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

417. Which of the following is the most correct explanation of a frozen/icy road in winter?

  1. ①It occurs mainly in tunnels, and the road surface becomes an icy road as the fog particles freeze.
  2. ②Black ice often occurs on bridges, at tunnel entrances, and on shady roads.
  3. ③Black ice occurs when snow contaminated with vehicle fumes accumulates on the road surface.
  4. ④When passing through an icy road, reduce speed as much as possible by not operating the steering wheel and braking suddenly.
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Answer ②

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 118 (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.