Law enforcement: Shortcomings of radar speed measurement: It´s based on sound principles, but present systems have practical limitations and may be misused

Well-publicized court rulings have found radar speed readings inadmissible as legal evidence, because the radars were operated in such a way as to cast doubt on the accuracy of the readings. Existing devices are, in fact, quite accurate if used within their limitations by trained operators. The problems can be overcome through better training and tighter equipment standards, while some relatively simple technical improvements in the radars can reduce present limitations significantly.