As Americans’ concept of what cities are for and how they should be used shifts, so too does their urban design. Atlanta’s BeltLine, Philadelphia’s Rail Park, and Chicago’s Bloomingdale Trail showcase how unused railways and forgotten infrastructure are being given a new life in the form of converted trails, parks and promenades. The movement, popularly known as landscape urbanism, stems from the model of design of Frederick Law Olmsted, Central Park’s prominent architect. Marcus Hiles notes that “capping,” where green spaces are built over freeways, has become a trademark practice spurring from this trend, converting expansive expressways into popular links between communities. In 2012, Dallas capped the Woodall Rodgers Freeway with Klyde Warren Park, connecting the Uptown and Downtown neighborhoods and allowing previously impossible pedestrian access across the majority of the city.