* https://en.wikipedia.org/wiki/List_of_countries_by_rail_usag...
For the US it is 0.3%.
Given that CH is land-locked, it's not surprising that freight modal share is 46%, because it has to get inland from a port in some way:
* https://en.wikipedia.org/wiki/List_of_countries_by_rail_usag...
This is higher than the US, but give that 127M Americans (40%) live in counties that are on the coast, it's probably not too hard to get things to them:
* https://oceanservice.noaa.gov/facts/population.html
* https://www.livescience.com/18997-population-coastal-areas-i...
Heck, Los Angeles county has a population (10M) larger than CH (8.5M), and would be the 10th largest state (between NC and MI):
* https://en.wikipedia.org/wiki/List_of_states_and_territories...
So a good number of Americans can get goods pretty direct without long distance inland shipping.
* https://en.wikipedia.org/wiki/List_of_Panamax_ports#Pacific_...
And from any of those it's probably not that far to any major population centre.
Compare to Switzerland, which has precisely zero ports, and so of course needs rail (and trucks) to get things delivered.
Note that ships are much more used in Europe.