I have always been able to read while in a moving vehicle. Jolly good thing,when I consider that I had to travel an hour and a quarter EACH WAY by train when I lived in Victoria. This didn't count the buses at either end!! I also could do my tapestry,embroidery and even draw other patients. Travelling was never wasted time in my opinion as I somehow managed to always do something I enjoyed.
Haven't been on enough long trips by car and those I have been, I've been talking with the driver/other passengers.
I can read on trains, when I used them daily for my various activities, I would read a book a week on average.
Buses I can read on as well, but the closer proximity of passengers and bumpier roads means it's bit more of a challenge.
I travel to and from work by bus each day (30 minute commute either way). There's only so many times you can stare out of the window so...I read books, write in my diary, work out my fortnightly budget and text my husband. Makes the journey seem shorter!
I haven't been able to read in any bus/car/train for a couple of years now, due to my cataracts. I've had 1 eye repaired, & I'm waiting for the other 1 to be done, but I don't like carrying a book in my bag, because of the weight, but I do carry my camera, & I'm always looking out the windows for things to photograph! So, before my eye trouble, I was ok reading on the bus & train, if I had too, but had a bit of trouble reading in the car. Someone once told me, it was rude to read in the car, & I should be talking or looking at the scenery! If I'm talking to the driver, I feel I'm distracting them.