Here is another one to consider. Use Heckscher Drive EB and it will turn NB into A1A and lead you into Fernandina Beach. From there you can cut back onto SR-200.
You could use Lem Turner Rd or New Kings Rd/US-1 to go to Callahan, then take SR-200 EB to merge back to 295. (Or vice versa for SB drivers) It all depends on where you are & where you are trying to go
The most direct detour is to use US-17. It runs parallel to 95, but this will also be the most congested!
Yesterday during the evening rush, a driver told us it took him 3 hours to go 4 miles. So this is an option, but expect to move at a crawl
I-95 DETOUR #3: This is for Georgia commuters going SB. Traffic got so bad yesterday, troopers began sending people WB on Hwy 82 to Nahunta.
Then take US-301 SB to Folkston... there you can use US-1 SB through Callahan into Jacksonville. Looooong detour, but it may move better