What should be used to signal other drivers when approaching an incident scene?

Using emergency lights and sirens is essential for signaling other drivers when approaching an incident scene. These visual and auditory signals serve multiple purposes: they grab the attention of other road users, alert them to the presence of an emergency situation, and help to ensure the safety of both emergency responders and the public by warning them to slow down or move aside.

Emergency lights enhance visibility, especially in low-light conditions or during inclement weather, making it clear that an emergency vehicle is present and requiring special consideration from other drivers. The siren adds an auditory cue that can cut through the ambient noise of traffic, ensuring that even those who may not see the flashing lights are alerted to the presence of an emergency situation.

In contrast, while advanced warning signs, flashing headlights, and hand signals can all be used to communicate intent or caution to other drivers, they do not provide the same level of urgency and visibility as emergency lights and sirens. Advanced warning signs may not be immediately noticed by drivers, flashing headlights lack the authority of an emergency signal, and hand signals are often not sufficient to manage traffic effectively during an incident. Therefore, emergency lights and sirens are the most appropriate and effective means of signaling in these scenarios.