Correct answer: A. When the vehicle has broken down.
Use the hazard warning lights to warn other road users of a danger ahead. For example, if your vehicle has broken down and is stopped on the hard shoulder, you can use the hazard warning lights to warn following vehicles of your presence.
This is an official-style question from the Managing Risk 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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