Four of the six soaring arches of the I-395 Signature Bridge over Downtown Miami have been closed as of September 8, 2026, marking a visible milestone in the Florida Department of Transportation's (FDOT) $866 million reconstruction of one of South Florida's most traveled corridors.

How far along is the I-395 Signature Bridge construction?

FDOT crews have successfully closed Arches 1, 2, 4, and 5 of the 1,025-foot signature span, while work continues on the two remaining arches. The concurrent pace of activity signals that the project, which carries Interstate 395 between Downtown Miami and Miami Beach, is moving through a critical structural phase.

  • Arches 1, 2, 4, and 5 are fully closed as of September 8, 2026.
  • Work on the two remaining arches is ongoing.
  • The main span stretches 1,025 feet across the MacArthur Causeway corridor.

What other construction work is happening on the project right now?

Beyond the arch closures, FDOT crews are advancing on multiple fronts of the $866 million reconstruction simultaneously. The westbound bridge superstructure is actively under construction, with falsework being erected, reinforcing steel being placed, and concrete pours under way.

  • Falsework, reinforcing steel installation, and concrete pours are all progressing on the westbound superstructure.
  • A new pedestrian bridge spanning the Florida East Coast Railway (FEC Railway) tracks is also under construction as part of the project.
  • The pedestrian crossing will improve non-motorized connectivity in the Downtown Miami area.

How can Miami residents learn more or weigh in on the Signature Bridge project?

FDOT is hosting a public pop-up event on September 16, 2026 in Miami to give community members a direct opportunity to ask questions and learn about the status of the ongoing reconstruction. The format is designed to be accessible, allowing residents to engage with project representatives informally rather than at a formal public hearing.

Why does the I-395 Signature Bridge matter for Downtown Miami?

The I-395 reconstruction represents one of the largest single highway investments in Miami-Dade County history, replacing an aging elevated expressway with a signature-span design intended to reconnect neighborhoods and improve the urban streetscape beneath the roadway. At $866 million, the project is expected to transform the experience of both drivers and pedestrians traveling between Downtown Miami and Miami Beach.

  • The project replaces a mid-20th-century elevated highway structure.
  • The new design aims to activate street-level space beneath the bridge.
  • Improved pedestrian infrastructure, including the new FEC Railway crossing, is a core component.

Original reporting by Florida YIMBY.