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Miami’s new $840 million Signature Bridge and highway project continues construction, with completion expected in late 2027
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·3 min read

In Miami, the large-scale $840 million I-395/SR 836/I-95 Design-Build Project is underway, set to be finalized in late 2027. The centerpiece of this project is the striking bridge adorned with six arches, stretching 1,025 feet across I-395.

The Florida Department of Transportation (FDOT) and the Greater Miami Expressway Agency (GMX) are partnering on this major infrastructure project to improve traffic flow, safety, and access in Miami-Dade County. These highways converge at a key interchange that handles over 450,000 vehicle trips daily, serving as vital access points to communities, ports, tourist destinations, and more.

To enhance the overall traffic flow, additional lanes are being added to I-95 and SR 836. These expansions are projected to reduce travel times by up to 20% during peak hours. Furthermore, the redesigned roadways will incorporate various safety features, including wider shoulders, better signage, and cutting-edge crash prevention technologies, all contributing to a safer and more efficient driving experience. This project also includes the construction of a new upper deck over the Dolphin Expressway (SR 836). This structure is designed to streamline the flow between SR 836 and Interstate 95.

Another unique feature of this project is the planned 33-acre urban park beneath I-395, known as The Underdeck. This green space, part of the project's environmental focus, will include recycled materials and energy-efficient construction methods. The Underdeck is envisioned as an urban oasis, contributing to environmental sustainability by reducing the urban heat island effect.

Project Highlights:

  • Improved Traffic Flow: The project will add capacity and reconfigure lanes to reduce congestion and weaving, particularly at the busy interchange and around the Health District.

  • Enhanced Safety: Dedicated lanes for local and through traffic will be implemented on I-395, and pedestrian safety will be improved with new sidewalks, crosswalks, and a bridge over the FEC tracks.

  • Community Connections: A signature six-arched bridge will span Biscayne Boulevard, creating a new Miami landmark and enhancing the pedestrian experience with a continuous trail and public spaces beneath the bridge.

Specific Improvements:

  • SR 836: Double-decked section for direct connection to MacArthur Causeway or I-95 South; reconfiguration between NW 12th Ave and I-95 to eliminate weaving and improve access.

  • I-95 Interchange: Widening of eastbound SR 836 ramp to I-95 northbound; extension of auxiliary lane on northbound I-95.

  • I-95: Replacement and repairs of concrete pavement between NW 8th St and NW 29th St.

  • I-395: Complete reconstruction with dedicated lanes for local and through traffic; connection to Miami Beach and SR 836 west of NW 17th Ave; collector-distributor system for local traffic.

  • Bridges: I-395 bridges built at higher elevations with fewer columns to allow for community spaces underneath, including a trail and pedestrian bridge.


The I-395/SR 836/I-95 Design-Build Project is expected to:

  • Reduce traffic congestion and improve travel times

  • Enhance safety for drivers, pedestrians, and cyclists

  • Connect communities and improve access to key destinations

  • Create a new Miami landmark with the signature bridge and public spaces

  • Boost economic development by improving transportation infrastructure