Table B-6. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for CBSA of Origin: 2002

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 17.0 14.6 25.7 12.0
Single modes 19.2 2.2 15.2 1.6 27.2 2.3 29.4
Truck 21.0 2.4 15.7 5.0 13.2 7.2 23.2
Rail 35.9 2.0 48.4 4.1 S S 12.6
All other Single modes 10.9 0.7 23.6 2.1 48.8 0.3 5.9
Multiple modes 12.4 2.2 33.9 0.2 30.0 0.8 4.8
Parcel, USPS or courier 13.0 2.2 15.0 0.1 21.1 0.4 4.8
All other multiple modes 28.2 0.1 S S 48.9 0.8 S
Other and unknown modes 31.0 0.8 29.3 1.5 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 47.4 49.4 40.3 S
Single modes 47.4 49.4 40.3 S
Truck 47.2 4.5 47.4 5.3 41.6 7.5 S
Rail S S S S S S 30.2
All other Single modes
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 23.3 14.0 20.2 43.7
Single modes 23.5 2.1 13.6 3.1 14.9 6.4 40.8
Truck 24.1 5.7 15.9 7.4 18.3 11.6 41.4
Rail S S S S S S 29.8
All other Single modes
Multiple modes S S S S S S 24.3
Parcel, USPS or courier S S S S S S 30.0
All other multiple modes S S S S S S 35.5
Other and unknown modes S S S S S S 32.1

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 31.9 38.8 S S 46.3
Single modes S S 48.6 12.9 S S 45.9
Truck S S 34.1 13.3 S S S
Rail S S S S S S 28.3
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 47.6 15.0 48.6 12.9 S S 31.4

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 19.6 22.4 27.2 11.0
Single modes 19.6 0.2 22.4 0.1 27.2 10.2
Truck 22.9 5.8 25.9 6.0 28.6 7.1 11.0
Rail 37.1 0.4 24.2 0.4 23.6 3.3 37.8
All other Single modes 20.1 5.7 23.7 5.8 S S S
Multiple modes S S S S S S 46.1
Parcel, USPS or courier S S S S S S 43.0
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 28.6

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 17.9 S S S S S
Single modes 19.2 7.3 S S S S S
Truck 20.1 6.8 46.3 11.7 37.2 12.8 S
Rail S S S S S S S
All other Single modes S S 38.4 45.0 19.8
Multiple modes 34.6 5.3 S S S S 20.8
Parcel, USPS or courier 35.1 5.3 22.3 0.4 27.5 1.3 20.6
All other multiple modes S S S S S S 31.6
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 21.2 23.8 S S 12.1
Single modes 15.9 8.1 25.9 3.1 S S 18.5
Truck 16.0 8.0 23.6 2.9 S S 19.7
Rail S S S S S S 31.0
All other Single modes S S S S S S 19.5
Multiple modes 39.7 8.3 29.9 2.0 34.8 8.3 4.8
Parcel, USPS or courier 39.8 8.2 29.6 2.0 34.8 8.2 4.8
All other multiple modes S S S S S S 28.4
Other and unknown modes 48.7 1.5 S S S S 36.9

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 16.3 31.6 S S 22.7
Single modes 19.0 4.0 32.1 0.6 S S 24.6
Truck 14.1 8.6 26.2 7.3 45.8 11.2 21.4
Rail S S 44.2 7.6 S S 16.6
All other Single modes 48.3 0.8 S S S S 16.6
Multiple modes 23.6 3.4 23.9 0.2 36.3 0.3 11.9
Parcel, USPS or courier 23.0 3.2 21.6 0.1 36.7 0.3 12.3
All other multiple modes S S S S S S 29.9
Other and unknown modes 32.1 1.6 35.0 0.6 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 S S 38.8 12.4
Single modes S S S S 41.0 3.8 40.3
Truck S S S S 40.6 3.6 S
Rail S S S S S S 31.7
All other Single modes 37.4 3.7 S S S S 4.1
Multiple modes 15.1 7.8 32.8 3.2 29.0 3.7 4.0
Parcel, USPS or courier 15.6 7.7 43.9 3.1 45.4 3.5 4.0
All other multiple modes 42.0 0.2 S S S S 23.6
Other and unknown modes S S S S 45.4 0.7 43.2

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 10.0 17.0 24.4 15.5
Single modes 11.8 3.3 17.1 1.0 24.6 2.2 30.3
Truck 11.9 3.3 17.0 1.0 24.1 2.2 29.2
Rail S S S S S S 31.6
All other Single modes S S S S S S 14.0
Multiple modes 15.3 2.9 43.3 0.8 35.3 2.2 7.6
Parcel, USPS or courier 14.9 2.7 37.1 0.6 37.0 1.1 7.6
All other multiple modes S S S S S S 28.2
Other and unknown modes 39.6 0.5 41.7 0.2 42.3 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 17.4
Single modes S S S S S S 41.9
Truck S S S S S S S
Rail
All other Single modes S S S S S S 29.3
Multiple modes S S S S S S 19.5
Parcel, USPS or courier S S 41.4 9.1 39.1 16.0 19.5
All other multiple modes S S S S S S 31.6
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.