Hey man, great work here, just a few things I'd like to mention; the starting interchange has one major flaw I'd like to point out. No left turns off of the highway can happen within each roundabout of the dumbbell. Any time someone wants to make a left off of the highway they have to go through the entirety of the interchange, essentially causing them to stay in the interchange MUCH longer than they have to, which could lead to some clogging up the system if someone relies too heavily on it (ie, doesnt make a secondary exit)
My advice to alleviate this is would be to just rework your lane forcing a bit to allow for left turns off of the highway to make the turn in the initial roundabout they encounter.
As for the rest, I thank you greatly for showing Paradox the level of networking they need to hold themselves to! I was really disappointed when I saw these lovely maps but an honest to god regression of networking quality from the Campus DLC.