My caller ID showed this number as "N11 Code GA".  According to Wikipedia - This statewide Georgia Navigator system provides traffic, MARTA/GRTA and other public transport, rideshare, Clean Air Campaign, Atlanta and Savannah airport, Amtrak, Greyhound, weather and tourism information in an interactive voice response (IVR) format. Callers are also given the option of connecting to live operators at the Georgia Department of Transportation's Transportation Management Center in Atlanta. Connecting to operators allows users to report traffic accidents to the Georgia State Patrol or local police or sheriffs, or request motorist assistance from the Highway Emergency Response Operators (HERO) program. Callers can also connect to adjacent states' 5-1-1 systems, including North Carolina's.
In January 2011, the Georgia Department of Transportation launched a mobile application on the iPhone platform to provide iPhone users with a mobile option for up to the minute traffic information found on the website. The application also provides special offers and other information about businesses and organizations who participate in the program.
Georgia actually had a system for years before this, using only live operators, and the code *DOT (*368), which could not necessarily be used by those mobile phone users who were roaming from elsewhere, as these codes are specific to each phone company. A local 404 number in metro Atlanta and a toll-free 800 number were used for these and landline calls, and still serve as backup for mobile providers that fail to connect.