Someone I know has been repeatedly denied planning permission to develop a plot of land, one of the excuses, er I mean reasons

was that the Highways Agency would object to it on the grounds of visibility. Probably crap (it's a long story) but if it is true you have to wonder how they've got the gall to come up with that while they're deliberately obscuring traffic on main roads. Anyone got something like this nearby?
This one isn't local to me, though we have one not unlike it fairly close. This is actually in Wiltshire, and anyone who did the A303 trip to the West Country this bank holiday weekend will recognise it despite the slightly blurred pics.
This is the view approaching the roundabout from the west:
Doesn't look too bad, but once you get close to the roundabout, just at the point when you really want to have a good look out for what traffic may already be on it and where you might fit in a gap (or not) this is what you see:
We've talked before on these forums about being prepared to stop but planning to go when approaching roundabouts, but the clowns that came up with the idea of preventing you seeing whether its safe clearly have one aim in mind - to make nearly everyone stop. It's often possible for a half decent to see where a gap will appear on a roundabout and adjust speed to slot into it safely. But if a driver can see there is no such gap they're not going to go, so what's with the fencing?