OneBusAway <ref>University of Washington. "OneBusAway - Where is your bus?". Accessed August 1, 2012 from http://onebusaway.org/</ref> is an open-source software system for real-time transit information that grew out of research at the University of Washington. The initial OneBusAway deployment was in the Puget Sound area in Washington, although OneBusAway has since been deployed to many other cities including Atlanta, San Diego, Tampa, Washington, D.C., with international deployments in York (Canada), Finland, and Poland <ref>OneBusAway. "OneBusAway Deployments." Accessed March 2, 2017 from http://onebusaway.org/onebusaway-deployments/</ref>. MTA in New York is using OneBusAway software as the foundation of their Bus Time system <ref>Metropolitan Transportation Authority. "MTA Bus Time(R)." Accessed August 1, 2012 from http://bustime.mta.info/</ref>.
OneBusAway uses General Transit Feed Specification data for the basic description of the transit system. Real-time information can be injected into the OneBusAway system using a variety of formats <ref>OneBusAway. "Real-Time Configuration Guide." Accessed March 2, 2017 from https://github.com/OneBusAway/onebusaway-application-modules/wiki/Real-Time-Data-Configuration-Guide</ref>, including GTFS-realtime, SIRI, and ACS Orbital Orbcad.
OneBusAway offers many native apps that are all open-source, including:
More information about deploying OneBusAway in your region is available at https://github.com/OneBusAway/onebusaway-application-modules/wiki.