I'm guessing that the people in A are simply turning too wide (into 2) so B by default has to swing wide into 3 to avoid an accident. The problem is that if someone is coming from the opposite direction to make a right hand turn into 3, then B has nowhere to go. I have a turn like this on the way home every day and it's pretty common for the same thing to happen. In a perfect world I would simply maintain my lane, let A hit me and then they would be at fault. The problem is that it's one thing to be right, it's something else to prove it. A lot of these side-swipe scenarios end up 50/50 because it's almost impossible to prove who was in the wrong lane. And a 50/50 claim does the same thing to your insurance as a full blown at-fault. Solution: drive a 1987 Chevy Suburban and maintain your lane...lol. Nobody's gonna screw with that.
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