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 4.7 5.1 7.9 9.4 5.2 9.7 17.1 5.9 25.0 11.8 6.7 13.5
Single modes 5.2 5.8 9.0 9.2 5.1 9.5 14.9 5.7 21.8 20.4 8.0 26.9
Truck 4.8 6.0 8.9 9.6 5.5 9.9 11.8 7.0 16.2 20.9 8.4 25.9
Rail 25.6 16.3 31.4 29.2 27.8 28.3 27.4 19.6 32.1 17.0 11.2 19.3
Water 43.6 45.9 22.3 S S S 40.2 S S 23.7 S S
Air (including truck and air) 17.7 12.9 25.4 S 9.8 S S 13.6 S 6.3 3.5 8.6
Pipeline 50.0 S S 47.0 S S S S S S S S
Multiple modes 11.9 7.7 16.4 40.8 8.4 64.9 S 14.5 S 5.5 6.8 9.1
Parcel, USPS or courier 12.0 7.7 15.4 12.1 5.4 11.7 12.7 6.4 14.2 5.6 6.8 9.1
Truck and rail 41.0 18.8 27.3 24.7 23.5 16.6 23.5 28.4 17.4 10.6 12.4 19.4
Other multiple modes S 35.2 S S S S S 46.2 S 24.1 48.4 113.2
Other and unknown modes 21.1 11.0 20.3 30.6 25.9 42.5 31.5 23.6 16.2 48.0 27.9 104.0

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 33.4 15.2 36.1 38.8 18.3 25.2 44.3 21.2 24.5 S 49.1 S
Single modes 32.5 17.9 34.8 39.1 21.0 25.4 44.8 22.5 25.9 S 37.2 S
Truck 32.5 18.1 35.2 39.1 21.9 26.5 44.8 25.8 28.9 S 40.7 S
Rail 31.5 29.0 36.5 24.2
Water
Air (including truck and air) S S S S S S 30.3
Pipeline S S S S S S S S S S
Multiple modes S 37.4 S 49.1 S S S S S 34.2 19.5 32.2
Parcel, USPS or courier S 46.1 S S S S S S S 34.1 20.2 32.2
Truck and rail S S S S S S 30.9
Other multiple modes S S S S S S 31.6
Other and unknown modes S 48.2 S S S 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 14.7 8.4 15.8 24.3 12.6 29.9 31.1 15.0 37.3 S 22.5 S
Single modes 15.1 8.4 16.2 24.8 12.7 30.6 31.4 15.1 38.5 32.6 25.0 52.2
Truck 15.2 8.4 16.4 24.8 12.8 31.1 31.5 15.5 40.8 32.6 25.1 52.9
Rail S 15.2 S S 14.9 S S 22.3 S 30.8 9.8 47.1
Water S S S S S S S S S 30.3 31.6 2.9
Air (including truck and air) S S S S S S 29.5
Pipeline S S S S S S
Multiple modes 28.4 37.5 42.7 49.8 S S 46.8 S S 13.1 17.4 36.8
Parcel, USPS or courier 47.4 S S 40.4 46.6 8.8 49.3 43.1 27.5 20.4 18.5 46.7
Truck and rail S S S S S S S S S 31.6 19.8 40.0
Other multiple modes S S S S S S 33.4
Other and unknown modes S 17.6 S 43.4 22.3 46.0 44.6 26.4 26.5 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 41.9 16.9 54.1 22.7 7.8 14.5 44.8 16.1 72.0 25.5 12.8 60.6
Single modes 43.6 19.0 59.3 22.6 7.7 13.9 45.8 17.1 76.2 26.4 13.3 69.7
Truck 43.0 19.3 58.4 22.2 7.7 13.3 47.4 16.8 68.1 25.5 13.2 65.0
Rail S 40.7 S S 39.7 S S 49.1 S 32.4 22.3 45.2
Water S S S S S S 31.8
Air (including truck and air) S S S S S S S S S 30.4 30.4 89.7
Pipeline 41.0 41.4 S S S S S S
Multiple modes S S S S S S S S S S 44.0 S
Parcel, USPS or courier S 42.4 S S S S S 39.3 S S 43.3 S
