What I am trying to do is have the AI train come from the portal, enter the siding, drop off three cars. Then I want to direct the human driver to go to the siding and couple onto the cars and take them back to the yard. The AI train follows its orders. The nav points direct the driver to the siding. However I cannot issue a couple command because the rule won't accept a car not already on the route. I don't know if what I want to do is even possible.