I-95: US1 should be US1_S since these routes are concurrent now.
A similar situation to
NJ US40 & NJ140.
Although for that one, you discussed the waypoint label on the route that doesn't end, and here, you discussed the label on the route that does end.
Drafting a response My thoughts on how I handle similar situations are in that thread...
In a nutshell...
I-95 doesn't split from the multiplex here, and it's debatable whether US1 does (less of a split & just one route unceremoniously ending).
I prefer what both routes would actually be intersecting at this location -- in this case,
FedHwy.