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Project Profile: I-395/SR 83611/I-95 Interchange Project

I-395/SR 83611/I-95 Interchange Project

photo credit: FDOT/AW-dMG

Location

Miami, Florida

Project Sponsor / Borrower

Florida Department of Transportation (FDOT)

Miami-Dade Expressway Authority (MDX)

Program Areas

Alternative Project DeliveryTolling and Pricing

Mode

Highway/Toll Highway/Bridge

Description

The I-395/SR 83611/I-95 project consists of three reconstruction projects at the interchange of I-395, SR 836, and I-95 (Midtown Interchange) in downtown Miami. The project will reduce congestion by adding capacity, improve safety by alleviating existing operational and geometric deficiencies and eliminating left-hand entrance/exit ramps, improve local access to and from I-395, and reduce evacuation time from Miami Beach. Along I-395 from the Midtown Interchange to the MacArthur Causeway (1.4 miles), the project will completely reconstruct the existing structure and create a signature bridge that will span 1,025 feet over NE 2 Avenue and SR 5/Biscayne Boulevard. The project will add additional capacity to I-395 with a total of three through lanes in each direction and provide separate connector ramps for traffic to and from I-95. The existing I-395 eastbound off-ramps at NE 2 Avenue will be moved west to North Miami Avenue, and the westbound on-ramps at NE 1 Avenue will be shifted to the west to North Miami Avenue. NW 2 Avenue will also be reconnected under I-395 providing residents greater access. The area under I-395 and the new bridge will be transformed into 55 acres of open communal space in the Overtown neighborhood known as the Heritage Trail.

Improvements to SR 836 extend 1.4 miles west from the Midtown Interchange to NW 17 Avenue and include the construction of a four-lane viaduct that begins just east of the toll gantry at NW 17 Avenue, rising eastward over the center of SR 836 and allowing drivers to bypass the Midtown Interchange, touching down at I-395 east of I-95. The existing SR 836 roadway and bridges will serve as a collector distributor system to allow drivers to enter and exit from existing local roads and I-95, reducing weaving movements and improving safety and traffic operations. The existing eastbound SR 836 ramp to northbound I-95 will be widened to include an additional lane. The project will also construct a new elevated ramp from southbound I-95 to westbound SR 836 with an additional exit at NW North River Drive.

Along I-95, improvements include the total replacement of both the northbound and southbound travel lanes between NW 8 Street and NW 29 Street (1.6 miles) and the addition of a seventh lane in the northbound direction to receive the additional lane from eastbound SR 836 ramp to northbound I-95 and enhance the flow of traffic through the Midtown Interchange.

FDOT has partnered with MDX to combine these projects into a single design-build-finance project.

Cost

$802 million (design-build cost)

  • I-395 Reconstruction (FDOT) - $556 million
  • SR 836 Improvements (MDX) - $186 million
  • SR 836 Westbound Connector (FDOT) - $35 million
  • I-95 Pavement Reconstruction (FDOT) - $25 million

 

Funding Sources

State funds (state motor fuels tax, vehicle license fee, documentary stamp collections, etc.) - $626 million

MDX funds (toll revenue bond proceeds) - $186 million

Project Delivery / Contract Method

Design-build-finance

Private Partner

Archer Western-de Moya (AW-dMG) - Design-Build Joint Venture

  • Archer Western Contractors
  • The de Moya Group
Project Advisors / Consultants

HDR - Overall design project management, I-395 and signature bridge design

RS&H - SR 836 improvements design

GOAL Associates - I-95 improvements design

Pevida Highway Designers - Design-build coordination and maintenance of traffic design

Metric Engineering - Surface street and traffic signal design, public involvement, NEPA commitment compliance

Lenders

None

Duration / Status

Design-build team selection was announced in May 2017.

Construction is scheduled to begin in December 2017.

Construction completion is estimated by in late 2022.

Financial Status

The Contractor will be paid on a pre-set Cash Availability Schedule. The payment schedule was fixed and made known to all bidders during the procurement process. FDOT reviewed bidders' financial proposals to confirm their capacity to cover any funding gaps during construction with private equity or financing. A letter of commitment was submitted by the selected bidder.

Innovations
  • The cable-stayed signature bridge with six arches springing from one central arch thrust block features a 100-year design life for the main span unit and an integrated Structural Health Monitor System that continuously monitors stay forces.
  • When originally constructed in the late 1960s, I-95 and I-395 divided the Overtown neighborhood below. The project will reconnect communities and provide open space within the redeveloped 55-acre Heritage Trail. The site will feature high vertical clearances improving daylight access and comprehensive bicycle and pedestrian connectivity.
Related Links / Articles

Project Website

Contacts

Maria I. Perdomo, P.E.
FDOT Design Project Manager
Tel: (305) 640-7186
maria.perdomo@dot.state.fl.us

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