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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 6.2 – 14.6 – 10.8 – 15.2
Single modes 8.1 3.1 14.8 0.6 11.0 1.0 13.2
Truck 8.5 3.4 17.3 3.4 13.4 7.9 10.9
Rail 23.8 0.3 23.1 1.8 46.2 8.2 18.3
All other Single modes 23.3 0.9 41.5 2.5 S S 3.9
Multiple modes 15.7 3.1 S S 29.1 0.5 10.3
Parcel, USPS or courier 16.1 3.1 28.5 – 32.6 0.5 10.3
All other multiple modes S S S S S S 29.8
Other and unknown modes 29.7 0.7 32.4 0.3 37.3 0.8 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 44.1 – 40.4 – 42.3 – 27.4
Single modes 46.2 3.4 41.2 3.4 43.2 2.1 22.7
Truck 48.4 9.7 48.3 11.0 46.2 16.3 25.5
Rail S S S S S S 27.9
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 31.8
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 30.5

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 28.0 – 38.9 – 26.5 – 30.7
Single modes 30.8 4.5 39.2 0.8 26.7 0.7 S
Truck 30.6 4.7 39.1 0.8 25.6 2.9 S
Rail S S S S S S 29.8
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 28.6
Parcel, USPS or courier S S S S S S 28.6
All other multiple modes – – – – – – –
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 42.6 – 16.0 – 18.2 – 15.0
Single modes 42.6 0.1 16.0 – 18.2 – 14.9
Truck 45.5 7.4 16.5 1.8 20.9 7.1 15.5
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 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 31.9 – 23.2 – 18.4 – 16.0
Single modes 31.5 0.2 22.9 0.2 18.3 0.3 16.3
Truck 33.9 5.4 25.1 5.8 18.7 1.6 16.3
Rail – – – – – – –
All other Single modes S S S S S S 31.4
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 32.1

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 19.9 – 18.7 – 20.5 – 21.2
Single modes 26.4 8.6 17.1 1.5 21.4 2.3 S
Truck 29.6 8.8 18.5 7.2 31.0 11.5 S
Rail 26.9 3.6 26.6 9.2 47.5 12.9 21.2
All other Single modes S S S S S S 23.7
Multiple modes S S S S 36.3 0.8 14.1
Parcel, USPS or courier S S 39.0 0.2 40.5 0.8 14.1
All other multiple modes S S S S S S 31.6
Other and unknown modes 44.3 2.2 46.6 0.3 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 14.6 – 11.1 – 22.0 – 19.8
Single modes 18.1 7.0 10.7 2.7 23.7 7.1 S
Truck 18.1 7.0 10.8 2.7 23.7 7.1 S
Rail S S S S S S 31.6
All other Single modes 28.7 – S S S S 21.7
Multiple modes 46.4 6.9 S S S S 14.1
Parcel, USPS or courier 46.4 6.9 S S S S 14.1
All other multiple modes – – – – – – –
Other and unknown modes 33.4 0.5 39.7 0.7 S S 40.1

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 26.4 – S S 34.7 – 21.1
Single modes 26.2 4.0 S S 34.8 0.3 37.5
Truck 25.9 3.8 S S 36.8 3.8 36.1
Rail S S S S S S 30.6
All other Single modes S S S S S S 31.0
Multiple modes S S S S S S 16.2
Parcel, USPS or courier S S S S S S 16.2
All other multiple modes – – – – – – –
Other and unknown modes S S S S 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 16.8 – 28.3 – 20.4 – 16.8
Single modes 18.3 6.6 30.8 6.4 24.7 10.7 S
Truck 25.8 8.1 31.4 6.4 25.6 10.9 19.4
Rail S S S S S S 31.6
All other Single modes 32.4 3.4 24.6 0.3 31.8 2.4 6.1
Multiple modes 27.6 6.5 39.8 4.8 40.8 8.9 8.5
Parcel, USPS or courier 25.6 5.7 41.2 4.8 45.5 8.9 8.5
All other multiple modes S S S S S S 31.6
Other and unknown modes 37.4 1.1 44.2 4.0 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 16.6 – 13.6 – 8.2 – 22.7
Single modes 19.3 5.4 14.2 1.2 9.0 2.3 35.2
Truck 19.7 5.8 14.6 1.7 9.2 4.0 34.4
Rail S S S S S S 31.6
All other Single modes S S S S S S 25.0
Multiple modes S S S S 47.5 2.3 27.8
Parcel, USPS or courier S S S S 47.5 2.3 27.8
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S 34.5 0.2 37.4

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 43.1 – S S S S 43.7
Single modes 44.1 12.7 S S S S S
Truck 41.4 11.7 S S S S S
Rail – – – – – – –
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 28.9
Parcel, USPS or courier S S S S S S 28.9
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.