Driver's license written test question bank, effective 2026-03-09

379. Which of the following is the most correct action to take when the driver of the vehicle ahead stretches his/her arm horizontally out of the left side of the vehicle?

  1. ①Slow down as the front vehicle is expected to turn right.
  2. ②Switch to an upper lane as the front vehicle is expected to cross.
  3. ③Overtake the front vehicle as it is expected to make a U-turn.
  4. ④Slow down as the front vehicle is expected to change lanes.
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Answer ④

The English PDF has no explanation for this question. The Korean page carries the official explanation. Korean version of this question

Source KoROAD Safe Driving Integrated Civil Service, Driver's License Written Test Question Bank [English] (effective 2026-03-09), post 1923, Download the source PDF source PDF page 107 (checked on 2026-09-04). The question and answer are the KoROAD text as published. The buttons and notes on this page were written by the developer and have not yet been checked by a native speaker. The questions and answers themselves are the official KoROAD text.