2021 Time Series

The Time Series files present NTD data by year, as far back as achievable, to allow for series and trend analyses. There were no changes to the time series in 202 0other than to add the data from Report Year 2020.

As a reminder, effective with the 2017 release, the Time Series reflects data reported to the National Transit Database (NTD) by public transit operators in rural areas. To perform urban-only analysis, data users should filter the Reporting Module column of each tab to 'Urban' or filter the Primary Urbanized Area (UZA) column to '(Blanks)'.