I'd be very surprised if they didn't repave it again in the foreseeable future, even if the council wasn't saying they expect it to reopen in September.

I definitely think it should remain as highway=construction with that in mind, plus the likelihood of there being other subsurface infrastructure there, and the unlikelihood they would use the corridor for anything but a road. Also, this will prevent lazy people from re-adding the road as if it were open, without checking - seeing a big gap in the road is an immediate red flag.