[georgesimon]

So you're saying the rate of change of compensation (or "jerk rate" when entering and exiting a curve, as people enjoy calling it) is worse on tilting trains?

I would love to see some data - I assumed this was a solved problem, but I wouldn't be too surprised if the tolerances were revised to fit the problem.

I forgot to mention the 'interesting' part of this problem: that the effects are measured cumulatively. That is, against passenger journey length. Drivers and other staff are not considered as far as I know!