While my primary modeling focus is the New Haven Railroad's "Valley Branch" between Old Saybrook & Hartford, CT, my secondary interest is the old "AirLine" between New Haven & Willimantic/Boston. This line crossed the Valley branch in Middletown and, in 1947 local freight service ended in Amston/Colchester. For the purposes of my operating sessions (and unless/until I too build a line across the "Connecticut River"), the AirLine job will begin in "New Haven" (hidden staging) and turn around in Middletown. Even less-prototypically, the two towns I currently have representing this line are totally fictional, but they're on two almost-done modules and are the closest thing I have to a "completed" layout so far.
So, without further ado, here are the track layouts for the fictional AirLine towns of "Somerset" and "Mill Hollow."