When should a driver use hazard warning lights on a motorway?

Correct Answer

When the vehicle has broken down.

Explanation: If your vehicle breaks down on a motorway; drive it to the hard shoulder and switch on the hazard warning lights to warn following traffic. When it is safe to do so; get out of the vehicle and move behind the barrier. Call for assistance from a motorway emergency phone or using a mobile phone (call the Gardaí).