[EBH]

Ok thanks.

So I still sort of think something malfunctioned. I don’t see a reason to get up to 106mph for 5 or so minutes and then have to dramatically slow down for the 50mph curve? It just seems odd to me? Trains take a while to slow back down. If you have less than 11 minutes, there’s no reason to be up at that 106 speed.

[Paladin2]

Being hard on the brakes in the turn adds forces to help tip the train over to get off the tracks.

[indthkr]

"I don’t see a reason to get up to 106mph for 5 or so minutes and then have to dramatically slow down for the 50mph curve?

This kind of operation is not unusual on the Amtrak NE Corridor.

For example, trains leaving Washington Union station will accelerate up to nearly 90mph before having to stop just a few minutes later at the New Carrolton suburban station.

More like a subway, as opposed to a freight train.