Laying out this exact setup at Exit 4 on 83. Second of its kind in the state, the other is in Washington PA. It’s a real treat to layout, nothing is simple curves but ellipses and spirals. Easy enough to draw on paper but a mother to actually stake on the ground. Especially in phases...I saw this week on the local news Ephrata is getting a Diamond interchange. I've only seen one in person. But it's cool how these work.