In what scenario should a driver use their hazard lights?

Hazard lights are specifically intended to alert other drivers that a vehicle is experiencing trouble or is in a situation where it is not operating normally. When a driver uses hazard lights while experiencing vehicle trouble, it communicates to other road users that they should exercise caution, as the vehicle may be stationary or moving erratically. This safety measure helps prevent potential accidents, as other drivers can clearly see that something is amiss.

Using hazard lights in other scenarios, such as changing lanes or approaching a traffic signal, is generally not appropriate because it could cause confusion among other drivers. For example, using hazard lights when changing lanes might signal to others that the vehicle is experiencing an issue rather than simply indicating a lane change. Similarly, using them while parked in a no-parking zone does not convey any particular warning about the driver's situation, as it is simply a violation of parking regulations. Therefore, the use of hazard lights is appropriate particularly when facing vehicle trouble, ensuring the safety of both the driver and other motorists.