The Transportation Services Index (TSI) is a monthly measure of the volume of services performed by the for-hire transportation sector. The TSI tells us how the output of transportation services has increased or decreased from month to month.
Index: 2000 = 100
|TSI total||TSI freight||TSI passenger|
NOTE: March 2008-June 2008 data are preliminary.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Transportation Services Index, available at http://www.bts.gov/ as of August 2008.