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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]

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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 13.0 19.6 20.6 18.4
Single modes 15.0 4.7 24.1 5.9 23.8 8.2 27.8
Truck 15.6 4.8 24.6 6.8 27.3 9.1 29.2
Rail S S 38.6 1.2 39.0 3.3 17.3
All other Single modes 39.2 0.6 S S 39.6 0.2 41.2
Multiple modes 21.0 3.8 30.9 0.3 49.8 2.6 12.7
Parcel, USPS or courier 22.3 3.7 22.6 0.2 26.5 1.0 12.7
All other multiple modes 45.4 0.4 S S S S S
Other and unknown modes 38.1 4.3 39.0 5.9 S S 23.4

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 41.6 35.3 49.7 35.8
Single modes 41.9 0.8 35.4 49.7 32.4
Truck 43.4 5.8 28.8 6.0 S S 33.4
Rail 42.3 5.8 48.9 6.0 48.7 7.3 24.4
All other Single modes
Multiple modes S S S S S S S
Parcel, USPS or courier S S S S S S S
All other multiple modes
Other and unknown modes S S S S S S 31.6

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 18.1 21.8 14.8 S
Single modes 18.1 1.6 22.1 0.7 14.3 2.4 S
Truck 18.1 1.6 22.1 0.7 14.3 2.4 S
Rail
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 20.1
Parcel, USPS or courier S S 45.5 38.7 20.1
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 39.8

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 19.8 25.5 24.7 11.2
Single modes 19.1 14.2 15.1 16.3 21.4 16.5 15.5
Truck 19.1 14.2 15.1 16.3 21.4 16.5 15.5
Rail
All other Single modes
Multiple modes
Parcel, USPS or courier
All other multiple modes
Other and unknown modes 47.2 14.2 46.5 16.3 46.5 16.5 25.8

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 45.9 40.5 40.9 18.5
Single modes 45.9 40.5 40.9 18.5
Truck S S S S S S 27.5
Rail
All other Single modes S S S S 46.8 12.7 26.3
Multiple modes
Parcel, USPS or courier
All other multiple modes
Other and unknown modes S S S S S S 31.6

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 24.6 41.1 S S 13.5
Single modes 25.0 12.4 26.0 18.6 34.5 18.3 47.9
Truck 26.1 12.2 26.0 18.6 34.5 18.3 48.1
Rail
All other Single modes S S S S S S 28.8
Multiple modes S S 45.1 2.1 48.0 7.0 12.6
Parcel, USPS or courier S S S S S S 12.6
All other multiple modes S S S S S S 48.4
Other and unknown modes S S S S S S 26.5

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 25.0 18.9 30.4 19.1
Single modes 30.0 6.7 20.8 4.3 33.3 6.8 46.8
Truck 30.1 6.7 20.8 4.2 33.3 6.8 46.7
Rail S S S S S S 34.9
All other Single modes S S S S S S 28.2
Multiple modes 36.2 4.0 23.1 1.0 37.3 2.6 16.2
Parcel, USPS or courier 36.9 4.0 26.0 1.0 39.8 2.8 16.3
All other multiple modes S S S S S S 28.2
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 24.3 48.6 49.1 14.4
Single modes 27.0 4.4 49.1 2.0 S S 43.0
Truck 27.7 4.5 49.3 2.3 S S 42.5
Rail S S S S S S 30.2
All other Single modes S S S S S S 17.9
Multiple modes S S S S S S 17.0
Parcel, USPS or courier S S S S S S 16.5
All other multiple modes S S S S S S 30.7
Other and unknown modes 42.6 1.0 42.8 0.4 S S 25.8

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 35.3 32.7 30.7 S
Single modes 41.9 7.7 34.8 7.6 31.6 2.7 S
Truck 42.3 7.7 35.6 7.4 33.8 4.0 S
Rail 44.7 0.2 44.7 1.1 43.9 3.0 26.1
All other Single modes S S 41.3 40.3 0.2 22.7
Multiple modes 18.7 5.0 18.4 0.8 22.3 2.8 20.7
Parcel, USPS or courier 19.0 4.8 18.5 0.7 23.2 2.3 20.5
All other multiple modes S S S S S S S
Other and unknown modes 46.3 8.5 44.8 7.9 43.5 0.4 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 24.1 36.9 28.4 21.6
Single modes 27.4 5.3 37.9 3.0 30.6 5.2 S
Truck 27.5 5.4 37.9 3.0 30.6 5.2 S
Rail
All other Single modes S S S S S S 23.3
Multiple modes 37.0 5.3 44.3 3.0 S S 14.8
Parcel, USPS or courier 31.9 3.8 45.6 2.1 S S 14.8
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 35.6

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 S
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
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

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.