When is it mandatory to use the hazard warning lights?
A)When reducing speed on the road.
B)When the vehicle is parked in double row.
C)When the vehicle is immobilised on a motorway.Correct
# Hazard Warning Lights on the Motorway
The hazard warning lights are mandatory when your vehicle is immobilised on a motorway or fast traffic road, as they warn other drivers of an obstacle. This measure is essential to prevent collisions, especially at high speeds. In other cases, such as normal speed reductions or parking, activating them is not mandatory.