Tired truckers is a conversation that comes up in the US somewhat regularly. And some states are imposing more serious regulations. But I don't think we are seeing it enough as a cause of accidents to treat it like a crisis. As other commenters have pointed out, for long-haul trucking in the US (and other rural areas) you are mostly dealing with highway driving on pretty desolate routes. Mile for mile truckers in the US are still some of the safest drivers.

I think Alaska just stretches this to the extreme given the unique experiences. Just having truckers pull off to the side of the road in Tundra 300 miles away from services is probably a MUCH bigger safety liability than long hours.