How many judges know enough about the technology present (or not present) in speed cameras to legitimately scrutinize it? In any case, I was under the impressi

How many judges know enough about the technology present (or not present) in speed cameras to legitimately scrutinize it? In any case, I was under the impression that it was just a radar gun which tripped a camera once a speed some threshold over the limit was detected. The expensive part would be something to find and OCR license plates, and presumably feed that into some other automated system - theoretically a one-off software cost.