Yes, InRoads SS2 has Horizontal & Vertical Element Regression that does best fit geometry. I use Single Element Regression quite a bit. The main requirement is to have the Cogo Points to produce the needed Regression Points to run the tools. The H&V Regression Tools are an Application Add-in that have to be turned on to integrate them into the Main menu. Personally, I don't know of a good documented resource or "Help" ...other than what's in my head ; )
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