You have completely miscategorized my edit.  The edit summary says "Road closed for construction".  According to the wiki the tag is used "for any type of highway...currently under construction and impassable by the traffic".  Since there was a fence blocking access on the north end and there was adjacent construction activity this was the most logical tag.  Accessing from the south was not and still is not possible as there is a gated facility which appears to be owned by WSDOT.  Admittedly I didn't mention the fence in that changeset, but you definitely jumped to the wrong conclusion thinking that the tag was added for the purposes of "access by construction vehicles".  I will note that vehicles would likely not have been able to traverse that road for the construction of the houses as this road would be outside the lot lines: the way is drawn on freeway right-of-way: https://aqua.kingcounty.gov/assessor/emap/InternetPDF/qs_NW172504.pdf

You claim I failed to add the fence as mention in the comment.  You are half right.  See way 454116173: the existing barrier's geometry was updated to reflect closer to where it meets the sidewalk.  I failed to update the tags, and I have since fixed that.

The reason I deleted the way was very clearly mentioned in changeset 171005060: there is a fence here, not a gate.  At best, the road would need to be detached from its northern intersection, but realistically it's not clear if there's really a road here anymore.  There are vehicles blocking visual sight lines from the south which makes it difficult to see if there's a road or if this is just barren land.

These real-world changes are newer than any imagery available in the area.  I can assure you that the outline of the building for way 216577897 is inaccurate but I do not have information to accurately re-draw them without updated aerial imagery.  I only know of these two low-resolution images: https://blue.kingcounty.com/Assessor/eRealProperty/pictures.aspx?ParcelNbr=2603370000&View=0&BldgId=0 the second of which accurately depicts the new fence.