Metro says ongoing track work will again cause delays this weekend on four of its rail lines, starting at 10 p.m. on Friday night.
On the Red Line, there will be single-tracking between Van Ness and Friendship Heights stations as well as on the stretch between NoMa-Gallaudet and Fort Totten. Red Line riders are told to expect 15 minutes of extra travel time.
On the Orange Line, there will be single-tracking between Vienna and West Falls Church, resulting in delays of 10 minutes.
Blue Line trains will single track between Stadium-Armory and Morgan Boulevard to allow for repairs to the floating concrete slabs beneath the rails for a smoother ride. Customers should allow about 15 minutes of additional travel time.
On the Green Line, buses will replace trains at Greenbelt Station only as crews replace ties and improve track conditions. Green Line trains will operate normally, at regular weekend intervals, between College Park and Branch Avenue.
Lucky Yellow Line riders should not experience delays.