The one thing about self Driving Trucks that many companies will gravitate towards is that it has been tough for many trucking companies to staff the last few years. There is certainly a shortage of long haul truck drivers in many parts of the country. So many people don't want to do the job. It's long hours, lots of traveling. Away time from family, and companies have pretty much put a cap on how much truck drivers can earn at this point. 49 to 52 cents a mile seems to be advertised a lot where I live...Considering DOT restriction of I believe 660 miles a day max with what a driver can drive...at 52 cents a mile pay that is $343.20 assuming they can drive 660 miles in one day. Overall, potential to earn $60,000 to $80,000 a year or so isn't bad for the job, but being out on the road and away from family is the biggest draw back with the profession. Plus...driving a big rig all the time in high traffic situations, and dealing with jackass drivers out on the road all over the country I am sure can be exhausting at times.
I can see where many companies will move to automation, BUT there are going to be caveats to it. All it takes is a major error, and catastrophic accident to get the populous riled up and wanting to ban the practice. Major law suits will happen. ...I just think it's going to be a LONG time before we get to the point that 50%+ of the trucks on the road are automated.
Also, with the cost of the technology, if they are still going to have a person on the truck...Where is the money advantage for the companies? ...Will they be able to employ people for less compensation as truck drivers, and over time they will see the value in it?