Sorry it took me a while to get back to this. I'm interested in the things in the super relation for the historic alignments of US 80 that are no longer roads.

relation(8534013);
(._; >>;) -> .old80;
way.old80[!highway];
out count;
way.old80["abandoned:highway"];
out count;

The actual historic route is https://www.openstreetmap.org/relation/9712655. This other stuff looks like it belongs on OHM.