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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 7.5 – 20.9 – 19.0 – 9.4
Single modes 7.4 2.6 19.6 6.1 17.4 1.2 14.6
Truck 7.9 2.5 28.2 5.9 26.2 8.4 11.4
Rail 29.8 1.4 21.1 9.9 23.3 8.5 11.0
All other Single modes S S 42.4 0.7 S S 7.0
Multiple modes 18.1 2.6 S S S S 12.1
Parcel, USPS or courier 17.0 2.6 33.4 – 27.8 – 12.1
All other multiple modes S S S S S S 27.6
Other and unknown modes 23.9 0.5 45.3 6.0 36.5 0.6 31.5

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 S S S S S S 26.9
Single modes S S S S S S 26.9
Truck S S S S S S 26.9
Rail S S S S S S 31.6
All other Single modes – – – – – – –
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
All other multiple modes – – – – – – –
Other and unknown modes – – – – – – –

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 28.8 – 19.0 – 28.0 – 21.8
Single modes 30.7 4.7 19.6 1.5 28.6 6.5 S
Truck 30.6 4.6 19.5 1.5 28.6 6.5 S
Rail – – – – – – –
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 28.4
Parcel, USPS or courier S S S S S S 28.5
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 43.6

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 32.9 – S S 45.9 – S
Single modes 33.6 3.0 S S 46.0 3.3 S
Truck 34.6 7.7 S S 41.3 10.9 S
Rail S S S S S S 29.8
All other Single modes S S S S S S 27.9
Multiple modes 40.8 1.0 S S S S 21.9
Parcel, USPS or courier 40.8 1.0 S S S S 21.9
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S S

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 13.1 – 16.7 – 19.3 – S
Single modes 14.7 5.1 10.7 7.4 19.7 1.1 S
Truck 16.4 4.8 27.8 7.1 34.6 10.5 S
Rail 26.4 7.9 23.9 12.8 25.6 11.1 9.7
All other Single modes S S S S S S 31.6
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
All other multiple modes – – – – – – –
Other and unknown modes 39.6 5.1 46.0 7.4 40.2 1.1 S

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 31.1 – S S S S 16.2
Single modes 35.9 13.3 S S S S 41.5
Truck 38.5 12.1 S S S S 46.7
Rail S S S S S S 28.7
All other Single modes S S S S S S 26.3
Multiple modes 32.4 13.2 S S S S 13.1
Parcel, USPS or courier 31.9 13.3 S S S S 13.0
All other multiple modes S S S S S S 30.2
Other and unknown modes 47.9 1.5 S S S S S

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 40.1 – 30.8 – 25.4 – 14.1
Single modes 45.3 7.1 31.8 3.2 27.5 4.8 28.8
Truck 45.3 7.2 31.8 3.2 27.6 4.9 28.9
Rail – – – – – – –
All other Single modes S S S S S S 38.2
Multiple modes 48.5 6.2 44.6 1.9 47.7 3.9 8.4
Parcel, USPS or courier 48.9 6.2 47.0 1.9 S S 8.4
All other multiple modes S S S S S S 29.8
Other and unknown modes 31.2 1.3 S S S S 28.4

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 18.2 – 48.2 – S S 41.8
Single modes 17.0 5.3 45.3 1.9 S S S
Truck 16.7 6.6 27.7 12.4 26.2 19.5 S
Rail S S S S S S 27.4
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 21.7
Parcel, USPS or courier S S 39.6 – S S 20.1
All other multiple modes S S S S S S 32.2
Other and unknown modes 29.9 0.4 S S S S 28.8

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 18.6 – 42.0 – 42.4 – 16.6
Single modes 37.5 8.6 46.2 10.9 S S 21.9
Truck 25.9 8.7 46.7 13.1 S S S
Rail S S S S S S 29.8
All other Single modes S S 49.0 2.1 S S 16.3
Multiple modes 28.9 8.2 27.9 9.2 35.8 9.3 9.7
Parcel, USPS or courier 28.9 8.2 27.9 9.2 35.8 9.3 9.7
All other multiple modes – – – – – – –
Other and unknown modes S S S S 48.1 0.2 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 24.7 – 28.5 – 30.6 – 19.0
Single modes 27.5 9.6 31.2 5.0 33.4 5.2 40.3
Truck 27.5 9.6 31.2 5.0 33.4 5.2 42.1
Rail – – – – – – –
All other Single modes S S S S S S 29.9
Multiple modes S S S S S S 27.5
Parcel, USPS or courier S S S S S S 27.5
All other multiple modes S S S S S S 34.9
Other and unknown modes S S S S 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 44.8 – S S S
Single modes 43.6 13.3 49.5 10.8 S S S
Truck 43.6 13.3 49.5 10.8 S S S
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S 29.9
Parcel, USPS or courier S S S S S S 29.9
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 31.5

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.