> In Tennessee a few years ago along the Natchez highway the police had
> installed multiple devices under bridges or behind signs to spew Ka-band
> radar signals onto the roadway, doing pretty much what you're asking
about.
> It was effective for about, oh, the first 3 times you drove the route,
then
> it was mentally noted and very predictable.  I guess this application
never
> really caught on, since I haven't seen them around for quite a while.

THEN you randomly and variably scatter real radar equipment with real
enforcement officers just past the static beacons and find out what speed
people really travel at when they aren't worried by nasty radar traps.
Entirely as a research exercise, of course.

        RM

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