Estimates are based on preliminary data from the 2012 Commodity Flow Survey. Because of rounding, estimates may not be additive
Distance Shipped (1)
(Based on Great Circle Distance)
|Value (Percent of Total)||
|Tons (Percent of Total)||
2012 Ton–miles (2)
|Ton-miles (Percent of Total)||Value CV (3)||Standard Error for Value (Percent of Total)||Tons CV||Standard Error for Tons (Percent of Total)||Ton-miles CV||Standard Error for Ton-miles (Percent of Total)|
|Less than 50 miles||4,824,015||35.4||6,373,401||54.5||122,357||3.7||1.6||0.4||1.3||0.6||1.4||0.1|
|50 - 99 miles||1,372,770||10.1||1,221,032||10.4||110,986||3.3||2.1||0.2||5.2||0.6||5.4||0.2|
|100 - 249 miles||2,119,376||15.6||1,333,229||11.4||292,289||8.8||2.1||0.2||1.5||0.1||1.6||0.4|
|250 - 499 miles||1,741,948||12.8||993,733||8.5||498,435||15.0||2.0||0.2||3.8||0.3||4.1||0.5|
|500 - 749 miles||1,138,273||8.4||635,137||5.4||554,355||16.7||1.6||0.1||4.8||0.2||5.1||0.7|
|750 - 999 miles||777,507||5.7||514,480||4.4||604,435||18.2||1.2||0.1||8.5||0.4||8.6||1.0|
|1,000 - 1,499 miles||777,875||5.7||433,136||3.7||679,282||20.5||1.1||0.1||9.0||0.3||9.0||1.1|
|1,500 - 2,000 miles||478,377||3.5||139,191||1.2||312,315||9.4||3.6||0.1||10.8||0.1||10.7||1.0|
|More than 2,000 miles||394,917||2.9||52,123||0.4||145,212||4.4||4.2||0.1||5.1||Z||5.4||0.3|
Z - Less than half the unit shown. For the 2012 CFS, represents an estimate that is between zero and half the unit shown, thus, has rounded down 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.
(3) Coefficient of Variation.
NOTES: These data are preliminary and are subject to change; they will be superseded by data released in later reports. Value-of-shipment estimates have not been adjusted for price changes. 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.rita.dot.gov/bts/sites/rita.dot.gov.bts/files/publications/co....
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, 2012 Economic Census: Transportation Commodity Flow Survey, Preliminary Release, December 2013.