Truck and rail S S S S S S S S S 29.3 29.4 34.1
Other multiple modes S S S S S S S S S 31.6 31.6 1.7
Other and unknown modes S S S S S S S 47.1 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 24.1 6.8 35.8 22.0 14.9 25.8 43.2 24.9 190.0 S 25.7 S
Single modes 24.3 6.9 36.1 22.1 14.9 26.0 43.5 25.1 191.5 S 21.5 S
Truck 23.6 9.5 36.1 22.4 15.5 27.0 S 6.9 S S 21.9 S
Rail 42.1 47.3 48.4 24.7
Water S S S S S S 29.8
Air (including truck and air) S S S S S S S S S 29.8 31.6 24.0
Pipeline S S S S S S S S S S
Multiple modes 32.6 43.9 62.5 33.6 S S S S S S 22.8 S
Parcel, USPS or courier 33.1 S S 34.2 S S S S S S 23.1 S
Truck and rail
Other multiple modes S S S S S S S S S 31.6 31.6 S
Other and unknown modes S 42.3 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 16.3 19.1 32.4 23.6 15.7 30.8 29.0 16.1 44.6 13.2 11.8 13.9
Single modes 14.6 19.7 34.0 24.0 16.5 31.9 29.9 17.3 46.3 14.7 13.8 21.2
Truck 13.8 20.6 34.2 25.4 16.5 32.6 35.2 22.1 58.0 14.7 15.9 26.2
Rail 49.0 38.8 67.5 34.4 34.5 61.8 33.9 42.5 66.8 24.9 24.0 38.2
Water S S S S S S S S S 31.6 S S
Air (including truck and air) S 21.4 S S 34.0 S S 42.2 S 13.3 10.9 14.2
Pipeline S S S S S S
Multiple modes 26.9 22.4 29.0 36.8 22.7 58.6 24.6 37.2 55.0 14.2 10.5 16.1
Parcel, USPS or courier 21.7 22.8 18.7 25.5 14.1 19.9 22.8 15.7 27.2 14.1 10.5 15.2
Truck and rail 33.4 19.9 22.3 S S S 42.7 S S 20.1 15.1 23.4
Other multiple modes S 40.1 S S 35.7 S S 43.9 S 31.6 38.9 90.2
Other and unknown modes S 23.4 S S 27.1 S S 42.5 S 27.8 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 14.5 6.8 17.5 17.8 11.6 22.4 41.8 14.0 65.1 14.6 14.7 20.6
Single modes 19.5 7.7 22.5 17.9 11.4 21.6 27.5 14.2 32.3 25.0 12.5 27.2
Truck 19.8 8.3 23.3 18.1 11.3 22.4 28.9 13.5 36.3 26.0 13.0 26.0
Rail 45.3 25.8 6.8 43.0 30.3 5.4 S 34.2 S 28.5 10.0 37.1
Water S S S S S S S S S 32.5 29.0 7.8
Air (including truck and air) 33.8 49.0 73.1 S 42.2 S S 37.2 S 12.0 9.4 24.6
Pipeline S S S S S S S S S S
Multiple modes 25.7 12.1 35.6 S 14.3 S S 24.7 S 12.3 15.1 20.5
Parcel, USPS or courier 11.9 12.2 15.6 20.6 9.1 27.5 31.9 16.2 50.0 11.6 15.1 19.4
Truck and rail 42.1 40.6 14.4 S S S 46.3 S S 29.3 14.9 23.3
Other multiple modes S S S S S S S S S 28.2 30.3 75.3
Other and unknown modes 32.2 28.7 28.7 39.8 36.5 19.1 33.1 49.6 6.6 47.0 34.7 55.7

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 7.7 5.1 7.4 26.2 11.7 30.6 8.9 8.2 11.7 23.8 15.2 26.3
Single modes 8.7 5.0 7.8 26.5 11.8 32.7 9.8 8.5 13.5 45.7 15.6 43.3
Truck 9.0 5.0 7.9 27.0 12.0 33.3 9.0 8.3 12.3 40.6 14.1 33.7
Rail 39.6 S S 31.0 30.6 49.0 39.4 39.9 91.7 24.9 19.7 44.2
