What is the standard signal sequence of a four-light signal showing red, yellow, green arrow and green?
💡 Hint
The sequence of a four-color traffic light is set in Table 5 of the Enforcement Rule, and the key point is that yellow comes both when the green ends and when the left-turn arrow ends. Look for sequences where yellow is missing or out of place.
Answer: ②
Explanation
Table 5 of the Enforcement Rule sets the sequence of a four-light signal as green, yellow, red with green arrow, red with yellow, then red. Green does not go straight to the left-turn arrow but passes through yellow, and when the arrow ends, yellow comes on with red before plain red. However, under the note, the order may differ at places where it is especially needed.
Legal basis: 도로교통법 시행규칙 별표5