This is a quick survey of sorts in three parts. The first two parts covered built projects. This last part contains two unrealized projects, one a student thesis project and the other a masterplan for a major urban revitalization program.
Published in 306090 07: Landscape within Architecture (2004) is Hans Herrmann's Public Domain and the Dispersed City, his thesis project at Clemson University. Sited at the intersection of Interstate 85 and Interstate 285, also known as the topologically knotty Moreland Interchange, in Atlanta, Georgia, this project aimed “to provide new forms of access to the space of the interchange through the introduction and incorporation of an urban park. As a device, the park is designed to bring focus and articulation to the roadway’s existing status as a public monument.”
Because this issue of 306090 is out of print and used ones are rather expensive, we'll quote a good chunk of the article, specifically the part about “organizational tactics”:
The park is arranged according to three structuring systems. One system is made up of a network of paths and event pads or surfaces that define activity zones both on and above the ground plane. The paths link event pads located throughout the park, while also carrying services that may be used to delineate individual event spaces. Power, water, and other utilities are supplemented by secondary sets of inlays (e.g., information-conveying conduits such as telephone lines, DSL, satellite feeds) that are accessed through the paths and pads. The pads and surfaces are paved, inlaid, or sometimes planted. To promote varying forms of occupation, the pads feature points of connection to the utilities supplied through the adjoining paths.
Throughout the course of a year, the paths and pads are opened and closed by a second structuring system: a carefully maintained program of plantings. The continual redefinition of space by shifting vegetation ensures a constant revitalization of the park as new venues and points of interest become available and familiar ones are closed off. In doing so, the park becomes a barometer of sorts through which the seasonal events and traditions of the city may be observed.
Given that the space of the interchange is largely conditioned by the daily cycle of traffic, time becomes the third structuring system. As conceived, the park has two temporal modes. The first is a twenty-four-hour park, comprised of the indeterminate spaces and events supported by the paths and pads, as well as the everyday points of operation such as service stations and welcome centers. The second mode is a carefully defined and choreographed set of events and venues that operate on a pre-determined timetable. That schedule is governed by a calendar of events decided upon by the city and its parks and recreation council. Those systems will function simultaneously to allow for overlaps of use and occurrence to take place while within the space of the interchange and the city at large.
As a civic construct, the proposed park supplements the interchange by supplying it with new opportunities for access. Functioning in many different ways to serve the public, the park and interchange attempt to bring dialogue to, and between, the occupants of both spaces, while fostering a dynamic layering of activities and interactions.
The East River Waterfront Esplanade and Piers is a planned series of public spaces below and in the vicinity of F.D.R. Drive, an elevated highway on the eastern edge of Lower Manhattan.
The masterplan was developed by multidisciplinary teams that included Ken Smith Landscape Architect, SHoP Architects, several engineering firms and the planning and transportation departments of New York City. You can download it from here.
Now it's your turn to let us know in the comments (or on twitter — @pruned) what similar “reclaimed” spaces below still functioning highways, bridges and rail lines that we have missed.