Yes.
If your inner ear motion doesn't match the visual motion, you get sick.
If you're reading in a car you can get car sick because your eyes don't see any motion but your inner ear is feeling the movement. The same with Sea sickness.
It's the same in reverse if your eyes see motion but your inner ear doesn't feel it.
If you're playing other games designed for the Vive where you're standing up, such as the Lab or Job Simulator, you don't get motion sick, because all of the movement in the game is from you actually moving.
The motion tracking is precise enough that you don't feel any disconnect and you won't get motion sick unless your frame rate drops or tracking glitches. Then, your brain feels a disconnect between your sense of motion and your visual input and you sRCstart to feel sick.
This has got me thinking; if the nausea is caused by the head nor registering the bumpy ride then that needs correcting. ANSWER: When driving your SRV, waving your head around to emulate the bumps and generally nodding you head in time with the bumps, like a Motorhead fan at a headbanging festival. I may try this but I tend to play ED when sitting with my wife on the sofa at nights, so I may not get away with it without "the look" - or worse. I will be following this thread to register the success of other folk in this matter.