Table 2 Shipment Characteristics by Total Modal Activity for the United States: 2007
Table 2 Shipment Characteristics by Total Modal Activity for the United States: 2007
Estimates are based on preliminary data from the 2007 Commodity Flow Survey. Because of rounding, estimates may not be additive
| Mode of transportation (1) | 2007
Ton-miles (2) (millions) |
2007 Average miles per shipment | Ton-miles CV (3) | Average miles per shipment CV |
|---|---|---|---|---|
| All modes | 3,490,806 | 577 | 3.7 | 1.9 |
| Truck | 1,400,654 | 186 | 1.8 | 3.3 |
| Rail | 1,496,353 | 842 | 6.5 | 2.9 |
| Shallow draft | 283,519 | 222 | 7.0 | 9.4 |
| Great Lakes | 41,066 | 429 | 29.6 | 9.8 |
| Deep draft | 100,534 | 1,597 | 14.1 | 5.3 |
| Air (included truck and air) | 4,166 | 1,154 | 15.4 | 2.2 |
| Pipeline (4) | S | S | S | S |
| Parcel, U.S.P.S. or courier | 29,426 | 911 | 3.1 | 1.5 |
| Other and unknown modes | 41,271 | 103 | 7.9 | 11.0 |
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.
NOTE: 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and are subject to change; they will be superseded by data released in later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.census.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, Preliminary Release, December 2008.