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 4.0 3.4 6.1 9.6 8.5 15.2 5.8 4.6 9.3 8.4 4.7 11.0
Single modes 4.8 4.5 7.7 9.9 8.7 15.8 4.9 3.1 8.0 23.5 10.5 37.3
Truck 4.9 4.3 7.6 12.4 9.2 18.8 6.7 3.8 10.8 22.6 13.5 26.7
Rail 23.6 8.4 34.5 23.1 12.5 40.0 14.0 10.6 25.2 8.7 5.8 10.6
Water 43.0 S S 39.2 S S S S S 13.2 14.5 26.9
Air (including truck and air) 15.0 11.2 20.9 41.4 15.5 25.6 23.2 18.4 14.1 5.7 2.4 8.9
Pipeline 18.8 13.9 33.2 18.4 12.1 26.2 S S S S S S
Multiple modes 7.6 3.3 10.9 18.5 5.2 37.1 24.6 10.5 48.1 5.6 3.3 6.3
Parcel, USPS or courier 7.5 3.9 11.4 9.8 5.3 12.5 13.5 8.1 16.7 5.6 3.4 6.3
Truck and rail 21.2 41.9 34.6 28.5 15.6 67.4 31.5 21.4 52.4 6.5 4.4 6.7
Other multiple modes 34.3 14.1 48.2 48.9 16.9 200.8 47.9 20.0 186.3 1.9 4.1 4.8
Other and unknown modes 11.2 10.2 11.0 29.8 17.7 22.3 12.8 27.2 7.9 18.0 23.9 25.5

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 18.8 5.6 25.9 33.8 13.1 51.2 22.6 11.2 54.3 41.9 24.4 65.2
Single modes 19.5 5.8 27.9 35.4 13.5 53.3 20.8 12.2 43.6 S 26.8 S
Truck 19.7 5.7 28.2 37.2 13.7 54.7 24.9 12.3 45.1 S 18.5 S
Rail S 18.5 S S 36.3 S S 37.5 S 9.5 13.4 20.5
Water S 42.5 S S S S S S S 29.8 28.2 77.0
Air (including truck and air) 37.4 37.1 16.7 45.5 42.0 16.5 S 48.2 S 7.6 8.5 15.3
Pipeline S S S S S S
Multiple modes 28.0 19.5 36.8 48.0 18.3 298.1 48.3 18.1 336.0 11.5 11.7 18.4
Parcel, USPS or courier S 33.9 S S S S S S S 19.9 13.3 26.4
Truck and rail 30.6 23.5 34.8 34.8 24.6 56.6 39.4 25.8 64.1 4.5 16.1 19.2
Other multiple modes 46.3 48.1 119.0 S 39.2 S S 37.4 S 5.4 2.4 6.0
Other and unknown modes 28.5 12.8 10.0 38.0 22.4 6.2 33.3 28.0 7.2 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 11.7 4.5 14.0 10.5 9.4 13.5 12.8 8.4 18.2 18.5 21.4 34.6
Single modes 11.6 4.3 13.7 10.9 9.6 14.0 13.1 7.1 18.0 22.7 17.9 37.4
Truck 12.4 4.5 15.0 11.6 10.2 14.9 14.3 6.6 22.9 23.1 13.4 45.2
Rail 32.6 17.1 24.7 30.1 12.6 22.8 31.3 17.0 24.8 8.3 7.0 9.3
Water 49.7 S S 47.3 S S 46.0 S S 24.6 20.5 33.3
Air (including truck and air) 36.4 39.4 6.3 49.6 29.9 3.3 S 32.4 S 11.9 11.5 16.8
Pipeline S S S S S S S S S S
Multiple modes 33.7 20.7 56.5 S 21.8 S S 23.7 S 40.6 17.4 29.7
Parcel, USPS or courier S 47.2 S S 48.9 S S S S 31.4 17.3 22.8
Truck and rail 41.4 27.8 67.4 S 27.1 S S 28.3 S 5.0 3.6 5.3
Other multiple modes 27.9 11.8 20.8 24.7 16.1 10.7 24.1 20.2 11.3 1.2 15.6 22.1
Other and unknown modes 43.2 19.2 33.7 S 28.0 S 42.6 39.3 79.2 24.2 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 10.8 21.6 22.8 23.9 23.3 37.6 20.5 17.7 44.5 S 29.4 S
Single modes 10.3 23.0 25.0 24.7 24.6 39.4 21.3 21.2 56.2 13.9 12.5 18.8
Truck 13.2 23.4 22.9 26.3 25.0 40.1 23.7 23.3 41.4 11.0 12.5 15.2
Rail 43.3 45.5 749.9 S S S 43.2 39.1 584.1 28.0 37.4 75.6
Water S S S S S S 29.8
Air (including truck and air) S S S S S S S S S 31.6 31.6 44.2
Pipeline S S S S S S
Multiple modes 44.4 S S S 36.2 S S 39.8 S 42.0 38.3 65.7
Parcel, USPS or courier S S S S S S 42.8 S S 46.7 31.0 71.0
Truck and rail S 41.5 S S 41.7 S S 41.2 S 26.1 23.7 19.1
Other multiple modes S S S S S S 31.6
Other and unknown modes S 42.8 S S 48.3 S S 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 8.7 9.9 14.9 8.7 8.7 13.1 17.5 13.3 27.0 S 24.4 S
Single modes 9.2 10.5 16.0 8.8 8.9 13.3 16.7 15.6 28.0 S 27.2 S
Truck 8.5 11.1 14.6 9.2 9.2 14.2 15.2 15.8 28.8 S 28.0 S
Rail S 13.2 S S 13.7 S 33.1 31.0 98.4 30.0 27.1 38.8
Water 49.0 S S 44.9 S S S S S 30.4 S S
Air (including truck and air) S S S S S S S S S 31.6 27.2 49.1
Pipeline 18.8 13.9 33.0 18.4 12.1 25.9 S S S S S S
Multiple modes S 33.4 S 48.6 S S 42.2 38.6 624.0 27.6 S S
Parcel, USPS or courier S 41.3 S S 44.9 S S 38.3 S 29.2 S S
Truck and rail S S S S S S S S S 27.8 S S
Other multiple modes S S S S S S S S S 29.8 26.0 59.2
Other and unknown modes S S 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 6.7 4.9 9.9 29.4 20.1 68.2 19.1 5.9 30.5 13.2 8.1 21.1
Single modes 6.7 3.6 8.5 29.9 21.5 73.4 18.1 6.8 29.9 24.7 10.8 36.1
Truck 7.6 3.6 9.1 31.5 22.4 76.4 17.8 5.6 26.7 24.5 11.9 30.6
Rail 41.6 19.7 40.2 S 15.6 S S 23.0 S 14.0 6.8 12.5
Water S S S S S S S S S 31.6 26.2 36.9
Air (including truck and air) 38.1 23.6 90.7 33.6 30.3 14.8 35.1 29.7 18.7 3.7 4.0 7.2
Pipeline S S S S S S S S S S S S
Multiple modes 13.8 11.3 29.8 9.9 11.5 10.0 13.8 13.5 12.7 9.1 10.8 17.7
Parcel, USPS or courier 14.0 11.5 30.7 9.4 13.4 10.6 15.8 14.2 15.6 9.1 10.9 17.8
Truck and rail 40.1 37.3 55.2 33.6 26.7 36.0 47.7 28.3 34.1 24.2 3.9 19.4
Other multiple modes S 44.4 S 46.7 29.7 19.3 45.3 29.2 20.7 17.9 7.7 23.6
Other and unknown modes 24.2 37.0 21.6 39.3 48.5 40.3 S 16.7 S 45.2 27.1 31.6

