The PTC system on that locomotive has GPS. Multiple redundant GPS receivers. The system wasn’t cut in yet. If it was cut in, PTC would have stopped that train as soon as it violated the first speed restriction.
This kind of crap coming from Amtrak is the whole reason for the federal PTC mandate in the first place.
Do you think that the engineers were not briefed on the fact that there was a sharp curve with a 30MPH SPEED LIMIT ? It's not like the 'route' they were taking was something that they could 'choose' amongst a host of other options. It's not like there are no maps to look at before the HIGHLY PUBLICIZED INAUGURAL RUN. It's not like the route had never been taken before (they had two practice runs).