Automatic Recognition And Classification Of Passengers' Emotions In Autonomous Driving Vehicles Introduction Development of autonomous driving vehicles is a challenging activity, with technological, ethical, and social implications. People use cars for over a hundred years, and during all this time period the vehicles have been operated by human drivers. Due to this habit, it is simpler for people to trust another person with respect to a computer to drive their vehicles. So, it is important to consider their social implications in order to avoid making the expected safety improvement useless due to a lack of trust of people on those vehicles.