Driving around here in Sunny Portugal we’ve become a little puzzled.
So, high energy – voltage? – power lines have little balls on them. Different colours, red and white perhaps. OK, that’s fine, it’s obviously a warning. “Here be high voltage power lines.”
And it’s on the top strand of the set going from pylon to pylon. That’s fine.
Could be for birds I guess, something that scares them. Maybe planes? Dunno, but that’s not the question.
Observation (two incidences, you can tell we’re doing science here) says that these balls are only on that line when the lines cross a road. But they’re far too high up to have anything to do with the road. The spans away from the road don’t have the reflectors/birdscarers/whatever on.
So, err, why?