Is it not possible to make them rollable? Paulzmay has made rollable traffic stoppers which are likewise fixed track objects.
Yes and they actually do however the passengers also roll so they are not vertical, OK on a slight slope not on a 1 in 40 (2.5%) grade, though as they all lean badly to one side.
Got it down to 10m however annoyingly is suffering from the can't get rid of shadow as all the AJS invisible stations are, actually it's not a shadow it's the mesh the animation is attached to that's supposed to be invisible but isn't, it's slightly higher than the track....