Lucy, I have the same problems in cars, although it has gotten a lot better. I agree that when I'm driving I have better control of avoiding bumps and slowing down gradually. I still drive only short distances and not at all if I feel to dizzy. I wonder if it is possible to desensitize my head. If the pain is caused by overactive nerves and tense muscles, shouldn't there be some kind of exercises to to? I still can't sleep on my back because it hurts my head. I guess I need to ask my neurologist about this and hope he has an answer.