Here's a video of the latest version of the humanoid robot Atlas.
Boston Dynamics has always been a leader in robotics, but there are many others not far behind it. Not only will robots like Atlas continue to improve, thanks to Chinese manufacturing they will get cheaper. UBTECH's version of Atlas retails for $16,000. Some will quibble it's not as good, but it soon will be. Not only that but in a few years' time, many manufacturer's robots will be more powerful than Atlas is today. Some Chinese versions will be even cheaper than UBTECH's.
At some point, robots like these will be selling in their thousands, and then millions to do unskilled and semi-skilled work that now employs humans, the only question is how soon. At $16,000, and considering they can work 24/7, they will cost a small fraction to employ, versus even minimum wage jobs.
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.