Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

 Find the latest Coronavirus-related transportation statistics on the BTS COVID-19 landing page.

United States Department of Transportation United States Department of Transportation

Table B-2b. Estimated Measures of Reliability for Export Shipment Characteristics by Domestic Mode: 2002 and 1997

Monday, July 2, 2012

Table B-2b. Estimated Measures of Reliability for Export Shipment Characteristics by Domestic Mode: 2002 and 1997

[Estimates are shown as percents and are based on data from the 2002 and 1997 Commodity Flow Surveys]

Excel | CSV

Domestic mode of transportation Value Tons Ton-miles
CV 02 CV 97 Std. error of percent change 1997-2002 CV 02 CV 97 Std. error of percent change 1997-2002 CV 02 CV 97 Std. error of percent change 1997-2002
All modes 4.9 3.8 6.6 11.8 7.3 15.2 15.0 13.2 22.6
Single modes 5.8 5.1 9.1 12.4 8.1 21.4 15.2 15.2 26.8
Truck 5.9 5.6 9.5 11.1 6.9 21.1 26.0 13.3 52.3
Rail 6.3 30.1 24.8 13.6 14.0 17.8 16.1 21.1 26.2
Water 20.2 16.4 39.0 21.4 16.1 51.6 17.5 15.5 23.0
Air (including truck and air) 9.9 24.6 35.0 24.1 16.0 42.7 31.5 31.0 101.8
Pipeline S S S S S S S S S
Multiple modes 7.4 8.0 13.4 14.5 10.7 19.2 19.3 14.2 28.6
Parcel, U.S.P.S. or courier 8.1 11.5 19.9 7.8 11.4 21.1 14.4 15.9 65.5
Truck and rail 10.4 8.9 10.3 15.8 7.9 19.6 6.4 7.2 9.7
All other multiple modes 28.9 19.9 114.0 26.3 23.9 34.7 38.4 30.4 69.5
Other and unknown modes 16.4 6.5 3.7 21.1 19.2 2.1 22.2 18.8 3.6

KEY:
– Represents an estimate 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.
CV Coefficient of variation of number

NOTE: 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: Research and Innovative Technologies Administration, Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Export Data, March 2005.