> If time is wasted driving, is building more efficient cars really the solution? To first approximation, humans have a fixed amount of daily attention span.[1

> If time is wasted driving, is building more efficient cars really the solution? To first approximation, humans have a fixed amount of daily attention span.[1] Automated driving will effectively increase the workforce by ~5%. The base rate of "maintenance attention" is already supplied, so much of the 5% will go to the margins, increasing the rate of progress. Since progress compounds exponentially over time, this is huge. [1]Research I have read on the optimal length of work week, and other research on performance after sustained vigilence.