You are driving on a road where thick fog makes it hard to see ahead. What is the most appropriate way to drive?
💡 Hint
When fog or similar conditions cut visibility to 100 meters or less, you must reduce the maximum speed by 50/100 (Article 19(2) of the Enforcement Rule). Think about what you can use as a guide to stay in your lane when you cannot see ahead, and whether closing the gap to the car in front helps safety.
Answer: ②
Explanation
In fog you notice a sudden stop ahead late, so slow down, increase your following distance, and keep to your lane using the lane lines. Article 19(2) of the Enforcement Rule requires cutting the maximum speed by 50/100 when fog or similar limits visibility to 100 metres or less. Tailgating, frequent lane changes or speeding up all raise the risk of rear-end and side collisions.
Legal basis: 도로교통법 시행규칙 제19조 제2항 제2호 가목, 안전운전 일반: 안개길 운전