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 3.7 6.3 7.7 8.0 5.0 11.4 8.0 11.4 15.6 7.3 6.9 8.9
Single modes 4.5 7.2 8.7 8.4 4.9 12.0 8.3 12.0 17.2 18.7 10.4 25.0
Truck 4.6 7.8 9.4 8.9 6.8 14.7 7.8 10.3 15.3 11.6 11.1 16.0
Rail 14.2 25.6 25.1 14.9 12.7 29.9 13.3 18.5 27.8 11.2 6.3 10.8
Water 21.2 10.0 19.4 20.2 10.7 17.3 36.3 13.8 35.6 26.0 16.6 24.4
Air (including truck and air) 21.8 29.5 25.3 24.1 14.4 27.5 19.6 15.0 27.9 1.9 3.4 5.2
Pipeline 15.9 9.0 23.3 18.2 7.7 23.2 S S S S S S
Multiple modes 15.4 16.3 25.4 43.9 25.7 82.7 25.1 S S 6.4 4.7 7.2
Parcel, USPS or courier 16.3 17.2 27.0 14.9 8.2 19.4 17.6 10.1 22.3 6.5 4.7 7.2
Truck and rail 22.9 25.2 16.8 S 28.0 S 24.2 25.6 17.6 9.3 17.4 25.2
Other multiple modes S S S S S S 39.9 S S 42.9 20.5 20.5
Other and unknown modes 24.4 8.6 37.5 23.8 19.6 18.0 29.1 17.6 29.9 36.9 7.7 37.5

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 15.0 13.8 24.4 24.8 8.6 34.9 22.0 12.3 40.7 S 26.5 S
Single modes 15.2 14.1 25.3 26.0 10.3 37.9 22.8 12.2 41.9 S 26.9 S
Truck 16.7 14.4 27.5 36.4 10.0 47.8 20.5 13.0 27.8 S 26.4 S
Rail 34.0 28.2 44.4 42.6 26.7 104.0 45.1 21.6 148.3 29.2 15.9 31.0
Water S S S S S S S S S 31.6 31.6 12.0
Air (including truck and air) S S S S S S 25.9
Pipeline S S S S S S
Multiple modes S 38.3 S S S S S 37.8 S S 13.1 S
Parcel, USPS or courier S S S S S S S S S S 15.1 S
Truck and rail S 41.3 S S S S S 38.2 S 32.9 33.7 43.8
Other multiple modes S S S S S S S S S 31.6 29.6 1.2
Other and unknown modes 34.5 24.4 38.7 29.3 44.5 12.3 S 32.4 S S 24.0 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 12.5 19.3 15.2 25.3 7.7 23.0 31.0 7.6 28.1 25.1 34.5 26.6
Single modes 13.3 19.6 15.2 26.1 7.6 23.4 32.8 7.7 29.7 18.0 12.9 22.9
Truck 13.3 20.2 15.8 26.4 8.3 25.1 33.4 8.7 34.4 18.1 13.0 23.1
Rail 36.7 13.9 9.4 38.7 13.5 7.2 30.8 11.0 6.2 16.8 7.9 30.5
Water S S S S S S S S S 31.6 31.6 0.1
Air (including truck and air) S S S S S S S S S 29.8 S S
Pipeline S S S S S S S S S S
Multiple modes S 37.1 S S 22.4 S S 34.1 S 45.6 13.0 25.4
Parcel, USPS or courier S S S S S S S S S 33.1 12.5 18.9
Truck and rail S 35.4 S S 30.0 S S 34.8 S 29.9 S S
Other multiple modes S S S S S S S S S 30.3 S S
Other and unknown modes 33.4 21.8 124.8 38.0 44.2 136.5 46.0 S 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 14.0 20.0 21.1 27.6 16.8 34.8 17.4 12.4 16.5 S 18.5 S
Single modes 13.5 20.0 20.0 27.7 17.1 35.6 18.1 12.4 16.9 42.9 19.1 26.3
Truck 17.1 19.4 26.2 28.3 18.2 39.5 28.2 13.0 29.7 45.7 19.2 27.0
Rail 31.8 20.3 26.7 17.1 28.1 18.9 18.4 17.7 16.4 16.1 25.7 38.6
Water S S S S S S S 44.6 S 31.6 S S
Air (including truck and air) S S S S S S S S S 31.6 31.6 87.5
Pipeline S S S S S S
Multiple modes S 41.4 S S S S S S S 28.1 33.7 51.6
Parcel, USPS or courier S S S S 46.7 S S S S 28.9 33.2 51.2
Truck and rail S S S S S S S S S 29.9 31.8 67.4
Other multiple modes S S S S S S S S S S 31.6 S
Other and unknown modes S 28.9 S S 30.4 S S 34.8 S 33.6 20.7 26.6

