Which code indicates a situation that requires lights and sirens?

The code that indicates a situation requiring lights and sirens is Code 3. This designation typically signifies an emergency response where immediate action is necessary, such as responding to a life-threatening situation or serious incidents requiring urgent assistance. When lights and sirens are used, it alerts other road users to yield to the emergency vehicle, facilitating a faster response time.

In many dispatch protocols, Code 1 generally represents non-emergency situations, while Code 2 indicates urgent but not life-threatening incidents that may not necessitate the use of lights and sirens. Code 5b may pertain to specific operational or administrative procedures, not directly related to emergency response. Thus, Code 3 is specifically designed to convey the urgency of a situation, justifying the use of lights and sirens to ensure swift action.