Why isn't there something like CollapseDualLinesToCenterline in Pro. Now I've found another reason why I just can't live without Desktop still.
Yes it isn't on the list but there are others, which may not be a complete substitute but might get you somewhere
Merge Divided Roads (Cartography)—ArcGIS Pro | Documentation
Collapse Road Detail (Cartography)—ArcGIS Pro | Documentation
Thanks Dan. I had messed around with Merge Divided Roads for awhile before I decided it wasn't worth putting that much effort into trying to make my 2 light rail lines look like roads in order for it to work. Since I still had ArcMap loaded it was much easier to get CollapseDualLinesToCenterline to work. Yeah, maybe I'm being lazy but I will still use the ArcMap way until Esri either puts the same functionality in Pro or I HAVE to do something different.
If you want it revived, submit it as an "Idea". If it catches on, it might be ported over sooner
Done
I responded to your idea about this with an option that might work for you: