Does your trip to South Florida include a rental car?
In particular if you're visiting the Miami or the Fort Lauderdale area of Broward County, you'll want to add one as an optional upgrade to your rental or maybe even buy your own pass at a local CVS or Walgreen's drugstore.
You can drive most tolls without the pass, but you might face added delays in stopping to pay the toll itself or added costs where toll-by-plate is compounded by your rental company.
Keep life convenient during your time away, add a SunPass!