[Estimates are based on the Commodity Flow Survey. Because of rounding, estimates may not be additive]
|Mode of transportation1||Ton-miles2
|Average miles per shipment 2002|
|Parcel, USPS or courier||S||S||S|
|Other and unknown modes||327||0.5||S|
– 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.
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. See "Mileage Calculations" section for additional information.
3 Estimates exclude shipments of crude petroleum (SCTG 16).
NOTES: The Introduction and appendixes
give information on 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.
Coverage for the 2002 Commodity Flow Survey (CFS) differs from the previous surveys due to a change from the 1987 Standard Industrial Classification System to the 1997 North American Industry Classification System and other survey improvements. Therefore, data users are urged to use caution when comparing 2002 CFS estimates with estimates from prior years.
SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Individual State Data, December 2004.