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seasonal adjustment

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Air Traffic Methodology

Discussion of the method used by the Bureau of Transportation Statistics (BTS) to seasonally adjust BTS' air traffic data. Seasonal adjustment removes seasonal events that follow a regular pattern. Transportation is highly seasonal, and without adjustment, the data do not give an accurate picture...

Seasonally Adjusting Vehicle Miles Traveled

Return to the Bureau of Transportation Statistics' seasonally adjusted data homepage

For the most recent data and model used for seasonal adjustment, visit: https://data.bts.gov/Research-and-Statistics/Transportation-Services-Index-and-Seasonally-Adjus/bw6n-ddqk

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Seasonally-Adjusted Data: What it Really Means

Discussion on what it means when data are seasonally-adjusted and description about the advantages of using seasonally adjusted data to examine changes in data. The Bureau of Transportation Statistics’ airline data are used as an illustrative example. For the most recent data and model used for...

Seasonally-Adjusted Transportation Data

List of the Bureau of Transportation Statistics' seasonally adjusted data series. 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.