Is it the case that the US fundamentally can’t do what, say, Spain and South Korea and Algeria have been able to, and that they have been able to do with, say, NASA, the military and numerous private corporate logistics systems, or just that they haven’t done it yet?
From what I understand, it’s slow because along much of the route it uses legacy rights of way with level crossings. Brightline West will have all new grade-separated right of way, which will allow higher speeds.