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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]

Excel | CSV

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 8.3 – 19.1 – 14.3 – 14.7
Single modes 13.9 4.0 19.4 0.8 14.2 1.8 32.5
Truck 14.4 4.2 19.4 0.8 12.7 3.3 44.0
Rail S S 39.9 0.6 48.2 3.0 22.5
All other Single modes 24.2 0.7 38.4 – 40.3 0.1 7.0
Multiple modes 11.8 3.8 20.4 0.4 23.5 1.8 6.9
Parcel, USPS or courier 11.8 3.8 20.5 0.4 23.6 1.8 6.9
All other multiple modes S S S S S S 31.4
Other and unknown modes 27.9 0.8 34.3 0.8 18.7 0.7 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 S S S S S S 30.6
Single modes S S S S S S 30.6
Truck S S S S S S 31.5
Rail – – – – – – –
All other Single modes S S S S S S 31.6
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 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 26.3 – 25.9 – 36.3 – S
Single modes 26.6 0.9 25.9 0.3 36.6 1.5 S
Truck 26.6 0.9 25.9 0.3 36.6 1.5 S
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S 29.8
Parcel, USPS or courier S S S S S S 29.8
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 30.3

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 15.5 – 16.3 – 25.1 – 21.2
Single modes 15.9 2.5 16.9 3.6 26.0 6.7 21.3
Truck 15.7 3.1 17.4 3.5 19.1 8.9 19.2
Rail 42.4 2.8 42.5 1.2 43.9 8.8 25.9
All other Single modes – – – – – – –
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 31.3

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 22.2 – 29.7 – 31.6 – 24.6
Single modes 22.7 1.9 30.4 3.0 31.7 1.1 25.4
Truck 22.7 1.9 30.4 3.0 31.7 1.1 25.4
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S 37.2
Parcel, USPS or courier S S S S S S 37.2
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 33.6

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 18.2 – 41.5 – 20.9 – 43.6
Single modes 23.4 7.5 42.9 5.0 22.3 5.7 S
Truck 26.0 9.2 42.9 5.4 22.6 7.2 S
Rail – – – – – – –
All other Single modes S S 41.2 0.5 43.6 1.9 22.5
Multiple modes 49.0 7.1 S S S S 11.0
Parcel, USPS or courier 49.0 7.1 S S S S 11.1
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S 38.7 0.2 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 10.2 – 18.1 – 11.1 – 15.1
Single modes 13.1 5.0 18.0 1.6 10.3 3.6 26.7
Truck 13.2 5.0 18.0 1.6 10.3 3.5 26.7
Rail – – – – – – –
All other Single modes S S S S S S 28.4
Multiple modes 22.8 5.5 17.2 0.4 23.9 2.0 14.0
Parcel, USPS or courier 22.8 5.5 17.2 0.4 23.9 2.0 14.0
All other multiple modes – – – – – – –
Other and unknown modes 44.3 3.9 44.3 1.7 43.3 4.1 27.5

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 7.9 – S S 23.7 – S
Single modes 8.7 3.7 S S 24.9 1.8 S
Truck 8.3 3.3 S S 16.2 6.6 S
Rail S S S S S S 30.1
All other Single modes S S 46.5 0.1 S S 14.2
Multiple modes 23.5 4.0 30.9 0.7 36.8 1.0 23.0
Parcel, USPS or courier 23.5 4.0 30.9 0.7 36.8 1.0 23.0
All other multiple modes – – – – – – –
Other and unknown modes 43.4 1.1 41.9 3.2 S S 21.8

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 15.3 – 14.9 – 17.5 – 12.5
Single modes 25.9 5.2 18.8 5.5 22.7 7.7 21.3
Truck 25.2 4.7 19.4 5.9 23.5 7.9 S
Rail – – – – – – –
All other Single modes 38.1 1.2 S S S S 10.1
Multiple modes 16.4 5.2 25.9 5.1 27.5 7.9 9.4
Parcel, USPS or courier 16.4 5.2 25.9 5.1 27.5 7.9 9.4
All other multiple modes – – – – – – –
Other and unknown modes S S 46.6 2.2 S S 38.6

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 48.3 – S S 48.7 – 14.7
Single modes S S S S S S S
Truck S S S S S S S
Rail – – – – – – –
All other Single modes S S 48.5 – S S 26.8
Multiple modes 31.5 5.9 47.1 2.8 S S 10.4
Parcel, USPS or courier 31.5 5.9 47.1 2.8 S S 10.4
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 35.0 – 38.7 – 50.0 – S
Single modes 38.2 7.3 39.2 6.1 S S S
Truck 38.2 7.3 39.2 6.1 S S S
Rail – – – – – – –
All other Single modes – – – – – – –
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 – – – – – – –

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.