[ZoFreX]

Lateral acceleration is much more annoying to deal with than longitudinal or vertical, even if it's constant. Perhaps they could tilt in bends to convert some of that lateral to vertical?

[athenot]

Yes, and with no windows, there's zero correlation between acceleration and visual cues. That's a perfect recipe for motion sickness.

[delinka]

Our local trains have cars that can lean a bit on their own. Bank the track a bit, lean the car as needed, the humans on board don't recognize a turn unless they're watching intently out the window.

[dsfyu404ed]

Banked corners are a thing. The problem is that when you have delays and vehicles operating at low speeds the track is still banked

[ZoFreX]

Hence tilting - high speed vehicles tilt, low speed vehicles don't, and everything works out ok.