Thanks for the corrections. I think I've got it right now. In this particular case large trucks cannot make the turn due to the geometry of the roads.

This is/was my first No Left Turn edit on OSM.

What you're saying makes total sense. So what I find a bit odd is that if I add new road as a driveway the default for access is a grayed "yes," which I understand to mean as an implied default. Is this the setting you are suggesting?

Thanks for the note. I wasn't aware of that. I won't use a Google Maps as a source going forward.