[1] https://en.m.wikipedia.org/wiki/List_of_countries_by_rail_tr...
We're talking about Semi Trucks here, so clearly this conversation is in regards to cargo.
"3000 miles of track to service land holding 60 million people" vs. "100,000 miles of track to service land holding 50 million people".
(the numbers are invented, not real)
The U.S has a lot of empty land, so this would just be a manufactured stat with arguable meaning.
Maybe part of the reason the US has less passenger rail is because freight rail is prioritized and we use airplanes and automobiles instead due to the vast distances between many of the population centers and the lower overall population density (a given random two geographic locations will have fewer people moving between them and therefore will be tougher to justify passenger rail). Also, sea transport between different coasts of Europe is a little easier than between East and West Coast in the US because you don’t need to go through the Panama Canal. Then again, the US does have a very good inter coastal waterway and good navigable rivers both via the Mississippi and through the Great Lakes (thanks, Canada!).
basically if it's worth it to put it on slow transportation "coast to coast" we have a single continuous boat path between the North Sea and the Mediterranean Sea, whereas the US does have to think twice when sending a ton of things from LA to Texas, it's either train or Panama Canal.