I don't even attempt to read or play games in the car, or even look down for extended periods of time. Motion sickness strikes sometimes within a few seconds. It takes much longer on a bus, but that's why I started listening to audio books. I don't know why, but I seem to be most prone to motion sickness around sunset. At night I seem to be much more immune. I just hope the oculus rift agrees with me.
God, you made me laugh. I know better than to read forums in the library too.