From Downtown Atlanta Follow I-20 W, I-285 N And I-75 N To Wade Green Rd In Cobb County. Take Exit 273 From I-75 N. Merge Onto I-20 W. Use The Right 2 Lanes To Take Exit 51B To Merge Onto I-285 N Toward Chattanooga/Greenville. Take The Exit Onto I-75 N Toward Chattanooga. Keep Left To Stay On I-75 N