It's not just the bumps, though, it's the acceleration. The car is inevitably going to speed up, slow down, and change direction, and I don't think there's any

It's not just the bumps, though, it's the acceleration. The car is inevitably going to speed up, slow down, and change direction, and I don't think there's any way of canceling that out. I'm almost certain I couldn't read in even a perfectly-suspended car without feeling sick.