4-3 Transportation Services Index (TSI): January 1990-August 2010
4-3 Transportation Services Index (TSI): January 1990-August 2010
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Seasonally Adjusted
Chain-type Index: 2000 = 100

Notes: June-August 2010 data are preliminary. The TSI total is a monthly measure of the volume of services provided by for-hire transportation industries in the United States using 2000 as the base year.
Source: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics (BTS), special calculation, available at http://www.bts.gov/xml/tsi/src/index.xml as of November 2010.