As an example, just yesterday, two B-doubles crashed and blocked the highway 12 minutes from where I live. The crash caused a major fuck up for every single vehicle, they had to wait 11 hours for the mess to be cleared enough to safely reopen the highway.
As a domino effect, every business waiting on other deliveries didn't get their stuff until today. That may have resulted in loss of sales, upset customers, companies would have had to pay the human drivers for 11 hours of sitting around.
The cause of the crash was determined to be human error.
A computerised truck, on the other hand, probably wouldn't have crashed. And if it had, all the other vehicles held up would not have cost any additional wages while they waited.
The thing about automating transport is that it will be too fast. If companies don't switch to self-driven trucks in a reasonable time-frame, competition will get a large share of the market, so once one company begins, every other company will be forced to change also, or fold from excess overhead. Whichever happens, the drivers will be out of a job, and considering the number of people in the industry, these people will need a new job, because the rest of technology hasn't caught up, humans will still need a job. But where do these "new" jobs come from? Its not like there's an excess of jobs as is and not everyone will be needed to perform maintenance on a fleet of automated trucks/delivery vehicles. But its not like they can't be fired either. If the companies don't, they will very likely cripple to competition who can lower their price due to lower overhead and therefore gain more of the market. So its a chain reaction and if you don't jump on, you get left behind. The victim, in this case, is the truck drivers. They can't realistically be kept on, but firing them isn't guaranteeing them a new job and goods will still cost money and I'm hopeless at conveying my thoughts.... I'm going to quit while I'm cohesive still.