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 8.9 6.1 13.8 9.6 6.3 12.4 18.0 8.1 24.7 10.0 7.6 13.1
Single modes 10.3 5.1 15.1 10.3 6.2 13.1 18.3 9.0 25.3 14.3 5.5 17.2
Truck 8.5 5.9 13.2 6.4 6.3 8.8 9.3 3.2 11.5 15.4 6.9 20.1
Rail 43.2 13.8 83.3 44.1 20.4 71.9 38.1 23.6 54.9 13.4 20.8 37.0
Water 32.8 26.9 37.0 31.4 24.9 101.5 39.1 29.5 97.5 33.6 19.7 12.1
Air (including truck and air) 11.8 12.1 14.5 28.8 13.2 19.8 29.3 14.6 32.7 5.7 5.8 9.2
Pipeline 21.2 21.8 49.2 23.3 15.7 45.5 S S S S S S
Multiple modes 9.1 11.6 16.3 33.6 21.8 29.2 37.0 15.3 49.5 6.2 5.6 9.0
Parcel, USPS or courier 10.7 15.2 23.3 10.1 18.7 26.0 11.4 28.4 40.8 6.2 5.7 9.0
Truck and rail 32.1 21.1 20.1 38.8 11.6 33.9 42.5 10.3 47.9 10.8 7.9 16.3
Other multiple modes 43.5 31.3 10.6 S 31.7 S S 37.6 S S S S
Other and unknown modes 26.2 15.6 41.8 29.0 24.5 34.8 42.4 18.0 67.0 18.5 27.0 61.6

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 27.4 7.8 24.3 40.5 16.6 44.4 S 29.7 S 27.9 21.5 83.8
Single modes 27.6 7.8 24.8 41.3 16.7 45.5 S 30.2 S 27.6 15.2 104.1
Truck 30.6 6.8 25.7 37.8 10.4 29.0 29.4 17.6 41.1 28.6 15.0 114.1
Rail S 22.6 S S 32.5 S S 39.6 S 17.7 6.7 21.6
Water 35.2 43.6 42.4 39.6 43.7 69.7 48.3 43.4 112.5 25.8 21.3 35.1
Air (including truck and air) S S S S S S 26.2
Pipeline S S S S S S
Multiple modes S 46.1 S S 48.1 S S S S S 19.4 S
Parcel, USPS or courier S 45.8 S S 44.2 S S 45.1 S S 19.3 S
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S 32.8
Other and unknown modes S 32.7 S S 35.8 S S S S S S 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 7.9 6.5 11.4 11.4 6.6 14.3 25.2 8.2 40.4 S 10.0 S
Single modes 7.6 6.3 11.2 10.7 6.0 13.5 16.9 8.4 27.0 S 5.8 S
Truck 7.7 6.5 11.4 10.7 7.1 14.3 17.6 9.1 30.1 S 5.9 S
Rail 23.8 19.3 33.3 26.3 24.2 33.4 29.4 26.7 45.1 22.3 7.1 35.2
Water
Air (including truck and air) S 49.4 S S 47.2 S S S S 31.6 27.3 50.5
Pipeline S S S S S S S S S S
Multiple modes S 19.5 S S 20.9 S S 29.8 S 15.4 S S
Parcel, USPS or courier S 44.4 S 30.9 S S 27.7 27.5 50.6 20.0 S S
Truck and rail S 22.3 S S 26.3 S S 30.6 S 27.9 15.9 37.3
Other multiple modes
Other and unknown modes 47.3 33.6 3.8 S 44.1 S S 35.7 S 34.0 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 45.9 14.9 64.8 15.2 13.8 19.2 21.4 22.7 20.5 16.3 25.0 24.9
Single modes 46.3 15.2 63.8 15.7 14.1 18.5 21.6 22.8 20.0 17.8 26.1 25.3
Truck S 15.5 S 16.8 13.8 17.4 17.5 24.5 13.6 18.3 27.2 26.4
Rail S S S S S S S S S 30.5 26.8 39.0
Water S S S 40.6 S S S S S 23.7 31.0 16.3
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S S S S 47.1 S S S S 34.5 21.2 38.4
Parcel, USPS or courier S S S S 47.1 S S S S 34.5 21.2 38.4
