Road signsQuestion 30 of 424
A red-bordered triangle with a black arch shape

What does this sign mean?

  1. Road narrows ahead
  2. Tunnel ahead
  3. Hump bridge ahead
  4. Falling rocks ahead
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Correct answer: Tunnel ahead

The sign warns of a tunnel ahead.

Source: The Highway Code (Department for Transport, GOV.UK), Traffic signs, Warning signs, Mostly triangular

Practice road signs

Questions last reviewed: 18 October 2026