Nighttime Lane Closures on U.S. 1 in Key Largo Feb. 22-26, 2026

Florida Department of Transportation District 6 posted nighttime lane closures on SR-5 / U.S. 1 / Overseas Highway in Key Largo that ran from Mile Marker 108.4 to Mile Marker 112.8 and were scheduled for the week of Feb. 22–26, 2026. The district’s project page identified the closures as part of the SR-5 / U.S. 1 roadway project covering that 4.4-mile corridor.

The District 6 posting described the traffic controls as nighttime lane closures and related traffic controls affecting east-west traffic along U.S. 1 through Key Largo, with the schedule covering multiple nights during the Feb. 22–26 work window. The advisory named the SR-5 / U.S. 1 / Overseas Highway roadway project, linking the closures to ongoing project activity between the two mile markers.

Motorists traveling between MM 108.4 and MM 112.8 on U.S. 1 should have encountered alternating lane closures and traffic controls during the scheduled nights, according to the District 6 notice. Because the closure area spans 4.4 miles of Key Largo roadway, drivers moving through the corridor from the Tavernier vicinity northward toward northern Key Largo needed to plan for intermittent stops and reduced travel speed while the controls were in place.

For immediate, authoritative updates the posting pointed readers to the Florida Department of Transportation District 6 project page for the SR-5 / U.S. 1 / Overseas Highway roadway project, where officials listed the Feb. 22 start and the nightly control schedule through Feb. 26. Travelers who use U.S. 1 for commuting, school runs, or deliveries in Monroe County were advised to check that project page before nighttime trips to confirm whether controls were active.

The closures were contained to nighttime hours as listed on the District 6 project page and were part of the district’s scheduled work for the SR-5 / U.S. 1 corridor between MM 108.4 and MM 112.8. FDOT District 6 remains the primary source for any post-closure updates or changes to the schedule for Key Largo motorists and local agencies coordinating traffic management.