Change the game mode to the spectator in the state of riding in the vehicle you can move the vehicle in the state it is on the ride
In vanilla I was getting off the ride when I changed to spectator

The game mode is changed with a command
I am taking verification videos in 1.11.2 (It is hard to see...)
https://youtu.be/Lo9e6VSjcko

#Because these sentences are all translated from Japanese using Google translation, there may be mistakes