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 16.2 4.6 25.4 9.4 13.9 15.6 14.7 15.9 21.3 9.0 11.8 33.0
Single modes 18.6 5.9 33.3 9.4 14.5 16.7 15.5 14.1 24.4 13.8 10.9 33.1
Truck 20.5 6.9 37.9 6.2 17.5 17.3 17.8 5.2 30.9 16.2 11.0 35.3
Rail 14.8 12.7 24.0 23.1 20.4 36.3 23.6 22.5 40.8 14.9 3.1 13.7
Water S 22.7 S 30.3 12.6 22.6 23.8 15.6 16.3 14.2 12.8 15.9
Air (including truck and air) 43.8 18.5 85.4 22.3 24.4 27.5 24.2 16.0 25.9 6.4 5.7 10.6
Pipeline 34.5 S S 34.0 S S S S S S S S
Multiple modes 20.3 21.0 33.6 30.6 29.5 7.0 34.2 35.5 9.2 6.9 11.1 18.4
Parcel, USPS or courier 22.3 11.5 81.6 19.2 S S 20.9 10.9 78.8 6.9 11.7 19.6
Truck and rail 18.9 33.6 1.8 43.9 27.5 38.7 46.9 28.2 55.7 7.7 8.6 19.6
Other multiple modes S 41.9 S S 33.9 S S 39.9 S 37.2 S S
Other and unknown modes 24.7 33.6 8.0 S 25.7 S S 20.2 S S 47.8 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 20.2 21.1 23.0 37.1 18.3 28.4 48.0 28.4 53.7 39.4 S S
Single modes 20.2 20.2 22.7 37.6 18.2 29.2 48.6 28.7 54.3 S S S
Truck 26.2 21.1 27.3 38.8 15.3 20.7 40.9 13.1 55.3 S S S
Rail 43.8 32.0 4.4 42.9 32.1 0.2 40.9 33.3 0.4 27.9 17.6 61.5
Water 49.1 38.2 60.2 S 36.0 S S 35.9 S 19.2 21.2 25.3
Air (including truck and air) S S S S S S S S S 29.6 30.3 210.1
Pipeline S S S S S S
Multiple modes S S S S S S S S S 27.8 S S
Parcel, USPS or courier S S S S S S S S S 27.8 S S
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S 22.9 S S 46.6 S S 27.6 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 10.0 18.6 13.5 13.0 12.2 16.5 15.1 20.8 22.7 33.3 16.2 92.4
Single modes 10.3 19.2 14.0 12.9 12.3 16.7 15.0 20.5 23.2 33.7 16.9 90.9
Truck 11.0 20.3 15.0 16.1 13.0 21.4 12.3 19.4 27.0 33.8 16.8 91.9
Rail S 24.1 S S 45.2 S S 40.2 S 36.9 21.8 42.3
Water S S S S S S S S S 29.8 28.3 46.1
Air (including truck and air) S 35.3 S S 35.0 S S 40.5 S 28.6 20.7 39.2
Pipeline S S S S S S
Multiple modes 41.1 38.7 28.7 S 37.9 S 42.1 40.7 17.3 23.5 17.5 40.8
Parcel, USPS or courier S S S S 36.8 S S 46.7 S 27.2 11.8 24.2
Truck and rail S 37.0 S S 39.6 S 49.1 44.3 18.7 27.4 13.9 22.4
Other multiple modes S S S S S S S S S 28.4 29.8 61.8
Other and unknown modes S 42.4 S S 44.3 S S S S 28.2 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 16.7 25.6 22.3 14.5 32.0 27.6 38.2 28.8 30.9 29.2 36.6 67.9
Single modes 16.8 26.1 22.6 14.6 33.1 28.5 38.2 29.6 32.6 29.1 30.1 61.7
Truck 16.5 29.3 25.7 10.7 39.1 33.4 30.4 37.0 51.8 31.0 22.8 67.2
Rail 48.2 S S 46.2 46.8 82.2 S 45.9 S 26.5 20.9 22.0
Water S 29.7 S S 27.7 S S 30.2 S 24.1 13.0 22.5
Air (including truck and air) S S S S S S S S S 31.6 31.6 93.2
Pipeline S S S S S S
Multiple modes S 43.2 S S 41.5 S S S S 30.6 47.2 120.8
