On 15/08/2016 11:11, Dan S. MacAbre wrote:

Talking of obstructing the view, there are a few roundabouts near us
which have bushes and trees cultivated on them (they are obviously
maintained, so their presence is not accidental). Not being able to see
over the roundabout is a bit of a bloody nuisance. Do you suppose they
do this on purpose? They seem to like punishing motorists round here.

Yes, it'll be deliberate. Same as the barriers on the central
reservation as you approach a roundabout to stop you seeing it. The idea
is it restricts your visibility, so forces you to slow down - I suspect
this works as intended, reducing accidents.