I'm sure it's entirely feasible to build such a thing, but try to find a case prosecuted because of a detector van, or results used as evidence. It doesn't appe

I'm sure it's entirely feasible to build such a thing, but try to find a case prosecuted because of a detector van, or results used as evidence. It doesn't appear to have ever happened. And where is the detector van union? Memorial service for the driver who crashed? Job postings?