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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 7.4 – 12.2 – 21.1 – 17.1
Single modes 10.1 4.4 12.6 0.8 21.8 1.9 45.3
Truck 10.5 4.3 14.3 7.1 26.4 9.2 48.8
Rail 36.3 1.3 S S S S 36.4
All other Single modes 32.0 1.0 48.3 4.3 48.0 9.7 8.9
Multiple modes 22.7 4.4 19.8 0.2 16.8 1.5 4.9
Parcel, USPS or courier 23.0 4.4 25.4 0.2 23.9 1.3 4.9
All other multiple modes 43.1 0.1 36.1 – 42.2 0.5 23.3
Other and unknown modes 29.8 0.4 32.8 0.7 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 38.8 – 45.5 – 39.6 – 33.0
Single modes 38.8 – 45.5 – 39.6 – 33.0
Truck S S 44.0 13.5 S S 29.5
Rail S S S S S S 29.8
All other Single modes 42.3 10.8 48.7 12.6 48.3 13.4 25.8
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
All other multiple modes – – – – – – –
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 22.8 – 25.1 – 36.4 – S
Single modes 22.7 0.2 25.1 0.3 36.3 0.5 S
Truck 23.4 1.6 25.8 2.2 39.3 4.5 S
Rail 24.0 1.7 33.1 2.3 23.6 4.7 23.3
All other Single modes – – – – – – –
Multiple modes S S S S S S S
Parcel, USPS or courier S S S S S S 29.7
All other multiple modes S S S S S S 31.6
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 33.1 – 35.1 – 33.7 – 12.9
Single modes 33.0 0.4 35.0 0.5 33.7 0.3 13.1
Truck 33.0 0.4 35.0 0.5 33.7 0.3 13.1
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
All other multiple modes – – – – – – –
Other and unknown modes 36.7 0.4 39.8 0.5 31.5 0.3 27.9

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 46.9
Single modes S S S S S S 46.0
Truck S S S S S S 46.0
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 17.9 – S S S S 17.2
Single modes 19.7 4.5 S S S S S
Truck 24.1 6.0 32.7 11.1 27.6 9.0 S
Rail 41.8 5.1 S S S S 44.7
All other Single modes 46.8 1.3 S S 43.0 – 24.3
Multiple modes S S S S S S 15.7
Parcel, USPS or courier S S S S S S 15.4
All other multiple modes S S S S S S 31.6
Other and unknown modes 46.0 0.5 42.0 0.7 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 15.1 – 35.8 – 30.7 – 10.2
Single modes 22.3 8.7 37.2 3.4 33.8 8.1 16.8
Truck 22.3 8.7 37.2 3.4 33.8 8.1 17.7
Rail S S S S S S 31.6
All other Single modes 40.9 0.2 37.8 – 36.6 0.1 30.2
Multiple modes 29.4 8.0 36.6 2.2 36.6 6.2 12.0
Parcel, USPS or courier 27.6 7.4 43.0 2.0 38.7 4.6 12.0
All other multiple modes S S S S S S 30.4
Other and unknown modes S S S S S S 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 13.9 – 34.0 – 29.6 – 14.1
Single modes 19.3 6.9 34.4 0.7 29.8 1.2 17.0
Truck 18.4 6.2 40.5 7.3 33.1 9.9 19.0
Rail 48.2 2.9 49.1 7.3 46.3 10.0 27.5
All other Single modes S S S S S S 17.7
Multiple modes 38.5 7.0 40.2 0.6 43.6 0.7 10.7
Parcel, USPS or courier 38.5 7.0 40.2 0.6 43.6 0.7 10.7
All other multiple modes – – – – – – –
Other and unknown modes 48.5 0.3 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 16.1 – 16.6 – 20.8 – 39.4
Single modes 23.6 9.2 19.7 5.4 25.2 6.5 S
Truck 24.8 9.9 20.8 5.7 27.9 7.4 S
Rail S S S S S S 29.9
All other Single modes 46.9 1.3 29.7 0.3 30.0 0.5 12.0
Multiple modes 39.6 8.8 34.8 3.9 40.4 6.3 5.1
Parcel, USPS or courier 39.6 8.8 34.8 3.9 40.4 6.3 5.1
All other multiple modes – – – – – – –
Other and unknown modes 27.3 1.4 28.9 2.0 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 19.5 – 31.9 – 27.1 – 15.9
Single modes 26.6 8.1 39.3 10.5 38.6 11.1 S
Truck 26.4 8.4 37.1 10.9 35.9 10.7 S
Rail S S S S S S 31.6
All other Single modes S S S S S S 32.1
Multiple modes 33.1 8.0 34.0 6.0 36.9 7.6 6.6
Parcel, USPS or courier 33.6 8.1 37.6 6.0 40.2 7.5 6.6
All other multiple modes S S S S S S 28.1
Other and unknown modes S S S S S S 33.8

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 46.6 – S S S S 31.4
Single modes S S S S S S S
Truck S S S S S S S
Rail S S S S S S 31.6
All other Single modes S S S S S S S
Multiple modes S S S S S S 29.5
Parcel, USPS or courier S S S S S S 29.5
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.