Metro has implemented speed restrictions on part of the Yellow and Blue lines following the derailment of a piece of maintenance equipment. If your commute takes you between National Airport and Crystal City, you will notice a slower train speeds.
A speed swing vehicle derailed while returning to the Alexandria rail yard after overnight work, causing minor damage to the tracks. The damage was repaired, but the vehicle derailed a second time and was parked on a pocket track until it can be examined.
Metro has not said how long the speed restrictions will be in effect.UPDATE: Metro tells us that the 15 mph speed restriction will be in place all day.
UPDATE: Metro is also reporting delays of up to 20 minutes on the Green line due to a cracked rail at Naylor Road Station. Trains are single tracking between Naylor Road and Southern Avenue.