Proper mirrors would allow the driver to see most of those side blind spots, or at least tell something is there. A fish eye mirror at the bottom would catch anything missed by a flat mirror. The important thing is to not hang out in those areas when you can go ahead and pass. And don't try to squeeze through when a truck is swinging out to make a wide turn, because at some point he definitely can't see you, and may not even feel you get run over.