How will vehicle drivers know that it is time for pedestrians to cross?

• They will see a red flashing pedestrian-activated traffic light.
• They will see an orange flashing pedestrian-activated traffic light.
• They will see a yellow flashing pedestrian-activated traffic light.
  Explanation:

  "When drivers see a yellow flashing pedestrian-activated traffic light, they should slow down to 30 km/h and yield to pedestrians who are crossing or waiting to cross the street. "
• They will see a green flashing pedestrian-activated traffic light.