More track work on the Metrorail system will cause hangups on all but the Green Line this weekend.

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WMATA says that work on the Blue, Yellow, Red and Orange lines will cause single-tracking starting at about 9:30 p.m. Friday and ending when the system closes on Sunday night.

Here's a rundown on what you can expect on the rails. As always, Metro encourages you to add time to your commute.

Blue/Yellow Lines

Blue Line trains will single-track between Stadium-Armory and Addison Road-Seat Pleasant. Yellow Line trains will single-track between Braddock Road and Pentagon City.

On Saturday and Sunday, Blue Line and Yellow Line trains will only operate every 30 minutes.

Red Line

Red Line trains will single-track in two places: between Grosvenor-Strathmore and Twinbrook, and between New York Avenue-Florida Avenue-Gallaudet and Rhode Island Avenue-Brentwood. Trains will operate across the line about every 16 minutes and will run every 6-10 minutes between Friendship Heights and New York Avenue.

Orange Line

Single-tracking will occu between Ballston and West Falls Church. On Saturday and Sunday, every other train in the direction of Vienna-Fairfax will terminate at Ballston.