Trucking is probably going to be one of the things that's harder to automate, and given the way things are going we best hope they don't given the absolute bloodbath it would create for labor (trucking is one of the most common professions in the US). I would wager that would lead to unrest in a way we've not seen in a long time.

We have self driving trucks in the United States today. They operate on public roads, today. (Eg by Aurora)

Most people assumed that self driving trucks are easier to automate since they just do highway driving with limited turns.