The mystery as to what would become of old US 219 has been solved. PennDOT has extended the SR 2047 designation north from its previous terminus at the northern terminus of Business US 219 in Meyersdale to the former southern end of the expressway southeast of Somerset: http://www.dot7.state.pa.us/BPR_pdf_files/Maps/GHS/Roadnames/Somerset_GHSN.PDF.
Why not designate the old US-219 as Business US-219? Since it connects Berlin that might be a good idea.
Granted that PennDOT usually doesn't do that when a new freeway replaces a U.S. route, they just remove the route number.
I'm not sold on Business 219 since this serves a rural area and doesn't immediately parallel the old road, but portions of this should have been given a traffic route designation, at least to prevent PA 653 from having a dangling end. I'd have extended PA 653 to US 219/Business 219 on the north side of Meyersdale. I'd probably also route PA 601 along Old 219 from downtown Somerset out to PA 160 at Berlin. Old 219 between Garrett and Berlin is probably best left as a quadrant route to avoid encouraging through traffic. Mud Pike from the new freeway is the better option for accessing Berlin from the south.
