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S.R. 5/U.S. 1/Overseas Highway from MM 31.4 to MM 31.5
455624-1-52-01

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About

The Florida Department of Transportation (FDOT) began a construction project on November 12, 2025, along State Road (S.R.) 5/U.S. 1/Overseas Highway from MM 31.4 to MM 31.5 on Big Pine Key in Monroe County.

FDOT is committed to ensuring the state’s infrastructure serves residents, businesses, and visitors, to meet their needs now and in the future. Key areas include safety, resiliency, supply chain, technology, and workforce development. The following benefits are included in this project:

CommunitiesCOMMUNITIES

  • Improving the roadway to help preserve the endangered Key Deer population

ResiliencyRESILIENCY

  • Reconstructing the Key Deer Grate structure for long-term durability and performance to protect both drivers and wildlife

SafetySAFETY

  • Reducing wildlife on the roadway helps prevent collisions

Workforce DevelopmentWORKFORCE DEVELOPMENT

  • This project creates opportunities for contractors, which results in positive economic benefits for the workers and the community

 

LANE CLOSURE INFORMATION

Work will be done in phases to reduce the effects of construction on the community.

Lanes can be closed during the following non-peak hours:

  • 8 p.m. to 6 a.m., Sunday night through Thursday night

Traffic will be temporarily shifted onto the existing shoulders, which will serve as travel lanes.

The speed limit throughout the area has been restored to the posted 45 mph during the day and 35 mph at night.

The construction schedule may change due to weather or other unforeseen circumstances.