I used to live in a remote mountain village, located on one of the main highways across our central mountain range. 8km or so of the highway leading into the village was narrow and winding with no shoulder - the road lines were cut in the horse and coach days, so not designed for cars. It was surrounded by forest, often with bluffs on one side and a 20m drop on the other.

People crossing the centre line on blind corners because they were driving too fast were a real hazard on that section of road.

One summer (when the road was busiest) the Police ran an operation where a helicopter observed the road, and identified vehicles cutting corners, who were then pulled over outside the 8km stretch where it was safe to do so by waiting patrol cars.

They only ran it for a couple of weeks, but the calming effect of it on bad driving on that stretch lasted months, it was awesome.

So the Cessna might not be about making money, and more about the potential presence of the Cessna changing driving patterns increasing safety.