They've been putting in roundabouts around here lately. They're excellent for intersections that are too busy for a stop sign, but not so busy as to need multiple lanes. The problem is when old folks come up to a roundabout, they get scared and stop, sometimes in the roundabout. When you see a Buick ahead of you, be prepared to stop.
I'm also a fan of blinking yellow lights. More traffic lights should be set to blink during quiet times of the day. Traffic can govern itself better than you might expect.
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