Table B-6. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for CBSA of Origin: 2002

Table B-6. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for CBSA of Origin: 2002

[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 CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 11.2 19.2 S S 48.8
Single modes 14.5 3.7 16.5 3.8 27.9 14.5 20.7
Truck 14.5 4.3 19.4 8.2 12.2 5.6 6.3
Rail
All other Single modes 27.1 5.3 20.2 7.5 35.6 12.1 19.9
Multiple modes 15.2 2.9 49.2 3.9 S S 21.0
Parcel, USPS or courier 31.9 2.8 21.0 26.5 1.0 17.4
All other multiple modes 16.1 0.9 49.6 3.9 S S 33.3
Other and unknown modes 23.0 1.4 40.4 1.9 37.8 1.4 S

SCTG 01-05, Agriculture products and fish

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 49.0 S S S S 28.9
Single modes S S S S S S S
Truck S S S S S S 19.1
Rail
All other Single modes S S S S S S S
Multiple modes S S S S S S 33.7
Parcel, USPS or courier S S S S S S 39.3
All other multiple modes S S S S S S 33.9
Other and unknown modes S S S S S S 26.9

SCTG 06-09, Grains, alcohol, and tobacco products

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 11.9 16.9 28.5 S
Single modes 10.8 4.4 19.9 4.9 38.6 12.1 12.6
Truck 10.2 4.8 20.6 5.8 20.3 2.9 6.6
Rail
All other Single modes 25.6 3.5 46.6 7.3 43.1 11.8 S
Multiple modes 33.5 3.1 29.5 4.1 S S S
Parcel, USPS or courier S S S S S S S
All other multiple modes 34.2 2.6 29.9 4.1 S S S
Other and unknown modes S S S S S S S

SCTG 10-14, Stones, non-metallic minerals, and metallic ores

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 28.4 31.9 34.1 15.0
Single modes 22.5 6.3 28.3 6.9 30.8 6.7 13.0
Truck 22.5 6.3 28.3 6.9 30.8 6.7 13.1
Rail
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 27.8
Parcel, USPS or courier S S S S S S 31.6
All other multiple modes S S S S S S 26.7
Other and unknown modes S S S S S S 27.4

SCTG 15-19, Coal and petroleum products

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 32.8 26.2 30.0 S
Single modes 33.8 10.0 26.1 9.8 45.8 10.0 S
Truck S S S S 41.4 10.2 S
Rail
All other Single modes 22.3 11.3 20.4 11.4 48.8 9.9 27.4
Multiple modes 39.0 10.1 39.9 9.9 35.8 10.0 30.6
Parcel, USPS or courier
All other multiple modes 39.0 10.1 39.9 9.9 35.8 10.0 30.6
Other and unknown modes S S S S S S 47.2

SCTG 20-24, Pharmaceutical and chemical products

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 24.3 24.8 22.6 48.9
Single modes 22.3 10.3 29.0 7.4 19.2 7.3 41.7
Truck 22.4 8.4 30.4 7.3 28.8 7.9 7.5
Rail
All other Single modes 42.6 3.2 36.9 1.4 36.1 4.3 S
Multiple modes 45.0 9.5 33.5 3.8 35.5 7.6 S
Parcel, USPS or courier 49.1 9.8 36.3 2.3 30.4 6.4 S
All other multiple modes 30.5 1.2 37.4 2.1 48.7 7.4 34.6
Other and unknown modes S S 49.1 7.5 S S 45.6

SCTG 25-30, Logs, wood products, and textile and leather

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 13.3 19.3 19.3 29.3
Single modes 14.1 3.4 22.8 4.7 19.8 4.3 43.7
Truck 13.6 3.8 23.3 5.5 33.3 3.9 10.0
Rail
All other Single modes 30.5 1.0 22.6 0.8 29.3 4.7 22.4
Multiple modes 20.9 2.7 12.8 2.4 17.9 5.0 21.5
Parcel, USPS or courier 28.1 3.2 35.9 2.2 43.3 4.9 20.6
All other multiple modes 16.8 1.2 23.2 2.2 14.2 7.4 21.4
Other and unknown modes 32.4 2.7 40.5 2.9 S S S

SCTG 31-34, Base metal and machinery

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 15.3 16.3 15.5 29.1
Single modes 17.3 4.1 17.9 5.5 14.1 7.5 26.6
Truck 14.8 4.8 18.0 5.7 19.4 9.2 10.9
Rail
All other Single modes S S 29.3 0.3 46.9 5.9 47.9
Multiple modes 30.6 2.3 33.4 0.9 33.7 6.6 35.0
Parcel, USPS or courier 30.5 0.4 28.2 S S 37.7
All other multiple modes 32.9 2.3 33.6 0.9 32.6 6.3 S
Other and unknown modes 31.5 3.7 49.3 5.3 S S S

SCTG 35-38, Electronic, motorized vehicles, and precision instruments

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 42.2 49.9 S S 27.7
Single modes 48.5 7.5 S S S S 43.8
Truck 24.4 11.3 21.4 13.8 25.9 7.1 10.5
Rail
All other Single modes S S S S S S 17.4
Multiple modes 34.6 4.7 29.1 4.9 33.2 13.5 38.5
Parcel, USPS or courier S S S S S S 36.7
All other multiple modes 26.5 4.1 34.7 4.8 24.6 12.0 S
Other and unknown modes 42.9 3.8 S S S S 30.7

SCTG 39-43, Furniture, mixed freight and misc manufactured products

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 32.8 36.7 30.2 32.0
Single modes 38.0 5.6 37.7 6.7 49.1 9.7 49.3
Truck 30.1 3.8 39.2 6.3 46.3 3.6 9.1
Rail
All other Single modes S S S S S S 34.7
Multiple modes 23.7 3.7 47.9 3.0 44.0 9.4 40.4
Parcel, USPS or courier 20.4 3.4 31.3 1.6 S S S
All other multiple modes 38.5 2.2 S S 49.4 10.7 11.6
Other and unknown modes 15.5 2.1 49.7 5.8 S S S

Commodity Unknown

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes S S S S S S S
Single modes S S S S S S 38.2
Truck S S S S S S 21.1
Rail
All other Single modes S S S S S S 29.8
Multiple modes S S S S S S 32.4
Parcel, USPS or courier S S S S S S 32.4
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 31.6

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, Metropolitan Data, December 2004.