A crew worked on the inbound track at Silver Spring in September, the type of job that requires trains to share one open track. (Robert Thomson/The Washington Post)


[Update: Metro has canceled Sunday rebuilding work on train lines to allow its crews to prepare for predicted winter weather conditions and ready the system for Monday’s rush hour.]

Metrorail’s Arlington Cemetery station is scheduled to close this weekend, and buses will replace trains between Pentagon and Rosslyn. Metro crews also will work on the Red, Orange and Green lines, affecting train schedules.

Here are the details on how Metro’s rebuilding work will affect service between 10 p.m. Friday and the rail system’s midnight closing Sunday.

Blue Line
Trains will operate every 15 minutes during the day between Franconia-Springfield and Mount Vernon Square. That means trains inbound to D.C. from Northern Virginia will follow part of the Yellow Line route, crossing the Potomac River via the Yellow Line bridge. Between Largo Town Center and Rosslyn, trains will operate about every 20 minutes. The free shuttle buses will take riders between Rosslyn and Pentagon. To reach Arlington Cemetery, take a shuttle bus from the Pentagon station.

Many Blue Line riders bound for Virginia from D.C. and Prince George’s County will be better off transferring between the Blue Line segments at L’Enfant Plaza than continuing to Rosslyn and boarding the shuttle buses.

Trains between Largo Town Center and Rosslyn will arrive on the lower level at L’Enfant Plaza. Trains to Franconia-Springfield, the end of the Blue Line in Virginia, will arrive on L’Enfant Plaza’s upper level.

By midday Friday, Metro’s online Trip Planner should be set to reflect these weekend changes.

In the work zone between Pentagon and Rosslyn, crews will replace track circuit modules and make improvements to the third rail and tracks, Metro said.

Red Line
Crews will work on the third rail and the tracks between Twinbrook and Grosvenor, and also on fixing leaks and improving track conditions in the tunnel between Forest Glen and Glenmont. Trains will leave the ends of the line at Shady Grove and Glenmont every 20 minutes. But between Grosvenor and Silver Spring, more trains will be in service. So in that interior zone, trains should reach platforms about every 10 minutes from 9 a.m. to 9 p.m. Saturday and Sunday.

Orange Line
Work continues on rebuilding the platforms at Minnesota Avenue and Deanwood. Crews also will be working on the tracks. All along the line, trains are scheduled to operate every 20 minutes throughout the weekend.

Green Line
Crews will work on the rails to improve the smoothness of the ride. Trains are scheduled to operate every 15 minutes throughout the weekend.

Yellow Line
There’s no work on the line, but because it shares stretches of track with the Blue and Green lines, its schedule is affected. Trains will operate every 15 minutes between Huntington and Fort Totten throughout the weekend.