A Metro train arrives at Farragut North. (Luz Lazo/The Washington Post)

Some passengers on the Red and Orange lines will wait longer for trains this weekend.

Metro track work will affect the two lines between 10 p.m. Friday and the rail system’s midnight closing  Sunday.  All stations will be open but the schedules on the Orange and Red lines will be adjusted because trains will share single tracks around work zones.

Red Line. Crews will work on track insulators and the railroad ties and fasteners between Takoma and Forest Glen.  The agency will undergo testing of new railcars between Twinbrook and Shady Grove.  Trains will run every 20 minutes between Shady Grove and Glenmont; More trains will be in service between Grosvenor and NoMa-Gallaudet from 9 a.m. to 9 p.m. Saturday and Sunday.  During those hours, trains should arrive the platforms every 10 minutes.

If traveling between Fort Totten and downtown Washington, you may consider using the Green or Yellow lines.

Orange Line. Between West Falls Church and Vienna, crews will work on track insulators and the railroad ties and fasteners. All along the line, trains are scheduled to reach the platform every 20 minutes throughout the weekend.