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 a drivers vehicle has broken down and is stopped on the hard shoulder, they should use the vehicles hazard warning lights to warn other road users of their 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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