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 18.3 7.4 26.0 16.2 9.2 22.5 16.2 19.7 29.6 30.4 26.7 50.8
Single modes 19.0 7.2 27.0 17.6 8.6 24.4 16.5 17.1 32.1 31.1 27.5 42.4
Truck 26.3 12.2 54.5 28.9 13.0 58.1 29.7 42.7 66.5 33.0 29.4 45.6
Rail 33.5 28.8 38.1 25.1 24.9 83.0 29.7 21.5 75.4 17.3 17.5 24.5
Water 22.1 13.6 15.5 21.8 12.1 14.2 S 17.5 S 31.7 24.4 27.9
Air (including truck and air) S S S S S S S S S 31.6 22.1 18.5
Pipeline 20.3 8.5 29.1 21.8 8.3 25.1 S S S S S S
Multiple modes S S S S S S S S S 41.5 22.8 47.4
Parcel, USPS or courier S S S S 44.9 S S S S 24.8 23.0 41.6
Truck and rail S S S S S S S S S 29.9 29.3 77.4
Other multiple modes S S S S S S S S S S 30.5 S
Other and unknown modes 26.5 20.9 15.8 31.5 29.5 27.5 S 20.4 S S 41.6 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 11.1 17.1 20.8 21.0 18.7 35.7 16.9 26.2 26.6 10.0 11.1 19.4
Single modes 8.3 18.0 18.5 21.1 19.3 37.6 17.6 26.5 27.3 20.4 11.5 39.9
Truck 11.3 15.2 19.4 22.9 22.4 34.9 11.7 37.1 27.0 19.4 9.6 30.1
Rail 15.3 33.4 24.6 17.4 28.8 38.2 24.5 28.5 38.7 5.2 4.5 4.9
Water 17.3 15.7 24.4 15.3 10.7 25.3 19.1 26.7 16.2 32.9 15.5 23.3
Air (including truck and air) 44.1 31.2 119.2 32.0 28.7 27.9 40.9 21.9 47.7 9.0 5.4 14.7
Pipeline 28.2 25.7 43.8 39.7 15.1 92.6 S S S S S S
Multiple modes 40.2 10.8 121.4 37.4 28.0 110.1 44.4 33.4 61.7 9.8 8.6 14.0
Parcel, USPS or courier 41.7 13.8 143.9 25.7 10.7 57.2 29.7 15.2 70.9 9.8 8.8 14.2
Truck and rail 30.7 35.8 14.7 37.0 45.8 9.1 32.9 43.3 6.2 17.4 4.9 13.9
Other multiple modes 29.4 S S 41.9 S S S S S 24.3 24.6 11.9
Other and unknown modes 31.5 24.3 28.5 S 24.2 S S 28.6 S S 16.8 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 11.7 19.7 18.7 20.4 12.0 25.4 19.1 5.0 22.8 11.5 11.5 20.7
Single modes 12.5 20.8 18.8 20.5 12.5 26.0 19.8 5.2 24.4 19.3 17.8 58.1
Truck 12.7 21.5 19.1 17.9 14.6 24.3 13.2 7.1 17.2 14.5 6.7 30.5
Rail 33.7 12.3 47.8 45.9 9.7 74.4 39.4 9.6 53.0 9.0 10.6 14.4
Water S S S S S S 31.6
Air (including truck and air) S 18.5 S S 25.8 S S 24.9 S 15.7 8.7 22.8
Pipeline S S S S S S S S S S
Multiple modes 16.2 18.9 21.1 19.6 17.3 16.5 23.4 21.2 19.4 7.2 10.0 12.9
Parcel, USPS or courier 16.3 19.5 21.8 19.2 11.9 16.2 19.9 15.0 16.4 7.2 10.0 12.8
Truck and rail 38.0 38.7 17.9 44.6 40.3 28.3 42.9 36.4 27.5 13.0 6.1 16.2
Other multiple modes S S S S 46.7 S S S S 30.6 27.1 36.8
Other and unknown modes 47.6 15.6 96.2 30.8 32.0 46.5 22.2 45.3 56.3 22.3 27.1 24.4

