75 is the easiest. Go non-rush hour. You will find fairly regular traffic from 575 south to the perimeter. I will ease up there. Just keep off the right lane and certainly the left. Left lane will suddenly end up and ramp and then dead end on the bridge into the road crossing the interstate.
Try to stay with the traffic and watch as far ahead as you can see. changing lanes constantly is not a good idea and some of our troopers working the traffic there will remind you.
We have some interesting things in Atlanta, but nothing worth slowing down and getting hit from the rear when trying to see them.