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 3.4 2.0 5.0 10.5 13.3 18.1 3.1 3.7 5.6 8.2 6.1 10.3
Single modes 3.6 2.7 5.5 11.2 13.8 19.0 4.0 3.4 6.0 12.0 7.1 15.7
Truck 4.1 2.5 6.1 17.4 18.5 26.7 8.7 5.0 12.5 13.4 9.6 20.7
Rail 17.0 16.6 19.3 20.5 9.8 25.9 21.6 7.5 23.2 19.3 4.9 12.2
Water 10.7 6.6 10.3 21.1 12.6 29.5 11.7 8.0 15.9 13.0 S S
Air (including truck and air) 20.1 14.5 18.6 18.6 14.0 15.9 27.2 18.7 30.2 7.0 2.2 8.0
Pipeline 17.4 29.5 37.5 18.2 29.1 34.2 S S S S S S
Multiple modes 14.3 5.0 20.3 22.9 15.4 40.1 23.2 13.7 41.0 7.1 3.0 7.5
Parcel, USPS or courier 14.2 5.3 20.5 31.7 8.1 49.2 11.3 9.5 17.8 7.1 3.0 7.5
Truck and rail 37.1 25.7 51.0 46.5 11.1 95.3 17.8 12.1 22.9 13.7 5.3 12.0
Other multiple modes 27.1 16.8 100.5 28.9 22.2 45.9 37.2 22.6 82.2 44.6 26.6 54.7
Other and unknown modes 16.2 10.7 23.8 27.6 48.7 42.6 23.3 22.7 15.7 48.3 25.9 51.5

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 18.5 4.1 14.0 14.8 9.5 15.0 3.9 5.6 6.7 26.3 18.5 25.9
Single modes 19.8 4.5 14.7 18.3 9.5 16.3 12.1 6.1 11.0 28.0 24.9 55.9
Truck 24.6 6.7 19.7 24.4 15.1 21.8 22.9 10.5 18.4 23.9 25.0 48.3
Rail S 15.4 S S 30.9 S 34.7 16.9 11.8 25.9 15.1 22.7
Water 15.7 8.1 11.3 14.9 9.8 15.5 14.6 9.4 15.8 1.8 1.3 2.3
Air (including truck and air) S 36.1 S S S S S S S 31.6 23.7 77.8
Pipeline S S S S S S
Multiple modes 26.3 38.2 169.8 35.9 47.1 697.7 35.4 42.5 705.6 14.0 S S
Parcel, USPS or courier S S S 48.8 S S S S S 19.2 44.9 123.6
Truck and rail S S S S 37.8 S S 37.2 S 28.2 21.2 26.5
Other multiple modes 39.2 46.4 343.1 37.1 S S 37.1 49.1 857.1 22.9 23.8 60.7
Other and unknown modes S 22.1 S 39.4 41.4 5.8 36.4 38.7 7.8 40.9 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 13.7 5.2 14.8 11.6 7.5 16.1 9.2 10.7 15.1 42.5 23.1 22.3
Single modes 13.4 5.1 14.6 12.5 7.8 17.0 9.5 11.4 15.5 49.6 9.3 48.7
Truck 16.5 5.2 18.0 18.6 8.0 24.0 19.3 10.6 26.0 48.9 9.7 49.7
Rail 28.4 12.5 26.0 17.7 14.5 23.2 14.8 14.2 16.1 10.8 4.1 8.6
Water 34.9 35.1 72.9 45.8 34.7 131.3 48.9 37.3 142.7 25.3 21.5 33.3
Air (including truck and air) S 39.9 S S S S S S S 47.0 32.1 41.1
Pipeline S 48.7 S S 48.2 S S S S S S S
Multiple modes S 13.5 S 28.4 26.8 51.0 30.1 22.9 54.2 25.0 9.6 21.6
Parcel, USPS or courier S 39.0 S S 40.4 S S 39.4 S 24.2 9.6 18.7
Truck and rail 44.2 13.6 60.7 28.2 30.1 57.9 30.0 24.9 59.0 4.2 8.3 9.3
Other multiple modes S S S S S S S S S 29.1 27.5 73.0
Other and unknown modes 20.2 31.6 28.2 24.6 26.8 46.7 30.8 33.7 47.1 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 23.2 63.8 46.2 27.2 71.7 33.3 20.9 67.2 38.1 30.4 26.7
Single modes 39.1 23.8 65.4 47.4 27.5 73.4 33.4 21.1 68.2 34.2 9.2 28.1
Truck 41.4 24.5 67.9 S 28.1 S 33.6 22.9 49.2 34.6 8.6 27.9
Rail 29.5 27.1 35.4 38.2 32.1 80.0 32.6 S S 9.4 14.2 12.2
