More road construction

Driving to Mom's I saw these signs. They seem to be moving on the construction project, but unclear on the meaning of the signs.

I thought the shoulder was the part of the road to the right of the white line. There seems to be quite a bit of it there now. It is much wider than it was a couple of months ago, but I still want a passing lane.

Here they seem to think that little ditch is a trench. I am not driving this time. I am closely supervising my teenage driver. I can do that with a camera in my hand while she pulls the trailer, can't I?