[Estimates are based on final data from the 2007 Commodity Flow Survey. Because of rounding, estimates may not be additive]
(Based on Great Circle Distance)
|Value CV3||Tons CV||Ton-miles CV|
|Less than 50 miles||3,851,545||6,948,743||156,161||1.4||2.1||2.6|
|50 - 99 miles||1,074,137||1,255,189||122,646||1.6||3.2||3.5|
|100 - 249 miles||1,777,031||1,585,315||374,666||1.3||3.2||4.3|
|250 - 499 miles||1,606,034||1,064,455||529,308||1.8||3.4||3.3|
|500 - 749 miles||1,019,498||618,981||533,163||1.6||3.5||3.6|
|750 - 999 miles||720,623||517,669||616,594||2.4||9.7||9.7|
|1,000 - 1,499 miles||730,366||397,272||624,921||2.3||7.6||7.4|
|1,500 - 2,000 miles||494,992||95,511||207,175||4.5||5.1||4.4|
|More than 2,000 miles||410,646||60,290||180,023||4.7||5.6||6.8|
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.
3 Coefficient of Variation.
NOTES: Value-of-shipment estimates are reported in current prices. Estimated measures of sampling variability for each estimate known as coefficients of variation (CV) are also provided in these tables. 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.