Truck and rail
Other multiple modes
Other and unknown modes 45.1 S S 39.1 S S 37.5 48.0 318.9 18.4 S 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 13.3 8.8 20.4 13.4 12.1 17.5 26.3 13.4 45.5 S 22.4 S
Single modes 13.9 10.8 24.3 13.9 11.4 20.5 26.4 16.5 53.3 S 14.1 S
Truck 22.3 14.2 33.4 22.4 14.8 22.7 44.2 20.2 67.6 S 14.0 S
Rail 49.5 40.3 66.7 S 28.8 S 35.9 20.9 46.0 18.2 14.5 26.5
Water 47.2 S S 46.6 44.5 133.9 42.7 44.4 135.2 22.8 25.9 37.0
Air (including truck and air) S S S S S S S S S 31.6 40.2 126.2
Pipeline 21.3 23.7 54.5 23.9 16.5 52.3 S S S S S S
Multiple modes S 29.3 S S 32.0 S S 37.5 S 31.8 28.9 91.7
Parcel, USPS or courier S S S S S S S S S 32.3 20.3 61.2
Truck and rail S S S S S S S S S 31.6 31.6 195.4
Other multiple modes S 32.3 S S 32.0 S S 37.6 S 36.9 S S
Other and unknown modes 40.6 25.0 17.2 40.4 41.2 3.3 40.6 S S 31.1 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 7.0 6.0 10.8 23.4 29.2 44.6 20.9 20.1 42.2 8.0 11.0 14.7
Single modes 4.5 5.4 8.0 26.9 28.0 44.0 22.2 20.5 40.8 19.2 10.2 24.1
Truck 4.8 4.7 7.6 30.5 22.8 45.3 27.5 10.9 42.9 19.2 8.1 23.5
Rail 27.6 36.3 42.6 49.8 S S 33.3 S S 23.7 S S
Water S S S S S S 31.6
Air (including truck and air) 45.6 17.5 141.2 27.6 25.7 29.7 36.3 37.9 24.6 13.1 8.3 13.1
Pipeline S S S S S S S S S S S S
Multiple modes 33.5 17.8 52.9 21.7 14.5 20.5 30.2 18.5 24.6 11.9 9.6 14.7
Parcel, USPS or courier 35.2 18.0 57.6 32.5 16.3 50.8 35.7 12.0 84.2 11.9 9.6 14.8
Truck and rail S 28.8 S 38.1 20.3 23.5 42.3 20.2 26.1 21.6 5.2 23.2
Other multiple modes S S S S S S S S S 32.2 36.4 88.7
Other and unknown modes 33.2 23.1 46.5 S S S S S S 25.5 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 12.2 11.9 25.4 15.6 11.7 21.3 14.4 13.0 19.1 10.4 7.9 16.4
Single modes 10.7 13.9 24.8 12.8 11.9 18.0 14.1 13.7 19.5 25.8 10.1 46.7
Truck 10.7 13.8 25.0 13.0 12.1 18.2 15.0 13.9 20.3 27.2 11.7 55.1
Rail 17.9 S S 26.3 S S 26.3 S S 17.4 28.9 51.0
Water S S S S S S S S S 31.6 31.6 37.3
Air (including truck and air) 37.0 46.6 9.8 S 34.8 S S 42.7 S 17.8 13.5 27.3
Pipeline S S S S S S
Multiple modes 14.7 10.5 24.8 17.6 9.0 14.8 20.0 14.5 12.2 10.7 5.2 13.7
Parcel, USPS or courier 14.9 10.2 27.9 15.5 12.2 20.1 18.4 12.3 25.6 10.7 5.2 13.8
Truck and rail S 32.5 S S 24.9 S 47.9 21.7 10.1 25.6 7.6 15.6
Other multiple modes S S S S S S 32.9
Other and unknown modes 42.9 42.5 175.0 S 14.9 S S 23.7 S 27.0 S 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 7.3 6.6 9.5 14.3 6.9 16.4 21.4 5.6 20.1 6.7 15.9 13.1
Single modes 9.0 3.1 9.6 14.4 7.1 16.8 20.4 5.1 19.7 9.0 15.3 19.3
Truck 8.9 3.2 9.5 14.9 8.1 17.9 14.7 5.0 14.8 8.6 16.9 20.2
Rail 27.1 21.4 36.5 37.6 13.6 38.2 S 16.0 S 11.8 S S
