OIML Recommendation R 91:1990 High Priority

Traffic speed meters

Scope: This Recommendation is applicable to microwave Doppler radar equipment for the measurement of traffic speed on roads, hereafter, in short, "radar". The Recommendation states the conditions that the radar must satisfy when the results of measurement are to be used in legal proceedings. The legal interpretation of the results of measurements, the choice of radar types and the conditions under which these instruments may be applied are left to national regulations.