The history of this traffic pattern is quite fascinating. It's common to see claims that it was "invented" by somebody in the US, yet it had been in use since a

The history of this traffic pattern is quite fascinating. It's common to see claims that it was "invented" by somebody in the US, yet it had been in use since at least the '70s in France already [0]. I guess it's a case of "parallel discovery" - but some ~30 years later. For whatever reason, the more modern "reinvention" has taken off in a way the original did not. [0] https://en.wikipedia.org/wiki/Diverging_diamond_interchange https://en.wikipedia.org/wiki/Diverging_diamond_interchange