What do temporary traffic lights at road works mean?

1. A.A driver must comply with the lights when workers are on site only.
2. B.A driver must comply with the lights at all times.
3. C.A driver need not comply if a convoy of traffic is going in the same direction.
4. D.A driver need only comply when there is oncoming traffic.

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.