What is a primary reason for using hazard lights?

Using hazard lights primarily serves the function of signaling a breakdown or slow movement. When a vehicle is experiencing mechanical issues, has stopped due to an emergency, or is moving significantly slower than the traffic flow, activating hazard lights alerts other drivers to exercise caution. This visual cue is essential for safety, as it informs following vehicles that the situation ahead is unusual and requires attention or adjustment in speed or lane position.

While hazard lights might draw attention in various scenarios, their main purpose is directly related to indicating a problem with the vehicle's operation or its speed, allowing other drivers to anticipate potential hazards on the roadway. This can help prevent accidents by making other road users aware of the potential dangers they might encounter.