In which case is this sign installed?
💡 Hint
A caution sign whose arrow bends around something tells you which side vehicles must pass on (Enforcement Rule, Appendix 6). See what the arrow avoids and which way it goes, and distinguish this from the cases where lane-ending or road-narrowing signs are installed.
Answer: ①
Explanation
A picture with an arrow swerving right around an obstacle at the top is a caution sign warning of a point where traffic must keep to the right (Enforcement Rule, Appendix 6, No. 121). It is installed when there is an obstacle in the middle of the road, on the right side of the road 50-200 meters before the obstacle. The other options are the cases for the two-way-traffic, left-lane-ends, and road-narrows signs.
Legal basis: 도로교통법 시행규칙 별표6 121 우측방통행표지