The US has many states. TX and CA, although large, are not the only games in town. Do they have to have the state that the truck is licensed in, keep its trucks there? If so, then they all have to go back to their place of origination. Mandatory round trips.
I guess one could also go from CA to TX loaded, and then come back to CA empty and drop the truck off at the origination place. Guess you’d pay mileage and the time used to make the round trip. And of course ,some opportunity costs….your time.
