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

425. Which of the following is NOT true about icy roads during winter months?

  1. ①Icy roads are more common on concrete roads than on asphalt.
  2. ②Ice melts slower on asphalt roads than on concrete.
  3. ③The friction coefficient of an asphalt surface increases to 1.6 when dry.
  4. ④Under the same conditions, the road friction coefficients of frozen concrete and asphalt surfaces are equal.
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Answer ③

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 121 (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.