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 5.2 3.8 7.9 9.1 12.7 15.4 14.0 5.4 22.8 9.5 4.7 12.6
Single modes 3.9 4.1 6.7 9.1 13.1 15.2 15.1 5.1 24.1 8.0 11.0 13.5
Truck 4.2 4.5 7.3 11.3 14.2 14.7 7.8 5.3 9.9 8.3 10.2 14.3
Rail 26.5 12.3 31.8 25.0 13.3 72.7 15.5 12.1 58.9 7.7 6.4 11.0
Water S 31.7 S S 34.7 S S S S 33.3 31.3 37.2
Air (including truck and air) 15.7 13.2 13.5 41.6 17.9 44.4 37.8 19.0 49.1 9.0 7.7 11.6
Pipeline S 42.4 S S 44.8 S S S S S S S
Multiple modes 18.6 6.4 29.9 13.9 14.6 39.2 16.9 8.8 44.6 4.2 3.8 6.0
Parcel, USPS or courier 18.3 6.9 23.3 16.8 6.8 20.3 20.0 7.0 26.8 4.4 3.8 6.1
Truck and rail S 13.2 S 24.2 34.0 121.9 25.5 14.6 96.9 6.7 11.3 13.9
Other multiple modes 45.9 44.9 104.2 45.6 49.3 61.4 S S S 32.8 24.1 14.1
Other and unknown modes 23.4 12.0 35.5 36.9 16.1 114.1 30.2 35.6 49.0 S 20.6 S

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 16.0 8.4 21.3 33.7 12.9 82.1 S 21.9 S 35.2 25.4 26.6
Single modes 16.6 9.1 23.6 33.7 12.4 86.4 S 23.5 S 42.9 14.3 50.1
Truck 20.0 10.2 23.5 33.1 13.5 60.6 45.2 20.9 65.7 45.0 14.9 51.1
Rail S 42.7 S S 40.5 S S 35.0 S 21.9 21.9 47.6
Water S 31.7 S S 34.7 S S S S 29.2 27.6 43.0
Air (including truck and air) S 47.4 S S S S S S S 30.3 25.8 57.8
Pipeline S S S S S S
Multiple modes S 35.2 S S S S S S S 21.5 13.6 20.2
Parcel, USPS or courier S 40.6 S S 43.6 S S 47.2 S 21.5 13.3 20.0
Truck and rail S S S S S S S S
Other multiple modes
Other and unknown modes S 21.2 S S 45.2 S S S S 34.4 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 10.0 3.4 13.1 17.6 7.5 23.9 23.3 10.8 28.8 30.3 24.1 28.5
Single modes 10.5 3.7 13.9 17.6 7.7 24.4 23.8 11.6 30.8 34.2 17.6 26.7
Truck 10.5 3.5 14.1 17.8 7.0 26.1 24.1 8.2 35.9 34.9 17.7 27.1
Rail 39.4 30.4 1.7 38.6 37.6 2.5 40.0 42.8 3.0 34.7 14.7 22.5
Water
Air (including truck and air) S S S S S S S S S 26.9 S S
Pipeline S S S S S S
Multiple modes 34.2 28.7 59.4 42.4 26.7 19.6 38.6 27.0 14.9 14.2 11.2 15.8
Parcel, USPS or courier S 35.5 S 44.9 32.9 68.9 49.5 38.1 72.2 17.3 11.9 18.3
Truck and rail 43.4 26.8 53.3 S 27.3 S 46.7 27.3 15.0 17.5 7.6 19.7
Other multiple modes S S S S S S 31.6
Other and unknown modes 36.6 36.7 17.7 45.9 33.1 17.0 44.7 35.7 12.3 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 25.4 16.8 30.8 11.5 27.8 22.4 30.9 26.3 125.4 37.4 22.2 96.1
Single modes 27.3 17.1 30.4 12.2 28.1 21.5 31.3 26.7 123.2 41.9 23.9 114.1
Truck 29.9 14.0 29.1 17.8 29.1 17.5 30.1 34.9 27.0 31.5 25.0 52.5
Rail 28.1 43.5 63.3 33.1 36.9 235.6 33.8 27.4 412.0 18.6 27.3 69.9
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S 27.7 S S
