There are hardly any crashes on the roundabout. It is a traffic calming measure that was implemented in the 70s called the magic roundabout and apparently it works really well. Then again if you are american a normal roundabout would confuse I suppose and no I’m not being derogatory.
American roundabouts include various technological improvements, including curbs and grass (various landscaping). These high-tech additions allow a driver to understand where he or she is going. This British roundabout is merely a parking lot with a maze painted on it. But, what do you expect from a country that drives on the left side of the road?