In general, which of the following should a driver do before entering a tunnel?

1. A.Only use dipped headlights if there is other traffic in the tunnel.
2. B.Ensure that full headlights are switched on.
3. C.Ensure that dipped headlights are switched on.
4. D.Switch on hazard warning lights to alert other traffic of their presence.

This is an official-style question from the Safe and Responsible Driving 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.