Parcel, USPS or courier S S S S S S S S S 27.7 28.3 43.0
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S 31.6
Other and unknown modes 37.5 40.0 382.1 40.6 S S 48.4 S S 35.5 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 24.6 36.2 17.5 24.9 35.1 16.5 27.7 32.4 82.7 35.6 16.9 127.0
Single modes 24.4 36.2 17.3 24.6 35.1 16.3 26.8 32.4 79.1 34.6 18.1 123.7
Truck 27.6 38.5 17.1 29.7 38.2 14.5 37.5 42.4 41.1 40.2 17.8 116.9
Rail 35.4 42.8 353.5 35.3 34.9 482.3 33.6 41.8 543.3 24.7 25.4 35.0
Water
Air (including truck and air) S S S S S S S S S 31.6 31.6 382.2
Pipeline S S S S S S S S S S
Multiple modes S 44.5 S S 39.4 S S 48.9 S 33.0 43.0 125.5
Parcel, USPS or courier S 44.5 S S 39.4 S S 48.9 S 30.2 43.0 116.0
Truck and rail S S S S S S 30.0
Other multiple modes
Other and unknown modes S 37.3 S S S S S S S S 22.2 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 12.2 8.3 16.0 30.2 11.1 68.6 24.6 11.5 65.4 11.5 13.9 12.4
Single modes 12.4 12.0 19.8 31.2 11.6 69.7 25.9 11.8 60.5 17.0 21.9 26.5
Truck 13.4 11.9 20.1 34.1 12.7 74.5 29.6 13.2 70.9 15.3 17.3 29.3
Rail S 31.9 S S 31.6 S S 28.3 S 26.1 18.2 18.0
Water S S S S S S 31.6
Air (including truck and air) 47.6 36.9 121.2 40.7 32.2 45.7 S 34.9 S 8.9 9.4 10.1
Pipeline S S S S S S
Multiple modes 19.0 19.1 23.2 41.7 20.0 284.5 43.0 28.6 555.9 14.9 10.5 14.4
Parcel, USPS or courier 18.9 19.6 15.1 19.2 22.0 13.8 25.5 25.5 20.0 15.9 10.5 14.8
Truck and rail 43.7 49.7 763.1 44.4 43.3 S 44.4 49.2 S 21.5 41.8 76.5
Other multiple modes S S S S S S S S S 49.9 31.6 31.1
Other and unknown modes 44.1 31.3 20.5 44.0 19.9 15.4 S 32.9 S S 31.5 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 8.1 6.2 12.6 10.9 11.6 13.1 10.0 14.6 12.5 6.5 4.8 9.4
Single modes 5.7 7.9 10.9 11.6 11.7 13.2 10.7 14.9 12.2 12.5 12.6 17.7
Truck 5.7 8.2 11.8 12.5 12.8 15.5 11.4 16.8 14.6 9.3 10.0 13.7
Rail 20.0 12.9 12.0 18.6 17.6 10.7 13.7 16.8 8.9 14.0 10.6 20.8
Water
Air (including truck and air) S 20.6 S S 25.2 S 48.4 32.9 131.9 20.1 14.2 19.1
Pipeline S S S S S S S S S S
Multiple modes 33.8 8.4 73.1 43.1 18.4 83.2 44.1 22.9 93.7 3.1 2.9 4.3
Parcel, USPS or courier 35.5 9.7 81.5 34.4 11.3 57.2 37.2 12.9 74.7 3.2 2.9 4.4
Truck and rail 37.1 22.5 41.8 S 34.3 S S 31.6 S 13.4 8.3 18.0
Other multiple modes S S S S S S S S S 39.0 31.6 17.4
Other and unknown modes S 33.8 S S 33.9 S 38.6 35.5 146.5 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 9.5 4.2 9.6 49.9 11.9 44.7 10.8 15.7 16.2 18.5 11.0 16.1
Single modes 8.8 4.0 8.8 S 12.4 S 12.0 16.3 17.7 29.6 11.5 26.3
Truck 9.0 4.2 8.9 S 12.6 S 13.2 9.5 16.2 30.7 11.0 30.8
