Whoa, nellie — it’s a bit backed up on some of the tracks today. In addition to some planned maintenance work on the Red Line (between Dupont Circle and Van Ness-UDC) and Blue Line (between Braddock Street Road and Van Dorn Street), a man was struck earlier this morning at the Potomac Avenue station, causing backups in both directions. The unidentified man, who was struck around 11:45 a.m., died after he was transported to the hospital. Blue and Orange Line trains were single-tracking after the incident, but now are experiencing residual delays. Plan your subterranean travels accordingly.