USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

GTFS Methodology

Wednesday, June 26, 2024

The online version of Government Transportation Financial Statistics (GTFS) has been replaced by the new Transportation Public Finance Statistics (TPFS) pages. This page is being reserved for historical purposes. In addition, please visit Rosa P for earlier additions of the Government Transportation Financial Statistics.

For information on concepts, definitions, and data sources used in GTFS, see Measurement of Government Transportation Financial Statistics 2012 (below). Note that the data tables in the 2012 publication are not current. Data through 2021 are available.

Edition updates:

In the 2012 publication, BTS deflated GTFS current-dollars using the overall Government expenditures and investment price index from the Bureau of Economic Analysis' (BEA) National Income and Product Accounts (NIPA) (Table 3.9.4 Line 1). Starting with the 2019 publication, the deflation method changed to use more detailed price indexes that better reflect and improve alignment with price movements at the transportation level by government. BTS now uses the government expenditures and investment (by function) price indexes for Federal transportation (NIPA Table 3.15.4 Line 19) and for State & Local transportation (NIPA Table 3.15.4 Line 31) for all chained-dollar tables. The resulting chained-dollar measures at the overall aggregate level (Federal combined with State & Local) now reflect the use of the Fisher ideal chained quantity index.