Japan is building a self-driving transport corridor to automate cargo transport between Tokyo and Osaka and wants to extend the system to the whole country.
Why are they making it so needlessly complicated? They can just use existing highways and vehicles with Level 4 self-driving. They don't need new separate roads.
That said, this points to the future. Even if true Level 5 self-driving is several years off, there is plenty Level 4 can do now. That includes all cargo driving on highways. I doubt most trucker jobs have long to go. Some will say they are needed for last-mile delivery. Some companies are soon going to figure out a profitable system for having human drivers locally for that, but self-driving vehicles for the long stints on highways.
My dad is a trucker and he's the one loading and unloading the cargo, plus he's the one guarding it and being liable for it.
There's a long way before an automated truck drives up to a loading bay and anyone will touch it. (Or wont touch it in case loading bays get automated too).