Metro will continue its rebuilding effort this weekend, April 27-29.
The work begins 10 p.m. on Friday, continuing through Sunday and causing system closures on both the Red and the Blue lines.
The Red Line will single-track through two work areas this weekend.
The first work zone is between Forest Glen and Takoma for platform reconstruction and fiber optic cable installation at the Takoma and Fort Totten stations.
The second is between Van Ness and Farragut North for fiber optic cable installation (which is expected to improve cellphone reception), rail fastener renewal, tunnel leak repairs and track bed cleaning.
Between 9 a.m. and 9 p.m. Saturday and Sunday, Metro will run extra trains between Farragut North and New York Avenue, with trains arriving every 12 minutes.
Red Line trains will operate every 24 minutes between Shady Grove and Glenmont over the weekend. Riders should allow for 20 extra minutes of travel time.
On the Blue Line, Metro will be replacing worn wooden rail ties between the Rosslyn and Pentagon stations. The Arlington Cemetery station will be closed, with trains operating in two segments: between Rosslyn and Largo Town Center, and between Franconia-Springfield and Mt. Vernon Square.
Blue Line riders should add at least 15 minutes to their travel times.