If you must drive during fog, you should:

• Reduce your driving speed and be alert for tail lights of the vehicle in front of you.
  Explanation:

  "If you must drive during fog, reduce your driving speed and be alert for tail lights of the vehicle in front of you."
• Increase your driving speed and use high beams.
• Keep a safe following distance and use hazard lights.
• Accelerate and pass other vehicles swiftly.