My in-laws drove down ahead of us to spend a few days in St. Augustine before they meet us in Disney. They said the construction work was horrible from around Macon south to Florida. Several times came to a complete stop.
They also said to watch the speed. It's a reduced speed zone becaue of the construction and state troopers had people pulled over left and right for speeding - remember fine is doubled in a road work zone.
Everyone please have a safe trip!