Move the Waukegan toll structure north past the Rosencrans exit - the Grand Avenue interchange at rush hour is a zoo all through the year, not just when Great America is in season, and I’ll bet a significant number of cars bail there just to avoid the last northbound toll (which is about double the others on the road). And if they put the toll booths between 173 and the Wisconsin border, they’d still get the cheeseheads heading home.
It wouldn't surprise me. I've seen a line waiting to take the last exit before the toll on SB I-95 in Delaware.