The use of name tags for numeric names in that are was based on the pre-existing tags for other such roads in the area eg https://www.openstreetmap.org/way/122109629 tagged by https://www.openstreetmap.org/user/eric22.

https://www.openstreetmap.org/way/252724820 appears in Bing imagery to be a continuation of https://www.openstreetmap.org/way/346053155 with no junctions or exits, and with the same grade of highway. I suspect that the highway=tertiary is probably incorrect in this case.