Good points. There have been tests on self driving trucks, but not much more. My opinion is that the tools are not mature enough, and the industry is not willing to risk putting trucks on the road that may get stuck in the middle of the trip, because there is a roadblock and it cannot circumvent it, or that it goes on big detours because it somehow sees non-existing roadblocks.

Also there is still a problem of liability. If a truck fails to give way to an ambulance or a firefighter truck, or if it gets in an accident, who is responsible? The manufacturer in theory, unless they waive responsibility to the owner of the truck, and in that case what company would risk their face and money on a technology that has not proven itself?

All in all, at the moment I see a lot of reasons to doubt the technology, and few reasons to embrace it, unless it becomes trustworthy enough that it is economically viable.

Ps. Putting trucks on a fixed route, in a convoy, feels a lot like re-inventing the train haha