Transportation Economic Trends

Transportation as an Economic Indicator:

Seasonally-adjusted transportation data

Seasonal adjustment is the process of estimating and removing movement in a time series caused by regular seasonal variation in activity, e.g., an increase in air travel during summer months. Seasonal movement makes it difficult to see underlying changes in the data. Monthly shifts in data as well as short and long-term trends can be best seen through seasonally-adjusted data. This page features transportation data series seasonally-adjusted by the Bureau of Transportation Statistics. BTS uses seasonally-adjusted data in the Transportation Services Index.

Full data can be downloaded from the seasonally-adjusted data page

Recommended citation
U.S. Department of Transportation, Bureau of Transportation Statistics, Transportation Economic Trends, available at

Bureau of Transportation Statistics
The Bureau of Transportation Statistics, part of the U.S. Department of Transportation, is the preeminent source of statistics on commercial aviation, multimodal freight activity, and transportation economics, and provides context to decision makers and the public for understanding statistics on transportation.