Two websites currently serve as the primary global directories of publicly accessible data:
* GTFS Data Exchange
 * Public Feeds wiki page on Google Transit Data Feed Google Code project 
Transit agencies with GTFS data should consider making this data public to best leverage their investment and maximize the availability of applications based on their GTFS data<ref>[https://www.dropbox.com/s/jq2ko64j2eth5mt/The%20Many%20Uses%20of%20GTFS%20Data%20%E2%80%93%20Opening%20the%20Door%20to%20Transit%20Applications-postTRB4%20-%20changes%20accepted.docx?dl=0 The Many Uses of GTFS Data]</ref>. The data can be made available on the websites listed above, as well as at the individual agency websites. Trinity Transit<ref>[http://www.trinitytransit.org/gtfs/ Trinity Transit. "Google Maps and Mobile Applications."]</ref> is an example of a small agency that has chosen to make GTFS publicly available through its website, as has HART<ref>[http://www.gohart.org/developers/ Hillsborough Area Regional Transit. "Build your own HART apps."]</ref> and Pinellas Suncoast Transit Authority (PSTA) in the St. Petersburg/Clearwater area of Florida<ref>[http://www.psta.net/developers/ Pinellas Suncoast Transit Authority. "PSTA Developer Resources."]</ref>.