From WMATA:
“On Saturday, April 25, and Sunday, April 26, free shuttle buses will replace trains between Stadium-Armory and Downtown Largo on the Blue and Silver lines.
Rail service will be suspended at Benning Rd., Capitol Heights, Addison Rd., Morgan Blvd., and Downtown Largo. Crews will be working on air blown fiber installation. This installation method facilitates faster completion of the work, minimizing the need for longer station closures.
Service Information
Blue Line: Trains between Franconia-Springfield and Stadium-Armory will run every 12 minutes (every 15 minutes after 9:30 p.m.) . There will be no Blue Line service between Stadium-Armory and Downtown Largo. Customers should use the free shuttle buses for travel between those stations. End-to-End travel time is estimated to take 30 minutes on the Express shuttle and 50 minutes on the Local shuttle.
Orange Line: Normal service
Silver Line: Trains will run normal service between Ashburn and New Carrollton. There will be no Silver Line service to Downtown Largo.
Yellow Line: Normal service
Red Line: Normal service
Green Line: Normal service”