IMO: This isn't a case of "double half interchanges", just a parclo / folded diamond variant that's spread out a bit due to the curvature and geometry of the roads involved. Thus a single point is best, where the center lines cross.
If we don't extend routes to the "medians" of routes they end at, we need to truncate the south end of RI 2.
Ending one route at the "median" of another is a good, common rule of thumb.
Just a few examples that pop to mind in my states (there are countless others), by increasing complexity:
• neroute2's
RI2 example
•
ME22 has its
signed end at State St, AKA ME77 south.
• or to get a bit head-explody, neroute's quote above from the usanyp thread ties into some discussion of
NY OcePkwyBro got its north end.
