The FRA (Federal Railroad Administration) has released a video of a simulation of the AAF/FEC rail traffic at the Jupiter Inlet - Loxahatchee River rail bridge and how much it would impact marine navigation during a typical traffic period. (for Marine, peak would be a weekend)
For reference:
Orange - Passenger
Green = Intermodal
Blue = UPS
Grey = Rock/Aggregate
Pink = Local
It's an 8 minute video, but the key item in the simulation is the average boat wait time. The largest boat backlog occurs late on Sunday afternoon when boaters are returning to their marina and AAF runs 2 trains and FEC has 1 freight.
50% of all boats that pass the bridge will experience a wait. The ones that do wait, the average wait time is 7 minutes. So it is possible that someone will spend 15 minutes of total wait time (coming and going) waiting on the bridge to cycle.
It's not a sexy video, but clearly shows what boaters might face during an AAF service window.
https://www.youtube.com/v/M1elgw0uE1I
Pretty cool.