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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 15.5 – 20.4 – 20.4 – 10.2
Single modes 16.1 2.1 17.5 2.0 20.6 0.9 8.2
Truck 16.4 2.5 18.2 2.6 22.6 5.0 8.6
Rail 49.8 0.9 S S S S 39.1
All other Single modes 38.9 0.2 S S S S 31.4
Multiple modes 26.2 1.9 33.2 0.3 38.5 0.8 10.4
Parcel, USPS or courier 26.2 1.9 33.3 0.3 38.8 0.8 10.4
All other multiple modes 48.8 – S S S S 41.3
Other and unknown modes 35.6 0.7 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 46.5 – 42.2 – 48.4 – 42.4
Single modes 47.5 1.9 42.6 1.2 48.8 0.8 40.7
Truck 47.6 1.9 42.5 1.2 48.5 0.9 41.0
Rail S S S S S S 31.6
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 30.1
Parcel, USPS or courier S S S S S S 30.1
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 44.4

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 47.6 – 41.6 – 28.6 – 24.3
Single modes 48.0 10.0 41.6 0.2 28.7 0.8 S
Truck 48.0 10.0 41.6 0.4 29.2 1.8 S
Rail S S S S S S 31.8
All other Single modes – – – – – – –
Multiple modes 41.2 10.0 41.0 0.2 40.5 0.8 21.3
Parcel, USPS or courier 41.2 10.0 41.0 0.2 40.5 0.8 21.3
All other multiple modes – – – – – – –
Other and unknown modes – – – – – – –

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 27.2 – 23.4 – S S 21.0
Single modes 28.1 2.6 23.5 1.0 S S 20.4
Truck 28.4 2.6 23.3 1.1 S S 20.4
Rail S S S S S S 31.5
All other Single modes – – – – – – –
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
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 S S S S S S 30.2
Single modes S S S S S S 38.9
Truck S S S S S S 38.9
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 – – – – – – –
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 S S 40.1 – S S 18.8
Single modes S S 41.0 4.2 S S 18.2
Truck S S 41.3 4.3 S S 18.3
Rail S S S S S S 25.6
All other Single modes S S S S S S 33.1
Multiple modes S S S S S S 43.1
Parcel, USPS or courier S S S S S S 43.0
All other multiple modes S S S S S S 29.8
Other and unknown modes S S S S S S 38.7

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 38.1 – 21.7 – 26.7 – 14.0
Single modes 41.4 6.2 22.1 1.8 28.1 5.2 16.1
Truck 41.5 6.3 22.1 1.8 28.2 5.3 17.3
Rail S S S S S S 42.2
All other Single modes S S S S S S 26.0
Multiple modes 42.0 6.3 S S S S 12.9
Parcel, USPS or courier 42.0 6.3 S S S S 12.9
All other multiple modes S S S S S S 31.6
Other and unknown modes 43.8 0.7 S S S S 46.5

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 17.2 – S S 16.7 – 24.7
Single modes 17.0 1.6 S S 17.0 1.3 27.3
Truck 17.3 2.2 S S 17.7 2.9 27.1
Rail S S S S 47.3 2.8 30.6
All other Single modes S S S S S S 19.2
Multiple modes 41.8 1.7 46.4 0.2 S S 30.2
Parcel, USPS or courier 41.9 1.8 46.8 0.2 S S 30.0
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 47.3

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 17.3 – 35.4 – S S 29.3
Single modes 16.9 3.2 36.4 2.4 S S 30.9
Truck 19.0 6.6 30.3 12.0 36.6 15.9 32.5
Rail S S S S S S 24.6
All other Single modes S S S S S S 38.5
Multiple modes 39.5 2.6 38.2 2.2 39.1 3.5 21.6
Parcel, USPS or courier 39.5 2.6 38.2 2.2 39.1 3.5 21.6
All other multiple modes – – – – – – –
Other and unknown modes S S S S 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 17.0 – 30.8 – 28.9 – 23.4
Single modes 18.0 1.7 31.0 0.3 29.4 0.5 33.4
Truck 18.1 1.7 31.1 0.4 29.5 0.7 34.2
Rail – – – – – – –
All other Single modes S S S S S S 23.6
Multiple modes 25.0 1.5 23.7 0.2 14.0 0.5 15.4
Parcel, USPS or courier 25.0 1.5 23.7 0.2 14.0 0.5 15.4
All other multiple modes – – – – – – –
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 S S S S 33.2
Single modes S S S S S S 34.0
Truck 41.9 18.0 S S S S 35.4
Rail S S S S S S 31.6
All other Single modes – – – – – – –
Multiple modes S S S S S S 33.8
Parcel, USPS or courier S S S S S S 33.8
All other multiple modes – – – – – – –
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.