Parts of the country have been using roundabouts in highway interchanges for years. Western Colorado has a number of them.
This one is close to 20 years old: https://www.google.com/maps/place/39%C2%B037'37.8%22N+106%C2...
Another one that is basically five roundabouts in a row: https://www.google.com/maps/place/39%C2%B038'12.9%22N+106%C2...
I know of at least two others along that same stretch of highway.
The phrase "5 roundabouts in a row" is nightmare fuel for sure, but the actual map makes it look a lot more reasonable :)
The phrase "5 roundabouts in a row" is nightmare fuel for sure, but the actual map makes it look a lot more reasonable :)