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]

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 10.4 21.7 13.1 11.0
Single modes 11.3 1.9 21.0 0.9 13.5 0.6 8.9
Truck 12.5 2.3 21.7 1.3 15.4 3.5 9.7
Rail 32.1 1.4 33.6 1.2 31.7 3.4 16.0
All other Single modes S S S S S S 6.3
Multiple modes 16.9 1.8 13.6 15.5 0.4 10.3
Parcel, USPS or courier 17.2 1.8 14.2 13.8 0.2 10.3
All other multiple modes 40.8 28.2 29.3 0.3 13.0
Other and unknown modes 29.4 0.6 S S 34.9 0.4 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 31.9 22.5 27.6 17.3
Single modes 32.0 1.1 22.1 0.8 28.2 1.7 35.7
Truck 32.1 1.0 21.6 2.0 26.1 3.2 35.8
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 20.2
Parcel, USPS or courier S S S S S S 16.3
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 32.9

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 18.6 20.6 19.2 47.8
Single modes 18.7 0.9 20.6 0.2 19.2 0.2 29.7
Truck 18.7 0.9 20.7 0.5 19.2 0.2 29.7
Rail S S S S S S 37.1
All other Single modes
Multiple modes 42.6 0.9 44.1 0.2 43.4 0.2 24.8
Parcel, USPS or courier 43.9 0.8 41.5 43.3 0.2 24.8
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 31.6

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 29.1 35.9 32.0 36.6
Single modes 27.6 1.1 33.7 1.5 31.2 1.0 36.0
Truck 28.4 2.1 34.5 2.4 33.0 9.1 36.5
Rail S S S S S S 31.6
All other Single modes
Multiple modes
Parcel, USPS or courier
All other multiple modes
Other and unknown modes S S S S 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 33.7 48.8 S S 25.0
Single modes 33.7 48.8 S S 25.1
Truck 33.7 48.8 S S 25.1
Rail
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 29.8

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 16.2 25.8 29.8 11.1
Single modes 16.9 3.7 26.6 1.5 30.8 1.8 14.1
Truck 17.4 3.4 28.4 3.0 37.8 7.5 14.1
Rail 42.6 0.7 43.5 2.8 45.1 7.6 25.2
All other Single modes S S S S S S 30.0
Multiple modes 25.7 2.1 35.3 1.1 38.9 1.4 12.6
Parcel, USPS or courier 25.3 2.1 33.2 0.9 25.0 0.8 12.6
All other multiple modes S S S S S S 27.5
Other and unknown modes S S 44.6 0.7 S S 26.6

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 15.4 12.4 11.5 11.5
Single modes 16.3 1.5 13.2 1.4 11.8 1.1 9.5
Truck 17.8 4.2 15.1 3.6 10.6 5.3 12.4
Rail 46.1 1.6 41.5 3.3 46.9 4.7 12.4
All other Single modes S S S S S S 30.5
Multiple modes 15.1 1.4 11.0 0.3 27.1 0.9 11.7
Parcel, USPS or courier 15.3 1.4 14.7 0.3 19.0 0.4 11.7
All other multiple modes 47.8 0.2 S S S S 29.3
Other and unknown modes 21.4 0.3 31.3 1.3 32.3 0.4 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 20.5 27.8 42.7 9.9
Single modes 21.8 4.3 28.3 0.8 43.9 1.2 14.3
Truck 22.0 4.9 28.7 1.3 45.3 4.4 15.4
Rail S S S S S S 36.4
All other Single modes 37.5 0.6 35.7 34.8 0.1 39.1
Multiple modes 36.6 4.1 45.0 0.6 S S 13.7
Parcel, USPS or courier 37.8 4.1 41.8 0.4 40.6 0.3 13.6
All other multiple modes S S S S S S 29.8
Other and unknown modes S S 45.6 0.4 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 17.5 26.4 26.8 11.7
Single modes 21.0 4.2 27.4 2.0 28.8 3.9 18.1
Truck 24.4 7.9 32.2 9.4 36.1 9.2 17.5
Rail 40.6 6.0 49.4 8.5 47.1 8.8 25.3
All other Single modes S S 26.8 0.2 42.0 0.5 5.4
Multiple modes 33.5 4.5 32.4 1.8 24.8 3.3 10.2
Parcel, USPS or courier 33.6 4.5 33.3 1.5 29.6 2.3 10.1
All other multiple modes S S S S S S 30.4
Other and unknown modes 46.9 2.1 48.8 1.6 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 21.0 24.3 13.0 10.9
Single modes 23.8 2.7 21.7 1.8 14.8 2.9 20.5
Truck 24.5 3.4 23.4 3.3 11.6 5.3 20.4
Rail S S S S S S 28.3
All other Single modes S S S S S S 26.0
Multiple modes 18.0 2.7 17.9 0.6 27.2 2.4 9.1
Parcel, USPS or courier 18.0 2.7 17.9 0.6 27.2 2.4 9.1
All other multiple modes S S S S S S 31.6
Other and unknown modes 34.1 0.6 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 43.2 35.2 35.9 32.3
Single modes 45.9 3.2 35.5 0.7 36.0 0.4 30.9
Truck 45.9 3.2 35.5 0.7 36.0 0.4 30.9
Rail
All other Single modes
Multiple modes 45.3 3.2 S S S S 26.1
Parcel, USPS or courier S S 44.7 43.5 0.3 27.2
All other multiple modes S S S S S S 31.6
Other and unknown modes

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.