Which case did New Jersey courts recognize the Doppler principle?

The recognition of the Doppler principle by New Jersey courts occurred in the case of State v. Dantonio. This principle is fundamental in the context of radar speed detection, as it underpins how radar systems measure the speed of a moving vehicle by analyzing the change in frequency of the returned radio waves that bounce off the moving object.

In this specific case, the court affirmed the scientific reliability of the Doppler effect as used in radar technology for speed enforcement. By validating the principles behind radar speed detection, this ruling has substantial implications for the admissibility of radar evidence in traffic cases, allowing enforcement officials to rely on the technology's accuracy and ensuring that the methodologies used in speed detection are grounded in established scientific principles. The court focused on the technical aspects of how Doppler radar functions and its effectiveness in measuring vehicle speed.

Therefore, the significance of this ruling highlights not only the legal aspects of evidence presented in court but also reinforces the scientific principles that law enforcement agencies use in speed enforcement.