My DD is not a great car traveller. And we have preschool run three mornings a week. Unfortunantly I have to just let her scream it out. One day I had an appointment and it took an hour and half to get home which was due to road works. She screamed the whole way home hysterically, it was awful and because I had another spot to be I couldn't pull over. She survived, me on the other hand was a nervous wreck by the end. She just has to get use to it. I make sure she is fed, and dry and clean and that she has had enough time to get up any wind. I figure maybe she gets car sickness, who knows whats going on in there little heads. I know I don't like to be rear facing on buses or trains. Maybe she is the same. Goodluck