I remember one time when I rode my bike (I can’t drive a car)… I rode it for 17 hours only with a few, typically super quick stops (I peed once). I made sure it was something safe to eat (it’s not even easy to eat stuff on a bike, I always wear a full face helmet, safety first but tiny pieces are doable) and traffic was non-existent.
Fasting is easy, I need water way more frequently, even on a bike. I don’t know why I ate. Probably because I could and the road was too straight and boring. Whatever, one single time of many joyful rides.
My SO drives a car, he eats only if there’s no traffic (or the car is stopped) and I give him a bite sized something. It’s quite rare and isn’t needed (but I might eat up the food alone). Homo sapiens specimen are supposed to be able to fast for pretty long and it’s no big deal to stop sometimes anyway.
We don’t need frequent eating on any diet, just big meals. But fat adaptation made my meals even less frequent. The timing is important though, I usually need to eat in the afternoon and only then. But one surely can solve their eating problems during the time of travel when needed instead of doing dangerous things.
If it’s a long drive, one needs to stop now and then anyway so they can eat then.
If it’s a short drive, I think it’s a big problem if snack is needed, abnormal. If the one is somewhat healthy, waiting should work and the need for a snack shows a significant problem and I’m sure the WOE if the problem in most cases. I am very controlled on my right WOE and an undisciplined glutton on a very wrong one. A good diet can solve more we would think.