State Roads in the Florida Keys

Since the opening of the Overseas Highway in 1938, the set of Florida State Roads, USA, serving the Florida Keys has been a small one. Currently only two such roads designated by Florida Department of Transportation are located on the string of islands in Monroe County, Florida, and only eight other State Roads have been designated, but have since been reverted to Monroe County maintenance (at least two of the former State Roads still have the old SR signs on the edge of their shoulders and it is likely that one of them was never signed).

Current State Roads in the Florida Keys

State Road A1A: South Roosevelt Boulevard from Bertha Street to the Overseas Highway (US 1) in Key West is the southernmost of seven discontiguous segments of SR A1A in Florida (in fact, it is the southernmost state-designated highway of the contiguous United States). This section of SR A1A is signed only near Key West International Airport and Fort East Martello Museum and Gardens.

State Road 5 is the "hidden" (unsigned) FDOT designation for not only the Overseas Highway, but virtually all of US 1 south of Jacksonville since 1945. Along with Card Sound Road, the Overseas Highway is one of only two roads that enter and exit Monroe County and the Florida Keys. From 1938 to 1945, US 1 carried the designation State Road 4A.

Former State Roads in the Florida Keys

State Road 5A (now Monroe County Road 5A): Flagler Street from First Street to South Roosevelt Boulevard (SR A1A) in Key West. ...
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