 Traffic and weather on the 8th. Over to Robert Workman in the WTOP Traffic Center. Serious crash closes the northbound or inbound lanes of Route 4 Pennsylvania Avenue between Dower House Road and Presidential Parkway. The other side of the road is Suitland Parkway as you come in towards Joint Base Andrews and the Beltway. So traffic coming in from Upper Marlboro can't get any further than Dower House Road. You can divert out.