On long, unpopulated roads, the wail sound is used. The quicker wail is used in slow traffic. The very rapid "phone ring" type siren is used in heavy traffic areas.
There are no modern sirens - unless you mean the term - even so Greek sirens were mythological monsters that explained to the people of that time why it was ships and sailors sometimes did not return.
It depends on the vehicle. Different manufacturers have different systems.
Usually it means Lights & Sirens.
it means there is no accident happening...yet
They probably think that the sirens are howls of other coyotes.
I think it has to do with the mythical sirens who lured sailors to their death with their beauty and their haunting songs causing them to sail into the rocks.
(in the US) Some cities and towns have installed a system at major intersections that can be activated when an emergency vehicle (fire apparatus - ambulance - police) are on an emergency assignment and approaching that interesection. The flashing strobe is an indication to motorists to be alert for emergency vehicle traffic and be prepared to stop regardless of the indication of the regular traffic lights.
A flashing red light on an emergency vehicle means stop. A flashing blue light means that the emergency vehicle is authorized to treat red traffic lights as being yellow, drive on an emergency use only lane on a highway, and disobey the speed limit.
Siren has been modernized to mean "sexy" or what is desirable about the woman.
The SOS light on your Mercedes ML 350 indicates that the vehicle's emergency call system is activated. This feature automatically contacts emergency services in the event of an accident, or it may signify that there is an issue with the system that needs attention. If the light is illuminated without an emergency situation, it’s advisable to check the vehicle's manual or consult a dealership for further assistance.
When this code come out may be haven no enough warm up on the catalyst is efficienecy the vehicle has an exhaust leak
A vehicle with a flashing green beacon is typically used by authorized emergency services, such as volunteer firefighters or emergency medical personnel, to indicate that they are responding to an emergency situation. The green light alerts other road users to yield the right of way to these vehicles. However, regulations can vary by region, so it's important to be aware of local laws regarding flashing green lights.