Agree completely with using the visitor lane rather than crossing over someone to get into the resident lane, but the real problem is that all of the procedures described for safe use of the roundabouts only work if everyone is entering from the same spot. If the "how to do it charts" were viewgraphs and you overlaid them, rotating each one 90 degrees, at the end you'd have lines (read that cars) crossing over each other, which is what happens. The only real answer, which would never happen, would be to funnel traffic to a single lane entering the circle and making the circles single lanes. It wouldn't impede traffic all that much and the problem would be largely solved. Just my humble opinion.
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