"Multiple lane roundabouts can work."
Now that certainly is true. They CAN work.
But they can work in the same sense that a person can be dropped off out on the ice pack in January 200 miles north of Barrow Alaska in January...be given a few Inuit survival tools and he could come walking safely into Barrow the next week. Yup...it can happen....but not for you and me. We would be Polar Bear Popsicles. But I'm sure that for any number of Inuit, it would be a walk in the park. They would have long racial/cultural/family historys with surviving using the old ways. Yes....given special training white people could do it too. But just dropping random members of the population off out there under such curcumstances wouldn't be a good idea.
Building a round-about like that in the middle of an American town (particularly in proximity to a hospital!) isn't a good idea either. People will die needlessly in both situations.
Seems to me that the Ancient Romans built roundabouts for them donkey drawn ox carts out in Europe before the birth of Christ. Europeans have long experiance with the roundabout concept long before they are old enough to drive. It's a long standing thing in the culture; like pack-ice survival is for the Inuit. Here in Eugene, both things are alien and dangerous for the vast majority of the population here.
With it's proximity to that hospital, can you imagine being hysterically driven there after having a severed limb. Your lifes blood squirting all over the car. Seconds are hours and your life is draining away....then.....the "ROUND-ABOUT!". Your driver doesn't know how to use it or someone else on the roundab-out messes up (Very understandable). You are toast. And stuff like this is gunna happen, time and time again. This is completely inappropriate. This Round-about is an ongoing horror show.
An ascendant man, living in a degenerate age, MUST, by definition, live in contradistinction to his times.