Saw this article today...US 421 Bypass of Sanford is now open. Some of the ramps to Cumnock Rd have not been paved yet so that small part will wait until spring...
http://www.sanfordherald.com/news/leecounty/x2133899152/U-S-421-Bypass-open-to-motorists
The old route is supposed to become 421 Business. NC 87 BYPASS is on the bypass with bannerless NC 87 continuing through town.
Separately I got an email recently reporting some US 87 signs at the south end of the bypass...
Mapmikey
I drove the bypass on February 9th. All of the NC 87 Bypass shields on the bypass were US 87 shields. The shields were correct on overheads and on intersecting roads.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Froadgeek.filpus.org%2FPictures%2FIMG_3878.JPG&hash=8d192e71969b0e6f546bbcae6e308dd1fc5446f1)