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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

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

Monday, July 2, 2012

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 10.9 – 13.3 – 7.8 – 28.2
Single modes 13.5 4.2 13.4 0.8 8.4 2.7 37.7
Truck 15.1 5.5 13.4 1.7 9.4 3.6 37.1
Rail S S S S S S 31.4
All other Single modes S S S S S S 14.1
Multiple modes 19.5 4.0 S S 35.6 1.3 15.9
Parcel, USPS or courier 19.9 4.0 21.2 0.2 27.0 0.7 15.9
All other multiple modes S S S S S S 32.6
Other and unknown modes 30.8 0.7 45.6 0.8 S S 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 46.6 – 36.8 – S S 46.1
Single modes 46.9 9.1 38.2 6.3 S S 37.1
Truck 47.3 9.5 43.3 8.5 42.4 16.7 30.8
Rail S S S S S S 31.2
All other Single modes – – – – – – –
Multiple modes S S S S S S 31.6
Parcel, USPS or courier – – – – – – –
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 31.6

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 38.0 – 21.5 – 26.3 – 45.0
Single modes 40.4 4.9 22.3 4.2 24.6 4.5 34.9
Truck 40.4 4.9 22.3 4.2 24.6 4.5 34.9
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S S
Parcel, USPS or courier S S S S S S 31.6
All other multiple modes S S S S S S 28.1
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 24.3 – 23.1 – 25.0 – 13.2
Single modes 24.1 0.4 23.1 0.1 25.0 – 13.3
Truck 24.1 0.4 23.1 0.1 25.0 – 13.3
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 31.5

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 41.2 – 41.2 – 45.4 – 23.1
Single modes S S S S S S 24.9
Truck S S S S S S 30.2
Rail – – – – – – –
All other Single modes S S S S S S 28.5
Multiple modes S S S S S S 31.6
Parcel, USPS or courier – – – – – – –
All other multiple modes S S S S S S 31.6
Other and unknown modes – – – – – – –

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 26.3 – 32.0 – 19.7 – 19.2
Single modes S S 32.7 1.4 20.2 1.2 32.9
Truck S S 32.7 1.4 20.2 1.2 32.9
Rail – – – – – – –
All other Single modes S S S S S S S
Multiple modes 29.9 11.3 28.5 1.1 29.5 0.8 19.5
Parcel, USPS or courier 29.9 11.3 28.5 1.1 29.5 0.8 19.5
All other multiple modes – – – – – – –
Other and unknown modes S S 41.5 0.6 43.5 0.5 27.2

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 12.8 – 22.1 – 34.0 – 22.1
Single modes 16.9 7.0 23.3 2.1 36.0 4.5 34.5
Truck 16.9 7.0 23.6 2.3 36.0 4.5 26.0
Rail S S S S S S 31.6
All other Single modes S S S S 48.1 0.2 23.7
Multiple modes 45.6 6.8 30.2 0.9 S S 12.5
Parcel, USPS or courier 45.6 6.8 30.2 0.9 S S 12.5
All other multiple modes – – – – – – –
Other and unknown modes 26.3 1.1 32.2 1.7 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 17.6 – S S 41.2 – 26.0
Single modes 22.4 7.6 S S 43.2 3.5 S
Truck 22.8 7.5 S S 43.5 3.6 S
Rail – – – – – – –
All other Single modes S S S S 46.5 1.3 17.2
Multiple modes 38.2 7.8 S S S S 21.3
Parcel, USPS or courier 38.2 7.8 S S S S 17.6
All other multiple modes S S S S S S 31.6
Other and unknown modes 32.0 2.6 S S 40.3 1.3 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 31.7 – S S 35.7 – S
Single modes 34.6 9.9 S S 32.9 5.6 S
Truck 41.3 10.8 S S 33.1 5.8 S
Rail – – – – – – –
All other Single modes S S S S S S 19.7
Multiple modes 37.4 9.9 28.3 7.4 26.2 4.9 27.6
Parcel, USPS or courier 37.2 9.8 29.4 7.3 26.9 4.9 28.3
All other multiple modes S S S S S S 31.3
Other and unknown modes S S 49.4 4.1 S S S

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 21.3 – 17.9 – 26.2 – S
Single modes 21.8 0.9 18.0 0.3 26.5 0.6 S
Truck 20.9 0.9 18.0 0.3 26.6 0.6 S
Rail – – – – – – –
All other Single modes S S S S S S 23.7
Multiple modes 34.0 0.5 40.6 – 44.8 0.5 S
Parcel, USPS or courier 34.0 0.5 40.6 – 44.8 0.5 S
All other multiple modes – – – – – – –
Other and unknown modes S S 45.8 0.3 44.3 0.3 29.0

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 37.2
Single modes S S S S S S 36.8
Truck S S S S S S 36.8
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S S
Parcel, USPS or courier S S S S S S S
All other multiple modes – – – – – – –
Other and unknown modes – – – – – – –

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.