In State v Dantonio, the New Jersey Supreme Court held that the evidence of radar speed meter readings should be received into evidence upon a showing that the radar was properly set up and tested by the police officer. Similarly, the Appellate Division held in State v Wojtkowiak that the K-55 radar device is completely reliable as a speed measuring device. Likewise, laser radar devices and Vascar have also been accepted by the courts as being scientifically reliable.
HOWEVER, the scientific reliability of the radar device is only one part of the proofs the state must offer during trial for the radar speed reading to be admitted into evidence. In addition to proving the reliability of the device, the state must prove that the device wasproperly calibrated and operated by a trained and experienced police operator.
For example, in connection with the K-55 radar instrument, the state should adduce evidence as to the specific training and extent of experience of the police officer operating the radar, the calibration of the machine prior to stopping the defendant through the use of tuning forks, which should also be independently calibrated, and the calibration of the speedometer in the patrol car if the K-55 is operated in moving mode.