[gaadd33]

Acela in the NE Corridor exists as does Virgin Trains (post COVID it's operated under the name Brightline) from Miami to Orlando.

Only 2 of the 4 you listed haven't come to fruition.

[wthalheimer]

Acela and Virgin Trains are not high speed rail…

[lesuorac]

To complement this, the Acela has a top speed of 150 mph; it can only travel that fast for ~10% of the distance between Boston and DC though [1]. It fastest leg from NYC to DC averages 82mph (about as fast as driving on 95 at night ;) )

[1]: https://en.wikipedia.org/wiki/Acela#:~:text=Acela%20trains%2...