When following another Emergency Vehicle, what should you do?

• A. Maintain the Same Siren Tone as the Lead Vehicle
• B. Use a Different Siren Tone than the Other Vehicle(s)
• C. Speed Up to Pass
• D. Follow at the Same Speed

Answer: (B)

When two emergency vehicles are operating together, signals need to be clearly distinguishable so drivers can tell there are two units and know each vehicle’s position and intent. Using a different siren tone from the lead vehicle helps motorists hear and separate the two responses, reducing confusion and allowing each unit to be acknowledged and accommodated on the road. If the trailing unit uses the same tone, other drivers may treat the two as one, which can lead to hesitation or misdirection at intersections.

In practice, you should follow the lead vehicle at a safe distance and follow its directions. Do not try to speed up to pass, and don’t rely on mirroring the same tone that the lead vehicle is using. A distinct siren tone for the trailing unit improves overall safety and coordination during multi-unit responses.