Routing, grade separation, and signaling are things any train system must deal with. The lesson from CAHSR is that the California government was too incompetent to be able to handle something that many governments around the world handle just fine.
As to Trump—CAHSR had already failed by the time Trump took office. He simply demanded the federal government’s money back.
The lesson from CAHSR is that the California government was too incompetent to be able to handle something that many governments around the world handle just fine.
How do you get incompetence from being sued at every turn by people trying to micromanage the CAHSR project? The trump approach of ruling by fiat doesn't work in the real world.
As to Trump—CAHSR had already failed by the time Trump took office. He simply demanded the federal government’s money back.