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 4.5 5.7 9.2 10.2 5.7 15.8 9.8 9.5 20.2 8.6 11.6 13.5
Single modes 5.4 5.9 10.3 10.7 5.8 16.5 10.0 9.4 19.7 13.9 7.3 16.5
Truck 4.3 3.2 7.3 13.4 8.9 20.7 14.5 5.4 24.4 12.3 4.5 16.1
Rail 39.1 38.2 58.6 17.3 18.6 55.4 17.7 22.9 51.4 8.8 8.4 9.6
Water 33.8 36.3 45.6 S 20.1 S 35.9 22.2 38.7 S 10.2 S
Air (including truck and air) 28.7 15.6 25.6 29.3 27.4 50.0 34.9 25.3 65.3 5.7 2.1 6.3
Pipeline S 42.1 S S 41.8 S S S S S S S
Multiple modes 6.3 14.9 18.0 48.5 28.2 136.7 34.2 28.1 105.7 4.8 9.3 10.5
Parcel, USPS or courier 8.3 13.8 18.6 22.4 21.1 46.2 31.3 34.7 78.4 4.8 9.3 10.6
Truck and rail 32.2 31.9 25.2 40.3 33.7 42.2 36.9 28.5 52.4 15.6 5.6 23.2
Other multiple modes 34.6 S S S 49.3 S S S S S 39.4 S
Other and unknown modes 26.8 14.4 26.9 40.3 15.2 27.9 46.0 15.2 93.2 34.1 22.6 141.8

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 9.7 23.6 21.9 12.4 41.3 21.3 24.2 48.3 39.0 31.2 62.5
Single modes 20.5 9.1 24.5 22.3 12.3 43.1 21.5 24.8 49.2 42.0 31.1 70.9
Truck 23.9 13.2 29.4 32.3 19.5 68.9 36.8 21.6 83.6 40.6 32.6 72.0
Rail 43.5 23.6 76.3 42.5 34.7 120.3 39.3 33.2 93.8 13.0 16.0 19.0
Water 41.0 45.0 48.3 42.8 42.1 57.8 45.0 46.3 67.1 18.8 19.1 27.7
Air (including truck and air) S S S S S S S S S 31.6 23.1 18.6
Pipeline S S S S S S S S S S
Multiple modes S 49.7 S S S S S S S S 14.3 S
Parcel, USPS or courier S S S S 46.2 S S S S 37.7 17.0 29.8
Truck and rail S S S S S S 22.3
Other multiple modes S S S S S S S S S 31.6 29.8
Other and unknown modes 41.1 39.1 17.5 S 42.7 S S 46.2 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 25.5 8.4 33.2 20.5 18.7 35.6 21.8 28.0 49.1 S 27.2 S
Single modes 26.0 8.0 34.3 21.3 18.8 36.0 22.6 28.1 48.8 S 31.1 S
Truck 26.1 7.7 33.8 24.0 20.0 39.9 24.4 26.0 52.1 S 31.4 S
Rail 33.7 26.0 63.8 30.3 25.9 48.3 38.5 41.0 61.5 15.2 11.7 21.8
Water S S S S S S 31.6
Air (including truck and air) S S S S S S S S S 29.9 30.3 40.3
Pipeline 43.8 43.1 S S S S S S
Multiple modes S S S S 36.4 S S 34.1 S 27.7 21.2 30.5
Parcel, USPS or courier S S S 47.5 S S 35.6 S S 28.2 21.8 31.0
Truck and rail S 46.9 S S 36.7 S S 34.0 S 31.6 22.8 23.9
Other multiple modes
Other and unknown modes S 32.9 S S 28.2 S S 44.4 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 12.0 15.8 13.7 17.9 16.4 32.8 29.8 21.9 55.2 11.7 41.7 57.6
Single modes 10.4 17.1 14.1 18.5 17.3 33.6 27.0 25.2 49.6 12.5 44.7 65.0
Truck 13.8 20.3 17.8 22.9 21.4 37.7 29.6 27.1 58.6 10.9 15.5 33.0
Rail 35.2 25.0 17.1 45.0 17.0 149.2 46.2 33.4 316.6 16.2 13.1 31.8
Water S 31.6 S S 31.2 S 46.5 29.8 44.9 S 18.8 S