Water S S S S S S 34.4
Air (including truck and air) 27.9 15.9 38.2 42.8 24.5 34.0 44.2 29.2 66.6 8.1 9.2 15.4
Pipeline S S S S S S
Multiple modes 19.9 36.6 28.0 27.1 38.2 27.2 49.7 37.6 36.2 6.0 12.3 10.2
Parcel, USPS or courier 21.8 41.2 33.8 36.6 46.1 55.9 31.1 S S 5.6 12.3 10.2
Truck and rail 49.9 27.7 15.7 S 30.8 S S 36.5 S 22.6 15.1 46.9
Other multiple modes S S S S S S S S S 29.3 33.5 54.8
Other and unknown modes 15.8 8.9 15.7 46.5 12.2 32.1 S 17.0 S S S 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 23.5 15.2 45.4 25.8 9.0 54.6 30.7 10.0 67.5 20.5 6.7 18.4
Single modes 27.4 16.5 54.3 27.7 8.6 59.7 33.4 11.0 77.6 33.0 7.0 30.9
Truck 21.9 17.6 44.8 22.1 9.6 47.8 23.8 9.4 54.1 37.1 7.2 41.1
Rail S 20.5 S S 20.3 S S 27.1 S 14.4 11.6 18.3
Water S S S S S S 31.6
Air (including truck and air) 22.3 13.5 22.9 18.2 24.7 11.8 16.4 16.7 11.5 8.7 11.7 17.9
Pipeline S S S S S S
Multiple modes 16.7 10.3 22.6 24.6 24.4 35.4 26.6 24.4 43.2 9.5 6.7 13.9
Parcel, USPS or courier 15.5 5.2 24.2 19.1 11.7 35.4 23.5 9.9 54.5 9.5 6.9 14.0
Truck and rail 44.3 31.7 26.7 35.1 32.5 37.5 33.5 29.5 46.1 19.8 17.7 28.9
Other multiple modes S S S S S S S S S S 36.3 S
Other and unknown modes 42.2 34.3 91.9 42.1 38.5 103.3 37.8 26.9 39.2 S 14.6 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 8.6 9.5 21.0 39.9 9.5 84.9 22.8 11.4 41.1 12.1 7.0 14.9
Single modes 9.5 10.7 24.3 40.4 9.8 87.3 24.2 11.0 40.3 29.1 12.8 15.9
Truck 9.0 11.2 24.4 18.0 9.7 33.4 13.1 11.0 23.8 31.1 15.5 20.0
Rail S 18.0 S S 24.9 S S 28.5 S S 31.7 S
Water
Air (including truck and air) 45.4 S S S 47.4 S S 45.6 S 17.9 15.6 20.4
Pipeline S S S S S S S S S S
Multiple modes 16.2 15.5 34.3 22.4 27.7 27.8 25.0 38.5 37.6 5.9 5.5 10.8
Parcel, USPS or courier 16.2 16.3 35.4 23.5 14.2 42.1 26.8 14.9 63.3 5.9 5.5 10.8
Truck and rail S 37.8 S 43.5 S S 47.6 S S S 16.7 S
Other multiple modes S S S S S S 31.6
Other and unknown modes 16.2 17.5 11.7 S 32.7 S S 26.4 S S 43.0 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 20.2 27.6 12.1 37.2 34.3 13.1 47.7 17.1 118.4 27.8 19.1 29.9
Single modes 26.7 31.0 10.2 39.1 34.5 13.1 48.9 18.0 125.3 47.0 25.9 34.8
Truck 33.3 22.2 11.5 27.6 30.9 8.8 S 15.0 S S 21.7 S
Rail S S S S S S S S S 28.1 S S
Water S S S S S S 29.8
Air (including truck and air) S S S S S S S S S 40.6 30.5 28.9
Pipeline S S S S S S S S S S
Multiple modes S 35.3 S S 36.0 S S 46.9 S 28.2 19.4 34.0
Parcel, USPS or courier S 37.2 S S 35.3 S S 38.1 S 28.2 19.4 34.0
Truck and rail S S S S S S 31.2
Other multiple modes S S S S S S 31.6
Other and unknown modes S S S S 45.2 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.