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 19.6 10.5 26.8 23.8 9.4 33.1 9.2 5.8 10.2 12.0 16.4 14.6
Single modes 23.2 13.3 34.6 25.9 7.9 39.0 10.8 6.5 12.2 22.9 16.0 29.3
Truck 7.7 2.8 10.7 36.8 10.1 54.1 8.5 3.7 10.0 10.6 16.0 16.6
Rail 17.9 10.1 22.2 25.9 20.8 67.3 25.6 13.1 27.6 8.3 7.9 12.7
Water 40.9 17.7 26.1 S 25.4 S 47.1 23.7 24.8 16.7 10.5 17.8
Air (including truck and air) S 38.7 S 37.3 23.5 88.7 S 23.2 S 4.8 3.1 6.8
Pipeline 9.0 31.9 48.6 11.7 33.2 53.8 S S S S S S
Multiple modes 17.7 15.5 22.7 16.3 18.3 16.4 18.8 10.8 21.4 9.9 10.4 11.0
Parcel, USPS or courier 18.3 17.4 25.2 19.7 11.5 27.4 26.6 19.9 34.4 10.2 10.5 11.1
Truck and rail 31.6 13.3 21.2 23.5 24.3 25.0 22.3 18.5 27.1 4.7 9.2 10.2
Other multiple modes 27.6 16.3 23.9 32.3 39.8 23.1 36.0 17.4 41.7 5.9 7.9 12.5
Other and unknown modes 27.8 14.7 15.4 27.1 30.5 21.1 17.8 S S S S 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 19.0 7.6 15.0 29.4 22.4 27.3 30.6 15.6 24.2 S S S
Single modes 19.6 5.4 19.2 30.3 20.1 48.4 31.3 17.9 27.9 S S S
Truck 17.8 10.4 18.1 25.3 15.0 44.0 29.8 14.9 38.5 S S S
Rail 45.6 23.2 368.1 44.9 28.2 612.7 S 37.9 S 25.8 24.4 67.9
Water S 27.6 S S 35.8 S 37.6 35.8 10.4 42.7 38.5 95.0
Air (including truck and air) S 45.4 S S S S S S S S 17.2 S
Pipeline S S S S S S
Multiple modes S 40.1 S 46.0 S S S S S 28.7 15.2 31.0
Parcel, USPS or courier S S S S S S S S S 28.0 19.6 27.9
Truck and rail S S S S S S S 40.0 S 31.6 21.3 49.4
Other multiple modes S S S S S S S S S 25.8 23.6 77.6
Other and unknown modes S 28.0 S 47.7 35.8 2.3 S 43.3 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 17.3 8.1 19.1 21.4 8.7 24.4 30.0 11.7 31.7 29.6 11.6 50.2
Single modes 18.1 8.3 20.0 22.0 8.9 25.5 30.5 12.0 33.6 29.8 15.6 59.3
Truck 18.5 8.7 20.4 17.6 8.4 19.3 25.3 9.0 25.0 30.8 17.3 62.6
Rail S 26.7 S S 30.6 S S 28.9 S 27.9 13.5 18.6
Water S 48.5 S S 41.5 S S S S 28.2 22.9 43.0
Air (including truck and air) S S S S S S S S S 28.9 29.8 55.3
Pipeline S S S S S S
Multiple modes 38.6 27.1 25.9 19.3 29.0 12.3 21.6 30.1 13.9 20.6 44.4 88.1
Parcel, USPS or courier S S S 49.1 46.2 28.0 S S S 22.5 49.5 107.6
Truck and rail 46.6 S S 43.1 S S 43.5 S S 21.2 29.3 49.3
Other multiple modes 48.3 29.9 7.5 34.9 34.9 12.3 34.3 34.8 12.2 22.5 13.3 30.7
Other and unknown modes S 22.6 S S 23.8 S 49.4 25.8 7.7 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 38.5 31.5 138.4 S 25.6 S 48.4 25.1 217.7 S 18.3 S
Single modes 39.2 31.8 133.7 S 25.7 S S 25.9 S S 17.3 S
Truck 41.0 32.8 137.5 S 27.8 S S 24.2 S S 17.5 S
Rail 42.4 44.8 60.0 36.6 42.7 17.8 41.1 44.7 15.9 30.0 26.6 22.5
Water S S S S S S S S S 27.9 25.9 112.9
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S 49.2 S S S S S S S 34.7 31.1 58.9
