Skip to Primary Content

Welcome to the new version of Miami-Dade County's website. We'd love your feedback.

The Underline

The Underline is a public-private partnership between the Department of Transportation and Public Works (DTPW), the Parks, Recreation and Open Spaces (PROS) Department, and Friends of the Underline.

The Underline will transform 120 acres of Miami-Dade County owned land below the existing Metrorail guideway, from the Miami River (Brickell area) to the Dadeland South Metrorail Station, into a world-class, multimodal urban trail. Once completed, The Underline will provide a walkable and bikeable corridor that will improve connectivity between surrounding neighborhoods.

The Underline will be built in eight phases. Each segment of The Underline will demonstrate Miami-Dade County’s commitment to improving and enhancing connectivity. Construction of Phase 1 - The Brickell Backyard is scheduled to start in Spring 2019.

Once all phases are completed, this project will be Miami-Dade County’s first true mobility corridor uniting all modes of transportation enhancing accessibility to eight Metrorail stations within its path and the neighboring communities. The Underline will serve 107,000 residents within a 10-minute walk, will provide access to public transportation to one University and 24 schools, two hospitals, three urgent care facilities, four major malls and over 10,000 businesses.

The 10-mile corridor, which will vary from 70 to 170 feet wide, will provide pedestrian and bicycle paths, improvements to over 30 intersections, access to public transportation, lighting and wayfinding. In addition to the transportation components, recreational features will include butterfly gardens, playgrounds, exercise equipment, basketball and volleyball courts, soccer fields, picnic areas, dog parks and more.

Phase 1

The Brickell Backyard
This is the initial construction phase of The Underline project. This phase consists of a half mile long segment below the Metrorail guideway between the Brickell Metrorail station and the Miami River.

Major Components:

  • New dedicated pedestrian and bicycle trails
  • Improvement of three signalized intersections
  • Reconfiguration of bus bays and bus patron seating areas

Amenity Components:

  • Native vegetation landscaping
  • Way finding signage
  • New lighting
  • A gym area with a flexible basketball court, gym equipment, and space for group classes
  • A staging area reserved for concerts, movies, yoga and other group activities
  • A dining area
  • A game area with fixed tables and chairs
  • During construction

    Construction started in December 2018 and it’s scheduled to be completed by the end of June 2020 (18 months).

    The first construction step is to install a temporary construction fence.

    The construction cost for Phase 1 – The Brickell Backyard is $14 Million.

    The estimated total cost is $110 Million for the 10-mile project.

    The funding sources will vary throughout the project (full 10 miles). The funding sources for Phase 1 are: City of Miami, Road Impact Fees, General Obligation Bond (GOB), Miami-Dade County Capital Outlay Reserve Funds, Transportation Alternatives Program Funding and State Appropriations.

    The hours of construction will vary but typically will be between 7:30 a.m. and 6 p.m.

    Metrobus and trolley bays will be relocated near their current location during certain times of the project’s construction. Information and signage will be posted prior to any construction that may affect the bus or trolley bays.

    There will be times when the MPath will be closed in order to construct the new Trails; however, sidewalks adjacent to the project on the other side of the street will remain open.  Information and signage will be posted during any construction that may affect MPath. The contractor is making every effort to provide a small area designated for dogs every two blocks. Please be sure to clean up after you dog when done! Thank you.

    Sidewalks adjacent to the construction will be temporarily closed as required to build The Underline. The contractor will address detours signs and provide sidewalk closed signs redirecting pedestrians to the detours. All pedestrian signs will be installed per FDOT standards. The construction fence is typically setback to allow for entry and exiting from vehicles parked along the sidewalk. The setback is not intended for pedestrian traffic. Pedestrians will be directed to use adjacent sidewalks on the other side of the street. The contractor will make every effort to minimize impact to residents and businesses during construction.

    The Metrorail and Metromover stations will remain open and access will be provided.  We will provide signage indicating changes to the entrances, if required.

    Some ground contamination was found and will be remediated during construction. The land under the Metrorail Guideway is owned by Miami-Dade County.

    For project information, please visit the Friends of the Underline webpage or the project’s webpage. Please contact Karla Damian at 786-469-5420 or for any issues regarding the construction of The Underline.
  • After construction

    The Underline Management Organization 501C3 will manage and maintain The Underline after construction is completed.

    The half-mile Brickell Backyard, Phase 1, will feature several amenities such as  landscaping with native vegetation, a community soundstage, a dining area, a game area with fixed tables and chairs, an outdoor gym with a flex basketball court, a dog friendly area, way finding signage, lighting, cultural and educational programs, butterfly gardens, a café, bike parking and crosswalks. These features will be accessible to bus, trolley, Metromover and Metrorail patrons, as well as visitors and residents.

    The first phase of The Underline will have a dog friendly area.  Dogs will be required to be on leashes. Dog parks are being planned along several segments of The Underline.  Dog parks will vary in size based on available area.

    Security for The Underline will be provided by the Management Organization.  

    The Underline Management Organization is envisioning cultural and educational programs and events for this section of The Underline.   

    All crossings will be improved. This is a vital component of the project in order to improve safety for pedestrians and bicyclists. There will be three intersections that will receive new traffic signals with pedestrian lead intervals in order to enhance street crossings.  In addition, the new markings for the crossings will be enhanced with The Underline’s design elements.

    For additional project information, please visit the Friends of the Underline webpage or the project’s webpage.


This is the image description.
This is the image description.
This is the image description.

About Us

We connect people to places by providing a high-quality, safe, reliable, clean, and efficient mass transit system that meets the travel needs of the County's growing population and we provide vital transportation infrastructure systems and services.

Our mass transit system includes:

We provide all traffic signals countywide, along with all traffic control signs, street signage and pavement markings and all County and State-owned street lights. We build, operate and maintain movable and fixed bridges, swales, roadway surface repairs, guardrails, and along County road rights-of-way. We also operate and maintain the Rickenbacker and Venetian Causeways.

We manage the County Stormwater Utility for flood and water quality protection and maintain the secondary canal system.

Permits for all work within rights-of-way and code enforcement of unpermitted work is also handled by our Public Works division.

You are now leaving the official website of Miami-Dade County government. Please be aware that when you exit this site, you are no longer protected by our privacy or security policies. Miami-Dade County is not responsible for the content provided on linked sites. The provision of links to these external sites does not constitute an endorsement.

Please click 'OK' to be sent to the new site, or Click 'Cancel' to go back.