Water S S S S S S S S S 28.8 27.9 246.3
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S 36.4 S S S S S S S 41.2 19.8 12.2
Parcel, USPS or courier S 42.2 S S 36.0 S S S S 42.9 20.8 12.6
Truck and rail S S S S S S S S S 31.6 29.8 12.3
Other multiple modes S S S S S S S S S 31.6 31.6 62.7
Other and unknown modes 41.6 37.4 63.7 S S S 37.1 S S S 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 20.5 14.3 34.2 14.5 12.0 17.0 31.5 11.2 24.2 25.9 11.2 27.7
Single modes 20.6 14.8 35.5 14.1 12.3 17.9 28.1 13.7 25.5 26.8 11.7 27.2
Truck 35.9 7.2 66.7 33.2 9.5 42.3 S 16.8 S 20.8 10.9 22.3
Rail 11.3 14.8 8.6 20.2 15.6 15.0 28.9 12.6 14.2 26.0 14.7 23.9
Water S 40.8 S S S S S S S 28.6 S S
Air (including truck and air) S S S S S S 27.9
Pipeline 17.7 31.2 40.3 18.6 29.8 35.2 S S S S S S
Multiple modes 45.5 26.8 26.0 45.8 24.3 18.4 S 26.0 S S S S
Parcel, USPS or courier S S S S S S S 26.7 S 36.9 S S
Truck and rail 46.5 47.6 48.8 26.4
Other multiple modes 47.3 24.4 36.0 45.8 24.3 18.4 S 26.2 S S 13.4 S
Other and unknown modes S S S S S S S S S S 16.3 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 20.6 6.4 25.6 27.9 8.1 38.7 34.6 7.3 79.8 17.9 5.6 13.6
Single modes 21.7 7.7 29.6 29.2 8.6 41.2 36.6 8.0 93.7 23.4 12.6 33.5
Truck 22.0 7.5 30.4 23.8 10.5 25.8 30.1 7.7 57.0 23.1 12.9 31.7
Rail 32.5 23.9 44.2 S 18.1 S S 15.9 S 9.0 9.3 14.4
Water S 47.4 S S 40.3 S S S S 33.1 36.1 19.6
Air (including truck and air) 33.4 31.2 67.7 26.0 S S 35.1 S S 11.8 5.0 18.6
Pipeline S S S S S S S S S S S S
Multiple modes 25.0 7.8 19.0 S 15.0 S S 18.3 S 7.3 4.7 8.2
Parcel, USPS or courier 25.5 9.4 22.9 29.8 18.3 28.3 38.6 24.7 43.1 7.5 4.8 8.3
Truck and rail 44.7 24.2 14.3 S 18.4 S S 19.7 S 10.8 7.7 13.6
Other multiple modes S S S S 49.1 S S S S 31.4 42.5 175.2
Other and unknown modes 28.0 28.0 19.4 41.2 33.6 49.7 30.1 27.2 19.6 S 25.5 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 11.6 6.6 13.7 20.4 21.3 29.8 21.3 12.1 24.2 11.0 7.3 12.4
Single modes 13.0 6.8 15.1 20.0 22.6 30.5 19.1 10.8 21.2 16.1 18.7 17.9
Truck 13.0 6.8 15.3 20.0 22.7 30.8 19.2 10.5 21.3 15.9 19.3 21.2
Rail 47.0 32.8 33.1 49.9 S S S 47.6 S 26.9 22.8 32.3
Water
Air (including truck and air) 48.8 S S 36.2 35.1 14.0 38.1 34.6 15.1 10.5 6.8 11.0
Pipeline S S S S S S S S S S
Multiple modes 18.0 12.0 23.3 38.2 32.3 43.9 45.7 41.9 54.3 5.2 7.7 10.5
Parcel, USPS or courier 16.0 11.9 21.2 22.4 20.5 23.0 27.3 25.0 26.8 5.2 7.7 10.5
Truck and rail S 38.0 S S S S S S S 31.6 11.3 26.5
Other multiple modes S S S S S S 29.2
Other and unknown modes 33.6 11.9 20.8 S 15.2 S S 21.2 S S 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 12.7 3.6 13.3 27.8 S S 13.2 12.7 18.5 10.1 8.8 11.3
Single modes 13.0 4.4 14.3 28.1 S S 13.7 13.6 21.2 13.1 15.5 22.2
