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

933. Which of the following statements about the activated left-turn signal shown on the safety sign is incorrect?

This is a picture question. The picture is not included on this page, so you need page 315 of the source PDF to answer it.

  1. ①When a vehicle stops within the rectangular marking (detection line) on the road, the sensor is activated and detects the vehicle.
  2. ②When there are no left-turning vehicles, extra time can be allocated to the straight-through signal.
  3. ③It helps improve traffic flow, and air pollution is expected to be reduced.
  4. ④To operate it, the driver must stop and press a switch installed on the left-hand side of the road, and then wait briefly.
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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 315 (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.