What about high-speed ski lifts or gondolas that detach so they slow down when you get off?,(reply>), Arguably it would be more like that to my mind as the whole system was built as an integrated unit. Unlike say a regular vehicular elevator like the one to access the residents parking of the flats a friend of mine lives at which is rather more complicated by the fact it needs to figure out how to capture a vehicle that can be of assorted dimensions and was not designed to engage with such an elevator. Doable of course but more complex the system in use there has sensors that find all 4 of the wheels and locks each in place with a pair of ~5cm steel box beams maneuvered into position with hydraulics that look like they could easily lift several metric tons vertically though I presume they are designed to be fail-safe even in the event that the vehicles full tractive effort was to somehow be engaged to the task of trying to ram the restraining mechanism out of the way. This is after all presumably a failure one has to account for whether due to failure of the vehicles control systems or input from the driver whether involuntary as the result of a medical condition like a seizure or the probably more likely case of the vehicle being commanded by a bloody moron that tried it just because.