This weekend, Red Line trains will single track through two work zones, according to Metro's website:

• Between Friendship Heights and Van Ness stations, to allow for track improvements and fastener and insulator renewal.
• Between Rhode Island Avenue and Fort Totten stations, to allow for installation of cable and signal components, as well as track maintenance.

Throughout the weekend, trains running between Shady Grove and Glenmont will operate every 24 minutes, Metro reported.

Between 9 a.m. and 9 p.m. on Saturday and Sunday, additional trains will operate between Van Ness and NoMa-Gallaudet, resulting in service about every 12 minutes between those stations, Metro added.

Customers traveling through either work zone should allow 15 minutes of additional travel time, Metro advised.

Learn more about scheduled track work on all Metro lines this weekend at Metro's website.