I was going to reply "well, in the US this is law..."
The I stumbled onto this article[1] while looking for evidence to cite. It appears that I've been grossly mistaken.
[1] https://highways.dot.gov/public-roads/mayjune-2000/one-mile-...
The I stumbled onto this article[1] while looking for evidence to cite. It appears that I've been grossly mistaken.
[1] https://highways.dot.gov/public-roads/mayjune-2000/one-mile-...
The US using highways never made sense since unlikely to need them, and have a ton of civil airfields that could be used. Using highways makes a lot of sense for Sweden and Finland that are under threat and doesn't have civil aviation.