JdeBPOne knows when one has watched too many #TrafficEngineering videos on YouTube when:
Re-watching #TheWizardOfOz movie today, I spotted that there are two roads leading from Munchkin City: the Yellow and Red Brick Roads. They terminate at a central gyratory.
But the intersection, like much road design, was clearly engineered for more exits than ended up being built, but now cannot be expanded according to the original plan. The Yellow and Red Brick roads don't end at diametrically opposite sides of the central circle, but actually quite close to each other on the circumference. Moreover, there's no room to put in the other 5 or so Brick Roads that there is space for on that circle.
There are some motorway and A road roundabouts like that in my neck of the woods, with phantom exits or spaces for (say) planned flyovers that never got built.
It's worth noting that the Yellow and Red Brick roads never actually meet.
PhillipeSudDuMonde 
