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.

Generally the rule of thumb is that if you can see their mirrors they can see you.