[thackney]

they could use the actual automated speed control systems used for trains in other countries.

Already used on parts of the same line, but not yet in all locations.

Red indicates Sections of the Northeast Corridor equipped with positive train control, click pic for source

[Spktyr]

Yes, they have it now, but for *decades* Amtrak refused any sort of positive train control system despite lavish funding. That system they’re installing now is only because Congress *forced* them to with a law.