Exactly. I want absolutely zero gray areas when I'm on a highway in the middle of Indiana at night and cross paths with at least a few hundred semi trucks. The less gray the better.
To your point, a few winters ago I was driving up the NY Northway (north of Albany) in January, in a heavy snow storm, and cargo trucks were consistently passing me at 70+ mph.
One deer or one owl into traffic...it would have been a complete charlie foxtrot.