There is existing right-of-way into both SF and LA Union station though, and the HSR plans intend(ed) to use this. Sure, you can't run the HSR at full speed on

There is existing right-of-way into both SF and LA Union station though, and the HSR plans intend(ed) to use this. Sure, you can't run the HSR at full speed on existing track, but this alone is not necessarily a deal-breaker.