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On a motorway, when should a driver use the hazard warning lights?

  1. A.When towing another vehicle.
  2. B.When slowing down quickly because of danger ahead.
  3. C.When driving on the hard shoulder.
  4. D.When another vehicle is following too closely.
Show answer & explanation

Correct answer: B. When slowing down quickly because of danger ahead.

Use the hazard warning lights to warn other road users of a danger ahead. For example, if you have to slow down sharply because of a build-up of traffic ahead, you can use the hazard warning lights to warn following vehicles that they need to slow down.

This is an official-style question from the Technical Matters topic of the Ireland driver theory test (Cat. B). Practise all 807 questions free on iTest.ie — with timed mock exams, automatic mistake tracking and progress sync across devices.

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