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

• 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 you see a yellow flashing pedestrian-activated traffic light, slow down to 30 km/h and yield to pedestrians wanting to cross the street."
• They will see a green flashing pedestrian-activated traffic light.