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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 21.1 – 9.2 – 25.2 – 8.4
Single modes 22.6 1.1 9.1 0.8 23.6 2.2 10.1
Truck 18.4 2.0 8.1 5.2 7.9 6.7 10.0
Rail S S 44.3 4.3 49.5 6.7 11.3
All other Single modes 18.5 1.1 22.1 3.5 28.3 2.6 10.6
Multiple modes 12.2 0.8 45.3 0.7 S S 7.6
Parcel, USPS or courier 13.4 0.7 31.4 – 24.1 0.2 7.5
All other multiple modes 37.5 0.3 S S S S 16.8
Other and unknown modes 25.4 0.4 36.5 0.4 38.8 0.4 32.6

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 31.0 – 48.4 – S S 27.9
Single modes 31.5 2.8 49.6 4.4 S S 26.7
Truck 37.8 10.2 42.3 14.3 37.0 18.1 23.5
Rail S S S S S S 29.0
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 S S S S S S 31.6
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S S

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 18.8 – 26.1 – 48.0 – S
Single modes 16.0 1.7 23.6 1.7 34.1 7.1 S
Truck 16.5 2.0 26.9 4.9 38.8 10.2 S
Rail 27.0 1.5 29.7 5.0 34.7 10.3 21.3
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 30.8
Parcel, USPS or courier S S S S S S 30.2
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 39.4

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 S S 26.9 – 29.3 – 21.8
Single modes S S 27.2 1.4 29.5 0.6 22.7
Truck S S 29.6 5.1 29.1 10.0 22.2
Rail S S S S S S 33.0
All other Single modes S S S S S S 30.4
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 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 17.2 – 18.3 – 30.1 – 43.8
Single modes 18.1 2.0 18.3 2.4 24.4 7.5 31.6
Truck 34.8 11.3 25.4 8.9 20.8 8.8 25.5
Rail 49.5 1.5 S S 35.9 4.0 18.2
All other Single modes 21.0 10.1 22.4 7.1 29.4 7.9 20.0
Multiple modes S S S S S S 31.0
Parcel, USPS or courier S S S S S S 32.4
All other multiple modes S S S S S S 35.5
Other and unknown modes 40.6 1.9 40.5 1.3 40.8 1.0 23.7

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 11.7 – 20.5 – 23.8 – 24.4
Single modes 10.7 2.0 20.5 0.5 24.2 1.6 24.1
Truck 11.0 1.9 19.4 3.3 23.5 5.2 24.7
Rail 30.7 1.1 32.2 3.1 33.2 5.4 18.0
All other Single modes 35.1 – S S S S 16.6
Multiple modes S S 46.4 0.5 S S S
Parcel, USPS or courier S S 34.9 0.2 31.6 0.2 S
All other multiple modes S S S S S S 26.2
Other and unknown modes S S 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 11.8 – 27.5 – 21.2 – 13.3
Single modes 13.4 4.6 28.3 3.2 21.8 2.3 21.0
Truck 13.7 4.7 28.6 3.4 22.6 3.8 21.4
Rail 27.4 0.5 34.5 1.1 32.4 2.5 22.5
All other Single modes S S S S S S 29.0
Multiple modes 28.8 2.3 34.3 0.4 28.6 0.8 5.0
Parcel, USPS or courier 28.8 2.3 34.3 0.4 28.6 0.8 5.0
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 30.3

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 11.3 – 22.4 – 25.9 – 9.1
Single modes 11.9 1.4 22.2 0.7 26.0 1.5 13.2
Truck 11.7 2.0 21.0 3.3 15.1 5.6 12.6
Rail 21.5 1.2 36.4 2.9 S S 14.0
All other Single modes 47.5 0.3 S S S S 14.5
Multiple modes 28.6 1.1 S S 44.8 1.0 11.1
Parcel, USPS or courier 33.4 1.2 S S S S 10.3
All other multiple modes S S S S S S 24.5
Other and unknown modes 26.8 0.5 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 S S 44.3 – S S 19.4
Single modes S S 44.7 0.8 S S 33.5
Truck S S 37.2 4.5 40.3 7.3 34.7
Rail S S S S S S 20.3
All other Single modes S S 31.3 – 35.8 – 9.7
Multiple modes 22.2 2.4 24.9 0.6 32.2 1.3 9.7
Parcel, USPS or courier 26.0 2.4 36.3 0.3 38.0 0.3 9.6
All other multiple modes 47.1 0.3 40.5 0.4 S S 37.9
Other and unknown modes S S S S S S 29.1

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 10.8 – 24.3 – 14.8 – 10.7
Single modes 12.1 1.9 24.5 0.3 14.4 0.5 14.6
Truck 12.7 3.0 28.5 8.6 16.2 3.6 14.5
Rail S S S S S S S
All other Single modes 47.1 – S S S S 43.2
Multiple modes 16.0 2.0 34.2 0.2 37.5 0.5 10.5
Parcel, USPS or courier 16.0 2.0 34.2 0.2 37.5 0.5 10.5
All other multiple modes – – – – – – –
Other and unknown modes 34.6 0.6 36.8 – 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 39.7 – 29.1 – 41.0 – S
Single modes 40.9 10.3 29.1 0.9 41.1 2.0 S
Truck S S 35.2 9.9 S S S
Rail S S S S S S 31.6
All other Single modes – – – – – – –
Multiple modes S S S S S S 48.5
Parcel, USPS or courier S S S S S S 48.5
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.