What should you do when you see headlights or red tail lights in foggy conditions?

• Maintain your current speed.
• Increase your speed to pass the vehicle quickly.
• Slow down even more because it is hard to judge distance.
• Turn off your headlights to avoid glare.
  Explanation:

  "Reduce your speed further when you see headlights or red tail lights. These indicate the presence of another vehicle, and due to the fog, it may be more difficult to accurately judge the distance between your vehicle and others."