no
It is not a requirement to show RADAR readings in Illinois.
Most police officers I have met will show you the readings. As one officer stated, "It just shows the driver I have the proof".
five years
With correct application, traffic radar reads true speed or lower than true speed virtually 100% of the time.
Generally no, but if used around any naval base or military aircraft facility you run the risk if their radar systems causing major damage to your equipment due to the strength of their systems.
If they have the permission of the property owner, either expressed or implied, yes, they may do so. The legality of the "shot" is not affected regardless of where the radar/laser equipment is actually sited. If you are the property owner and would prefer that the police did not use your property, a simple request to that effect made the agency superiors should be sufficient.
no, unless of emergency
Unless there is some specific reason that the police cannot be in that place, they are probably allowed to operate their radar gun. You may wish to ask a local attorney for information specific to your circumstance.
Of course.
most likely, yes. an officer can set up a speed trap anywhere he chooses. private property he may need the owners permission, but i don't think that matters. get an attourney.
A radar that the police use to detect stuff.
A radar that the police use to detect stuff.
There is a device called a radar detector, but it will only detect a radar signal, not police in general.
i don't the answer
It is not a requirement to show RADAR readings in Illinois.
Having a radar detector will alert you when a Police Car with its speed radar is near. The Radar Detectors will produce an audible signal alerting you of this, and will do so far in advance of when you are able to see the Police Car.
The answer, both technologically and legally, is "No". Most modern in-car Police radar systems can work while the vehicle is moving.