Over the years, all my Rosa descendents were anxious in the car at first, then settled down with age, and only showed excitement when the van stopped.
And then there was my problem child, IBIS. She was a screamer, at many things. The van specifically _ we put her in a wire cage in the van (then the truck), like we use at home, about 2 1/2 ft wide, 3 ft deep, 3 ft high. She got to the point that she screamed for the first 5 minutes, settled down, but every stop sign/light, screamed, quietly gradually to blood curdling. I was always reminded of the story I heard on the old basenji list about the neighbor in the apartment building calling 911 because there was a woman being murdered in the apartment next door - and it was the basenji!
She did best with the highway driving.
Never poop or throwing up, it was anger, not the driving itself. When we stopped I think she felt she could get out NOW.
She went through life thinking "I'm the Ibis, gotta love me!"
To the poster that has the screaming dog, I'm very sorry, it is not fun. Luckily Ibis was so good natured, and so lovable she got through it (us too).
Sorry, got off topic - Ibis would feel that's fitting, Gotta Love me! She is the one that we were more outwardly sad when we helped her cross the Rainbow Bridge when she was allowed to pass. She was 16