But, I did - an attachable one, just to see if it was feasible. It took about 5 minutes and worked mostly fine. (I say mostly because I accidentally ran over some pedestrians, and when my leg moved, the car tilted.) Proper poses and some tweaking and I could be driving around with no more lag than a sit animation causes.

So, something to consider - if someone wants to collaborate, because I don't make car prims and I don't want to start now - we could make official CD emergency vehicles that attach.

I've got no opinion on permits one way or the other. To clarify, this is only about making cars use less resources and that a five minute test seemed to indicate that it can be done at least to some extent. I'm thinking passengers would be more difficult. Single AV vehicles though, seem easily done.