7 mile bridge (WorldofArun) Tags: ocean bridge island design nikon highway december unitedstates florida marathon clearance atlanticocean span floridakeys eastcoast us1 sevenmilebridge gulfcoast monroecounty sunshinestate overseashighway 2011 18200mm americasbyways usroute1 lowerkeys ushighway littleduckkey middlekeys d40x worldofarun knightskey floridascenichighway arunyenumula longestbridges northsouth precastsegmentedboxgirderbridge