What is the purpose of hazard lights?

The purpose of hazard lights is to warn other drivers of a temporary road hazard or to signal for assistance. When activated, hazard lights flash simultaneously from both the front and rear of the vehicle, making it clear to other motorists that there is a situation requiring caution or awareness. This may be needed if a vehicle is stalled, involved in an accident, or is otherwise unable to move safely. By using hazard lights, drivers can alert those around them to take appropriate measures to avoid potential danger, ensuring a safer environment on the road.

The other options do not accurately reflect the primary function of hazard lights. A lane change is typically indicated with turn signals, not hazard lights. Displaying a vehicle's speed is unrelated to hazard lights and is usually indicated by the speedometer or speed limit signs. Communicating with pedestrians involves different means, such as eye contact or signaling, rather than the use of hazard lights.