Islamorada Crash Blocks Northbound Overseas Highway at Mile Marker 87

A vehicle crash involving injuries brought northbound traffic on the Overseas Highway to a full stop near mile marker 87 in Islamorada on Tuesday, generating multiple traffic alerts and forcing drivers to halt along one of Monroe County's only arterial routes out of the Keys.

The incident was reported at approximately 9:47 a.m. Authorities issued a full roadblock for northbound U.S. 1 at the mile marker 87 corridor, a stretch of the Overseas Highway that runs through the heart of Islamorada near Founder's Park. The blockage was not a lane restriction but a complete closure of the northbound lanes, leaving drivers on the only land route connecting the Upper Keys to the mainland with no viable alternative.

Multiple traffic alerts went out as the closure took hold during the mid-morning commute window. By late morning, the scene had been cleared and northbound lanes reopened.

The nature and number of vehicles involved were not detailed in initial reports, nor was the condition of those injured. Florida Highway Patrol, which handles crash investigations on state roads in Monroe County, had jurisdiction over the scene.

Mile marker 87 sits within the Village of Islamorada, a municipality that spans five islands and sees significant through-traffic from residents commuting toward Florida City and Miami. Any full northbound closure at that location forces vehicles to wait in place, as there are no parallel roads or detour options along that section of the Keys.