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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 6.5 – 17.4 – 18.2 – 14.7
Single modes 6.5 1.4 17.5 0.7 18.5 1.2 15.1
Truck 6.5 1.9 18.9 4.0 13.7 6.5 14.0
Rail 30.4 0.6 36.3 2.6 30.4 3.3 12.4
All other Single modes 31.7 0.3 S S S S 3.8
Multiple modes 23.8 1.5 43.3 0.6 41.9 1.1 16.4
Parcel, USPS or courier 25.7 1.4 26.7 – 24.4 0.2 16.4
All other multiple modes 22.3 0.1 S S S S 20.5
Other and unknown modes 23.0 0.4 39.9 0.3 43.6 0.5 25.0

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 40.7 – S S S S S
Single modes 41.1 1.5 S S S S S
Truck 42.1 5.2 S S S S S
Rail 45.8 1.3 49.2 4.2 45.7 6.5 27.8
All other Single modes S S S S S S 29.8
Multiple modes S S S S S S 31.0
Parcel, USPS or courier S S S S S S 31.0
All other multiple modes – – – – – – –
Other and unknown modes 44.9 1.4 S S 42.7 1.2 24.7

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 12.9 – 9.7 – 17.1 – 26.1
Single modes 12.5 1.1 10.0 0.9 18.6 3.0 24.6
Truck 12.7 1.1 9.3 3.8 11.7 7.0 24.8
Rail 46.5 0.4 S S 47.6 1.4 32.4
All other Single modes S S S S S S 31.6
Multiple modes 44.2 1.1 29.8 0.6 38.2 2.7 33.0
Parcel, USPS or courier S S S S S S 31.0
All other multiple modes 42.4 1.0 29.8 0.6 38.3 2.7 23.4
Other and unknown modes 45.5 0.2 S S S S 39.7

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 18.7 – 20.9 – 37.0 – S
Single modes 23.0 9.1 21.3 9.1 44.1 8.9 S
Truck 23.0 9.1 21.5 9.1 46.5 9.6 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 S S S S S S 31.6
Other and unknown modes S S S S S S 30.1

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 18.6 – 14.9 – 34.1 – 20.0
Single modes 18.6 – 14.9 – 34.1 – 10.1
Truck 19.0 1.2 16.1 5.7 9.5 12.2 10.1
Rail S S S S S S 31.6
All other Single modes – – – – – – –
Multiple modes S S S S S S 28.4
Parcel, USPS or courier S S S S S S 28.4
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 32.9

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 13.0 – 20.9 – 21.6 – 43.7
Single modes 14.0 7.9 20.6 0.8 21.9 1.1 44.5
Truck 12.9 7.5 17.8 6.0 21.9 6.0 48.5
Rail S S 36.2 5.8 30.0 6.5 25.9
All other Single modes S S S S S S 17.3
Multiple modes S S 34.9 0.4 34.8 0.8 S
Parcel, USPS or courier S S S S S S S
All other multiple modes 46.5 0.2 S S 48.1 0.6 27.8
Other and unknown modes 49.4 1.7 S S S S 44.5

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 13.2 – 14.4 – 12.7 – 15.5
Single modes 12.9 1.6 14.7 0.7 12.9 0.7 21.5
Truck 12.6 2.8 17.5 4.8 16.1 6.5 18.3
Rail 14.3 0.6 16.4 3.5 21.6 4.7 8.6
All other Single modes S S S S S S 22.3
Multiple modes 47.2 1.6 42.2 0.7 35.2 0.8 9.3
Parcel, USPS or courier 48.8 1.7 S S S S 9.4
All other multiple modes S S S S S S 29.4
Other and unknown modes 37.1 0.2 39.6 0.2 43.0 – 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 11.1 – 46.3 – 11.5 – 20.0
Single modes 10.9 1.8 47.2 1.9 12.0 2.0 26.6
Truck 11.8 2.1 S S 9.1 4.4 26.7
Rail 44.2 1.5 S S 44.2 4.4 35.2
All other Single modes 37.7 0.3 S S S S 7.3
Multiple modes 20.6 1.3 40.8 0.6 42.0 0.7 10.6
Parcel, USPS or courier 25.6 1.3 26.7 0.1 26.6 0.2 10.6
All other multiple modes 37.3 0.4 S S S S 26.4
Other and unknown modes S S S S S S 30.0

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 13.8 – 21.3 – 25.8 – 13.0
Single modes 11.8 2.5 22.2 1.4 27.4 3.3 18.4
Truck 11.9 2.5 22.2 1.5 27.5 3.3 17.5
Rail S S S S S S 31.6
All other Single modes 39.0 0.4 S S S S 11.9
Multiple modes S S S S S S 19.8
Parcel, USPS or courier S S S S S S 19.0
All other multiple modes S S S S S S 28.6
Other and unknown modes 45.7 1.2 42.2 1.3 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 12.6 – 36.6 – 44.6 – 12.6
Single modes 13.2 1.3 36.4 1.3 44.4 1.2 17.0
Truck 14.1 2.5 19.9 14.4 17.1 18.5 14.9
Rail S S S S S S 30.1
All other Single modes S S S S S S 14.1
Multiple modes 17.1 0.7 18.4 0.2 21.9 0.5 9.1
Parcel, USPS or courier 17.9 0.7 20.2 0.2 21.1 0.4 9.3
All other multiple modes S S S S S S 31.0
Other and unknown modes S S S S S S 49.8

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 41.6 – S S S S 32.4
Single modes 44.5 4.1 S S S S S
Truck 46.2 5.4 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 28.0
Parcel, USPS or courier S S S S S S 28.0
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 32.0

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.