Transportation Services Index
Chain-type Index: 1996 = 100
Chain-type Index: 2000 = 100
The most recent data are from Mar 2005. (Release Dates)
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. All other revisions are held until an annual comprehensive revision of the TSI, which will be released as part of the following June TSI release.
SOURCES:
TSI numbers are BTS estimates.
Monthly Gross Domestic Product (GDP) Quantity Index numbers are BTS estimates based on Quarterly GDP data published by the Bureau of Economic Analysis (BEA).
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The Transportation Services Index (TSI), created by the U.S. Department of Transportation (DOT), Bureau of Transportation Statistics (BTS), measures the movement of freight and passengers. The index, which is seasonally adjusted, combines available data on freight traffic, as well as passenger travel, that have been weighted to yield a monthly measure of transportation services output.
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