Air (including truck and air) S S S S S S S S S 31.6 28.0 33.0
Pipeline S S S S S S
Multiple modes S S S S S S S S S S 40.5 S
Parcel, USPS or courier S S S 46.0 S S 47.7 S S S S S
Truck and rail S S S S S S 32.7
Other multiple modes S S S S S S 30.1
Other and unknown modes S S S 48.4 S S S S S S 34.7 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 25.0 22.1 33.4 24.0 22.7 29.7 25.2 36.4 29.2 46.2 S S
Single modes 25.0 20.5 34.1 24.0 21.4 30.3 25.2 36.7 29.8 44.0 49.7 39.9
Truck 25.9 20.5 34.0 24.3 21.4 30.2 28.6 36.7 28.1 43.7 49.7 39.5
Rail 48.3 48.0 S S 26.0
Water
Air (including truck and air)
Pipeline S S S S S S S S S S
Multiple modes S 26.8 S S 38.0 S S S S 34.1 22.1 28.3
Parcel, USPS or courier S 32.7 S S 41.4 S S 37.5 S 34.1 17.1 26.6
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S S S S S S S S S 29.8 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 7.9 5.3 13.0 36.8 10.9 53.9 47.9 16.4 62.6 17.8 10.1 19.4
Single modes 10.5 8.2 20.3 36.8 11.1 56.0 48.4 17.4 65.7 27.1 17.4 29.1
Truck 10.3 6.9 19.6 34.3 10.6 57.1 45.0 9.0 72.2 10.2 11.7 17.1
Rail 33.9 S S S 23.2 S S 12.0 S 19.2 11.9 29.1
Water S S S S S S 31.6
Air (including truck and air) 31.8 24.5 77.6 39.4 20.0 61.5 39.8 17.9 68.5 9.2 4.0 9.4
Pipeline S S S S S S
Multiple modes 26.1 22.0 30.1 S 16.8 S S 22.8 S 12.4 8.2 18.4
Parcel, USPS or courier 26.9 22.6 29.9 36.3 13.4 25.8 29.7 12.8 24.3 12.9 8.2 18.9
Truck and rail S 15.1 S S 25.6 S S 25.6 S 30.2 8.9 23.8
Other multiple modes S S S S S S S S S 33.2 31.6 15.6
Other and unknown modes 30.4 40.1 20.6 35.0 44.1 5.2 30.4 34.3 5.4 S 42.4 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 10.2 12.1 18.3 18.5 9.7 21.4 12.8 11.8 21.1 6.1 12.1 12.6
Single modes 9.1 9.6 12.4 18.3 9.4 18.0 17.7 12.3 21.6 12.5 12.9 22.7
Truck 9.3 9.6 12.3 21.4 9.2 18.8 14.9 13.0 16.4 10.0 13.2 26.4
Rail S 39.7 S S 41.9 S S 46.6 S 31.7 17.5 20.9
Water
Air (including truck and air) S 36.5 S S 26.5 S S 25.4 S 7.5 13.3 18.8
Pipeline S S S S S S S S S S
Multiple modes 16.4 33.8 62.4 29.2 42.7 118.9 31.6 S S 4.1 9.1 9.1
Parcel, USPS or courier 17.0 34.0 61.7 37.0 44.5 112.6 46.2 S S 4.1 9.1 9.1
Truck and rail 48.8 S S S S S S S S 25.5 29.9 58.7
Other multiple modes S S S S S S S S S S 31.6 S
Other and unknown modes 26.4 18.3 38.4 S S S 34.1 42.8 33.0 37.0 30.6 104.6

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 9.4 4.9 13.9 12.0 15.0 16.7 22.6 13.7 37.8 27.4 13.0 36.7
Single modes 10.7 5.6 16.3 12.3 15.5 17.4 22.8 14.6 39.7 30.5 7.4 40.3
Truck 11.4 5.5 17.2 14.3 17.4 18.5 31.3 7.9 50.8 42.0 10.2 45.3