Parcel, USPS or courier S S S S S S S S S 31.6 42.2 187.9
Truck and rail S S S S S S S S S 31.6 29.8 24.7
Other multiple modes S 39.4 S S 41.8 S S S S 31.6 31.2 1.5
Other and unknown modes 36.2 33.3 66.5 41.4 45.8 47.7 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 19.3 10.3 26.4 16.3 16.0 20.7 23.5 23.3 29.7 37.7 21.1 20.3
Single modes 19.7 11.7 30.0 17.8 18.3 24.4 25.0 21.2 37.2 36.1 19.1 32.2
Truck 23.7 12.8 36.0 21.6 28.5 27.3 S 30.0 S 19.6 15.3 19.9
Rail 25.0 21.5 44.9 25.4 22.4 41.1 26.4 25.4 47.9 20.9 8.8 16.5
Water S 33.6 S S 21.4 S S 33.1 S 30.5 16.4 10.9
Air (including truck and air) S S S S S S 30.6
Pipeline S S S S S S S S S S
Multiple modes 47.0 45.5 6.7 47.7 34.0 6.8 46.7 40.1 8.8 S 29.4 S
Parcel, USPS or courier S S S S 41.5 S S 38.9 S 33.2 35.2 26.6
Truck and rail S 43.3 S S S S S S S 28.1 S S
Other multiple modes S 46.3 S S 34.9 S S 40.4 S 31.1 27.9 40.8
Other and unknown modes S 28.5 S S 29.9 S S 42.1 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 11.6 38.9 18.4 9.1 34.1 19.2 10.5 34.9 13.5 6.5 26.6
Single modes 19.9 13.0 43.9 18.7 9.3 35.0 19.6 10.4 36.2 19.3 10.0 34.9
Truck 21.2 13.8 45.9 19.5 9.7 36.6 20.9 12.1 40.0 21.5 9.4 36.7
Rail 36.9 16.6 79.2 40.4 20.5 52.5 40.6 20.2 56.3 30.0 8.1 35.1
Water S S S S S S S S S 31.6 31.6 173.1
Air (including truck and air) 41.3 23.3 172.0 48.6 S S 35.9 41.8 16.1 17.9 15.1 31.0
Pipeline 41.6 41.1 S S S S S S
Multiple modes 28.5 45.8 162.0 22.5 29.7 55.5 27.1 45.5 30.3 11.6 16.9 26.9
Parcel, USPS or courier 28.9 S S 31.0 32.1 121.6 31.5 19.5 124.6 11.6 16.6 26.7
Truck and rail S S S S 48.3 S S 49.5 S 31.6 20.2 18.7
Other multiple modes S S S S S S S S S 31.6 31.6 15.8
Other and unknown modes 31.4 16.6 14.4 S 15.5 S 44.5 29.8 28.7 44.0 34.0 174.2

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 25.0 6.2 45.9 19.7 13.8 31.8 17.0 7.1 31.7 8.8 13.6 37.3
Single modes 26.2 6.6 46.3 20.0 13.9 32.2 16.4 7.4 31.8 12.8 19.8 41.6
Truck 27.7 6.9 48.1 13.1 15.5 22.5 10.8 11.4 24.4 11.2 21.1 35.0
Rail 33.4 13.0 100.0 48.8 15.2 215.8 45.7 16.2 131.4 38.3 10.9 25.3
Water
Air (including truck and air) S 41.9 S 41.0 31.2 54.9 47.2 29.0 54.4 13.3 4.5 15.8
Pipeline S S S S S S S S S S
Multiple modes 21.7 26.7 120.2 39.6 23.2 97.9 41.8 36.0 82.8 7.4 5.3 12.5
Parcel, USPS or courier 22.2 29.5 137.9 18.9 21.9 93.5 20.2 26.5 137.8 7.4 5.5 12.7
Truck and rail S 35.4 S S 36.1 S S 42.6 S 25.9 24.0 29.0
Other multiple modes S S S S S S 31.6
Other and unknown modes 32.7 20.5 37.3 S 25.2 S S 36.1 S 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 48.4 5.9 136.7 24.2 13.3 31.9 35.4 7.3 66.6 11.9 9.2 20.7
Single modes S 5.2 S 24.1 13.6 32.8 35.0 6.9 70.4 17.2 10.9 30.3
