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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Table B-1b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Mode of Transportation for the United States: 2012 and 2007

Monday, July 13, 2015

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(Estimates are based on data from the 2012 and 2007 Commodity Flow Surveys)

Mode of transportation Value Tons Ton-miles (1) Average miles per shipment
Coefficient of variation of number Standard error of percent change Coefficient of variation of number Standard error of percent change Coefficient of variation of number Standard error of percent change Coefficient of variation of number Standard error of percent change
2012 2007 2012 2007 2012 2007 2012 2007
All modes 3.1 2.6 6.5 3.7 3.3 5.8 6.2 4.6 7.4 7.8 8.1 13.4
Single modes 3.1 2.4 6.6 3.7 3.2 5.9 6.0 4.1 7.2 7.4 8.6 11.9
Truck (2) 3.6 3.4 8.7 3.7 5.4 8.3 6.0 6.5 8.2 6.2 9.4 10.8
 For-hire truck 4.5 5.9 17.9 4.9 6.5 14.6 5.0 8.2 9.4 8.3 20.1 15.2
 Private truck 7.6 5.5 11.7 7.5 7.4 9.6 11.2 9.3 12.3 9.1 4.5 10.3
Rail 7.7 8.2 12.9 6.2 10.4 10.3 6.9 8.0 9.7 2.9 11.2 16.1
Water 24.3 15.9 91.2 28.2 13.3 59.0 17.4 15.2 34.2 15.6 22.8 15.3
 Inland water 26.3 19.0 97.0 30.6 16.1 62.9 28.7 26.3 48.0 S S S
 Great Lakes 0.0 S S 0.0 S S 0.0 S S 0.0 S S
 Deep sea 38.0 13.2 123.1 36.9 13.8 73.4 36.7 23.2 57.9 25.7 16.5 30.3
 Multiple waterways 44.0 X X 42.7 X X 43.8 X X S X X
Air (includes truck and air) 12.8 34.9 93.9 29.3 S S 38.4 S S 8.7 7.5 11.8
Pipeline (3) 9.3 5.7 15.0 11.0 5.3 12.2 S S S S S S
Multiple modes 15.6 12.5 8.4 30.9 13.5 8.3 45.8 14.4 35.7 6.2 5.4 6.4
Parcel, U.S. Postal Service, or courier 11.0 19.4 30.0 9.0 16.7 24.5 10.4 28.9 36.2 6.2 5.6 6.5
Truck and rail 14.5 16.8 42.0 15.6 16.2 32.7 14.0 18.2 37.7 9.2 11.2 17.8
Truck and water S 24.8 S S 23.5 S S 20.1 S 14.1 28.4 37.1
Rail and water 30.6 20.4 17.7 42.5 19.1 37.3 33.3 24.1 19.3 S 22.6 S
Other multiple modes 0.0 20.3 0.0 0.0 19.9 0.0 0.0 25.6 0.0 0.0 13.8 0.0
Other modes 0.0 9.2 0.0 0.0 10.8 0.0 0.0 24.6 0.0 0.0 26.8 0.0

KEY: S = Withheld because estimate did not meet publication standards.

X = Not applicable.

(1) Ton-miles estimates are based on estimated distances traveled along a modeled transportation network. See “Mileage Calculations” section for additional information.

(2) “Truck” as a single mode includes shipments that were made by only private truck or only for-hire truck.

(3) 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/econ/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.