Shortly after 4:00 a.m. Sunday morning U.S. Park Police say that one car going south bound on GW Parkway crashed into a tree.
Police officials say subsequently one female was pronounced on the scene.
Park Police say that the Rt. 123 exit is closed as well as the Spout Run exit.
GW Parkway will remain closed between the Francis Scott Key Bridge and Dolley Madison Blvd, while U.S. Park Police reconstruction crews complete their investigation.