Another sort of similar super annoying thing around me... I live off of a long stretch of 55mph state highway that doesn't give many opportunities to pass, except for the occasional passing lane, which are few and far between. For some reason, everyone seems to mistake the passing lanes for speed zones. Example: get stuck behind someone going like 45mph, can't get around them; finally a passing lane appears, and boom, suddenly they're f'ing speed racer, going 70+; then sure enough, passing lane ends, and right back down to 45. See it almost every damn day, everyone does it (and to clarify, the speed limit does not increase in the passing lanes, it's still 55mph).