Red Line trains between Shady Grove and Glenmont will operate every 24 minutes this weekend, according to a Washington Metropolitan Area Transit Authority advisory.

Metro is urging passengers to allow 15 minutes of additional travel time.

Other stops affected

Between 10 p.m. Friday and closing Sunday, Red Line trains will single-track between Takoma and Forest Glen (to allow for platform reconstruction and fiber-optic cable installation) and between Friendship Heights and Medical Center (to allow for third-rail insulator renewal and rail joint elimination for a safer and smoother ride), according to Metro..

The advisory states: 

"Between 9 a.m. and 9 p.m. on Saturday and Sunday, additional trains will operate between Friendship Heights and New York Avenue stations, providing service about every 12 minutes through the downtown core."

Access Metro advisories at WMATA.com.