You're driving in fog. When should high-intensity rear fog lights be used? You're driving in fog. When should high-intensity rear fog lights be used?

• Possible answers:

   
• A. When visibility is reduced to 100 metres (328 feet) or less
• B. When visibility is reduced to 125 metres (408 feet) or less
• C. When visibility is reduced to 150 metres (490 feet) or less
• D. When visibility is reduced to 175 metres (572 feet) or less