ADYou’ll see two of the contraptions over the Silver Line tracks where Hunter Mill Road goes under the Dulles Toll Road/Route 267. They are designed to remind people working below that there are power lines above. The rods originally had brightly colored flags hanging from them, a warning to workers laying Silver Line tracks that making contact with the lines above them could be deadly. Wrote Rayhan: “In this case, it looks like the lines are likely transmission lines and the flag may have worn off over time. There’s a rather more low-tech approach on Route 7 west of the toll road.

Source: Washington Post October 31, 2020 20:03 UTC