Recently I have had clients who asked about motion sickness, actually, acupuncture can definitely help with that.
Personally, when I was young, I have a lot of digestion issues as well, the car is my nightmare. Basically, most time from the gas pressure your stomach, or other organs like the spleen, liver, or small intestine are unbalanced causing your sickness when you are in a car.
But when I learned Chinese Medicine and get some treatment from tui-na massage to release the tension in my neck and shoulder and acupuncture for my digestion, My motion sickness never bothers me again, only sometimes I have some bloating and was on the plane. I massage some acupressure point with some burp after, then much better.
So making your digestion maintenance is the key to motion sickness
So if you have a long trip, you get some acupuncture treatment before you go, and ask your acupuncturist about some different acupressure points that may work for you.