This. People don't even realize how important it is that people operating heavy machinery are well rested, and sometimes even put down appropriate regulations as just "worker's issues". Then you get a sleepy, bored guy on a highway, with neither awareness to spot dangerous situations, or willpower left to restrain from doing stupid things. It's a testament to how good they are at their jobs that they get to their destinations at all.
I knew a driver who drove for loading at a company, and because it was taking them too long, his time for a break started before they finished. He refused to move the truck from the spot for a whole 8 hours,even though it was blocking the warehouse - he knew that if he moved it even a little bit, he(and the company he worked for) could be fined several thousand euros months down the line.
And then you get a Polish bus driver with a bus full of people going for a pilgrimage through Swiss Alps, which then fills the news for a week in two countries.
It's way better than nothing, though, and the deficiencies are something that should be fixed even within existing law (e.g. the "self-employment" could really easily be proved to be actually a normal job, if the prosecution cared enough).