Originally Posted by dxh13
1) what is the general % error on avg newer and older guns?
2) are officers supposed to hold the radar data when giving you a ticket? i got a bs ticket from a cop, wasn't speeding, and he told me they didnt have to be able to show it to me :(
1.) Newer guns within the last 5-10 years, nothing that would make a difference to you or the operator. The RADAR gun is worthless with out the operator. When errors do occur it's blantanly obvious. In order for me to certify someone that individual had to correctly guestimate a vehicles speed within +/- 3mph for 10 consecutive vehicles. If I saw a vehicle traveling towards me and I believe he is doing 55MPH, and the RADAR reads 65 MPH I CAN NOT pull this vehicle over for speeding. The RADAR unit emits a noise that corresponds with the tracking speed. The higher the speed the higher the pitch. If the speed reads 35 MPH and the pitch is extrememly high, than there is mis-read, and the process must start over.
step 1- guestimation of speed
step 2- verify guestimation with RADAR unit
step 3- verify pitch with RADAR display reading
If any of these steps are not verified the process must start over. I have pulled people over and felt that there may have been an error in one of the above steps and I would refuse to issue a citation (which is the way it's supposed to be).
2.) This is really up to the state. I did not have to show the RADAR reading to the offender. A lot of it has to do with saftey issues. If it was safe enough I would allow a person to read the RADAR unit and test it in front of them. I did not have to lock the offenders speed in to make a stop. I was only required to observe the speed of the offender. This really varies from state to state, and I would check your local laws on this.
This has kinda turned into a novel, so if you have any other specifics you would like answered please let me know (this stuff gets boring really damn fast) :D