I hesitate to enter this foray, but... I think the sign at the roundabout is tricky to decipher quickly when you're new to roundabouts. There's a lot of info there that you must translate from a graph into words in your head while still watching the road. I get it now, but it took a few times passing the signs, plus someone on this forum explaining to treat a roundabout like a four-lane intersection.
I think some kind of signage with words under the graph sign would be helpful... Something like DON'T TURN LEFT FROM THE RIGHT-HAND LANE, YOU DUMB***!
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