They’ve done the reverse-flow thing in the past on the Turnpike, and may do so again tomorrow (though I’m not seeing any announcements about that so far)... there are few arterial roads down there, so any equipment that needs to be staged has to use I-95 or the Turnpike (or Alligator alley, I suppose).
But yeah - they learned that trick back with Andrew.
One thing that _has_ been done on the major Fla highways is that tolls have been suspended and and construction barriers have been cleared. So there’s something, I guess.