I'm not sure about I-75 from the Naples area northward, but from Ft. Lauderdale westward into Naples it is a toll road. I think every highway/expressway/state road/interstate etc is a toll road in Florida. Almost none have cash toll booths anymore...they've converted to electronic tolling. You either need a preloaded Sun Pass (which is registered to your tag) or you are charged "toll by plate," where a photo is snapped of your tag/back of your vehicle each time you pass through a tolling location and then a bill is mailed to the registered vehicle owner (which includes said photos). Either way, the Florida Department of Transportation has a record of the date, time, and location of every toll charged to every vehicle on our toll roads.
I didn't see anything in this discovery batch, but has any evidence of toll activity been mentioned elsewhere? Just a thought I had while reading about CWW possibly removing the front tag (which is insignificant for tolling purposes, at least in Florida, because we don't have front license plates).