I came straight through on I-75 8 days ago arriving at the south I-285 bypass at 7:45 PM. Got on I-575 (30 miles) at 8:15... average 60 mph. Traffic only slowed for a couple miles downtown and before 14th st north you need to be in one of the three right lanes as the three left for I-85 are closed shortly after 14th.
If you have two people and are willing to hammer down (you speed up when you get to Atlanta) you can use the left HOV lane (lane 7) and after downtown there is no need to merge to the right as the HOV lane has an exit to the left for I-75 north that you can take at 65 mph.
This post is my opinion (free advice). It is not intended to influence anyone's judgment nor do I advocate anyone do what I propose.
Sold 04 Dynasty to our son after 14 great years.
Upgraded with a 08 HR Navigator 45โ...