Silver Line test trains are now running into Loudoun County.

Trains are making their way into the county from the aerial guideway on the Dulles Airport property through the Loudoun Gateway Station to the Ashburn Station.

Testing is underway using eight rail cars that were supplied by the Washington Metropolitan Area Transit Authority.

Metro asked for a pause in testing in mid-September after expressing concerns about the safety of trains when they switch tracks. Recent investigations found that the issue is not linked to possible derailment for test trains.

Although Metro signed off on allowing train testing to continue, a number of concerns with phase two of the project remain, including concrete panel issues.

Photo by Chuck Samuelson/Dulles Corridor Metrorail Project