What i know of the location of the Sti-r's antenna is the higher = the better.

As for stealthing the heads of the Alp while maintaining effiency ...
the trick is in the pudding .

Autorities start with good freedom then they tighten the screw ! as for the Gps based announcement
of photo-radar ....when $ get low ...

Roadway is now a big kindergarden ...only adults use cms