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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 21.0 – 10.9 – 15.6 – 14.7
Single modes 23.8 3.8 10.8 6.3 16.5 1.8 20.0
Truck 26.2 4.5 6.3 6.5 20.7 5.6 20.7
Rail 15.0 0.8 23.2 6.1 23.9 6.4 15.1
All other Single modes 44.1 1.7 30.5 3.4 24.9 2.6 16.9
Multiple modes 28.0 3.8 31.6 0.4 35.1 1.7 5.5
Parcel, USPS or courier 31.2 3.9 24.5 – 25.2 0.1 5.5
All other multiple modes S S 35.4 0.4 37.5 1.7 27.9
Other and unknown modes 34.1 0.3 S S 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 26.8 – 39.8 – 49.5 – 44.2
Single modes 26.6 3.0 40.4 3.3 S S S
Truck 35.0 10.8 45.1 14.5 S S S
Rail – – – – – – –
All other Single modes 48.7 11.9 S S S S 23.0
Multiple modes S S S S S S 29.8
Parcel, USPS or courier S S S S S S 29.8
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 30.8

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 8.8 – 14.7 – 15.7 – 22.0
Single modes 9.2 0.9 14.6 0.4 15.5 0.6 22.8
Truck 9.5 2.4 17.9 7.5 14.9 11.3 23.1
Rail S S S S S S 32.3
All other Single modes S S S S S S 26.0
Multiple modes 46.3 0.8 S S 46.2 0.5 45.7
Parcel, USPS or courier S S S S S S 29.5
All other multiple modes S S S S 49.0 0.5 25.6
Other and unknown modes S S S S S S 25.7

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 13.7 – 16.4 – 47.7 – 30.6
Single modes 13.7 0.5 16.4 0.6 47.8 1.6 29.8
Truck 10.7 6.2 13.6 7.0 28.4 18.9 31.5
Rail 48.2 1.8 46.2 2.1 S S 26.5
All other Single modes S S S S S S 26.9
Multiple modes S S S S S S 30.6
Parcel, USPS or courier S S S S S S 31.6
All other multiple modes S S S S S S 40.0
Other and unknown modes 34.8 0.5 39.9 0.6 S S 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 23.2 – 16.7 – 23.5 – S
Single modes 23.7 1.6 18.3 8.5 25.0 3.7 S
Truck 31.8 9.8 24.0 7.7 S S S
Rail 25.0 9.7 25.4 8.7 26.4 6.0 20.9
All other Single modes S S S S S S S
Multiple modes 45.0 1.0 47.7 1.2 46.7 3.5 S
Parcel, USPS or courier S S S S S S S
All other multiple modes 45.9 1.0 47.7 1.2 46.7 3.5 27.0
Other and unknown modes S S S S S S S

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 – 26.3 – 27.8 – 12.0
Single modes 31.5 7.6 26.5 0.9 28.2 0.9 14.7
Truck 33.3 7.6 28.1 6.6 36.9 8.3 15.9
Rail 43.1 3.5 44.4 4.8 42.5 6.8 30.3
All other Single modes 35.9 0.4 40.5 3.7 S S 29.8
Multiple modes 41.0 7.6 32.0 0.7 39.2 0.6 9.3
Parcel, USPS or courier 42.0 7.4 S S S S 9.3
All other multiple modes S S 49.8 0.6 S S 31.7
Other and unknown modes 46.5 0.3 S S S S 40.2

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 29.9 – 23.1 – 18.7 – 6.6
Single modes 31.7 1.4 23.2 0.5 18.1 0.7 6.3
Truck 33.6 2.9 16.4 5.5 12.3 7.6 6.6
Rail 33.3 2.3 48.8 5.6 45.7 7.3 38.5
All other Single modes S S S S S S 23.7
Multiple modes 21.1 1.5 49.8 0.3 49.9 0.8 8.0
Parcel, USPS or courier 21.8 1.5 15.7 0.1 20.9 0.2 8.0
All other multiple modes S S S S S S 26.1
Other and unknown modes 36.6 0.6 S S 43.2 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 S S 26.6 – 39.2 – 16.3
Single modes S S 26.5 0.5 38.9 1.0 21.1
Truck S S 30.6 6.0 47.5 6.7 22.0
Rail 36.9 0.5 36.7 0.9 36.6 1.4 13.9
All other Single modes S S 42.5 5.5 50.0 6.2 7.0
Multiple modes 42.1 4.1 47.4 0.5 S S 8.2
Parcel, USPS or courier 49.6 4.3 21.8 0.5 24.2 0.7 8.2
All other multiple modes S S S S S S 22.4
Other and unknown modes 32.1 0.7 36.6 0.2 30.0 0.1 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 26.1 – 21.9 – 20.0 – 10.5
Single modes 33.4 9.0 23.3 4.4 21.5 3.5 27.8
Truck 33.8 9.3 23.4 5.2 21.9 5.6 24.2
Rail S S S S S S 29.9
All other Single modes 47.5 0.3 35.3 – 44.6 – 16.5
Multiple modes S S 36.1 4.5 27.5 3.6 9.9
Parcel, USPS or courier S S 40.4 4.5 36.8 3.8 9.8
All other multiple modes S S S S S S 29.8
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 18.0 – 17.1 – 21.0 – 13.3
Single modes 19.3 2.9 18.4 3.5 25.9 5.7 17.8
Truck 19.3 2.8 17.1 3.6 26.3 6.0 18.7
Rail 30.2 – 44.8 0.5 S S 25.7
All other Single modes 34.3 – S S S S 21.0
Multiple modes 24.3 2.8 32.3 3.6 27.2 5.9 7.4
Parcel, USPS or courier 27.2 2.6 38.9 0.4 44.2 0.9 7.6
All other multiple modes 33.5 0.5 35.3 3.7 30.1 6.0 20.1
Other and unknown modes 42.3 1.0 S S 33.0 0.5 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 37.4 – S S 34.3 – S
Single modes 46.2 10.5 S S 40.6 9.8 S
Truck 46.2 10.5 S S 40.6 9.8 S
Rail S S S S S S 31.6
All other Single modes – – – – – – –
Multiple modes S S S S S S 29.4
Parcel, USPS or courier S S S S S S 29.4
All other multiple modes – – – – – – –
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.