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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 9.6 – 14.8 – 21.2 – 7.4
Single modes 11.8 3.7 14.2 1.8 17.6 4.2 33.6
Truck 12.7 3.8 19.6 6.4 32.2 9.6 31.8
Rail 20.1 0.6 18.3 5.9 20.3 8.4 13.0
All other Single modes 22.7 0.9 S S S S 2.8
Multiple modes 18.9 3.0 37.2 1.8 40.1 4.2 4.1
Parcel, USPS or courier 20.0 3.0 22.9 – 26.1 0.2 4.1
All other multiple modes 48.9 0.2 38.3 1.8 41.0 4.4 30.0
Other and unknown modes 29.2 1.2 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 28.9 – 26.7 – 25.6 – 35.7
Single modes 29.3 2.0 28.4 4.3 26.6 2.8 29.0
Truck 30.6 8.4 32.2 6.8 31.5 9.4 30.9
Rail 35.5 8.5 38.2 6.4 34.6 9.7 20.2
All other Single modes – – – – – – –
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 S S S S S S 29.9

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 30.8 – 40.1 – 24.6 – S
Single modes 30.8 – 40.1 – 24.6 – S
Truck 31.9 3.1 43.5 6.8 27.2 8.2 S
Rail 33.1 3.1 26.2 6.8 24.7 8.2 19.2
All other Single modes – – – – – – –
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
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 35.7 – 31.3 – 38.0 – S
Single modes 35.9 0.4 31.4 0.8 38.0 2.0 S
Truck 35.9 0.4 31.4 0.8 38.0 2.0 S
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 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 19.3 – 15.4 – 20.4 – 30.0
Single modes 19.6 2.1 18.1 4.6 15.8 7.0 28.9
Truck 26.3 10.6 41.1 10.1 S S 28.3
Rail 20.5 10.1 18.6 8.7 21.0 11.7 44.2
All other Single modes – – – – – – –
Multiple modes 36.0 1.8 38.9 4.6 41.7 7.0 S
Parcel, USPS or courier S S S S S S S
All other multiple modes 36.2 1.8 38.9 4.6 41.7 7.0 S
Other and unknown modes S S S S S S 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 20.6 – S S 31.7 – 29.0
Single modes 15.8 11.0 S S 33.4 7.3 S
Truck 15.9 11.0 S S 32.8 6.2 S
Rail S S S S S S 29.8
All other Single modes S S S S S S 26.3
Multiple modes 36.1 10.3 S S S S 10.4
Parcel, USPS or courier 36.1 10.3 S S S S 10.4
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 41.8

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 20.1 – S S S S 13.1
Single modes 32.1 9.9 S S S S 27.2
Truck 32.1 9.6 S S S S 27.8
Rail S S S S S S 31.6
All other Single modes S S S S S S 23.8
Multiple modes 26.0 4.5 42.0 1.4 40.6 2.5 5.8
Parcel, USPS or courier 26.0 4.5 42.0 1.4 40.6 2.5 5.8
All other multiple modes – – – – – – –
Other and unknown modes 37.7 8.2 33.0 1.9 32.5 0.3 S

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 19.3 – 37.6 – 35.4 – 14.3
Single modes 18.6 4.4 37.7 1.6 35.8 1.9 S
Truck 19.8 5.5 39.4 5.6 36.6 6.8 S
Rail S S 43.1 5.3 44.4 7.6 27.9
All other Single modes S S S S S S 21.6
Multiple modes 23.8 3.0 35.6 1.5 45.2 1.9 11.8
Parcel, USPS or courier 24.5 3.0 32.3 0.8 42.2 1.3 11.8
All other multiple modes S S 45.8 0.6 50.0 0.8 26.6
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 15.5 – S S S S 20.6
Single modes 18.8 7.9 S S S S 49.5
Truck 27.6 7.5 S S S S 42.1
Rail S S S S S S 31.6
All other Single modes 25.0 5.3 44.9 2.3 44.5 7.1 4.2
Multiple modes 25.3 7.6 45.7 9.1 S S 14.7
Parcel, USPS or courier 25.3 7.6 45.7 9.1 S S 14.7
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 13.7 – 26.8 – 20.4 – 10.2
Single modes 13.7 3.4 27.9 3.3 22.8 6.3 S
Truck 13.7 3.4 27.8 3.2 22.2 6.1 S
Rail S S S S S S 29.8
All other Single modes S S 39.7 – 41.0 0.1 18.7
Multiple modes 33.0 3.3 35.5 3.0 35.2 6.1 5.1
Parcel, USPS or courier 33.2 3.3 37.9 3.0 38.9 6.2 5.0
All other multiple modes S S S S S S 28.6
Other and unknown modes S S 42.3 0.6 46.9 0.7 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 27.8
Single modes S S S S S S 30.7
Truck S S S S S S 32.0
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 30.1
All other multiple modes S S S S S S 31.6
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.