Which statements about horns and sirens are correct?

Every licensed motor vehicle is required to have a horn that is in good working condition. This requirement exists to ensure that drivers can signal their presence to others on the road, thereby enhancing safety. A horn can be used to alert other drivers and pedestrians when necessary, helping to prevent accidents.

Furthermore, in the context of sirens, it is indeed true that only law enforcement and emergency vehicles are permitted to use them. This regulation is in place to help distinguish these vehicles from regular traffic, allowing them to respond to emergencies efficiently. The use of sirens by non-emergency vehicles could create confusion and disrupt standard road safety protocols.

Therefore, both statements about horn requirements for vehicles and the exclusivity of siren usage to emergency vehicles provide accurate information regarding traffic regulations.