>If driver alertness is the key factor, cars should have inward facing cameras that can detect the drivers eyes so it can play a horrible noise when the driver

>If driver alertness is the key factor, cars should have inward facing cameras that can detect the drivers eyes so it can play a horrible noise when the driver starts micro-napping. This exists already [1] and is in pretty much every new car in the EU at least. [1] https://en.wikipedia.org/wiki/Driver_monitoring_system https://en.wikipedia.org/wiki/Driver_monitoring_system