By its literal definition. First world describes the US and its allies, the second world described the Soviet bloc, and the third world is everyone else/the non-aligned nations.

I guess it depends on your driving habits but I have most of my metro area mapped in my head and I can get roughly from one place to another without directions. For new places I’ll usually look at where it is on a map before I leave and I can navigate mentally. I usually only miss traffic tracking because I’ll get stuck in traffic I could’ve easily avoided with gps apps.