Top Definition
the only highway in the state of Georgia with a toll, between Buckhead and the northern part of the I-285 loop. 50 cents. This highway was built in part to ease traffic for the 1996 olympics in Atlanta. This highway is notorious for rush hour traffic, the local TV stations call their traffic reports "Surviving GA 400"
Hey, you wanna blow 50 cents by driving on Georgia 400?
by McDizzle March 29, 2004
Also known as the Alpharetta Autobon. (Alpharetta is a city that 400 runs through). It's called an autobon cause nobody follows the speed limit on it. I admit I will fly down 400
Traffic is moving freely on the Alpharetta Autobon
by Blue Devil January 10, 2005
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