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Transportation Services Index
The most recent available data are from
Jul 2004.
(Release Dates)
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NOTE: TSI numbers (Total, Freight, and Passenger) were revised because additional data became available for seasonality adjustments and revisions in the output data of the component transportation services. These changes have a larger impact on more recent numbers. In April 2004, the North American Industry Classification System (NAICS) replaced the Standard Industrial Classification (SIC) as the basis for GDP by industry as weights in aggregating individual indexes of transportation services by mode and type of services into composite indexes. SIC-based GDP by industry data will no longer be published by the Bureau of Economic Analysis (BEA). This change has a minor impact on individual numbers but almost no impact on the general trends of TSI.
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).
| 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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