What is a common sign of an approaching emergency vehicle?

Flashing lights and sirens are the most recognizable indicators of an approaching emergency vehicle. When you see flashing lights, it is a clear signal to pay attention and be prepared to yield the right of way, as these vehicles often need to navigate through traffic quickly in response to emergencies. The loud sirens accompany these lights to further alert motorists and pedestrians of their presence, ensuring they can clear a path effectively.

While continuous honking or bright headlights might be used in some situations, they are not standard indicators for all emergency vehicles. Colored smoke is not typically associated with emergency vehicles at all and is not a recognizable cue for motorists. Thus, the presence of flashing lights and audial sirens serves as a critical protocol to keep everyone on the road safe in emergency situations.