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 15.3 7.1 19.0 12.6 11.5 12.5 8.4 8.7 9.4 6.5 6.9 9.3
Single modes 18.1 8.3 22.9 13.3 11.6 13.1 9.5 6.5 9.4 17.7 13.6 25.9
Truck 18.2 8.7 23.9 11.9 12.0 12.5 8.6 5.6 9.0 19.8 13.9 32.0
Rail 39.7 19.3 36.5 49.0 17.1 47.1 29.4 17.0 21.0 36.0 10.8 17.3
Water S S S S S S S S S 23.6 21.1 33.1
Air (including truck and air) 30.2 30.7 11.7 24.0 27.4 8.3 23.0 28.9 8.7 3.4 5.0 8.4
Pipeline S S S S S S S S S S
Multiple modes 11.7 19.2 21.3 19.1 8.2 19.7 21.7 10.6 22.7 9.0 8.4 12.0
Parcel, USPS or courier 12.1 19.6 22.0 14.5 8.3 15.8 11.5 10.7 14.5 9.0 8.5 12.1
Truck and rail 30.0 28.6 18.2 S 31.4 S 48.3 26.8 57.1 16.2 14.2 25.8
Other multiple modes 47.3 31.0 55.0 S 40.6 S S 42.7 S 7.1 5.9 8.9
Other and unknown modes 21.9 15.0 32.4 20.0 19.6 12.2 18.6 S S 37.6 35.7 28.7

