What is a key feature of an ambulance that distinguishes it from other vehicles?

A key feature that distinguishes an ambulance from other vehicles is the presence of emergency lighting and sirens. These elements are essential for alerting other drivers and pedestrians to the vehicle's presence, especially when responding to emergencies. The use of distinctive lighting, such as flashing lights, and audible signals like sirens allows ambulances to navigate traffic safely and efficiently, ensuring that they can reach emergency scenes as quickly as possible. The combination of these features creates a sense of urgency and informs other road users about the need to yield, which is critical during emergencies when every second counts.

While large cargo space, specialty tires, and all-terrain capabilities can be advantageous in specific contexts, they do not fundamentally define the role or function of an ambulance as effectively as the emergency lighting and sirens do.