Three of Metrorail's five lines will see work over the weekend.
Trains on the Red, Orange, and Blue Lines will run every 20 minutes this weekend instead of the usual 12, because of a variety of work being done on tracks and stations platforms.
On the Red Line, between 9 a.m. Saturday morning and 9 p.m. Saturday night, additional trains will run 10 minutes between the Dupont Circle and NoMa-Gallaudet stations.
Among the work being done this weekend is the removal of rail joints on the Blue Line to ensure a smoother ride between the Van Dorn Street and King Street stations. Yellow Line service this weekend will be unaffected between Huntingdon and Fort Totten, while service on the entire Green Line will run as normal.