begin to slow down or apply your brakes.
The purpose of the turn signal is to communicate what you're going to do BEFORE you do it.
Are you the person I always seem to get behind on a two lane road, 45 mph speed limit, who suddenly slows way down, then brakes hard, THEN turns on your turn signal?...thanks for the warning pal.
Or...if I'm sitting at a stop sign, waiting to pull out of a side road, and you're approaching the side road...how about a little blinker so I know you're going to turn...so I can go ahead and pull out without having to sit and wait and watch as you slowly approach and turn...never having signaled your intentions.
