After Michiganders tested the first wave of driverless buses, the greatest gripe was the lack of music. “There’s this clear trend where people were not commenting on the autonomy at all,” said Kelly Bartlett, the Michigan Department of Transportation’s policy adviser for autonomous vehicles. “One of the main reactions people had was ‘you should add music.’” Indeed, a 2019 study from the University of Alabama found 65% of people who rode in a driverless vehicle said there should be fewer restrictions on autonomous vehicle testing, whereas 76% of the pedestrians who haven’t interacted said the current regulations were necessary.