I drew this one up mainly to see if it was possible to fit OO gauge E shaped block plan into a single car garage, rather than a more traditional around the walls effort. It just about fits in with a reasonable aisle width by reducing the minimum radius on the turn back section on the peninsula section to 2' radius.
The scheme is just about workable in OO though would look a lot better visually in a wider room or in N or perhaps American or Continental narrow gauge in either HOn3 or HOm.
This time I have included one medium and two small stations on the section between Barnagh and Abbeyfeale with staging on one side of the room. It might be worth designing the staging as two side, by side yards representing Careys Road & Tralee with a linking track to allow through running. Each yard would have its own run round and spurs for storing locos to allow for a more interesting timetable operation than tail chasing. Ideally Barnagh should be modelled as a summit section rather than on a flat baseboard with trains climbing from Abbeyfeale and the Limerick end of the staging.
I have been getting to grips with Templot a track template design software for a small EM layout before I try my hand at serious planning for a broad gauge layout.