There are several parallels between San Francisco’s Embarcadero waterfront, and Seattle’s Alaskan Way Viaduct. The Embarcadero had an ugly double-decker freeway (built in the 1960s) that was finally undone and demolished in 1991, following the 1989 Loma Prieta earthquake.
Seattle’s Alaskan Way Viaduct has been a long-time eye-sore as well; and damaged in the 2001 Nisqually earthquake. It’s demolition will finally be under way in the next 18 months or so, with the completion of a replacement tunnel.