I believe drivers are better equipped to drive safely when they have a good view of other traffic. To this end I propose that vegetation on roundabouts and at corners be kept to a minimum.
Roundabouts: foliage and other be kept below 50 cm - the height of headlights on an average car. This will ensure indicators can be clearly seen across the roundabout.
Intersections: foliage (particularly hedges and bushes) should be sufficently cleared so a driver at the intersection can see 45° to their right and 45° to their left.
