 Keep in mind, Constitution and Pennsylvania Avenues are going to be closed at this point between 9th and 15th Streets, as well as Mass Avenue between 11th and 6th Streets. For a full list of those closures, you can visit our website at WTOP.com. Northbound BW Parkway, headed past Nassau, got a single lane, gets you by the work zone there. Out of the loop near Pennsylvania Avenue, the work is in the left lane.