The one in Beaver Hills has definitely improved traffic safety. Witnessed a lot of accidents there before the roundabout was put in. Now occasionally someone will misjudge and hit a curb or a sign, but better a minor one-car accident at slow speeds than a multi-car accident at 60 mph. Still a lot of work that needs to be done to slow speeds approaching the roundabout, but it’s been a major improvement imo.

Eta: the bike lane in BH also need work, same with pedestrian crossings.