1. It is a sign that the traffic light is out of order and you should follow the instructions of the road signs that are placed there.
  2. There is no difference between flickering-green and green light; hence, there is no need to pay special attention to it.
  3. It is a sign that the green light is about to change in three seconds.
  4. It is a sign that the light turned green a short time ago and you can continue driving.
Picture for question 518