What is the condition under which you may use hazard lights while moving on the road?

The appropriate use of hazard lights while driving is primarily to alert other road users of potential danger or to indicate that the vehicle is not moving as expected. Utilizing hazard lights is most appropriate on an unrestricted multi-lane carriageway or motorway when you are in a situation that may confuse or endanger other drivers.

Using hazard lights in such contexts helps signal to other road users that you are experiencing a problem or that there is a hazard ahead. For instance, if a vehicle is moving slowly or has broken down, activating hazard lights can warn drivers behind to exercise caution.

In other scenarios, such as residential areas, using hazard lights may be unnecessary unless you are actually stopping to drop off passengers or if you’re involved in a situation that warrants additional warning. Using them in bad weather conditions is typically interpreted as a signal to slow down and could inadvertently confuse others if not used correctly. When waiting at a traffic signal, your vehicle is already stationary, making hazard lights redundant and potentially misdirecting other users' attention away from standard indicators, such as brake or indicator lights. Therefore, the multi-lane carriageway or motorway context is the clear situation where their use is both appropriate and necessary.