No signals between Flomaton, Alabama, where the Florida Panhandle line leaves the Mobile to Montgomery main, to just short of Tallahassee. Never has been any. In days of the L&N-SAL Gulf Wind, the speed limit on this portion was 55 mph, not 59. There is also the additional length over the highway distance of about 40 miles between Mobile and Pensacola, as the railroad comes into Pensacola from the north, not the west.
New Orleans to Jacksonville elapsed times in the schedule were close to the best ever for this line. I think before the train died, it had been slowed down from this schedule.
Pre CSX conglomeration, this line was fairly lightly trafficed. I think in the 70's no more than one or two freights a day between Flomaton and Tallahassee.
There is now enough traffic on this line to justify signals. In fact, I think that there are CTC "islands" at some of the long sidings. There is also now so much traffic on the line along the Gulf between New Orleans and Mobile, and on east that sections of second main would seem to be a good idea.
For more information than you probably want, go to www.southernhsr.org In particular, there is a 2005 run along the coast that describes every bridge and siding between Mobile and New Orleans.
www.southernhsr.org/PDFs/HighSpdRailInspTrip05.pdf