Metro says trains five of the system’s six lines will run every 16 minutes throughout the weekend to accommodate track work.
Metro began recruiting riders Tuesday to help test its next-generation fare payment system, which includes contactless credit cards and mobile phones.
The Army Ten-Miler race will bring rolling road closures this weekend to parts of Washington and Arlington, Virginia.
Metro trains will start running two hours early on Sunday to help runners traveling to the Army Ten-Miler.
Metro officials plan to close three red line stations in Bethesda for 14 weekends in 2016 to repair persistent leaks in the tunnels and to avoid a long-term shutdown of the red line that had been feared.
Metro says trains on the orange and red lines will be affected by weekend work.
Hundreds turned out to see acclaimed violinist Joshua Bell play at Union Station Tuesday.
Metro announced Monday it is partnering with American University to provide late-night Metrorail service from Navy Yard-Ballpark Station for fans attending post-season Nats games.
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The head of Metro announced Wednesday he is stepping down after four years at that post.