MO77: Ferry -> DorHicFry
Approaching this from a different direction: How about MO/KY? Like, it's not exactly the border but you're at the border point equivalent?
WI US10: Ferry -> uh... LudManFry? SSBadFry?
What about WI/MI as a pseudo-border point here too?
Both of these could cause problems if we were someday to set up a ferry routes system. Each of those routes would presumably include a border point in the middle, such as WI/MI in the middle of Lake Michigan for the S.S. Badger route.
NJ US 9 used to end at a pseudo-border point (DE/NJ) at the ferry terminal. I changed that to CapeMayFry, matching what had been and still is the waypoint label for the DE US 9 endpoint.
Other suggestions, to place endpoints at some place other than the ferry landing, unless the route actually ends short of the ferry terminal (as appears to be the case for MI US 10 -- WI US 10 signage continues right up to the loading ramp in Manitowoc), might also complicate a future ferry system, and I otherwise don't like that idea.