Some people can read in the car.  Some can’t.

I can.  I’ve been spending a lot of the time in the car recently, but I’ve mostly been behind the wheel.  Not a lot of time for reading.

There was a one guy who was able to read while traveling.  From Acts 8:28:

He was returning and sitting in his chariot, and was reading the prophet Isaiah.

Sometimes a bumpy road can make it difficult to read.  But a modern car on a modern road, as compared to riding in a chariot?  The dude was righteous!  (eventually, anyway)