- To warn other road users of your presence,
- When necessary to avoid accidents,
- When stuck or in an emergency,
- To signal other drivers of your intentions, such as when changing lanes,
- To alert pedestrians or cyclists of your presence,
- To get attention from drivers or pedestrians who are not paying attention,
- When you are driving in the opposite direction of traffic and the road is not wide enough for both cars to pass,
- To let someone know that you are arriving somewhere.
