It could mean several things, a few I know are: You have to pay extra to be transported with lights and siren's. If it is not a life threatening emergency they tend to not put on the lights. However they also do not put on the lights for someone who has passed away.
the ambulance is going to the hospitalthe ambulance has its siren onthe ambulance is moving (:PJHS
yes
Whatever colour they happen to be painted (one can not see the siren usually). I hope you are not confusing the siren (which makes the noise) with the flashing lights (which are blue).
If the ambulance was using red lights and/or siren, you are obligated to yield the right-of-way. You are likely responsible for this collision.
It is illegal but maybe you can buy it from someone who stole it from the ambulance, or maybe the people who build the ambulance siren is kind and give it to you. But it is not legal at all.
Not just ambulances, but many other emergency and police vehicles have a warning siren and flashing lights too. The lights and siren is to warn other road users ahead that a vehicle is on an emergency call and needs to get to the emergency as quickly as possible.
The word "siren" comes from Greek mythology. In the Odyssey, the sirens were singing monsters that lured sailors to their deaths with their sumptuous voices.
Both are warnings of potential trouble.
When ambulances are responding to a Priority One job (urgent situation) they activate the sirens and warning lights to alert other vehicles to let the ambulance through. The ambulance siren can be set to a variety of different sounds and volumes.
110
yield to the emergency vehicle
nee-naww nee-naww :)