I have always had awful travel sickness.
so many people have given fantastic tips but best for me by far is sitting in the front, having plain crisps to eat really slowly, talking to take mind off it and enough wipes and something to be sick into on motorways.
it's not ideal at all, but some people will just always have it, and it shouldn't prevent you from ever going anywhere, I think the best thing is timing, if I can ever go to sleep on a journey then I always wake up feeling sick but at least I haven't been sick.
This is REALLY disgusting, and I don't want to overstate, but like with morning sickness, if you know you are going to be sick then better to eat something which doesn't taste horrific coming back up again.
bananas, crisps, ginger biscuits, toast all help, as does peppermint tea.
I am never car sick when driving so I think that's because you are concentrating and in control of how fast you go.
also, for me I stop feeling sick when we stop and then start feeling sick when we go again, so stopping every twenty minutes just makes a journey endless. Sometimes it was better for me just to get it out of the way early on, but I am guessing if you have more than one it might set the other off.
sorry for you all, motion sickness is grim xxx