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 10.4 4.4 13.8 10.5 9.0 17.6 17.6 9.9 33.8 11.8 12.3 15.1
Single modes 10.9 6.0 15.5 10.5 9.1 18.0 17.6 10.3 35.5 23.4 14.3 25.7
Truck 10.7 6.1 15.5 10.7 9.6 18.3 18.2 10.2 36.4 23.1 13.8 24.9
Rail 28.9 14.5 28.9 19.2 14.3 31.4 20.4 16.6 33.4 10.6 9.1 13.5
Water S S S S S S S S S 31.6 29.9 48.4
Air (including truck and air) 31.1 19.6 42.9 42.2 24.0 53.6 42.2 20.7 47.2 8.2 5.5 15.5
Pipeline S S S S S S S S S S S S
Multiple modes 19.6 16.2 25.5 33.5 33.2 19.5 37.7 23.6 34.8 9.3 8.5 13.5
Parcel, USPS or courier 19.7 16.9 26.4 24.2 21.9 29.1 30.3 34.8 39.5 9.3 8.6 13.6
Truck and rail 34.7 19.5 39.2 49.2 39.5 19.4 46.9 30.3 49.1 17.8 47.5 138.7
Other multiple modes S S S S S S S S S S 39.5 S
Other and unknown modes 33.7 18.5 46.1 S 19.6 S 46.4 31.2 38.0 24.0 15.1 21.9

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 12.3 17.8 17.8 22.7 12.2 47.0 21.1 11.8 44.3 14.3 9.7 13.3
Single modes 12.5 22.3 20.2 24.8 13.0 51.0 22.9 12.8 48.1 29.8 15.0 24.0
Truck 16.4 23.5 20.3 26.8 14.0 54.3 28.4 13.3 51.6 49.8 20.3 21.3
Rail 38.7 40.2 665.5 35.9 S S 42.1 46.1 824.1 18.9 S S
Water S S S S S S 33.4
Air (including truck and air) 21.4 19.9 26.7 23.1 18.3 30.4 22.3 19.4 37.8 6.4 5.4 10.7
Pipeline S S S S S S S S S S
Multiple modes 24.6 24.3 25.2 46.7 14.4 39.8 44.1 17.8 51.1 5.5 6.2 8.5
Parcel, USPS or courier 24.8 24.5 25.4 48.2 13.4 40.7 49.1 16.9 54.0 5.5 6.2 8.5
Truck and rail S S S S S S S S S 29.8 31.6 52.9
Other multiple modes S S S S S S S S S 28.2 31.6 30.0
Other and unknown modes 46.9 11.6 115.5 S 13.9 S S 23.1 S 26.8 30.5 60.6

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 9.7 19.5 32.8 16.4 14.1 30.9 12.8 10.9 18.8 11.3 12.3 11.9
Single modes 11.5 21.9 35.6 16.8 14.8 33.2 13.2 11.5 20.0 17.5 10.8 21.8
Truck 11.8 18.1 34.7 17.0 15.6 36.8 13.2 13.4 25.4 15.6 10.0 21.6
Rail 45.7 14.3 42.7 S 18.5 S 41.6 18.2 15.3 S 36.6 S
Water
Air (including truck and air) S S S S 17.6 S S 19.6 S 16.5 4.9 26.9
Pipeline S S S S S S S S S S
Multiple modes 37.6 21.3 92.4 21.2 15.1 34.4 22.0 21.4 28.1 18.0 8.7 13.8
Parcel, USPS or courier 39.4 22.7 98.4 23.8 16.7 45.1 24.3 15.8 37.6 17.8 8.7 13.5
Truck and rail 39.6 S S S 35.5 S S 41.8 S 22.0 13.3 14.9
Other multiple modes S S S S S S S S S 28.2 30.1 36.4
Other and unknown modes 22.9 20.2 47.8 44.0 S S 30.2 27.0 32.6 S S 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 S 16.0 S S 28.3 S S 26.5 S S 11.7 S
Single modes S 20.5 S S 29.6 S S 27.0 S S 18.4 S
Truck 34.0 18.5 23.1 S 26.6 S S 25.1 S S 20.3 S
Rail S 42.1 S S 38.4 S S 49.5 S 30.5 22.9 13.9
Water S S S S S S 31.6
Air (including truck and air) S S S S 49.3 S S S S 28.0 16.2 29.8
Pipeline S S S S S S S S S S S S
Multiple modes 36.5 41.7 5.4 S S S S 26.2 S 22.7 18.9 18.0
Parcel, USPS or courier 36.5 43.3 5.7 S 32.5 S S 27.6 S 22.7 19.0 18.0
Truck and rail S S S S S S S S
Other multiple modes
Other and unknown modes S S S S S S S S S S 23.6 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.