Roundabout fences reducing visibility

[Vonhelmet]

They are there to reduce speed entering onto a roundabout, if you stop due to them they have proven the point that you were entering the roundabout too fast...

And if, say, without them you might have been able to see 100 yards up the other entrances to the roundabout? Then what?

Yes, our roundabout slowdown fences are a huge success! It's not safe to enter the roundabouts at high speeds, because there are roundabout slowdown fences there that obscure your visibility! It's a good job we put roundabout slowdown fences there so that people don't enter too fast when their visibility is obscured by the roundabout slowdown fences!