My answer to the question "Do Norwich get car sick?" is that they can, but in general that they do not or they get over it.
I live in the country. So my Norwich get long car rides whenever we go anywhere - vets, classes, and especially shows or trials. I sometimes have a young puppy who will get car sick once, but then they seem to get over it and they do not have a problem later. They get their "car legs" (similar to "sea legs" for those who get sea sick).
One puppy I bred never got car sick with me, but their new owner reported that the dog got car sick. I suspect that the dog was only taken on short rides, with lots of sudden stops and turns. I have heard from old-time dog breeders that the best way to cure a dog of car sickness is to take the dog on a multi-day cross-country car trip to a specialty show; they predict that by the time the dog arrives the dog will be cured of car sickness. While I have learned from bitter experience that not everything that old-time dog people say is correct, this has an element of truth. So long highway car rides are something to try to cure car sickness.
I used to subscribe to the theory that a dog in a car seat high enough to see out would not get car sick ... until I had one dog who did. Now I believe that it is safer if dogs are crated while in a car. (If ever there is an accident, a rescue worker would most likely be attacked by a loose injured dog ... which might delay rescue for people in the car.)
Friends have reported that the drug maropitant (trade name: Cerenia) is good for dogs with motion sickness.
References:
Genetic variants associated with motion sickness point to roles for inner ear development, neurological processes and glucose homeostasis, Hromatka et al., Human Molecular Genetics, 2015.
Motion sickness: an overview, Leung et al., Drugs In Context, 2019.
8 Aug 2020