Ability to teleport a vehicle like a sim crossing, but to arbitrary grid coordinates.
Something Like
llTeleportVehicleGlobalCoords(vector global_coordinates, vector region_coordinates, rotation direction );
Should either obey the current allow object entry or a new parcel setting "Allow Remote Object Entry"? .
Object should be returned to inventory if the parcel teleported to is set to no entry.
Possibly only available if object has a seated avatar? Don't really need teleporting objects.
This would probably need to be an experience function. But this could lead to heavy fragmentation and incompatible portals. Seeing as gridwide experiences aren't real, and a script in a vehicle would need to have the correct experience for the land its one etc....
Leave behind avatars that have not accepted the experience? A script could give users that haven't accepted the experience a map link to follow along after..
Mostly this would allow for road tunnels for vehicles to other places, spreading the SL road network and increasing connectivity.