I remember almost hitting a cop in a roundabout somewhere in my city because they didn't follow the rules. It's a double-wide roundabout, where the outer ring must make the first right they come to and only the inner ring can continue forward or make a right. I needed to make a right from the inner lane, the cop was in the outer lane and DIDN'T TAKE THE EXIT, and I almost turned into the asshole, expecting him to turn like he was supposed to.