This really cool, but there is something weird going on with the intersections in this one.
For one thing, where the highway ramp-off joins the round-about, using TM to set up yield + enter blocked junction doesn't work. The cars on the round-about always briefly stop when there is traffic waiting on the ramp.
There also seems to be a hidden intersection/road misalignment on the round about right between the highway lanes. It's not cars like to do sudden lane switches there.

Best one I've ever used!