 Traffic is slow from Round Boulevard to the Bay Bridge, lacking two-way traffic. Downtown up to Logan Circle, out through the West End, along K Street, very congested on parts of the grid, especially surrounding the NATO Convention Center closures, which remain in place around Mount Vernon Square. 17th Street is also closed. Constitution Avenue is open today. Our traffic center is open and presented by WindowNation. Buy two windows, get two free. Visit windownation.com. Dave Daldine, WTOP Traffic.