USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

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 8.2 – 27.5 – 24.2 – 16.3
Single modes 10.8 6.1 27.8 0.7 24.6 1.3 25.6
Truck 10.7 5.8 27.9 0.8 25.6 2.0 29.7
Rail S S S S S S 29.7
All other Single modes 26.7 3.2 47.1 – 45.8 1.5 9.6
Multiple modes 26.0 6.2 37.5 0.2 30.8 0.9 18.4
Parcel, USPS or courier 26.0 6.2 36.6 0.2 30.9 0.9 18.4
All other multiple modes S S S S S S 31.1
Other and unknown modes 35.2 0.9 29.8 0.6 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 S S S S S S S
Single modes S S S S S S S
Truck S S S S S S S
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
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 30.5 – 41.0 – S S 21.7
Single modes 32.5 4.1 42.1 3.4 S S 21.5
Truck 32.5 4.1 42.1 3.4 S S 21.5
Rail – – – – – – –
All other Single modes – – – – – – –
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 46.0

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 12.4 – 21.9 – 14.5 – 27.2
Single modes 13.6 2.7 22.5 2.0 14.5 1.0 30.3
Truck 12.1 2.6 22.5 2.0 14.5 1.0 32.3
Rail – – – – – – –
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 31.6
Parcel, USPS or courier – – – – – – –
All other multiple modes S S S S S S 31.6
Other and unknown modes 44.5 2.7 S S S S 27.2

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 23.0 – 23.2 – 38.4 – 15.3
Single modes 23.0 – 23.2 – 38.4 – 17.0
Truck 23.0 – 23.2 – 38.4 – 17.0
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 – – – – – – –

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 28.3 – 29.3 – 37.2 – 29.5
Single modes 27.7 3.7 29.7 1.3 37.4 1.1 31.0
Truck 28.2 4.8 30.1 2.6 38.7 4.0 30.6
Rail S S S S S S 29.7
All other Single modes S S S S S S 26.1
Multiple modes S S S S S S 30.0
Parcel, USPS or courier S S S S S S 30.0
All other multiple modes – – – – – – –
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 34.5 – 22.3 – 47.3 – 18.5
Single modes 16.0 11.3 23.7 4.3 45.0 8.1 39.0
Truck 16.0 11.3 23.7 4.3 45.2 8.1 41.8
Rail – – – – – – –
All other Single modes S S S S S S 24.7
Multiple modes S S S S S S 26.1
Parcel, USPS or courier S S S S S S 26.4
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 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 26.6 – 49.0 – S S S
Single modes 25.4 4.3 49.2 2.8 S S S
Truck 25.5 4.2 49.2 2.8 S S S
Rail – – – – – – –
All other Single modes S S 41.8 – 46.4 0.1 22.0
Multiple modes S S 49.5 0.5 S S 36.2
Parcel, USPS or courier S S S S S S 36.2
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 28.9

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 12.2 – 41.0 – 27.7 – 25.1
Single modes 22.1 8.5 S S 40.5 8.9 S
Truck 37.8 8.5 S S 27.8 6.2 S
Rail – – – – – – –
All other Single modes 28.1 5.7 S S S S 10.4
Multiple modes 27.8 8.7 46.6 9.7 36.3 8.2 11.2
Parcel, USPS or courier 27.8 8.7 46.6 9.7 36.3 8.2 11.2
All other multiple modes – – – – – – –
Other and unknown modes 45.9 1.3 41.6 5.7 36.2 5.6 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 17.1 – 12.7 – 17.3 – 26.8
Single modes 18.2 2.5 12.7 0.1 17.5 0.7 27.7
Truck 18.3 2.5 12.7 0.1 17.4 0.8 20.8
Rail – – – – – – –
All other Single modes S S S S S S 27.4
Multiple modes 39.5 2.5 47.1 – 42.1 0.7 21.4
Parcel, USPS or courier 39.5 2.5 47.1 – 42.1 0.7 21.4
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 S S S S S S S
Single modes S S S S S S S
Truck S S S S S S S
Rail – – – – – – –
All other Single modes S S S S S S 44.6
Multiple modes S S 49.8 11.2 S S 31.5
Parcel, USPS or courier S S 49.8 11.2 S S 31.5
All other multiple modes – – – – – – –
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.