Florida is the one state where mile markers double as street addresses. Here's how the numbering works on I-95, I-75, and the Turnpike, why the Keys run entirely on mile markers, and how to see your exact one plus live FDOT conditions in real time.

How Florida numbers its highways

Florida's mile markers count up from the south or the west. I-95 starts at mile 0 in Miami and climbs about 382 miles to the Georgia line; I-75 does the same from the south. One catch: Florida's Turnpike is a separate toll system with its own mile marker numbering, so a Turnpike mile and an I-95 mile are two different scales even where the roads run near each other. Mile marker data for Florida's highways is bundled into MileCheck and works offline.

The corridors people actually drive

  • I-95 runs the Atlantic coast — Miami, Fort Lauderdale, West Palm, Daytona, Jacksonville.
  • I-75 comes up the Gulf side through Naples, Tampa's orbit, and Gainesville, crossing the Everglades on Alligator Alley.
  • I-4 links Tampa and Daytona through Orlando.
  • Florida's Turnpike cuts the diagonal from Miami toward Orlando on its own mile numbering.

The Keys: where addresses are mile markers

The Overseas Highway — US-1 through the Florida Keys — is the most famous mile-marker road in America. Addresses in the Keys literally are mile markers: a restaurant is "at MM 81.5," a dive shop is "MM 48, bayside." The numbering starts at MM 0 in Key West and runs about 113 miles to the mainland, with the Seven Mile Bridge in the 40s. If you drive the Keys, you're navigating by mile marker whether you meant to or not.

MM 0 MM 50 MM 100 MM 113 · mainland Key West Marathon Key Largo Seven Mile Bridge · MM 47
US-1, the Overseas Highway: MM 0 in Key West to about MM 113 at the mainland, with the Seven Mile Bridge spanning the mid-40s.

Hurricane season runs on mile markers too

When a storm approaches, Florida's evacuation orders, contraflow plans, and road-status updates are all given by route and mile — "US-1 closed at MM 90," "shoulders open on I-4 from mile 58." In the Keys especially, where there's exactly one road out, knowing your mile marker isn't trivia, it's the language the whole evacuation runs on. It matters year-round too: afternoon downpours, fog on Alligator Alley, and drawbridges that stop traffic on the coastal routes.

Live FDOT alerts, in one place

MileCheck pulls live road alerts straight from FDOT — closures, crashes, and construction — tied to the mile marker and direction so you can see what's ahead of you on your route. Florida's coastal drawbridges have live status pages too, so a raised span doesn't have to be a surprise.

Everyday and emergency

Whether you're meeting friends "at MM 81.5" in Islamorada, reporting a breakdown on I-95, or watching a storm track in September, the mile marker is the location Florida's roads run on. MileCheck shows yours in real time, down to a tenth of a mile, even where the cell signal drops.

Keep reading

Nearby state guides: Alabama  ·  Georgia

Florida drawbridges: every movable bridge, its opening rules and live status →

Essentials: What to tell 911 on the highway  ·  How to find your mile marker  ·  Browse the live mile marker map  ·  All 50 states