It's possible. The Governor's Emergency Declaration gives DOT full authority to determine if that is needed. Driving between Jacksonville and Tallahassee on I-10, you'll see "Emergency Evacuation Route" signs posted for westbound traffic (facing east) on both east and westbound lanes. Just past the I-10 / I-75 intersection, there is an empty lane that provides for contraflow traffic in the eastbound lanes to re-enter the westbound lanes.
So that's what that lane is for.