The trucking industry has a very high turnover rate so by the time this is in place it wont displace those that have jobs it will simply eliminate the need to do replacement hires.
And they don't all live in a town together, like workers in a coal mine or large factory, so it won't blight an entire region as the main work provider closes, and then all the secondary sources of work and income close as a result, leading to a spiral of misery. Instead the pain will be spread across the country as so be easier to absorb and rebound.