If it wasn't obvious already, I am a big fan of public transport... especially trains.
In terms of the train I built, I based it off a bunch of different metro/commuter/suburban trains that I have ridden in the past. The most prominent are my local 3000 class diesel railcars and the Comeng Electric Train in Melbourne. Size-wise, however, the train is probably most similar to a Wellington FP 'Matangi' Class, and I definitely took some cues with the 'barrel-esque' shape of the cross section.
I went for longitudinal seats as there was limited space inside. I liked this seating layout and it is common in Japanese commuter trains in particular. I think it looks really neat.
Anyways, here are more pictures:
DISCLAIMERS: Requires Infinite Electricity and it's also 3000 parts. IT WILL NOT RUN WELL!