Are all emergency vehicles required to use both lights and siren when operating in emergency mode?

When operating in emergency mode, not all emergency vehicles are mandated to use both lights and siren. The choice stating that it's not a requirement reflects the understanding of the laws and operational guidelines that govern emergency response.

For instance, while many emergency vehicles—such as ambulances and fire trucks—may often use both lights and sirens to alert the public and clear the way, there are circumstances where it may be beneficial to use only lights without the siren. This could be due to the nature of the call, such as in situations where silence is critical or in residential areas where the use of a siren could be disruptive or counterproductive.

Additionally, different jurisdictions might have varying regulations that allow for flexibility in how emergency vehicles respond. Understanding when and how to appropriately use lights and sirens is an essential part of emergency vehicle operation training. This flexibility helps officers and emergency responders manage their response based on situational needs and local policies.