Imagine NY to DC in 40 minutes. Or central FL to DC in 4 hours instead of 17. Think of the jobs it would create, to have bullet trains criss-crossing the Nation. DC to Seattle in 8 hrs, and have your own car with you upon arrival. Philly to Chicago in 2 hours.
If you had trains running from DC to NYC in 40 minutes, all you’ve done is turn Washington into a suburb of New York City — and vice versa. How many jobs does this actually create, unless it’s in a massive Federal bureaucracy?