For the life of me I can't find the link, but there was an awesome HN or Reddit post a few years back where a designer tried to design a touchscreen experience that might work for cars that takes into account that drivers can't focus on the screen.

It's been years since I've seen it so I probably don't remember the exact details, but I think it worked by the system working based on gestures wherever the drivers' hand touched the screen so you didn't need to touch a specific tiny target in a moving car.