I'm a bit behind the curve on this, but there's an effort from up in Central Florida to allow limited-access highways to be opened to bicyclists. We're banned by state law at present. Here's more:
A proposed statutory change would allow the Florida Department of Transportation, expressway authorities or bridge authorities to permit bicycling or walking along the shoulders of limited access highways, now outlawed under Florida statutes.There's lots more detail in Florida Today.
Limited access highways are roads where access from adjacent properties is limited in some way.
The law change [wouldn't] mean these roads will be immediately available for bike traffic, officials said. It just puts the decision to allow bike riders on parts of certain roads -- mainly bridges -- into the hands of engineers and local planners, not state lawmakers.
A similar proposal is being looked at in the Tampa Bay Area, as reported in the St. Petersburg Times.