[Solved]What is this pair of metal... Things.. hanging on traffic light pole over an intersection?
(europe.pub)
They were on all of them in the intersection, four sets
My guess is that those are weights installed as a vibration damper. That explains the chains with which they are secured, and the box with the antenna, which would then record the results of this installation.
Does that traffic light happen to be in a rather windy area, and were those traffic lights swinging madly during storms?