[hughesjj]

Also you can rack up miles on the interstate like no one's business on a road trip etc. imo it should be by unit time not unit distance but I could see the argument for distance

Same with planes. Like yeah if you wanted to make the same trip without a plane it's way more dangerous but what if you just wouldn't take the train from coast to coast in the first place?

IDK, imo time is the most important tradeoff for transport when doing per capital/etc measurements