We've had roundabouts in various areas here for at least 5 years. My trepidation level has gone down with experience - and we have the safest drivers in the country according to several insurance companies. Fortunately they aren't used for arterials but mostly for residential feeder streets and at shopping centers.

The divergent diamond looks like a nightmare. We already have people driving the wrong way on the interstate sometimes and that's with NO confused construction to scramble their perception of what's correct......