84 billion hours of driving[0] for 35,485 deaths[1]. That's one death per 2.4 million hours, so that's an indicator of the magnitude that's needed before even t

84 billion hours of driving[0] for 35,485 deaths[1]. That's one death per 2.4 million hours, so that's an indicator of the magnitude that's needed before even talking about it. That number also means no situations where the computer gives up and hands control back to the driver. If autonomous cars can never hand back (at most stopping legally, safely and out of traffic) and cause 1 death per 10 million hours, that would seem about right. [0] https://www.volpe.dot.gov/news/how-much-time-do-americans-spend-behind-wheel https://www.volpe.dot.gov/news/how-much-time-do-americans-sp... [1] https://en.wikipedia.org/wiki/Motor_vehicle_fatality_rate_in_U.S._by_year https://en.wikipedia.org/wiki/Motor_vehicle_fatality_rate_in...