"once you get past the range of a tank of gas or two."

This is like the folks who say flying is more carbon friendly than driving. It's wrong, you're comparing a vehicle running cost with one passenger vs a full vehicle normalized by its capacity.

No one flies 30 mi commutes.

Few drive 600+ mi empty or alone.

> Few drive 600+ mi empty or alone.

Is there a study on this? As I would have thought the opposite and would bet that the number driving alone is increasing as more people live alone.