This is for those of us stuck in town for the labor day weekend. From the WMATA website:
Red Line trains will single track between Rhode Island Avenue and Fort Totten to allow for platform reconstruction. Throughout the weekend, Red Line trains will operate between Shady Grove and Glenmont every 15 minutes in each direction. On Saturday and Sunday, between 9:30 a.m. and 9 p.m., additional trains will operate between Shady Grove and NoMa-Gallaudet U stations, providing service an average of every 7-8 minutes between these stations. Red Line customers traveling through the work zone should allow about 10 minutes of additional travel time.