thelakelander - thanks for posting the photo, much more efficient than my link followed by more clicks ...
pierre - the new Diverging Diamond design for the interchange is supposed to allow the interchange to handle traffic more efficiently. Eastbound traffic on JTB could exit onto San Pablo, then immediately turn left onto the westbound entrance ramp, which leads to the new Mayo entrance.
From the FDOT website about the new interchange design:
This project involves reconstructing the Butler Boulevard/San Pablo Road interchange as a diverging
diamond interchange (DDI). Through its unique design, a diverging diamond interchange enhances
mobility and improves safety by eliminating conflict points for motorists seeking to turn left. In a DDI,
drivers cross over to travel briefly on the left side of the road and then seamlessly return to the right
side of the road on the other side of the intersection. Additionally, the DDI promotes efficiency with
only two clearance intervals (the time for traffic signals to change from green to yellow to red) instead
of the six or more found in other interchange designs.