"You put a camera on the front of your car, and you set it to capture frequent images of the road ahead of you while you drive. At the same time, you capture all the data about your driving -- steering-wheel movement, acceleration and braking, speed"

I'm curious: How does one capture the car data? In the self driver car, the ML and camera part of it seems to be easier than the interface with the car mechanics, yet there's generally little mention of that part.