A nine-day Amtrak service outage in mid-October could affect riders who travel between Union Station, Alexandria and points south.⁠ ⁠ Part of the rail that guides trains to certain tracks, known as interlocking, needs to be replaced between Oct. 16 and Oct. 26, Amtrak said.⁠ ⁠ News4's Adam Tuss reports.⁠ ⁠ #amtrak #VRE #unionstation #virginia #washingtondc