Before driving through a tunnel, what should a driver do?

1. A.Disengage the global positioning system (GPS).
2. B.Turn on side lights only.
3. C.Check that you have enough fuel.
4. D.Register at the first tunnel station.

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.