What would the downsides be to trying to work with the Carolinian to just add 2 more trains in the morning and 2 in the evening between Raleigh and Durham? If you added two more morning trains and two evening ones to the current service it’s pretty much commuter rail. I just heard from friends who took the train to Durham then uber back and thought about this. Is there a big technical problem with having more of the same exact Carolinian types of trains the just do a Raleigh to Durham and back route that I am unaware of?
Edit: I meant the Piedmont not the Carolinian. And I am not suggesting adding full trips to Charlotte. Just adding more “Piedmont” trains between Raleigh and Durham.