I've done something similar, just because it's my first playthrough and I'm coming from factorio, and main bus is the only thing I know how to do right now! But mine is 10 times the spaghetti for 1/10th the production haha. Well done!
I worked at Frankfurt airport (Germany) as a security agent. The catacombs (where all the luggage goes and is handled) looks pretty similar to this. So it's not too crazy i guess^^