To warn other cars it is coming through!
Police cars have sirens.
Yes
the sirens tell people that a car is coming also it sends a signal to stoplights for a go.
yes you can press the circle button when driving the police car
The french police drive terrible cars with terrible sirens were as the Miami police department drive good cars with good sirens, also they have a better way of processing people and information in the Miami police department. Also, the Miami police probably need better training, because Miami is the most crime-filled state in the US.
Policies and laws vary from state to state, but in my locality, police officers basically use sirens (and lights) any time they are responding to an emergency call. If they are responding to a silent alarm, they may choose to not use sirens, but that's not common around here.
Looking at pictures of these Police cars it does not look like they had sirensAdded: I believe that they used alarm bells or "military horns" (alternating high-low pitch)
Sirens on a police car either makes "Noise" or "Wails".
Police sirens
Police should not speed if there not chasing anyone or if there lights are not on or there sirens are not on
Police sirens are designed to be 120db loud from 10 feet away. This is the same volume as a jet engine or a rock concert.
There are quite a number of various places that one can purchase police sirens. Some of the best places to buy these are Extreme Tactical Dynamics, Office Playground, and fleetsafety.