"Even if driverless transport technology arrives, it would take quite sometime for it to be adopted on a massive scale."
It will take as much time as factories can produce 100's of millions self-drive retro-fit kits, or alternatively, the average write-off time of a truck, say 5 years? Because 95% of companies that don't start transitioning to self-driving the day after it becomes available on the general market, will not be able to compete within the year or 2 after.
"I think people are underestimating how many new jobs could be created."
A company providing a fully automated solution for all of that is, what, 300-500 people? So let's say there would be 10 of those (which is too many, consolidation and all). Let's say that we round that up (double) to 10000, and then say we're off by a factor of 10. That's 100k, vs 3.5 million jobs now (counting just truckers, and just in the US, so not even counting all 'associated' jobs).
This whole 'but there will be new jobs' thing doesn't stand up to even the tiniest bit of math, even with very generous assumptions. And that's not even considering the nature of those new jobs. Someone who is a truck driver now, isn't going to be a software engineer, or even a sales guy. There are going to be vast portions of the population who will not be qualified to do any of the jobs that the automated ones will generate.
I don't know the solution, and I don't think UBI is it, but what I do know is that the commercial availability of self-driving cars will hit the labor market like a Mack truck (pardon the pun).