I tried to email a traffic problem to TrafficUnit@seatacwa.us and ended up with the email bouncing.
People turn left out of the Light Rail drop off at 176th and International Blvd, thereby going the wrong way until they can move into the correct lane. I have also seen people turn left into the oncoming traffic lane from International blvd to enter the light rail drop off. Treadles would stop both . . .