9 A.M. UPDATE:
Train 332 is also running late due to late arriving equipment. It's currently near Crystal City.
6:50 A.M. UPDATE:
Train 324, also delayed by signal problems, is in Washington and will arrive at Union Station shortly.
Train 322 is running 15 minutes behind due to signal problems after Manassas Park. It is currently in Alexandria, according to VRE's live map. Signal issues might also impact train 324.