Home » BTS Publications » Commodity Flow Survey » 2002 » Metropolitan Areas

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 16.9 – 34.6 – 24.3 – 11.9
Single modes 19.8 2.8 36.2 2.6 27.0 4.5 18.2
Truck 20.9 3.0 27.9 3.8 28.3 5.4 19.8
Rail 34.3 1.3 S S 29.6 4.5 S
All other Single modes 23.4 0.2 S S S S 4.0
Multiple modes 14.3 2.7 27.8 0.2 36.0 1.5 8.0
Parcel, USPS or courier 15.5 2.8 20.7 0.1 26.3 0.5 8.0
All other multiple modes S S 48.4 0.2 S S S
Other and unknown modes 26.9 0.5 44.3 2.6 39.9 4.4 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 S S S S S S 37.3
Single modes S S S S S S 36.8
Truck S S S S S S 36.8
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S 27.8
Parcel, USPS or courier S S S S S S 27.8
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 24.5 – 25.8 – 29.2 – S
Single modes 24.5 1.2 25.9 0.5 29.4 1.0 S
Truck 24.5 1.2 25.9 0.5 29.4 1.0 S
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S 33.0
Parcel, USPS or courier S S S S S S 33.0
All other multiple modes – – – – – – –
Other and unknown modes – – – – – – –

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 20.1 – 30.4 – 28.5 – 26.0
Single modes 20.6 1.4 31.7 4.5 29.0 1.4 32.5
Truck 15.4 5.6 33.4 6.8 30.3 5.2 30.3
Rail S S S S S S 27.2
All other Single modes S S S S S S S
Multiple modes S S S S S S 31.4
Parcel, USPS or courier S S S S S S 31.4
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 29.3

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 17.6 – 18.2 – 19.4 – 25.4
Single modes 17.6 – 18.2 – 19.4 – 25.4
Truck 17.6 – 18.2 – 19.4 – 26.4
Rail – – – – – – –
All other Single modes S S S S S S 31.6
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
All other multiple modes – – – – – – –
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 14.1 – S S 47.5 – 11.8
Single modes 14.7 2.5 S S 49.4 3.2 18.7
Truck 15.7 3.2 S S S S 18.2
Rail S S S S S S 29.0
All other Single modes 48.1 0.5 34.8 – 48.8 – 20.5
Multiple modes 19.3 2.8 45.6 1.1 S S 10.2
Parcel, USPS or courier 21.6 3.0 21.1 0.8 22.9 1.2 10.2
All other multiple modes S S S S S S 25.9
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 27.3 – 38.3 – 33.7 – 16.7
Single modes 32.5 5.8 20.0 9.6 32.3 6.3 21.7
Truck 32.8 6.2 22.0 8.7 35.9 7.8 22.3
Rail 47.2 1.2 42.5 4.2 S S 28.5
All other Single modes S S S S S S 28.9
Multiple modes 38.3 5.1 22.7 0.6 36.3 1.3 16.4
Parcel, USPS or courier 38.3 5.1 22.7 0.6 36.3 1.3 16.4
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 26.6

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 8.3 – 17.9 – 34.7 – 10.2
Single modes 11.5 4.3 18.4 2.7 30.8 3.7 15.3
Truck 11.8 4.9 19.0 4.5 27.0 8.1 12.7
Rail 49.9 1.9 S S S S 26.2
All other Single modes 37.2 0.5 S S S S 5.2
Multiple modes 23.9 4.2 20.4 0.3 23.5 0.5 10.0
Parcel, USPS or courier 23.3 4.0 19.0 0.2 23.9 0.5 10.0
All other multiple modes S S S S S S 30.0
Other and unknown modes 32.1 1.3 S S S S 43.3

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 48.2 – 39.2 – 49.2 – 14.0
Single modes S S 41.1 2.8 S S 20.2
Truck S S 38.4 3.5 S S 20.2
Rail 42.0 1.5 S S S S 49.7
All other Single modes 39.2 0.9 39.8 0.1 33.0 0.4 14.5
Multiple modes 35.0 4.8 S S S S 7.8
Parcel, USPS or courier 26.7 4.3 S S S S 7.9
All other multiple modes S S S S S S S
Other and unknown modes 42.4 0.1 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 19.0 – S S 47.9 – 17.3
Single modes 21.8 6.1 S S S S 36.5
Truck 18.0 6.2 43.6 15.6 41.9 12.2 36.5
Rail S S S S S S S
All other Single modes S S 43.0 – 45.2 – 22.2
Multiple modes 37.4 6.0 29.3 0.8 30.0 1.6 8.3
Parcel, USPS or courier 37.4 6.0 29.3 0.8 30.0 1.6 8.3
All other multiple modes – – – – – – –
Other and unknown modes 37.6 0.3 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 S S 46.6 – 47.1 – 34.3
Single modes 48.7 18.9 46.8 10.6 48.9 12.5 S
Truck S S S S S S S
Rail S S S S S S 31.6
All other Single modes S S S S S S 40.2
Multiple modes S S S S S S 25.9
Parcel, USPS or courier S S S S S S 25.9
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.