Maintenance will affect travel on the Red, Orange, Blue and Yellow lines this weekend, the transit authority announced.
Metro has developed a list of major track work projects through June 2012, but each week it adds less disruptive projects to the list. The projects announced Monday require trains to share tracks around work zones, but will not shut stations and split lines.
Red Line: From 10 p.m. Friday through the midnight closing Sunday, trains will share a track between Grosvenor and Twinbrook while workers do platform repairs.
On the other side of the line, trains will share a track between Takoma and Forest Glen. Workers will be replacing train controls, installing cables, refurbishing track ties and upgrading stations.
Trains will leave the ends of the line about every 24 minutes. On Saturday and Sunday between 9 a.m. and 9 p.m., additional trains will operate on the interior part of the line, between Grosvenor and Fort Totten. Trains should arrive at those stations about every 12 minutes.
Metro said riders should allow about 20 extra minutes to get through the work zones.
Blue/Orange lines: From 10 p.m. Friday through the Sunday closing, trains will share a track between Eastern Market and Stadium-Armory . Workers will be replacing rail fasteners. Orange Line trains also will share a track between Vienna and West Falls Church while crews work on refurbishing the tracks.
Blue and Orange Line trains will leave the ends of the lines about every 24 minutes, but riders should allow about 20 extra minutes to get through the work zones.
Yellow Line: From 10 p.m. Friday through the Sunday closing, trains will share a track between Pentagon and L’Enfant Plaza. Crews will be working on the tracks on the Potomac River bridge.
The weekend trains will operate between Huntington and Mount Vernon Square stations, rather than continuing north to Fort Totten. They will leave about every 24 minutes. Allow about 20 extra minutes for the work zones, Metro said.
Next big disruption
The next track work to close stations is scheduled to occur on the Red Line the weekend of Aug. 20-21. Buses will replace trains between Fort Totten and Glenmont. Takoma, Silver Spring, Forest Glen, Wheaton and Glenmont stations will be closed.
Also that weekend, Orange Line trains will share one track between Vienna and West Falls Church, and Blue Line trains will share a track between Stadium-Armory and Addison Road, and between Arlington Cemetery and Pentagon City.