Hello NFZANMNIM, thank you for the response back. Focusing on NH87, it is unclear whether available resources can verify vehicular activity that is consistent with primary classification. OSM follows verifiable, on-the-ground mapping principle so other people seeing the map can reach the same conclusion; this excludes mapping things for how they will be in the future. These roads currently appear to function as tertiary road as opposed to primary road. If roads in subject are still passable, I would be curious whether assigning a specific set of construction tags instead, like construction=minor or construction=primary, would work (https://wiki.openstreetmap.org/wiki/Key:construction#Highways). In addition, opening_date=* and check_date=* would respectively inform users of an expected date for project completion and the last time a user checked on a project’s development. 

If you have any recent information on these highways, and in particular, the NH87 route that you could share, that would be great. I would be interested in learning about the projects’ development.

-ChromeLotus