Discussion upthread indicates that it will be a rerouted DE 24. (https://www.aaroads.com/forum/index.php?topic=372.msg2833009#msg2833009)
Wow, I didn’t think DE 24 was gonna be rerouted onto it since the bypass would add a lot of mileage to the route since it would have to take US 113 northwest to connect to the west end of the bypass. I thought maybe it would have remained unnumbered and been signed “To DE 24” eastbound and “To US 113” westbound
It adds about 2 miles. But avoids the 1-way/1-lane slog through downtown Millsboro and a very long wait for the light at the 24/113 intersection.
I wonder if DelDOT will designate the alignment through Millsboro as DE 24 Business once the bypass is completed.
Considering the apparent reluctance of DelDOT to establish any new routes, I doubt it. Old SR 1 along Bay Road and old U.S. 301 between SR 71 and SR 299 became unnumbered roads. Plus the last state route added to the system was SR 404 Business in 1999 (not counting the renumbering of SR 2 along Elkton Road in Newark to SR 279). The bannered routes for SR 24, SR 30 and SR 54 have since come and gone.