What is the definition of "lights and sirens" response when responding to an emergency call?

The definition of "lights and sirens" response in the context of emergency vehicle operations refers specifically to the combination of emergency lights and audible sirens used to signal urgency while responding to an emergency call. This approach is designed to alert other road users and pedestrians of the emergency vehicle's presence and to encourage them to yield the right of way. Using both lights and sirens increases visibility and awareness, effectively communicating the urgency of the situation and ensuring safer passage through traffic.

In contrast, utilizing only lights or only sirens would not fully convey the same level of urgency and could potentially lead to misunderstandings on the road about the emergency vehicle's need to proceed quickly. Therefore, the correct answer encompasses both elements—emergency lights and sirens—working in unison to achieve the primary goal of safe and swift emergency response.