Autonomous cars sound like a great idea, right? No driving, just shuffling around safely thanks to an always-aware network of connected cars. Those self-driving cars hold a lot of promise, but we’ve not considered all the angles, it seems. What about car sickness? Not driving or riding could lead to down-time spent doing things like reading. In a recent study, U-M Transportation Research asked more than 3,200 how they’d spend their time not driving an autonomous car. Turns out, we may make ourselves sick by letting the machines drive.