A major connection between mainland Florida and the Florida Keys, the current edition of Card Sound Bridge is a high-rise toll causeway connecting southern Miami-Dade County and northern Monroe County. It is one of only two ways that motorists can leave or enter the Florida Keys (the other is U.S. Route 1). Toll for two-axle automobiles is USD $1.00 (USD $.50 for each additional axle), and SunPass will not work at this toll. The toll fee is waived upon evacuating the Keys for hurricanes or in instances in which US 1 is impassable.