On the topic of high speed rail in America, I have two words:
PRIVATE. BUSINESS.
Look at Brightline and Texas Central Railway. Since they are both private corporations, similar to the private corporations which used to run quality passenger service in the U.S. back in the day and still run the class I freight railroads of today, they are more successful than government-funded rail operations such as Amtrak and the California High Speed Rail project, both of which are at the mercy of the government for enough funding. If they do not, then in the case of Amtrak, they have to start making cuts since they wouldn't have enough money to operate certain systems, and in the case of California, that means delays, increased costs, and shorter starting distances for the high speed line.
Private businesses should run railroads in the U.S. Period.
"Look down, step over, and watch the gap!" - Dr. John Clarke, The Gap Rap (2010)