It's called a SIGNAL INDICATOR and you push it UP for the right-hand turn indicator, and DOWN for the left-hand turn indicator. So learn to use it when you're driving west on Quinpool and want to make a left turn at Oxford. And YES...you ARE allowed to turn it on when you're actually WAITING to make the turn. You don't just have to NOT turn it on while you're waiting for the light to turn green. THAT way, all the traffic behind you won't have to wait for the right lane to clear so they can pull out from behind you and try to get around you. Yep, that's the way it works...asshole. —Late...