Is it mandatory to use portable warning devices to indicate the presence of a car stopped on the carriageway?
Vehicle immobilizations
It is mandatory to use the hazard warning devices because they alert other drivers to the presence of a problem with the vehicle, thus ensuring road safety.
Explanation
It is **mandatory** to use hazard pre-signaling devices, such as emergency lights, to warn of the presence of a car on the roadway. These lights, which are activated by turning on all the vehicle's direction indicators, are essential to indicate that the vehicle has a problem and may pose a **danger** to other drivers on the road.
The use of these lights is **mandatory** for cars, trailers, and semi-trailers, ensuring that other drivers are aware of the situation and can take the necessary precautions to avoid accidents.
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