John, do Americans use the words 'traffic circle' for what we in UK call a 'roundabout'? If so, I never knew that! My husband passed his driving test last year, and the one thing that froze him to his seat in terror was roundabouts, which in Ivory Coast are unknown. But he now says they're excellent, as they filter the traffic without the need for lights, just as long as one uses them correctly. In Suffolk there is a USA military airbase, from which newly-arrived American personnel were zooming out onto the tiny UK roads in massive saloon cars and whizzing willy-nilly round roundabouts causing cardiac arrests in the general population. Their Commander ordered a short driving course in negotiation of such strange foreign obstacles, which sorted it out.