When using a siren, what should ambulance drivers assume about other drivers?

When using a siren, ambulance drivers should recognize that other drivers may not hear the siren at safe distances. This understanding is crucial because environmental factors, such as road noise, wind, and distance, can significantly impact an individual's ability to detect sirens. In urban areas, sounds can be masked by the bustling environment, and drivers may be unaware of an approaching emergency vehicle even if the siren is active.

By assuming that other drivers cannot hear the siren at safe distances, ambulance drivers can take additional precautions when approaching intersections or congested areas. This understanding promotes a more defensive driving approach, where drivers anticipate potential obstacles or erratic behavior from others who may not be alerted to their presence. This proactive mindset helps ensure the safety of both the ambulance crew and other road users.