Parcel, USPS or courier S S S S S S S S S 31.6 30.2 36.9
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S S S S 30.8 26.7 34.3
Other and unknown modes S 26.8 S 38.0 44.2 493.4 46.5 S S 31.8 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 14.5 15.4 30.7 14.4 16.4 30.3 17.2 28.8 28.6 48.4 39.5 66.0
Single modes 13.5 15.4 29.6 11.2 18.7 29.8 17.5 28.5 28.5 S 31.4 S
Truck 20.1 9.6 31.3 15.8 13.9 26.1 17.9 13.2 44.2 32.8 16.0 43.9
Rail 48.9 41.5 133.7 S 44.9 S S S S 25.5 30.0 28.0
Water 46.4 32.6 37.8 41.6 34.1 24.7 S 38.5 S 37.3 36.8 20.7
Air (including truck and air) S S S S S S 29.9
Pipeline 9.0 37.7 66.9 11.7 38.8 71.7 S S S S S S
Multiple modes S 42.5 S S 48.2 S S S S 33.0 38.6 2.1
Parcel, USPS or courier S 42.5 S S 48.2 S S S S 31.6 38.6 2.0
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S 33.1 S S 45.9 S 43.6 S S S 47.9 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 12.8 8.2 12.3 35.9 12.3 20.3 21.6 18.0 6.7 27.7 17.0 84.9
Single modes 24.4 8.4 16.4 36.8 12.4 20.7 19.5 18.8 5.8 35.4 18.9 91.1
Truck 25.0 8.2 18.8 42.1 12.6 30.6 28.0 9.9 17.3 32.0 14.9 18.4
Rail 24.5 12.3 4.9 32.9 31.0 9.4 35.3 24.2 5.6 34.5 13.3 20.8
Water S S S S S S 20.6
Air (including truck and air) 39.9 S S S S S S S S 15.9 3.9 22.2
Pipeline 42.5 43.7 S S S S S S
Multiple modes 32.6 21.2 65.3 48.9 24.1 47.6 S 32.6 S 24.3 22.1 79.4
Parcel, USPS or courier 32.9 23.0 71.7 S 33.4 S S 24.4 S 24.5 22.9 82.6
Truck and rail 43.5 41.1 21.4 42.3 41.1 33.8 44.8 40.7 29.5 26.3 15.2 25.4
Other multiple modes S 30.6 S S 49.8 S S S S 28.7 10.9 42.8
Other and unknown modes 38.9 30.7 15.3 S S S S S S 43.4 44.1 110.5

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 7.9 7.7 10.5 17.3 9.0 23.5 22.9 11.0 29.9 18.7 10.4 19.0
Single modes 8.7 8.9 11.9 17.8 11.5 27.3 25.4 8.8 37.6 29.2 14.8 25.7
Truck 9.8 11.0 14.3 14.7 8.9 20.9 14.3 9.3 20.9 33.1 18.8 28.9
Rail 10.2 10.7 12.4 33.2 33.6 61.9 35.7 16.6 60.8 9.8 11.7 19.4
Water S 33.2 S S 39.0 S S S S 28.0 14.5 22.3
Air (including truck and air) 44.8 22.7 20.7 S 48.1 S S S S 15.0 8.0 23.9
Pipeline S S S S S S
Multiple modes 20.3 13.1 22.0 37.3 28.8 22.5 42.6 21.6 34.2 13.0 10.5 14.7
Parcel, USPS or courier 25.6 13.9 31.2 24.5 20.9 23.7 23.4 28.3 18.0 13.1 10.6 14.8
Truck and rail 33.0 22.1 18.8 26.3 34.2 13.3 24.2 26.0 15.6 5.3 11.4 14.2
Other multiple modes 36.7 36.3 44.5 S 34.1 S S 32.3 S 8.2 9.6 15.8
Other and unknown modes 23.7 21.3 32.1 39.4 46.4 58.4 33.9 S S S 30.2 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 22.5 4.0 21.9 21.4 10.3 8.1 18.8 9.4 12.4 19.0 20.9 28.3
Single modes 25.5 6.0 25.7 22.6 10.7 8.4 21.8 8.9 13.9 17.0 16.6 25.2
Truck 26.4 7.7 29.8 23.8 12.9 9.5 11.2 11.6 14.8 17.5 17.7 25.8
