With rebuilding came the rigid segregation of the post-Reconstruction era, shutting African Americans out of white Atlanta for decades. Anchoring its economic renaissance has been the king of fizz, Coca Cola. There are five Greyhound buses per day to Savannah and eight daily to Chattanooga, Tennessee. For those traveling further afield there are several buses a day to New Orleans, Miami, Washington DC, and New York. Amtrak's Crescent passes through Atlanta daily between New York and New Orleans.
Taxis are relatively easy to secure and there are several major car rental agencies at the airport.
Transfers between the two systems are free. Taxis are not easily available unless ordered by phone. Unless you're going as far as Savannah, driving isn't recommended as the freeways and city streets can be confusing and are clogged during rush hours. A City of the Modern South , is still worth a read. David Goldman and Pam Perry's Insiders' Guide to Metro Atlanta pretty much covers it all.