yea, that's the one I was talking about, i think the Dutch invented it...smart folks
Another aspect that is to be considered in roundabouts is the cyclists' safety. That's probably the only downturn of a roundabout,(much) more cyclists get injured in roundabouts than "square" intersections.
But fortunately the Dutch thought of that also...after all, there's more cyclists than motorists there, even the Prime-minister used to ride one
Bicyclists in Amsterdam