[Estimates are based on data from the 2007 and 2002 Commodity Flow Surveys. Because of rounding, estimates may not be additive]
|Mode of transportation1||Ton-miles2||Percent change||Average miles per shipment||Percent change||Ton-miles CV3||Ton-miles Std. error of % change||Average miles CV||Avg. miles Std. error of % change|
|Parcel, U.S.P.S. or courier||27,852||19,004||46.6||971||894||8.7||3||4.2||7.6||2.3||2.3||3.6|
|Other and unknown modes||33,510||44,253||-24.3||112||130||-13.7||9.3||9.7||10.3||12.7||13||15.7|
KEY: S = Estimate does not meet publication standards because of high sampling variability or poor response quality.
1 Estimates represent activity for a given mode across single
and multiple mode shipments. For example, "Truck" ton-miles
includes total ton-miles for shipments moving only by truck plus ton-miles
for truck segments of multiple mode shipments.
2 Ton-miles estimates are based on estimated distances traveled along a modeled transportation network.
3 Coefficient of Variation.
4 Estimates exclude shipments of crude petroleum (SCTG 16).
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.