While the High Line sparked an international conversation about how to reuse elevated transportation infrastructure in our cities, planners and designers have become increasingly focused on what lies beneath these elevated highways, subway tracks, and rail lines. Across the U.S., cities are rethinking these residual spaces, which have long been underused and neglected. The Underline in Miami, Florida is one such project that seeks to transform the area beneath one of the city’s major elevated transportation systems: the MetroRail. Following a national design competition, James Corner Field Operations, the same firm that designed the High Line, was selected to transform the underused space into “the green spine for a future 250-mile-long network of bicycle and walking trails.”
Beating out 19 other firms in a competition held by Friends of the Underline, Field Operation’s design for the first segment of the Underline, which will be 10 miles long, will be the first transportation corridor in Miami-Dade County to integrate all modes of traffic. According to Friends of the Underline, “the Underline will connect to downtown and the Miami River Greenway on the north and to the proposed Ludlam Trail and the existing South Dade Trail on the south.”
In a public meeting on June 25, Corner identified four “character” zones that will be designed along the length of The Underline. “In the Brickell area, residents were focused on nature and play; in the Grove area, residents were interested in arts and crafts and cultural incubators; around the University of Miami, there was a focus on green tech and sustainability initiatives; and around South Miami and Dadeland, residents favored active recreation and health and fitness.”
Each of these zones will have specific “places” related to the interests of each group of residents. For example, underserved communities in Dadeland that don’t have access to parks for active recreation will get playing fields, playgrounds, and exercise areas within their zone of the Underline.
The Underline will also connect these different communities by making improvements that will attract them to the MPath, an off-road shared path for bikers and pedestrians that currently runs beneath the rail line. According to Isabel Castilla, a project manager at Field Operations, the new design plan calls for two adjacent paths: one dedicated for cycling and one for running and walking.
The plan aims to increase pedestrian and bicyclist safety along the MPath as well. According to Friends of the Underline, one of the biggest concerns when pursuing the project was user safety. “Currently the MPath, the bike path underneath MetroRail, has limited lighting or amenities, and needs wider and safer crosswalks. All of these, and other safety issues, are being addressed,” their website says.
Throughout the space, which will create more that one hundred acres of open space and restored natural habitats, existing vegetation will be used where possible. Elsewhere, Field Operations plans to use historically-occurring plants that will decrease the need for maintenance and minimize water usage, as the firm did on the High Line. “We envision a lot of native plantings that will only grow in a robust way and will bring other species with them, like birds and butterflies,” James Corner said in a video interview. These plantings will be divided into different ecosystems found throughout South Florida, such as pine rocklands, hardwood hammocks, and wet prairies.
Corner also discussed other proposed design elements which focus on creating an experience that is “consistent, and unified and wholesome.” For example, Field Operations may decide to use “the distinctive graphic ‘U’ in The Underline logo … in the design of seating, trash receptacles, bike parking, etc.”
As part of a commitment to provide “a 10-mile canvas for artistic expression,” Friends of the Underline plans to allow public art on the existing MetroRail infrastructure. The project recently received a $200,000 grant from ArtPlace America’s 2015 national grant program, which will go toward public art installations created by recognized national and Miami-based artists. “The artwork along The Underline will reflect the unique characteristics of the major neighborhoods along the corridor,” said Meg Daly, founder of Friends of The Underline.
The masterplan for the project will be completed later this month. After approvals from various agencies, construction will begin on the two demonstration projects, first at Brickell in the fall of 2016 and then at University in 2017.