I assume ceteris paribus because that is most likely in a democratic nation. It’s unlikely that the U.S. public would agree to hike their taxes by 10% to pay for a radical national transport restructure. Change usually takes place gradually. Economical EV trucks, which are probably less than a decade away, will negate the need to impoverish the nation. They will plug neatly into the existing infrastructure.
Still, the U.S. really does need rail improvements. These can and should happen either way.