Which is correct when driving a passenger car on a road where this safety sign is installed?
💡 Hint
A number without a unit inside a red-bordered circle means speed, and whether there is a line under the number tells maximum speed from minimum speed (Annex 6 Nos. 224 and 225 of the Enforcement Rule). Do not confuse it with the following-distance sign, which has 'm' and pictures of cars.
Answer: ④
Explanation
This sign, only a number inside a red-bordered circle, sets the maximum speed for motor vehicles, etc. (Enforcement Rule Annex 6, No. 224). So you must not exceed 50 km/h (Road Traffic Act Article 17, Paragraph 3). A sign with a line under the number is a minimum speed limit, and the following-distance sign has the unit 'm' and car pictures.
Legal basis: 도로교통법 시행규칙 별표6 224 최고속도제한표지