I think RE is pretty much spot on with his assessment.
The light eyebars hanging down for the first set of verticals suggest a pin-connected truss is what we have here. I would say that ca.1900 is indeed a good guess and that this span likely isn't older than 1915 at the latest.
Not many truss bridges in the Sunshine State, so this is a nice find!
I would say it looks like a bridge that would have been built for automobiles, probably around the year 1900.
Does anyone know the date of construction for this bridge? Was it a rail bridge?