I drive on the M80 ring road everyday (Melbourne), and just about ever day there is an incident on there.
Many of these incidents involve trucks. I am not against trucks or truck drivers. But in my view, most truck drivers I see driving are always swerving between lanes, in the right lane knowing they need to exit the Freeway soon, on their phones, etc.
I know a couple freeways already have the ban in place, and I would love to know the stats on these roads, but I think it should be nationwide. I don't see any reason why a truck needs to be in the right lane of a freeway.