What does the following safety sign mean?
💡 Hint
The arrow on an indication sign draws the actual path the vehicle is to follow (Annex 6 of the Enforcement Rule). Trace the arrow from its start to its end, and do not confuse it with a parking sign just because its shape looks like the letter P.
Answer: ④
Explanation
This sign, whose arrow goes up, loops around to the right, comes back down and then points left, instructs vehicles to take a detour route where left turns are prohibited (Enforcement Rule Annex 6, No. 316). It does not mean turn left directly; it means go around the block to reach the desired direction. Although its shape looks like the letter P, it is not a parking sign, and with only one arrow it is not the pass-either-side sign.
Legal basis: 도로교통법 시행규칙 별표6 316 우회로표지