Probably a lidar on the inside to detect mess? :) They can certainly have a video/image feed of the inside, to remote check if it is messy once the ride is ov

Probably a lidar on the inside to detect mess? :) They can certainly have a video/image feed of the inside, to remote check if it is messy once the ride is over(can be automated to a good extent with image recognition), and retire it from service until its cleaned up.