Which statement about traffic safety facilities is correct?
Check who installs and manages traffic safety facilities (Article 3(1) of the Road Traffic Act) and what their installation and management standards must take into account (Article 4(2)). Compare any statement with absolute words like 'only' or 'regardless of' carefully against the provisions.
Answer: ③
Explanation
Article 3(1) of the Road Traffic Act calls traffic lights and safety signs together "traffic safety facilities" and has the mayor, etc. (special/metropolitan city mayors, the Jeju governor, city mayors and county heads) install and manage them. On toll roads, the road manager does so under the mayor's instructions. Article 4(2) requires standards that keep them visible regardless of day, night or weather, so considering only daytime is also wrong.
Legal basis: 도로교통법 제3조 제1항, 제4조 제2항