Yeah - people should really stay off I-75. It's overloaded. IMHO, if you want to get out of the south, it looks like your choices are either bad traffic (I-75), state roads, or heading due north (potentially staying overnight there), then tacking west as much as you feel the need to.
Interesting that I-10 is still all green. I guess that not many people are turning west when they hit it, everyone's heading to Atlanta?
Ed: As I sit here and watch it, I-75 keeps getting worse. The patches of green keep getting smaller :Þ Don't take I-75, people....