There are two main types of tilt: active and passive. Active tilt uses a computer, armed with track geometry knowledge, to control the tilt. Passive tilt is jus

There are two main types of tilt: active and passive. Active tilt uses a computer, armed with track geometry knowledge, to control the tilt. Passive tilt is just the centrifugal force automatically tilting the train. The first one is very comfortable. The second is probably what you rode -- it's pretty bad.