I-10 West from Lake City/I-75 to Tallahassee is busy - very slow near the capital.
I-95 shows orange/red between Brunswick Savannah and I-26 in S. Carolina; I-26 toward Columbia is similarly slowed.
I-75 from about Tifton to Atlanta is also slow and go.
Has anyone considered Rte. 19 (I think it’s also Rte. 98 for a while) on the west side? My niece is going to the panhandle via that route and it looks pretty clear. Not interstate, but maybe that’s not a bad thing.