As usual, like a lot of things, this turned out to be a simple and profound solution.
This really helps with difficult edits in Blender. Draftsight is so much more precise.
By simply changing SCALE under IMPERIAL in Blender to 0.0254 I'm able to cross platform between Blender and Draftsight.
I was having an issue editing the roadway to be one continuous span from anchorage to anchorage, but this technique solved it pretty quickly.
(addendum. Apparently it makes no difference. I'm having a hard time wrapping my mind around this. Perhaps it has been a long day and my brain is not functioning in an optimum way.... Whatever. As Scarlett says, I will think about it tomorrow.)
