The Brief DDOT begins two-year plaza project at DuPont Circle. Big changes are underway at DuPont Circle as the District Department of Transportation begins a two-year transformation of part of Connecticut Avenue into a public plaza. Deckover project beginsThe Deckover project will build a plaza over the Connecticut Avenue underpass between Q Street NW and DuPont Circle, creating a new space for dining, relaxing, walking, and community events. To complete the project safely, service lanes on Connecticut Avenue between Q Street and DuPont Circle will be closed in both directions for the duration of construction. Deckover construction begins on Connecticut Avenue in Dupont CircleDetours for vehicles include:• Northbound traffic routed via New Hampshire Avenue or 19th Street to Q.