the state. (The graphic above shows SR 30 change to SR 20 going east of the panhandle.) Minor routes assigned three or four-digit numbers are located relative to the east-west control roads on the basis of the first digit. For example, State Road 464 is located between State Road 40 and State Road 50. Every section of U.S. Highway and Interstate Highway has a State Road number assigned to it, usually unsigned (for example, Interstate 4 is also unsigned SR 400). In addition to some named toll roads (for example, 91 and 821, which make up Florida's Turnpike) some minor State Roads are also unsigned (like SR 913 and SR 5054). See also 1945 Florida State Road renumbering State roads in Florida before 1945 List of former state roads in Florida List of state roads in Florida List of toll roads in Florida References External links Florida Department of Transportation US Department of Transportation: Active FHWA Toll Facility Agreements Florida Highway Patrol State Road Listings by Troop State Roads