Rail 12.4 32.4 15.4 21.5 39.5 69.4 21.7 S S 28.8 12.8 18.0
Water 42.1 S S 41.4 S S 41.0 S S 26.7 26.5 54.0
Air (including truck and air) S 24.1 S S 33.5 S S 29.6 S 10.5 6.7 16.4
Pipeline S S S S S S
Multiple modes 22.3 22.5 33.5 35.4 15.8 61.0 46.1 23.6 82.2 14.7 8.6 22.1
Parcel, USPS or courier 22.4 22.8 31.7 31.8 14.7 53.6 27.1 22.7 56.4 14.8 8.6 22.2
Truck and rail S 36.7 S S 29.1 S S 37.4 S 26.2 15.3 32.6
Other multiple modes S S S S S S 31.6
Other and unknown modes S 29.7 S 45.5 33.2 22.4 36.9 S 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 20.5 17.4 24.4 48.9 15.2 75.6 43.1 21.5 50.5 8.6 6.5 14.4
Single modes 26.2 21.4 30.5 S 17.2 S 47.1 24.4 58.1 17.6 15.2 25.6
Truck 9.9 8.9 11.4 S 12.6 S S 18.0 S 17.4 13.8 36.5
Rail S 46.0 S S 45.3 S 44.3 42.7 30.2 28.5 16.7 24.9
Water
Air (including truck and air) 32.1 20.4 12.2 49.5 47.3 51.0 38.5 41.9 32.4 11.4 2.6 11.6
Pipeline S S S S S S
Multiple modes 19.9 18.1 26.2 24.8 31.3 16.6 25.4 37.4 11.3 9.6 8.1 16.4
Parcel, USPS or courier 20.8 12.6 32.8 28.5 16.6 48.7 28.7 15.7 58.3 9.6 8.1 16.6
Truck and rail S 40.9 S S 40.8 S S 42.4 S 31.6 24.0 46.3
Other multiple modes S S S S S S S S S S 31.6 S
Other and unknown modes 40.0 29.3 39.5 S 29.1 S S 41.0 S 25.7 38.4 197.5

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 16.9 18.2 56.4 27.1 15.2 93.6 27.9 21.7 112.6 12.2 8.2 13.5
Single modes 19.6 17.0 65.7 27.6 15.7 94.1 31.4 22.1 111.2 14.0 6.7 12.0
Truck 19.6 17.5 67.3 22.1 15.7 64.1 18.1 23.9 68.3 13.8 7.0 12.5
Rail 37.3 38.3 121.9 S 24.2 S S 39.0 S S 24.0 S
Water S S S S S S 28.9
Air (including truck and air) 45.3 36.0 19.9 38.3 26.7 14.5 36.0 20.2 16.2 15.9 8.0 19.3
Pipeline S S S S S S
Multiple modes 18.5 29.5 41.8 45.2 19.4 218.1 49.1 30.6 407.8 4.4 9.5 12.4
Parcel, USPS or courier 23.7 30.1 36.5 29.0 18.7 42.1 34.0 17.3 57.3 4.4 9.5 12.4
Truck and rail 49.3 39.2 659.1 S 39.4 S S S S 16.1 26.8 41.7
Other multiple modes 41.1 S S 41.7 S S 44.4 S S 25.3 36.1 91.4
Other and unknown modes 46.1 27.7 161.5 S 28.6 S S 29.5 S S 29.0 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 38.6 45.1 14.8 29.5 44.1 20.0 40.2 39.0 49.2 24.4 20.4 36.2
Single modes 41.8 46.2 24.1 29.7 44.6 20.5 40.5 41.1 52.7 25.7 S S
Truck 46.8 S S 32.2 47.4 23.6 49.7 38.9 52.5 21.3 S S
Rail S S S S S S S S S 31.6 31.6 220.9
Water
Air (including truck and air) S S S S S S S S S 31.6 27.0 37.8
Pipeline S S S S S S
Multiple modes S S S 46.2 S S S S S 22.0 15.3 17.4
Parcel, USPS or courier S S S 46.2 S S S S S 22.0 15.3 17.4
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S S 31.6 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.