Trains were single-tracking from Rhode Island Avenue to Fort Totten.
The road has reopened for drivers.
As part of its showcase of "innovation and design," Lexus spearheaded a project to design a hoverboard.
The firms' work focuses on revamping Metro's image and preparing its executives for two-days of hearing before the National Transportation Safety Board.
Henry Kay says his departure is "totally voluntary" so he can pursue a private sector job.
The ramp will reopen on Saturday now.
Motor Vehicle Administration and transportation authority get new leadership.
Officials still don't know what is causing the 96-foot girders to crack and say the investigation will continue.
The earlier delays were caused by problems at Union Station and Anacostia.
Big backups of traffic on Interstate 95 north in Franconia.