What does the term "code 3" response refer to?

The term "code 3" response specifically refers to responding with lights and sirens activated. This terminology is commonly used in emergency services and indicates that the responding vehicle is prioritizing a rapid response to an emergency situation, where time is critical. The use of lights and sirens alerts other road users to the presence of an emergency vehicle, allowing it to navigate through traffic more effectively and quickly reach the scene of an incident. This response mode is essential for situations that require immediate assistance, such as medical emergencies or critical incidents.