From VDOT:
In April, the Virginia Department of Transportation begins a $48 million project to repair and resurface six and a half miles of badly deteriorated pavement on Interstate 66 between the Capital Beltway and Route 50 in Fairfax County. To minimize impacts to motorists, all lane closures will take place at night—between 9 p.m. and 5 a.m., Sunday through Thursday nights. The project will be complete in the fall of 2012.
Beginning April 4, two of three lanes on eastbound I-66 will be closed weeknights from 9 p.m. to 5 a.m. between the Beltway and Route 50.
Beginning Monday, April 18, the same closures will begin 9 p.m. to 5 a.m. weeknights on westbound I-66 between the Beltway and Route 50. Crews will limit the work zones to about two miles at a time. The closures in both directions will continue Sunday through Thursday nights through November 2012, weather permitting.