Water S S S S S S S S S 39.3 31.6 4.8
Air (including truck and air) 21.4 16.0 22.8 S 19.8 S S 21.5 S 7.5 9.1 12.7
Pipeline S S S S S S S S S S S S
Multiple modes 15.3 13.3 23.1 30.2 14.6 22.2 37.7 22.5 41.9 13.3 9.9 14.2
Parcel, USPS or courier 17.0 13.9 26.8 14.8 15.6 17.2 24.4 22.1 26.6 13.3 9.9 14.2
Truck and rail S 37.7 S S 29.9 S 48.4 32.3 44.3 27.2 40.0 94.9
Other multiple modes S S S S S S S S S 31.6 S S
Other and unknown modes 17.7 15.9 9.8 21.9 49.9 8.9 44.4 20.3 12.9 S 40.8 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 9.1 8.3 14.4 31.0 7.8 89.7 17.2 11.6 32.0 12.2 11.6 21.1
Single modes 12.5 8.3 18.4 32.8 9.4 105.3 18.5 14.0 38.1 33.6 27.9 84.6
Truck 13.0 9.4 19.1 34.6 10.6 113.9 22.1 17.1 42.1 S 35.3 S
Rail 48.9 S S 30.1 S S 37.5 S S 18.1 S S
Water S S S S S S S S
Air (including truck and air) 24.9 17.6 34.1 18.7 12.5 18.8 24.2 12.5 27.8 6.1 6.6 10.5
Pipeline S S S S S S S S S S
Multiple modes 12.7 10.2 17.1 22.6 19.3 32.1 20.3 27.7 37.9 7.2 4.7 9.2
Parcel, USPS or courier 12.5 10.3 17.0 25.0 17.6 31.5 13.7 22.2 26.5 7.3 4.7 9.2
Truck and rail 39.5 42.4 86.0 33.9 40.8 71.6 38.3 49.3 77.8 19.6 29.7 46.4
Other multiple modes S S S S S S 32.2
Other and unknown modes 33.0 14.2 51.5 S 27.8 S 25.0 35.4 66.9 S 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 8.6 15.8 26.3 22.7 19.5 49.4 20.5 12.1 31.3 13.0 5.7 10.4
Single modes 11.7 23.8 42.5 24.2 21.0 51.0 19.7 14.1 33.7 23.9 20.2 22.9
Truck 12.1 24.9 45.0 27.1 22.2 54.3 20.8 13.0 31.6 22.7 20.4 22.2
Rail S S S S S S S S S 34.2 41.3 35.4
Water S S S S S S S S S 29.8 35.7 117.9
Air (including truck and air) 26.6 32.4 32.0 S S S S 45.6 S 10.0 6.1 14.7
Pipeline S S S S S S
Multiple modes 25.1 9.4 39.8 12.9 16.4 13.5 26.1 23.5 28.8 6.1 3.5 7.7
Parcel, USPS or courier 25.0 8.9 39.8 16.1 15.4 13.9 16.8 18.1 18.2 6.0 3.5 7.7
Truck and rail S S S S S S S S S 31.6 27.4 54.9
Other multiple modes S S S S S S 29.8
Other and unknown modes 29.2 26.0 14.0 S 39.3 S S S S 42.5 43.4 44.3

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 33.2 39.6 7.9 45.2 32.8 16.9 35.3 S S 29.3 20.1 22.6
Single modes 43.2 46.9 10.4 45.9 38.8 20.7 37.6 46.9 12.2 S S S
Truck 43.4 46.8 11.0 45.9 38.8 21.5 37.7 33.2 14.3 S S S
Rail S S S S S S 30.3
Water
Air (including truck and air) S S S S S S S S S 29.8 28.3 69.6
Pipeline S S S S S S
Multiple modes 41.4 34.8 7.6 23.4 45.6 5.5 31.3 S S 15.8 15.6 21.1
Parcel, USPS or courier 41.4 35.1 7.7 23.4 46.3 8.4 31.3 S S 15.8 15.6 21.1
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S 48.9 S S S S S S S 30.3 28.7 107.9

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.