See this tweet from Congressman Gerry Connolly:
All lanes of Beltway Outer Loop in Fairfax near the Arlington Blvd/Route 50 exit will be closed from 10:30 pm Sunday to 5 am Monday.#VDOT
— Gerry Connolly (@GerryConnolly) January 11, 2013
For more information, see this Dr. Gridlock post on WashingtonPost.com.