Many years ago I lived and worked within a mile of the Northeast Corridor (the "NEC"). On warm nights with raised windows I could hear Amtrak slipping past. Around that time Atlas introduced its HO scale AEM-7 and I started doodling an HO layout. I only had to walk down the street to find the prototype and many evenings my car joined a small parade of Norfolk Southern "Triple Crown" RoadRailers for a few blocks on my drive home. That layout never made it off of the paper I drew it on, but its kernel survived.
The seeds for the N scale layout drawn below took root last year. Railroad Model Craftsman published two articles last summer inspired by the NEC. Both were room sized layouts and one was in N scale, built on a hollow core door. Hiroe's NEC modules were also inspiring. So I reached for my pencil and started again. The layout is roughly triangular and has no backdrop. I hope that the triangular arrangement allows each scene to borrow from the other two.
The red rectangles are 3'x4' modules. Each side of the triangle hosts a large scenic element - a marshy estuary with lift bridges, a chemical plant, and a city station - united by the elevated tracks of the NEC. There is also a ground level freight line inspired by the PRR Shellpot branch that bypasses Wilmington and crosses the Christina River.
I am trying to leave room for shelf-style staging yard connections, maybe disguised by a flyover junction. I also saw some clever staging loops used by FreeMoNebraska and the Bridgeport & New London. I don't think I need to worry about that detail right now.