When must drivers stop at an automated railway level crossing with barriers and red flashing lights?

1. A.When there are no lights visible.
2. B.When the red and amber lights stop flashing.
3. C.When the barrier is fully up.
4. D.Stop safely when the amber light shows, or when red lights start to flash.

This is an official-style question from the Legal Matters & Rules of the Road 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.