The D&L trail already has a relation https://www.openstreetmap.org/relation/270026 so we'd just add to this, but since it's just "proposed" (thanks for the ref) at this point probably best to remove the name and leave the segments where there's no overlap, and delete the overlap segments.  Once they decide to add the segments to connect to Bristol Spurline Trail, then we can add it to the relation.

Incidentally I wonder if the D&L should be spelled out to Delaware & Lehigh?