Freeway Park in Seattle was officially listed on the National Register of Historic Places on December 19, 2019 [西雅圖的公路公園（Freeway Park）2019年12月19日正式被聯邦列入國家史蹟名錄（National Register of Historic Places）中]

The Cultural Landscape Foundation issued a congratulatory statement that the highway park was recognized by the National Register of Historic Places.

Charles Birnbaum, President and CEO of the Cultural Landscape Foundation, said: "We are pleased to see that Haplin's revolutionary design has been recognized by the National Register of Historic Places. As a pioneer of urban planning architecture, Highway Park is With a restoration project, we look forward to this Seattle Community Park being elevated to a National Historic Landmark. "