What's particularly crazy about this interchange is that there is going to be a second, elevated peanut roundabout that's rotated 90 degrees, for buses to use: https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg...

I think the "peanut" shape of the transit roundabout is not final. They're going to straighten the sides to make it more of a race-track shape. Having straight sides allows the busses to align themselves better with the curbs for passenger access. That rendering is a bit nonsense, its outright missing the 85th/114th intersection

The buses will at least have an easier time, they should be all trained for how to navigate it if it's on their route, and there's much less traffic on the bus-only part.

That's a fantastic rendering. I hadn't seen it.