Silly Season ...
I fully expect Ms Roberts has also checked the position of the roads in these areas, noting their height relative to aircraft height and track. Otherwise she might just look a little bit silly if it turned out that roads were roughly the same altitude as a legally planned and flown LL route that would by default give drivers a view of the crews.But of course she would have checked that first before complaining?
As for the drivers, surely they should be concentrating on the roads rather than playing at plane spotting!