If you are in the United States, Unless you have authorization, you can only install a P.A. and Electric Air horn on your vehicle. It is otherwise illegal to possess or install an emergency siren.
Sirens on a police car either makes "Noise" or "Wails".
the sirens tell people that a car is coming also it sends a signal to stoplights for a go.
Police cars have sirens.
Yes
yes you can press the circle button when driving the police car
radio notepad pens computer speaker lights sirens citations cage
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.
Yes
The protocol for drivers who hear police or ambulance sirens, in America at least, is to pull one's car over to the side of the road and stay idle until the cop car or ambulance is safely ahead.
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.