For decades, Vienna has required a 6′ masonry wall to separate commercial property from residential neighborhoods. This page explains what that wall does — reduce the noise from the parking lot. It also explains what it doesn’t do (or, really, what it isn’t needed to do) — reduce the noise from Maple Avenue.
This analysis ends with what I hope is an obvious conclusion. Where MAC development replaces parking lots with (two-story) garages adjacent to residential areas, the old 6′ masonry wall doesn’t cut it any more. Vienna needs to change the building code to require that those MAC garages be enclosed, not open-sided, when they are adjacent to residential areas. Otherwise, MAC strips away a decades-old noise protection that the Town has offered to its residential neighborhoods. Continue reading Sound walls and parking garages, 3/17/2019