General Transit Feed Specification (GTFS)
The MARTA GTFS feed is updated approximately four times per year, which is about how often MARTA service changes. It will be published to the same URL with each new update.
- google_transit.zip (11MB, ZIP) Effective Date:1/16/2014
There are a number of resources for GTFS, the standardized data format for transit schedules originally developed for use on Google Transit. A good starting point is the official documentation maintained by Google. The site includes reference, examples, tools, and community listservs.