Many times folks ask to see the radar/laser gun/machine, and its up to the police officer to allow same, it is not required. Also, most automobiles do NOT have calibrated speedometers that are accurate. If the police officer did not allow you to see the instrument, let the prosecutore know, and if you go to trail, you may inquire, but its not something the officer has to do. In many countys first offense folks can obtain in Illinois an order of court supervision for a slightly higher fine & costs, many have traffic schools, but if your license is in jeopardy because of too many moving violations, seek the advise/counsel/help of an attorney in your area who knows the court & prosecutor. Good luck...

You can always ask to see the radar/laser gun, but there is no requirement to show you the device. Further, a police officer does not even need a radar/laser or other device to measure your speed. As a former police officer, I had the opportunity and need to stop people without the benefit of any such device. They are merely to confirm the officer's observations and own judgment that a vehicle is speeding. Any officer who does not exercise his/her own judgment (independent of the device), is not properly trained and will make mistakes.

This is a common idea. There is no requirement that the cop show you the equipment.

Regarding your follow-up question about discovery, I am going to go out on a limb here and say that the answer is technically no, but you can ask and see what the judge is willing to order. Discovery in Illinois is governed by the Illinois Supreme Court rules and applies only to felony cases. Statutory disclosure is available in available in non-felony criminal cases but would not cover the radar gun. You have a constitutional right to the disclosure of material exculpatory evidence, but whether that would help you in this situation is unclear. Still, the judge is generally considered to have discretion on this kind of matter, and a sympathetic judge might order some degree of disclosure. If the outcome of the case is important to you it would be a good idea to retain an attorney familiar with traffic practice.

You can ask but there is no requirement that you be shown. You need a lawyer to minimize the damages.