Truck 13.1 4.6 14.5 28.3 S S 11.9 15.4 21.7 15.8 16.5 25.0
Rail 39.4 25.3 46.9 33.4 17.4 54.9 30.3 12.4 33.9 39.8 9.1 26.4
Water S S S S S S S S S 33.3 30.8 55.3
Air (including truck and air) S 26.0 S S 29.0 S S 25.9 S 10.5 4.4 12.5
Pipeline S S S S S S S S S S
Multiple modes 24.1 4.7 18.9 S 12.8 S 26.5 13.5 14.6 14.1 6.9 13.8
Parcel, USPS or courier 26.5 6.5 21.4 15.5 9.3 10.0 17.8 6.6 10.3 14.3 6.8 13.9
Truck and rail 22.6 26.1 18.9 22.6 18.6 5.2 24.1 18.0 9.0 13.4 7.2 16.7
Other multiple modes S S S S S S S S S 46.8 S S
Other and unknown modes 24.5 17.4 35.5 33.2 35.1 8.4 44.6 48.0 5.0 S 37.0 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 12.4 7.5 16.2 45.3 8.8 87.3 S 12.4 S 5.9 8.0 14.6
Single modes 14.8 8.6 15.8 49.5 8.8 99.1 S 11.4 S 12.3 22.2 46.0
Truck 13.0 8.5 15.4 27.7 8.0 42.7 18.0 11.0 20.9 13.9 32.3 107.6
Rail S S S S 20.3 S S 25.7 S S 8.9 S
Water S S S S S S S S S 31.6 31.6 48.8
Air (including truck and air) 43.3 17.7 28.3 26.7 20.4 17.0 27.3 34.7 22.2 8.6 4.5 10.1
Pipeline S S S S S S S S S S
Multiple modes 19.2 12.1 33.0 19.3 30.3 29.8 15.4 34.6 22.6 6.0 5.0 8.3
Parcel, USPS or courier 20.3 11.7 38.2 24.0 16.9 41.4 20.4 14.3 35.9 5.9 5.0 8.2
Truck and rail 34.8 S S 29.5 S S 29.3 46.7 16.6 20.2 20.5 28.6
Other multiple modes S S S S S S S S S 28.0 27.9 19.1
Other and unknown modes 29.1 33.2 113.3 27.2 30.3 105.1 30.2 S S 36.7 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 15.0 8.6 49.3 37.6 15.0 135.2 18.8 20.8 60.3 10.5 6.2 9.9
Single modes 13.8 10.6 50.8 37.3 15.6 127.3 18.8 22.9 60.7 18.3 9.6 12.8
Truck 13.6 10.3 49.8 30.3 16.5 85.4 18.6 26.3 57.2 19.3 9.8 13.4
Rail S 43.7 S S 29.6 S 47.8 28.2 157.8 S 12.3 S
Water S S S S S S 29.8
Air (including truck and air) 40.5 43.4 26.3 29.3 36.9 26.8 27.5 41.4 27.9 28.3 8.9 29.4
Pipeline S S S S S S
Multiple modes 30.7 12.1 98.2 S 21.2 S 26.6 32.2 166.9 10.6 4.0 9.2
Parcel, USPS or courier 26.6 12.4 68.3 S 18.7 S 28.1 19.5 94.8 10.6 4.0 9.2
Truck and rail S S S S 47.6 S 40.7 S S 33.5 19.5 21.1
Other multiple modes S S S S S S S S S 29.8 29.8 42.8
Other and unknown modes 34.1 33.2 62.3 S 24.4 S S 24.7 S S 42.2 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 23.7 26.4 10.9 S 48.2 S S 28.4 S 26.4 20.6 29.2
Single modes 25.1 34.5 17.3 S 49.7 S S 30.6 S S S S
Truck 22.0 35.4 15.0 S S S S 30.4 S 35.7 S S
Rail S 45.9 S S S S S S S 31.6 33.6 37.9
Water S S S S S S 28.0
Air (including truck and air) S S S S S S S S S 31.6 25.1 67.9
Pipeline S S S S S S S S S S
Multiple modes 35.5 38.9 5.9 S 36.7 S S 45.1 S 19.9 14.9 27.2
Parcel, USPS or courier 28.9 38.7 4.2 34.9 38.3 4.2 39.0 48.9 4.3 20.1 14.9 27.4
Truck and rail S S S S S S S S S 30.4 31.6 58.7
Other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S S S S S 44.5 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.