>>>>>Yeah, they're radar, aren't they, and work on the Doppler Effect principle. The hand-held, multi-directional ones are called, I think, Vascar.
>>>>
>>>>
>>>> Vascar has nothing to do with radar. It's a simple time vs distance measurement to determine speed.
>>>>
>>>>http://www.vascarplus.com/Pages/How_it_works.htm
>>>
>>>I always thought the hand-held "guns" that the UK police used were Vascar.
>>>
>>>While on the subject, do your police use a "breathalyser" to test DUI of alcohol - a gizmo that you blow into that registers the blood-alcohol level? Whenever I see progs like "The world's scariest police videsos" (or whatever), the troopers/traffic cops always seem to be farting around with the "sobriety test": standing on 1 leg, reciting the alphabet, walking a straight line, etc., but I never see the motorist blowing into anything.
>>
>>They use breathalysers here, and, at least in Ontario, if you refuse to blow you can be charged anyway.
>
>Yeah, same here. It's the OPP that do it in your neck, isn't it? How about the USA? Anyone?

I'm pretty sure it's done by the municipal police too. Never having been stopped, I don't know for sure, but I think so.