add Atlanta to list of deployments

docs/Deployments.md

@@ -20,6 +20,7 @@ The following are known deployments of OTP in a government- or agency-sponsored
 * **Trento Province, Italy** - [ViaggiaTrento](https://play.google.com/store/apps/details?id=eu.trentorise.smartcampus.viaggiatrento) and [ViaggiaRovereto](https://play.google.com/store/apps/details?id=eu.trentorise.smartcampus.viaggiarovereto)
   were implemented as part of the [SmartCampus Project](http://www.smartcampuslab.it), a research project founded by [TrentoRise](http://trentorise.eu), [UNITN](http://www.unitn.it), and [FBK](http://www.fbk.eu).
 * **University of South Florida** (Tampa, Florida). The [USF Maps App](https://maps.usf.edu/) is a responsive web application for that helps university students, staff, and visitors find their way around the campus using multiple modes of transportation, including the USF Bull Runner campus shuttle, Share-A-Bull bike share, and pedestrian pathways. Open-sourced [on Github](https://github.com/CUTR-at-USF/usf-mobullity).
+* **Atlanta, Georgia** the Metropolitan Atlanta Rapid Transit Authority's (MARTA) [trip planner](http://itsmarta.com/planatrip.aspx) and the Atlanta region's transit information hub [atltransit.org](https://atltransit.org/) both use OTP to power their website trip planners.
 
 ## Independent Production