A short segment of the right lane on the southbound side of the George Washington Parkway is closed throughout the day for Pepco repair work.
The lane closure, between Four Mile Run and Marina Drive, just south of Reagan National Airport, started at 10 a.m. and is expected to last until midnight.
Pepco spokesman Marcus Beal said that the work is taking place inside a manhole. Workers are repairing an underground cable that failed. No power outages are expected.