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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 12.7 – 14.2 – 13.9 – 28.0
Single modes 14.3 3.8 18.8 6.8 16.4 4.6 36.9
Truck 14.7 4.5 19.2 6.6 15.5 4.7 13.0
Rail – – – – – – –
All other Single modes 44.6 1.1 S S S S 26.9
Multiple modes 23.6 3.1 26.3 7.1 14.9 4.7 41.6
Parcel, USPS or courier S S S S S S 32.2
All other multiple modes 29.6 3.5 26.3 7.1 15.0 4.8 S
Other and unknown modes 48.5 1.2 S S 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 39.1 – 38.1 – S S S
Single modes 36.4 9.6 48.9 9.7 S S S
Truck 37.3 11.5 49.5 12.7 S S 25.6
Rail – – – – – – –
All other Single modes S S S S S S 30.1
Multiple modes S S S S S S 29.4
Parcel, USPS or courier S S S S S S 41.3
All other multiple modes S S S S S S 31.2
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 29.1 – 30.7 – 41.8 – S
Single modes 33.0 11.7 40.6 12.4 S S 39.7
Truck 35.1 12.9 45.4 14.0 S S 21.3
Rail – – – – – – –
All other Single modes S S S S S S 29.1
Multiple modes 48.5 8.4 41.0 9.5 S S S
Parcel, USPS or courier – – – – – – –
All other multiple modes 48.5 8.4 41.0 9.5 S S S
Other and unknown modes S S S S S S 31.6

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 19.7 – 20.8 – 41.2 – S
Single modes 24.1 11.1 24.0 9.3 S S 7.2
Truck 24.1 11.1 24.0 9.3 S S 7.2
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes 47.5 11.4 44.1 9.6 S S 25.8
Parcel, USPS or courier – – – – – – –
All other multiple modes 47.5 11.4 44.1 9.6 S S 25.8
Other and unknown modes S S S S S S 31.6

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 22.0 – 19.6 – S S S
Single modes 22.5 4.3 20.7 4.5 21.7 19.2 19.1
Truck 22.5 4.3 20.7 4.5 21.7 19.2 19.1
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes 47.1 4.3 48.1 4.5 S S 26.4
Parcel, USPS or courier – – – – – – –
All other multiple modes 47.1 4.3 48.1 4.5 S S 26.4
Other and unknown modes S S S S S S 31.6

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 34.6 – 28.7 – S S 30.0
Single modes 35.3 5.3 29.7 8.0 S S 31.4
Truck 35.6 9.5 30.5 11.1 S S 22.2
Rail – – – – – – –
All other Single modes S S S S S S 30.9
Multiple modes 34.1 5.6 S S S S 31.2
Parcel, USPS or courier S S S S S S 31.1
All other multiple modes 41.5 5.9 S S S S 23.2
Other and unknown modes S S S S S S 34.0

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 43.8 – 27.8 – S S 35.5
Single modes 35.0 11.9 34.3 12.4 S S 38.2
Truck 33.7 14.6 36.2 13.1 S S 21.9
Rail – – – – – – –
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 34.1
Parcel, USPS or courier S S S S S S 30.1
All other multiple modes S S S S S S 49.9
Other and unknown modes S S S S 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 21.4 – 18.2 – S S 15.1
Single modes 23.2 4.4 18.3 8.2 23.1 19.8 11.3
Truck 22.7 4.5 18.3 8.2 23.1 19.8 9.0
Rail – – – – – – –
All other Single modes S S S S S S 31.6
Multiple modes 35.8 4.5 S S S S 17.4
Parcel, USPS or courier S S S S S S 32.1
All other multiple modes 35.8 4.5 S S S S 17.1
Other and unknown modes S S S S S S 31.6

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 S S S S S S 29.8
Single modes S S S S S S 30.4
Truck S S S S S S 30.4
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S 31.6
Parcel, USPS or courier S S S S S S 31.6
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 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 S S S S S S 45.2
Single modes S S S S S S 18.5
Truck S S S S S S 19.0
Rail – – – – – – –
All other Single modes S S S S S S 32.4
Multiple modes S S S S S S 35.3
Parcel, USPS or courier S S S S S S 34.6
All other multiple modes S S S S S S 22.9
Other and unknown modes S S S S S S 34.0

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 S
Single modes S S S S S S S
Truck S S S S S S S
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
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.