The barriers are located on the platform edge, adjacent to the yellow warning strip, placed strategically to avoid obstructing subway car doors as they open to allow customers to enter and exit ...

After a prolonged wait for approval, Metro will begin running Green and Yellow line trains automatically on Friday.

Washington Metro's Green and Yellow lines granted approval to use automated train operation, joining the Red Line.

Dispersed periodically along the length of a station, the metal barriers sit directly adjacent to support columns and just before the yellow tactile warning strip that lines a platform edge.