Rail 23.9 34.3 57.9 21.3 48.7 21.1 26.4 S S 17.6 16.4 21.9
Water S S S S S S 31.6
Air (including truck and air) S 14.7 S S 35.9 S S 41.6 S 6.3 6.1 9.5
Pipeline S S S S S S
Multiple modes 19.5 9.4 20.7 27.8 12.5 26.4 27.7 24.8 23.1 9.3 11.3 13.6
Parcel, USPS or courier 19.1 10.6 21.3 18.4 15.6 14.4 21.5 18.3 20.2 9.4 11.3 13.6
Truck and rail S 25.5 S S 30.1 S 38.4 31.7 19.2 27.3 11.3 16.6
Other multiple modes S S S S S S S S S 30.0 28.4 22.9
Other and unknown modes 37.7 30.3 64.1 37.0 41.6 37.9 44.6 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 24.2 11.1 30.5 39.5 13.1 69.8 20.7 15.7 33.5 15.0 15.3 21.7
Single modes 16.8 10.8 20.3 14.7 13.3 17.5 12.8 16.4 20.1 19.7 45.7 73.8
Truck 17.9 13.4 23.9 14.9 13.8 18.2 13.1 18.2 22.1 20.5 S S
Rail S 29.4 S 49.4 30.9 29.5 S 30.5 S 22.8 20.7 48.4
Water
Air (including truck and air) 13.6 19.6 9.9 24.0 33.8 26.1 28.7 20.9 31.1 10.5 7.1 14.3
Pipeline S S S S S S S S S S
Multiple modes S 21.8 S S 27.7 S S 30.7 S 7.6 8.7 12.4
Parcel, USPS or courier 29.7 21.9 24.6 43.9 29.0 48.6 47.0 33.5 61.5 7.6 8.7 12.3
Truck and rail S 44.8 S S 47.5 S S 42.4 S 24.7 21.4 28.0
Other multiple modes S S S S S S S S S 31.6 31.6 18.4
Other and unknown modes 38.4 25.4 73.3 S 27.0 S S 28.5 S S 38.7 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 5.8 6.4 20.7 15.1 10.7 27.9 10.8 15.1 21.5 7.5 7.7 10.9
Single modes 5.2 6.1 19.1 15.6 11.0 28.3 12.2 15.1 21.5 12.1 14.1 13.6
Truck 5.2 5.9 19.2 15.7 10.6 30.6 12.7 15.3 23.8 12.9 15.2 13.6
Rail 37.1 24.6 10.9 35.3 16.7 18.2 43.4 20.4 17.9 26.6 17.6 75.2
Water S S S S S S S S S S 31.6 S
Air (including truck and air) 26.9 35.2 108.3 26.4 26.8 50.0 41.0 31.8 95.1 10.8 14.8 25.8
Pipeline S S S S S S
Multiple modes 24.9 18.2 68.7 22.9 19.9 57.1 22.9 21.7 56.2 5.1 3.7 6.1
Parcel, USPS or courier 26.4 18.4 70.4 28.8 21.8 66.0 30.7 26.3 70.3 5.1 3.7 6.1
Truck and rail S 31.5 S S 37.3 S S 35.7 S 28.7 21.7 36.7
Other multiple modes S S S S S S 31.6
Other and unknown modes 46.1 19.4 203.3 S 20.0 S 39.0 21.0 206.2 37.7 21.3 30.2

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 41.6 35.2 49.4 46.6 S S 48.3 39.4 21.9 35.6 22.9 20.0
Single modes 40.7 35.5 38.1 47.8 S S S 37.7 S 28.9 28.4 41.9
Truck 43.0 35.8 38.4 47.8 S S S 35.1 S 31.6 28.6 40.3
Rail S S S S S S 31.6
Water
Air (including truck and air) S S S S S S S S S 29.8 31.5 76.9
Pipeline S S S S S S
Multiple modes S 49.8 S S S S S S S 39.7 25.7 15.8
Parcel, USPS or courier S S S S 31.6 S S 31.0 S 39.7 25.6 15.8
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 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.