[deaddodo]

The cost for Amtrak and other commuter train services is inflated due to the fact that the rails are owned and/or preempted by commercial rail services. The whole point of California building out the line, directly from tax dollars, is to go around that. A dedicated line drops in price, is far more reliable and can be managed by text according to traffic.

[Gibbon1]

I'm slightly unsure but I think CHSR runs next to freight rail lines for a fair amount in the central valley. And I think CHSR is also paying for part of CalTrain's grade separation and electrification. So benefits aren't exclusive to CHSR.