What does it mean when a ambulance has its lights on with no siren?

There are a few reasons why an ambulance might have its lights on with no siren.

* The ambulance is responding to a non-emergency call. In some cases, an ambulance may be responding to a call that is not considered to be an emergency. This could include things like transporting a patient to a doctor's appointment or taking someone to the hospital for a routine checkup. In these cases, the ambulance driver may choose to not use the siren in order to avoid causing unnecessary alarm.

* The ambulance is traveling through a residential area. In order to be courteous to residents, ambulance drivers may choose to not use the siren when traveling through residential areas. This is especially true at night, when people are more likely to be sleeping.

* The ambulance is following another vehicle. If an ambulance is following another vehicle, such as a police car, it may not use its siren in order to avoid causing confusion.

It is important to note that even when an ambulance is not using its siren, it is still important to yield to it. Ambulances are always responding to emergencies, and they need to be able to get to their destination quickly and safely.