Well, another option is that the government could pay for Amtrak’s track the way they do for roads. We don't make car manufacturers or taxi/bus companies pay for the roads, so I don't see why it's on Amtrak to pay for their own rail.
On the highways, the government has taxed motor vehicle fuels at the federal and state level (supplying occasional infusions from the general fund) and occasionally set up tolls for specific projects, generally setting higher for more intensive use (trucks). Thus bus and truck operators pay for use of the highway, perhaps occasionally joined by taxpayers generally.
By contrast, on the railroads, Burlington Northern Santa Fe or whoever purchased the rail from the decrepit husk of bankruptcy that preceded it, and upgraded it, and installed all the new safety equipment, and maintained it over time. The capital involved here is, by and large, private.
So there shouldn’t be any surprise that the situations are different.
I don’t know why you want to drag in manufacturers, though. It seems to muddy the water.
