I don't necessarily think that will be the case. As far as I knew (and from re-skimming the wiki article), car sickness (and any kind of motion sickness) is caused by the brain seeing different things than what it's processing from the inner ear. http://en.wikipedia.org/wiki/Motion_sickness

So it's more up to the individual in question, then the driver (considering a normal, average car ride, not anything in the extremes).