Table B-16. Estimated Measures of Reliability for Shipment Characteristics of Temperature Controlled Shipments (1) by Mode of Transportation for the United States: 2012
(Estimates are based on data from the 2012 Commodity Flow Survey)
Mode of transportation | Value | Tons | Ton-miles (2) | Average miles per shipment | |||
---|---|---|---|---|---|---|---|
Coefficient of | Standard error of percent of total | Coefficient of | Standard error of percent of total | Coefficient of | Standard error of percent of total | coefficient of | |
variation of number | variation of number | variation of number | variation of number | ||||
All modes | 3.2 | 0 | 2.3 | 0 | 2.1 | 0 | 6 |
Single modes | 2.7 | 0.8 | 2.2 | 0.2 | 2.1 | 0.3 | 5.4 |
Truck (3) | 2.9 | 0.7 | 2.3 | 0.7 | 2.6 | 1.2 | 4.6 |
For-hire truck | 4.7 | 1 | 4.8 | 1.7 | 3 | 1.2 | 7 |
Private truck | 3 | 1.2 | 3.8 | 1.7 | 2.7 | 0.5 | 2.7 |
Rail | 9.9 | 0.2 | 10.6 | 0.4 | 8 | 1 | 8.1 |
Water | 21.5 | 0.1 | 27.5 | 0.3 | 39.8 | 0.7 | 14.6 |
Inland water | 34.2 | 0.1 | 30.6 | 0.3 | S | S | 24.7 |
Great Lakes | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Deep sea | 20.7 | Z | 12.6 | Z | 22.5 | 0.1 | 14.6 |
Multiple waterways | 30.6 | Z | 44.8 | 0.1 | 27.4 | 0.1 | 32.1 |
Air (includes truck and air) | 7.4 | 0.1 | 37.2 | 0.1 | 46.8 | 0.4 | 11.1 |
Pipeline (4) | 33.2 | Z | 29.4 | 0.1 | S | S | S |
Multiple modes | 10.9 | 0.8 | 17.1 | 0.2 | 8.4 | 0.3 | 6.4 |
Parcel, U.S. Postal Service, or courier | 11.7 | 0.8 | 15.7 | Z | 16.9 | Z | 6.6 |
Truck and rail | 14.8 | 0.1 | 11.6 | 0.1 | 11.4 | 0.3 | 34.5 |
Truck and water | 19.4 | Z | 22.9 | Z | 16.1 | 0.1 | 17.5 |
Rail and water | S | S | S | S | 48 | 0.3 | S |
Other multiple modes | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Other modes | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
KEY: S = Withheld because estimate did not meet publication standards
Z = Rounds to zero.
(1) Shipments that are temperature controlled are transported in a vehicle or container that regulates or maintains the temperature when en route to its destination.
(2) Ton-miles estimates are based on estimated distances traveled along a modeled transportation network. See “Mileage Calculations” section for additional information.
(3) “Truck” as a single mode includes shipments that were made by only private truck or only for-hire truck.
(4) Estimates for pipeline 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>.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2012 Economic Census: Transportation Commodity Flow Survey, December 2014.