6 12.3 4.8 14.4
Pipeline S S S S S S S S S S
Multiple modes 19.8 9.1 27.7 26.4 10.0 32.8 22.1 18.2 30.5 9.7 5.1 12.3
Parcel, USPS or courier 19.8 9.3 28.0 26.1 11.5 37.4 20.9 24.8 47.4 9.7 5.1 12.3
Truck and rail S 36.6 S S 49.4 S S 46.0 S 29.8 26.5 77.1
Other multiple modes S S S S S S 31.6
Other and unknown modes 29.6 15.4 47.5 43.2 22.0 65.9 45.6 22.8 18.8 S 12.0 S

SCTG 39-43, Furniture, mixed freight and misc manufactured products

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 31.7 8.1 71.4 27.2 18.4 44.2 16.4 12.6 18.4 16.7 13.1 9.6
Single modes 35.6 8.4 85.7 30.0 18.3 41.3 17.9 13.3 19.5 18.8 15.0 13.7
Truck 35.7 8.4 87.4 30.1 20.6 47.7 18.4 14.4 24.4 19.6 16.8 18.2
Rail S 31.8 S S 29.4 S S 26.8 S S 24.1 S
Water
Air (including truck and air) 29.2 S S S S S S 46.6 S 22.4 13.5 15.3
Pipeline S S S S S S S S S S
Multiple modes 19.1 21.2 36.8 21.8 27.2 34.4 39.5 31.6 58.7 12.8 9.9 12.3
Parcel, USPS or courier 19.1 21.1 37.0 22.4 25.3 34.0 16.4 32.0 29.4 12.8 9.9 12.3
Truck and rail S S S S S S S S S 31.6 29.8 88.6
Other multiple modes S S S S S S S S
Other and unknown modes S 21.1 S S S S S 29.4 S S S S

Commodity Unknown

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 23.3 S S 29.8 S S 49.9 S S S 22.7 S
Single modes 26.5 S S 30.3 S S S S S S S S
Truck 26.5 S S 30.3 S S S S S S 23.3 S
Rail S S S S S S 30.4
Water
Air (including truck and air) S S S S S S S S S 31.6 27.1 14.1
Pipeline S S S S S S
Multiple modes S S S S S S S S S 39.6 29.9 95.5
Parcel, USPS or courier S S S S S S S S S 39.6 29.9 95.5
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S S S S S

KEY:
– Represents data cell equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of high sampling variability or poor response quality.
CV Coefficient of variation of number

NOTE: The Introduction and appendixes give information onf 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, Individual State Data, December 2004.