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Transportation Services Index

The most recent data are from February 2014.


NOTE: TSI is updated monthly. The index numbers for the latest three months are considered to be preliminary. BTS releases the preliminary number for the latest month and replaces the number for the oldest preliminary month with a revised number. Seasonal adjustment models for the modal data have been updated for the data January 2000 to the present. The earlier data (January 1990 to December 1999) were adjusted with the older seasonal adjustment models, which may result in a discontinuity in the time series.

TSI numbers are BTS estimates.

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