The Georgia Department of Transportation plans, constructs, maintains and improves the state's road and bridges; provides planning and financial support for other modes of transportation such as mass transit and airports; provides airport and air safety planning; and provides air travel to state departments. The Department also provides administrative support to the State Road and Tollway Authority and the Georgia Rail Passenger Authority.
A majority of the Department's resources are directed toward maintaining and improving the state's network of roads and bridges. Proceeds from the state's motor fuel taxes are constitutionally earmarked solely for use on Georgia's roads and bridges. Non-road and bridge construction projects are supported by a combination of state general funds, federal funds and local funds.
The Department is responsible for waterways, including the intercoastal waterway and the Savannah and Brunswick ports. Additionally, the department is responsible for rail transit.