I designed the first one of these to be seen in PA: https://www.npr.org/2024/05/28/1243933142/diverging-diamond-interchange-chlewicki

It never got built, but PennDOT loved what we presented to them and used it elsewhere. I've also dealt with Gil on the design. He was aggravating as he kept evolving the design parameters as we worked on it, as if he was refining the standards by using us as a casestudy in the geometry. He was also high concept and didn't grasp the hard design requirements PennDOT has that I also had to work within.

#worktoot