[Estimates are based on data from the 2007 and 2002 Commodity Flow Surveys. Because of rounding, estimates may not be additive]
(Based on Great Circle Distance)
|Value (percent)||Tons (percent)||Ton-miles2 (percent)||Value Standard Error %||Tons Standard Error %||Ton-miles Standard Error %|
|Less than 50 miles||33.0||29.8||55.4||54.1||4.7||4.1||0.4||0.4||0.7||1||0.2||0.2|
|50 to 99 miles||9.2||9.0||10.0||10.1||3.7||3.5||0.1||0.2||0.4||0.5||0.2||0.2|
|100 to 249 miles||15.2||15.8||12.6||12.7||11.2||10.5||0.2||0.3||0.4||0.4||0.6||0.4|
|250 to 499 miles||13.7||14.5||8.5||9.3||15.8||17.0||0.2||0.2||0.3||0.4||0.7||0.8|
|500 to 749 miles||8.7||10.1||4.9||5.2||15.9||16.1||0.1||0.3||0.1||0.2||0.4||0.6|
|750 to 999 miles||6.2||6.5||4.1||3.7||18.4||16.3||0.1||0.2||0.3||0.2||1.1||0.7|
|1,000 to 1,499 miles||6.3||6.0||3.2||3.6||18.7||21.0||0.1||0.2||0.2||0.4||0.9||1.7|
|1,500 to 1,999 miles||4.2||4.2||0.8||0.9||6.2||6.9||0.2||0.2||-||-||0.3||0.4|
|2,000 miles or more||3.5||4.0||0.5||0.4||5.4||4.5||0.2||0.2||-||-||0.3||0.2|
KEY: - = Zero or Less than half the unit shown; thus, it has been rounded to zero.
1 Shipments are grouped into distance categories based on
Great Circle Distance (GCD). GCD is the shortest distance between 2 points on
the surface of a sphere over the surface of that sphere.
2 Ton-miles estimates are based on estimated distances traveled along a modeled transportation network.
NOTES: Value-of-shipments estimates are reported in current prices. More information on sampling error, confidentiality protection, nonsampling error, sample design, and definitions may be found at http://www.bts.gov/cfs.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2007 Economic Census: Transportation Commodity Flow Survey, December 2009.