RE: Apples patents24 Jan 2019 21:28
A sensor device located at the front of the vehicle's cabin could potentially monitor some or all of the people in a car, which could be used to identify individuals. These internal sensors can include light-scanning devices like LIDAR, depth cameras, and infrared sensors to collect the data, which is then passed on to the driving system.
While driving, the sensors could be used to ascertain an occupant's eye movements, body posture, gestures, pupil dilation, blinking, body temperature, heart beat, perspiration, head position, and other factors of each passenger. This data, and previous experiences of known users, can be used to create an occupant profile, and in turn enable the vehicle to select one of a number of comfort profiles.
https://appleinsider.com/articles/18/07/26/apples-self-driving-car-system-could-change-how-it-drives-by-detecting-passenger-stress-levels