Freeway caps aren't a new concept. Numerous freeway caps have been implemented across the United States and are widely embraced by the communities where they are implemented. Below are just a few great examples of where it has been done:

Aubrey Davis Park: Mercer Island, WA

Aubrey Davis Park was formed on top of a freeway lid over I-90. The park was created to minimize impacts of the freeway on nearby residents from I-90. It opened to the public as a park in 1990. It was renamed in honor of their former mayor Aubrey Davis, who lobbied for the park's creation in the 1970s, after her passing.

Union Station: I-670 Cap in Columbus, OH

The construction of I-670 in Columbus in 1965 split neighborhoods from downtown. In 1996, a revitalization project that initially planned to expand the highway, turned into a plan to cap the highway into a vibrant streetscape with shops and restaurants, bridging the urban divide.

Freeway Park: I-5 Cap in Seattle, WA

Freeway Park, opened in 1976 in Seattle over Interstate 5, is the first U.S. park built on a freeway. Spanning 5.2 acres, it's downtown Seattle's largest public park, funded by Forward Thrust bonds and designed for public enjoyment. The park features a unique blend of concrete structures, green spaces, and amenities, including a 30-foot concrete canyon and the pre-existing Naramore Fountain, all connected by a series of plazas.