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API
Transportation Services Index and Seasonally-Adjusted Transportation Data
data.bts.gov | Last Updated 2024-06-13T15:00:20.000Z
About Transportation Services Index 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. For charts and discussion on the relationship of the TSI to the economy, see our Transportation as an Economic Indicator: Transportation Services Index page (https://data.bts.gov/stories/s/TET-indicator-1/9czv-tjte) For release schedule see: https://www.bts.gov/newsroom/transportation-services-index-release-schedule About seasonally-adjusted data Statisticians use the process of seasonal-adjustment to uncover trends in data. Monthly data, for instance, are influenced by the number of days and the number of weekends in a month as well as by the timing of holidays and seasonal activity. These influences make it difficult to see underlying changes in the data. Statisticians use seasonal adjustment to control for these influences. Controlling of seasonal influences allows measurement of real monthly changes; short and long term patterns of growth or decline; and turning points. Data for one month can be compared to data for any other month in the series and the data series can be ranked to find high and low points. Any observed differences are “real” differences; that is, they are differences brought about by changes in the data and not brought about by a change in the number of days or weekends in the month, the occurrence or non-occurrence of a holiday, or seasonal activity.
API
Docked Bikeshare Trips: Largest 6 Systems
data.bts.gov | Last Updated 2024-06-04T18:29:38.000Z
The Bureau of Transportation Statistics calculates this value using system data provided by CitiBike NY/JC (New York, NY and Jersey City, NJ), Capital Bikeshare (Washington, DC area), Divvy (Chicago, IL), Bay Wheels (San Francisco, CA), and Blue Bikes (Boston, MA area).

Transportation Services Index and Seasonally-Adjusted Transportation Data

Docked Bikeshare Trips: Largest 6 Systems