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 11.2 4.0 14.1 21.9 10.8 35.8 26.6 7.7 34.5 18.7 8.4 22.5
Single modes 11.6 4.4 15.6 22.7 11.3 38.0 28.4 4.8 46.0 37.5 12.9 41.6
Truck 11.4 4.1 15.5 22.5 11.6 38.9 30.5 4.5 55.9 40.3 16.1 52.7
Rail 26.8 13.1 52.6 36.4 24.3 31.4 33.0 26.0 36.2 31.4 11.6 24.1
Water S S S S S S S S S 25.8 S S
Air (including truck and air) 44.9 29.6 49.4 38.3 31.3 5.1 S 30.9 S 9.4 3.9 11.9
Pipeline S S S S S S S S S S
Multiple modes 14.8 9.6 18.7 18.8 7.1 21.8 24.5 28.2 38.5 13.0 9.2 19.6
Parcel, USPS or courier 15.2 9.9 18.4 24.6 9.3 29.9 29.7 15.5 48.3 13.2 9.2 19.8
Truck and rail 43.1 38.3 146.3 S 48.6 S S S S 25.9 18.5 55.5
Other multiple modes S 35.0 S 42.3 28.1 31.2 43.0 S S 0.9 11.7 13.2
Other and unknown modes 25.7 12.7 19.3 27.2 14.1 28.8 25.2 24.8 7.9 30.3 12.2 43.2

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 7.7 3.9 9.2 34.5 10.7 59.0 11.5 20.4 19.6 7.5 5.1 10.3
Single modes 13.7 5.9 14.4 39.3 12.0 71.9 15.9 25.5 24.0 21.3 16.9 61.9
Truck 15.5 7.2 15.9 39.8 12.8 75.4 16.5 28.0 25.6 31.6 20.6 35.5
Rail 48.5 29.2 79.9 48.3 S S S 24.4 S 24.3 7.1 20.6
Water S 36.1 S S 38.5 S S S S 28.2 29.8 50.6
Air (including truck and air) 20.5 14.5 27.7 19.6 12.7 15.7 23.5 11.2 24.4 7.4 2.6 11.9
Pipeline S S S S S S S S S S S S
Multiple modes 13.0 6.6 20.9 16.5 8.7 31.8 18.6 8.3 29.2 9.7 3.9 8.3
Parcel, USPS or courier 12.9 7.3 22.0 16.7 9.2 33.4 18.4 9.4 30.4 9.7 3.9 8.3
Truck and rail S S S S S S S S S 26.6 21.3 34.2
Other multiple modes S 47.6 S 40.6 37.9 55.2 41.8 33.9 73.9 15.0 19.2 26.3
Other and unknown modes 19.1 17.4 16.8 43.4 17.5 34.3 S 22.5 S 32.4 27.6 36.2

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 9.8 21.3 34.4 17.1 14.9 30.3 14.1 26.6 30.5 13.6 8.1 14.6
Single modes 10.3 26.9 44.7 17.8 17.9 38.1 15.9 12.5 31.6 17.7 17.7 15.2
Truck 10.7 27.5 45.3 18.1 18.1 38.8 17.1 13.2 34.1 20.1 19.5 11.6
Rail S 20.3 S S 28.7 S S 23.1 S 18.2 22.2 58.4
Water S S S S S S S 48.8 S 34.3 38.5 34.9
Air (including truck and air) 24.9 21.3 59.5 S 46.2 S 40.8 S S 6.7 3.2 9.4
Pipeline S S S S S S S S S S
Multiple modes 11.8 14.4 19.4 17.1 21.0 28.8 21.2 26.2 29.4 10.1 3.3 10.6
Parcel, USPS or courier 12.0 14.8 20.0 15.7 22.9 31.5 15.6 29.1 26.9 10.2 3.4 10.6
Truck and rail 35.7 23.6 26.4 47.7 24.3 89.0 48.5 23.2 85.6 14.0 4.4 13.3
Other multiple modes 28.8 42.7 67.9 25.6 46.2 24.5 28.0 S S 4.9 8.2 10.0
Other and unknown modes 16.6 19.2 34.9 37.9 47.3 11.8 29.1 S S 47.0 24.5 23.5

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 42.4 28.3 28.3 40.9 S S 34.3 31.3 12.0 17.4 25.0 34.5
Single modes 24.4 32.2 14.8 41.9 S S 37.5 35.0 13.6 25.8 33.9 29.5
Truck 25.3 35.9 16.7 23.0 S S 39.9 36.0 14.9 47.6 35.5 28.5
Rail S S S S S S S S S 44.4 32.6 28.5
Water
Air (including truck and air) S S S S 49.8 S S S S 24.2 16.2 41.8
Pipeline S S S S S S S S S S
Multiple modes S 17.9 S 49.4 S S S 40.5 S 20.9 36.9 75.9
Parcel, USPS or courier S 18.7 S 31.7 24.4 11.1 41.6 20.6 16.3 20.9 36.9 75.8
Truck and rail S S S S S S S S S 31.6 S S
Other multiple modes
Other and unknown modes S 46.2 S S 46.7 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.