Rail S 13.6 S S 24.4 S S 17.3 S 26.8 16.0 39.0
Water S 33.6 S S 28.6 S S 43.4 S 28.0 15.4 28.7
Air (including truck and air) 39.2 27.5 27.4 S 31.2 S S 30.8 S 13.1 4.6 13.9
Pipeline S S S S S S
Multiple modes 31.0 18.0 28.1 23.5 20.6 12.1 34.2 27.6 19.7 21.2 19.8 24.0
Parcel, USPS or courier 32.8 22.9 38.1 S 17.5 S 44.5 14.7 59.4 21.2 20.1 24.2
Truck and rail 46.3 24.6 8.4 S 23.0 S S 23.8 S 25.7 15.9 36.4
Other multiple modes S 23.9 S S 33.0 S S 42.3 S 24.7 15.5 35.5
Other and unknown modes 29.2 17.8 29.8 44.0 32.6 34.9 S 36.9 S S 20.4 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 43.6 27.3 66.8 14.9 11.0 22.8 22.0 22.5 29.3 37.9 20.3 37.0
Single modes S 32.5 S 18.1 10.2 29.4 28.1 21.3 38.7 S 27.6 S
Truck 14.4 9.7 23.6 22.8 10.1 32.3 23.7 19.5 29.5 S 26.9 S
Rail S S S S S S S S S 31.6 28.3 34.6
Water S S S S S S S S S 40.6 34.5 76.7
Air (including truck and air) S 39.7 S 49.7 34.9 198.4 S 17.4 S 6.3 5.3 9.3
Pipeline S S S S S S S S S S
Multiple modes 27.3 28.0 44.0 34.7 18.4 45.6 26.9 36.4 43.1 12.7 14.5 17.5
Parcel, USPS or courier 27.5 28.8 45.6 37.8 21.4 54.7 35.7 45.8 59.3 13.0 14.5 17.5
Truck and rail 40.3 S S 35.7 48.6 27.7 35.4 45.5 34.8 21.4 19.5 28.4
Other multiple modes 35.9 S S 29.1 S S 26.3 S S 17.8 S S
Other and unknown modes S 23.8 S 36.2 23.1 18.8 43.7 30.5 24.3 48.8 S 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 25.4 18.9 67.2 23.3 28.4 45.1 22.1 12.6 42.6 17.7 15.8 12.2
Single modes 30.4 8.8 104.7 23.8 29.0 41.9 16.3 15.4 20.4 9.9 17.9 9.5
Truck 30.7 9.4 108.3 23.8 30.1 47.0 14.9 17.1 20.6 9.7 21.6 14.4
Rail S 20.9 S S 23.1 S S 37.6 S 28.8 S S
Water S S S S S S S S S 28.5 S S
Air (including truck and air) S S S S S S S S S 11.8 8.2 13.3
Pipeline S S S S S S
Multiple modes 25.5 35.3 30.5 32.9 23.0 209.9 34.2 22.3 217.7 14.2 10.8 13.1
Parcel, USPS or courier 29.4 35.7 29.4 40.3 34.8 68.3 S 36.8 S 14.5 10.8 13.2
Truck and rail S 26.8 S 42.9 26.5 S 43.2 26.3 833.3 23.8 11.0 19.7
Other multiple modes 35.4 29.9 95.0 35.3 30.2 64.3 34.0 31.3 74.5 16.9 33.0 76.3
Other and unknown modes S 19.0 S S 45.9 S 45.7 46.0 213.7 S 21.0 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 44.8 41.0 18.7 40.7 S S S 47.2 S 40.7 40.5 71.9
Single modes 48.2 S S 40.5 S S S 46.3 S S 27.9 S
Truck 49.2 S S 43.4 S S S S S S 15.9 S
Rail S S S 40.9 S S S S S 33.3 43.8 65.6
Water S S S S S S 31.0
Air (including truck and air) 44.8 S S 48.5 19.9
Pipeline S S S S S S S S S S
Multiple modes 32.8 S S 43.8 S S S S S 19.7 22.8 37.5
Parcel, USPS or courier 32.8 S S 43.8 S S S S S 19.7 23.5 38.7
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S 28.0
Other and unknown modes S S S S S S S S S 32.2 31.2 23.7

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.