Truck S 6.0 S 28.1 17.3 40.7 43.7 7.5 103.1 17.5 10.1 33.1
Rail 49.9 32.4 90.6 40.6 22.6 41.3 38.6 22.7 47.3 22.5 13.1 34.3
Water 41.2 42.3 62.1 42.7 30.5 48.3 S 46.0 S 35.4 S S
Air (including truck and air) S 21.2 S 42.9 25.6 35.8 49.6 26.2 47.8 7.2 8.1 11.5
Pipeline S S S S S S
Multiple modes 36.8 20.2 93.9 44.8 22.5 30.3 S 28.0 S 8.3 13.8 17.2
Parcel, USPS or courier 41.2 25.8 117.3 21.2 12.1 80.4 21.4 12.2 80.0 8.4 13.8 17.3
Truck and rail 49.5 29.5 18.8 S 38.2 S S 30.3 S 21.1 14.8 34.7
Other multiple modes S S S S S S S S S 30.0 38.1 35.9
Other and unknown modes 28.7 22.4 23.4 31.5 30.8 12.4 38.8 26.3 8.8 S 39.4 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 26.4 9.2 29.7 23.5 11.4 32.9 17.8 14.6 20.7 10.8 16.9 40.3
Single modes 33.3 11.9 55.4 25.1 10.5 49.9 19.2 13.3 31.3 20.4 17.5 61.4
Truck 33.9 12.7 57.8 25.6 11.0 51.1 20.0 13.6 32.2 17.2 17.1 50.0
Rail 45.3 S S S 49.9 S 48.2 S S 29.3 S S
Water
Air (including truck and air) 41.1 23.7 37.7 S 41.9 S 36.6 45.5 62.6 14.4 5.6 20.2
Pipeline S S S S S S S S S S S S
Multiple modes 46.8 30.5 34.5 33.7 39.4 7.2 27.2 41.5 5.3 11.9 12.4 18.1
Parcel, USPS or courier 46.7 19.8 207.4 37.0 27.7 165.5 35.6 26.4 139.9 12.0 15.1 21.2
Truck and rail S 35.8 S S 41.0 S S 42.8 S 27.9 15.4 77.6
Other multiple modes S S S S S S S S S 31.6 31.6 S
Other and unknown modes S 41.4 S S 40.5 S S S S 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 17.8 11.5 56.3 17.7 21.3 38.2 17.2 30.7 43.0 12.7 11.3 26.3
Single modes 17.8 12.8 58.6 17.9 22.3 37.9 18.5 32.8 39.2 18.8 17.5 45.8
Truck 17.7 13.0 62.0 17.1 20.0 48.7 18.4 14.3 41.8 18.5 19.0 45.7
Rail 30.2 S S 44.8 S S S S S 25.7 16.7 24.7
Water S 38.3 S S 38.3 S S 42.0 S 29.0 27.9 19.8
Air (including truck and air) S S S S 41.9 S S 48.3 S 18.7 9.1 24.8
Pipeline S S S S S S
Multiple modes 33.4 16.3 112.2 27.6 30.0 553.8 24.2 33.2 602.2 8.8 9.7 17.6
Parcel, USPS or courier 35.1 16.5 113.9 42.4 18.2 137.5 44.2 19.0 166.6 8.9 9.7 17.7
Truck and rail S S S S S S S S S 23.6 31.6 109.1
Other multiple modes 40.0 39.8 43.4 25.9
Other and unknown modes 46.2 38.6 75.9 S S S S S S S 39.7 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 32.7 39.9 105.4 S 32.8 S 33.9 S S S 29.0 S
Single modes 39.1 35.8 142.3 S 33.0 S 39.2 S S S 34.4 S
Truck 39.2 36.4 145.0 S 33.0 S 39.2 S S S 30.8 S
Rail S S S S S S 31.6
Water
Air (including truck and air) S S S S S S 29.9
Pipeline S S S S S S
Multiple modes S S S 30.1 S S 41.1 S S 30.1 41.8 57.7
Parcel, USPS or courier S S S 30.1 S S 41.1 S S 30.1 33.3 51.6
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S S S S 48.4 S S S S 33.6 46.4 46.4

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.