More delays are expected before the 11-mile extension of the Silver Line, which includes stations in Reston Town Center, Herndon, and Innovation Center.
According to a report by NBC 4, officials say its possible trails will not be rolling until 2021.
Service was expected to begin over the summer, but due to delays with electronic testing and deficiencies in concrete panels and other structural components, opening day was pushed to December 2020.
Metro has not yet indicated when it plans to accept the project from the Metropolitan Washington Airports Authority.
Staff photo by Jay Westcott