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 4.6 11.0 27.1 13.7
Single modes 5.6 1.4 10.8 2.2 28.2 2.2 23.3
Truck 6.2 2.0 20.1 4.2 S S 23.1
Rail 12.8 2.1 11.7 1.7 12.8 5.1 5.0
All other Single modes 10.9 2.9 11.8 4.6 18.4 5.8 12.2
Multiple modes 13.3 0.8 47.2 0.5 S S 12.3
Parcel, USPS or courier 14.8 0.7 27.6 36.3 12.5
All other multiple modes 36.6 0.3 49.8 0.5 S S 17.5
Other and unknown modes 28.7 0.7 S S 42.6 0.4 29.8

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 18.2 37.1 S S S
Single modes 18.3 0.6 37.4 2.0 S S S
Truck 17.5 1.5 35.2 5.7 39.6 18.2 S
Rail S S S S S S 31.6
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 26.5
Parcel, USPS or courier S S S S S S 26.5
All other multiple modes
Other and unknown modes S S S S S S 30.5

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 11.1 17.0 40.4 20.1
Single modes 11.3 0.5 17.2 0.7 40.9 1.1 19.4
Truck 10.7 2.5 16.9 6.7 20.5 15.3 20.0
Rail 35.2 2.1 S S S S 20.6
All other Single modes S S S S S S 30.7
Multiple modes S S S S S S 29.0
Parcel, USPS or courier S S S S S S 31.6
All other multiple modes S S S S S S 27.9
Other and unknown modes S S S S S S S

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 47.7 49.7 37.2 S
Single modes 47.7 3.3 S S 38.7 8.3 S
Truck S S S S 44.1 13.9 S
Rail S S S S S S 27.0
All other Single modes S S S S S S 27.0
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 34.6 8.7 49.5 8.3 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 11.2 11.5 22.2 S
Single modes 11.6 1.3 11.6 1.1 25.2 7.4 S
Truck 23.4 5.2 19.1 3.9 S S S
Rail 28.3 0.7 20.8 0.5 26.3 1.1 12.1
All other Single modes 13.6 4.9 13.4 4.2 27.1 8.2 20.6
Multiple modes S S S S S S 37.5
Parcel, USPS or courier S S S S S S 31.9
All other multiple modes S S S S S S 31.7
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 8.6 25.7 45.9 12.4
Single modes 9.5 2.2 25.4 0.4 46.2 0.7 19.7
Truck 14.7 5.3 S S S S 22.5
Rail 13.4 5.2 9.9 5.1 9.6 8.4 3.3
All other Single modes 19.5 4.0 14.0 5.7 19.9 6.6 18.5
Multiple modes 41.8 1.3 40.5 0.2 39.7 0.7 23.8
Parcel, USPS or courier S S S S S S 21.5
All other multiple modes 29.8 0.2 39.1 0.2 40.6 0.7 22.6
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 7.3 13.3 7.7 11.7
Single modes 7.4 1.1 13.4 0.8 8.3 1.2 14.2
Truck 9.8 3.2 18.4 4.9 9.4 4.7 9.0
Rail 13.0 3.7 13.5 5.0 16.2 5.1 5.2
All other Single modes S S S S S S 26.0
Multiple modes S S S S S S 18.6
Parcel, USPS or courier S S 41.2 46.1 18.8
All other multiple modes S S S S S S 30.2
Other and unknown modes 42.8 0.5 42.3 0.3 46.3 0.1 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 11.5 S S 22.2 27.4
Single modes 11.3 3.1 26.9 15.4 28.5 8.5 S
Truck 10.3 5.2 30.1 14.0 16.2 9.7 S
Rail S S S S S S 24.5
All other Single modes S S 46.6 1.6 42.7 4.8 18.4
Multiple modes 26.0 1.7 31.5 0.1 24.6 0.5 S
Parcel, USPS or courier 26.1 1.7 32.4 0.1 30.4 0.3 36.1
All other multiple modes S S S S S S 32.6
Other and unknown modes 42.1 3.3 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 40.2 39.4 S S S
Single modes 44.6 8.7 41.2 5.9 S S S
Truck 27.3 9.3 26.1 12.5 28.2 18.3 S
Rail S S S S S S 28.1
All other Single modes S S S S S S 24.6
Multiple modes 26.5 7.5 S S S S 20.3
Parcel, USPS or courier 26.8 7.8 S S S S 19.8
All other multiple modes S S S S S S 31.6
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 16.5 31.5 24.9 19.3
Single modes 24.6 8.8 33.7 8.3 31.3 9.8 47.3
Truck 24.7 8.9 33.7 8.3 31.3 9.8 S
Rail
All other Single modes 49.6 0.1 S S S S 27.3
Multiple modes 28.0 7.9 S S S S 16.9
Parcel, USPS or courier 28.0 7.9 S S S S 16.9
All other multiple modes
Other and unknown modes S S S S 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 20.8 29.2 S S S
Single modes 20.9 2.9 30.3 4.1 S S S
Truck 27.1 14.1 34.3 16.9 S S S
Rail 47.2 12.5 S S S S 28.0
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 S S S S S S 31.6
Other and unknown modes S S S S S S 31.6

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.