You think round-de-bouts are bad. Wait untill you see this.

The simple answer is that big rigs of all types have more limited traveling options than a car and if a particular area is inadequate then the driver should be alert enough to avoid the area.

I don't know if the OPs "Reduced Conflict Intersection" is one of those for large RVs, semis, etc or not. I do know that that I would not use it if there was any doubt.

I also suspect that if this setup is not adequate for for large rigs there will be large signs to that effect (or there will soon be signs).