On an expressway, you want to move into the right lane while continuing in the same direction. When must you start signalling with the turn indicator?
💡 Hint
When changing lanes you must signal with the turn signal a set distance before the point, and the required distance differs between ordinary roads and expressways (Enforcement Decree, Appended Table 2). Remember that at expressway speeds the vehicles behind need more time to react.
Answer: ②
Explanation
Under Appendix 2 of the Enforcement Decree, when changing course while continuing in the same direction you must signal at least 30 m before the point, but on an expressway at least 100 m before. 30 m is the rule for ordinary roads, and signalling only as you cross the line gives following drivers no time to prepare. Keep signalling until the lane change is finished (Road Traffic Act Article 38(1)).
Legal basis: 도로교통법 제38조, 시행령 제21조 별표2